Insulator Companies
List Includes U. S. and Foreign Companies
and Company Catalogs in the Files of the
Insulator Research Service
The original company listing was quickly put together as a searching guide for a research trip to the Smithsonian Natural History Museum catalog archives in August 2006. A special thanks to Caleb Thimell for supplying his list of foreign insulator companies and to Rick Soller for his input and company listing on his web site. Recent resources for additions to the list and historic details came from the links shown below with a few individual contributions, most notable being Jean-Pierre Volatron. A special thank you to Bill Meier for dramatically improving the table formating and file size. With Bill's help, this simple list will eventually be expanded to include company histories. Stay tuned...
Thank you, Jean-Pierre Volatron, for correcting and updating the listing for French companies (12-27-06).
For additional historic information, try these links:
David Whitten's web page
Rick Soller's web page
Joe Maurath, Jr.'s web page
Porcelain Products history
Insulator Patents (almost 3000 utility and design patents)
For a list of insulator CATALOGS in the IRS files, click on the link.
For a complete database of nearly 3,000 insulator related patents including more than 300 lightning rod related patents click on this link: Patents
HELP!! Please help me make the company listing as accurate as possible. Use the email link on the Home page to offer corrections, additions, comments, etc. This list is a work in progress. All help is welcome!
(updated June 28, 2009)
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| Name | Insulator Markings | Dates of Operation | Location | Comments |
|---|---|---|---|---|
| A. E. Co. Inc. [see Automatic Electric Co.] | A. E. Co. Inc. | |||
| A. J. Wilkinson & Co. | Boston, MA | Electrical supplies | ||
| Accessories Mfg. Co. | GATE INSTALATOR | Chicago, IL | electric fence insulators | |
| Acme Porcelain Works | 1900-?? | Trenton, NJ | The plant started in June 1900 by Noah W. Boch. The company manufactured electrical porcelain specialties. He also operated at the time American Porcelain Works at Berryville, NJ. | |
| Adamant Porcelain Co., Ltd. | 1904-1910 | Broadway, VA | Converted from the abandoned Broadway plant. One source says the company failed by 1910. | |
| Adamant Porcelain Co., Ltd. | 1905-1910 | Harrisonburg, VA | Converted from the abandoned Virginia Pottery Co. plant. One source says the company failed by 1910. | |
| Adamant Porcelain Co. | HOLD FAST | 1907-1929 | East Liverpool, OH | According to Jack Tod's Electrical Porcelain book, the Adamant Porcelain Co. was organized in 1907 by J. C. McQuilken, W. J. Curry, W. A. and T. J. Andrews to make electrical porcelain. The plant was closed in 1913. The defunct company was purchased by Harry Peach and George Reid in 1915 and name was changed to T. V. Milligan Porcelain Co. and product sold under the "Adamant" name. However, the Adamant Porcelain Co. was listed as a new incorporation in The Mansfield News on May 8, 1915 (see article 7298) with George H. Reid as owner. The plant was destroyed by fire on February 7, 1918. The 1921 EMF Electrical Year Book said the company manufactured porcelain nail knobs. According to the 1909 History of the Clay-Working Industry in the U. S., Adamant started in 1904 in Broadway, VA and 1905 in Harrisonburg, VA. |
| Agarwal Salt Co. | modern | Bikaner, India | Manufacturer of porcelain insulators | |
| AGROB Corp. | TREVERIS | Munich, Germany | ||
| A I Industrial Products Ltd | DOULTON | 1982-early 1990's | England | Name changed from Allied Insulators Ltd with purchase by the Fairey Group Ltd and took on the Doulton division. The Doulton division was known as Allied Doulton Insulators. In the early 1990's that division became part of the Beauford group. |
| Aire and Calder Bottle Co. | England | The 1851 Official Catalogue of the Great Exhibition of the Works of Industry of all Nations page 125 described this company: "The Aire and Calder Bottle Co. Breffit, Edgar, Castlefor, near Pontefract, Manu. -- Bottles for dispensing and general purposes, with patent hollow corks and combination stoppers. Glass tablets, with inscriptions in glass. Glass insulators, for telegraphs." | ||
| Ajax Electric Co. | AJAX | ??-1920's? | Jersey City, NJ | The 1921 EMF Electrical Year Book said the company manufactured electrical supplies such as wiring devices, switches, panels, electric railway material, overhead trolley equipment, etc. Address was Montgomery St and Baldwin Ave. President, W. C. Banks. |
| Ajax Electric Specialty Co. | AJAX | 1918-1920's? | St. Louis, MO | The 1921 EMF Electrical Year Book said the company manufactured porcelain portable lamps, radio and wiring devices. Address was 1011 Market St. President and general manager was James S. Cuming; Vice-president, Oscar Walters, Treasurer, E. H. Blehle. |
| Akron High-Potential Porcelain Co. | H. P. CO. | 1906-1910 | Barberton, OH | An unknown company may have started as early as 1900, but the Barberton Pottery Co. was formed in 1902 and was actively making third rail insulators in 1905 when that part of the business was purchased by Akron Smoking Pipe Co. (Akron Porcelain and Plastics Co. history book, Molding A Legacy, published in 1989 states the date was March 1, 1909). After Barberton Pottery Co. was declared bankrupt in July 1905, Akron H-P Porcelain Co. was formed by M. Otis Hower, president; George H. Kile, secretary and treasurer; and A. L. Dyke, superintendent, restarted the plant in November 1906. The company president, George H. Kile, asked for Fred Locke's help, but he was busy fighting a law suit of patents with the Locke company, so he sent his son, Morton, who was only 20 years of age. Initial production was dry process porcelain and it was the company's main focus. Morton's charge was to help them make wet process porcelain. After about one year (sometime after Thanksgiving 1906, Mr. Kile asked Morton to leave saying he was dissatisfied with his work, and got Morton to sign a paper canceling his five-year contract. The official start of Akron-HP was 1906, but that apparently was part of the legal relationship with Ohio Brass to take their entire production. Ohio Brass took over the company in 1910 and changed the name to Ohio Insulator Co. |
| Akron Insulator & Marble Co. | A. I. & M. CO.; STANDARD | 1894-1904 | Akron, OH | Company was incorporated in August 1894 with the name changed from Akron Marble & Novelty Co. It was referred to as the "Akron marble works". Plant was located at 973 Grant St. Samuel C. Dyke was superintendent until he ran away with an employee (young widow) in January 1896. A. L. Dyke was the manager until 1905. Company manufactured pottery knobs, tubes, cleats. In late 1904 or January 1905, it was consolidated with the Colonial Sign Co. as Colonial Sign & Insulator Co. (see article 8716). |
| Akron Marble Co. | 1893-1894 | Akron, OH | Abbreviated name for Akron Marble & Toy Mfg. Co. Manufacturer of pottery knobs, tubes, cleats | |
| Akron Marble & Novelty Co. | 1893-1894 | Akron, OH | Started by Samuel C. Dyke in January 1893. He had previously founded the Akron Stone Marble Co. in Nov. 1892. Akron Marble & Novelty Co. became Akron Insulator & Marble Co. Plant was commonly referred to as the "Akron marble works". | |
| Akron Porcelain & Plastics Co. | 1984-present | Akron, OH | Successor to Akron Porcelain Co. Manufacturer of specialty porcelain | |
| Akron Porcelain Co. | 1928-1984 | Akron, OH | New plant built on 400 feet of railroad frontage in Kenmore, OH (now Akron) on the Akron-Barberton Belt Line Railroad and the company name was changed from Mogadore Insulator Co. | |
| Akron Smoking Pipe Co. | A. S. P. CO. | 1890-1920 | Akron, OH | The company was incorporated on September 3, 1890 by Fred Butler, president; John W. Butler, J. C. McMillen, Charles H. Palmer, treasurer; and Charles Baird. They bought out the business of five smoking pipe companies. Manufactured pottery knobs, tubes, cleats by 1895. Name changed to Mogadore Insulator Co. on April 20, 1920. |
| Akron Smoking Pipe Co. | 1888-1920 | Pamplin City, VA | They only made smoking pipes. | |
| Aktiengesellschaft Brown Boveri & Cie | Baden, Switzerland | |||
| Albert & J. M. Anderson Mfg. Co. | Boston, MA | Supplier of trolley line equipment, composition insulators (Aetna Insulators), wooden strain insulators | ||
| Alberts & Kluft | AKA | Tilburg, Netherlands | ||
| Alexander, Barney & Chapin, Inc. | New York, NY | Electrical supplies, porcelain cleats and spools (marked U.P.W.), Victor Split Insulator (marked "The E. S. Greeley & Co., NY), glass insulators - CD 133, 126, 134, 162 and 145, floor insulators, Brown's screw glass insulator, oil insulator, tree insulators, etc. | ||
| Algoma Eastern Railway | AER | 1911-1958 | Canada | White porcelain insulators with under-glaze ink marking AER were used on this railroad line. The railway was incorporated in 1911 and leased by the CPR in 1931 and became fully controlled by CPR in 1958. |
| Allied Doulton Insulators | England | See A I Industrial Products Ltd. Management buyout in the late 1990’s saw Allied Insulators purchased along with Wade Ceramics to form the Wade Allied Group. The Milton manufacturing site was closed in 2001, Allied Insulators now operates from the Stone factory and supplies the insulator market via strategic foreign partnerships. | ||
| Allied Insulators Ltd. | 1959-1979 | England | Formed from merger of Bullers Ltd and Taylor Tunnicliffe & Co. In 1979, named changed to A I Industrial Products Ltd. | |
| Allied Porcelain | ||||
| American Automatic Electric Sales Co. | Chicago, IL | Telephone supplies, Hemingray, Whitall Tatum | ||
| American Electric Co., Inc. | AMERICAN ELEC CO INC | 1893-? | Chicago, IL | Telephone supplies; they sold U-188 dry-spot insulators made by Square D from 1925 to 1929 (see Automatic Electric Co.) Address was 6401 S. State St. President and Treasurer, P. C. Burns. |
| American Electric Porcelain Co. | 1910's | East Liverpool, OH | Operated a number of plants in East Liverpool. In 1913, these plants were shut down and operations moved to a new 21-kiln plant in Parkersburg, WV. | |
| American Hard Rubber Co. | 1898-1930's | College Point (New York City), NY | The original company was founded in 1854 by Conrad Poppenhusen to make flasks, cups, and buttons using vulcanization process for hardening rubber patented by Charles Goodyear. In 1898 several rubber companies were merged to form the American Hard Rubber Co. The company moved to Butler, NJ in the 1930's and soon closed due to competition from plastics. Known antenna insulators are of the small strain type, "Radion Brand". The reddish brown rubber has a metal eye-loop on each end. | |
| American Iron Glass Pipe & Plate Company | National Insulator Co. | 1884-1885? | Haverhill, MA | There is a possibility that the Iron Glass Works was the actual factory location where many of the American Insulator Company insulators were produced. At least some of the "National Insulator Co" embossed insulators were almost certainly made here. |
| American Insulator Co. | AM.INSULATOR CO. N.Y. | c. 1883-1886 | Boston area, MA | Although insulators made by (or for) this company are embossed "AM.INSULATOR CO. N.Y." (on the base), business offices were located in both New York and Boston according to directory listings. Possibly the actual manufacturing facility was located in the Boston area, and may have been the American Iron Glass Pipe & Plate Company (Iron Glass Works) factory at Haverhill, Massachusetts. In addition, recent evidence has surfaced which indicates the Lyndeborough Glass Company, South Lyndeborough, New Hampshire (1866-1888), produced some of the American Insulator Company insulators. Samuel Oakman patents were used. |
| American Insulator Co. | AICO; AMERINE | 1916-1920's | New York, NY | John Wesley Hyatt invented Celluloid in 1866. At the turn of the century (c. 1900) Emile Hemming developed cold molding and founded the American Insulator Co. in 1916. Baekland invented the first truly synthetic plastic in 1909 called "Bakelite". By 1927 the company name was American Insulator Corp. with headquarters listed as 52 Vanderbilt Ave., NYC. The cold molding plant was in New Freedom, PA and the Bakeline plant was in Danbury, CT. Manufactured sockets, bushings, receptacles, connectors, casings, table outlets, etc. |
| American Insulator Corp. | New Freedom, PA | The 1921 EMF Electrical Year Book said the company manufactured molded insulation, insulators, etc. President, Emile Hemming. | ||
| American Iron Glass Pipe & Plate Co. | 1884-1885? | Haverhill, MA | Company was organized on March 31, 1884 and started production in mid-December 1884. It was referred to as the "Iron Glass Works" and the "Iron Glass Co.". Produced insulators (CD 110.5 and CD 110.6) for the National Insulator Co. | |
| American Jobbers Supply Co. | ||||
| American Lava Corp. | 1902-1920's? | Chatanooga, TN | Address was 1429 William St. (see Steward (D. M.) Mfg. Co.) The 1921 EMF Electrical Year Book said the company manufactured lava for mechanical and electrical purposes. President, P. J. Kruesi; vice-president and general manager, John Kruesi; secretary, H. R. Smartt; treasurer, W. A. Jeffords. | |
| American Marble Co. | circa 1901-1904 | Akron, OH | Listed in 1901 Powers' Central Station Directory and Buyers' Manual as making clay insulating cleats. Probably name change from American Marble & Toy Co. because various insulators found at that site from the 1904 fire were marked AMC. | |
| American Marble & Toy Co. | AM; AMC | 1891-1904 | Akron, OH | Standard porcelain began probably in mid-1890's; markings on insulators were AM and AMC; plant destroyed by fire in 1904. The plant was located at State and Center streets on the canal. It was started in 1891 by Samuel C. Dyke, A. L. Dyke, and other local Akron businessmen. This company was the largest toy manufacturer in the United States during the 1890's. Almost every type of marble known to exist was made at this factory including hand gathered glass marbles, glass marbles cut from canes, stoneware marbles, china marbles, plain clay, low-fire, porcelain, glazed, painted, etc. Sam Dyke left the company in the Fall of 1892. One reference (page 12 of book Molding a Legacy) suggested the company started making insulators in the mid to late 1890's. They did make pottery (clay) knobs, tubes, and cleats with the markings A. M. C. The plant was destroyed by fire in 1904. Today the factory site is covered by a beautiful park which also includes the American Marble and Toy Museum. |
| American Porcelain Co. (The) | AMERICAN; AP in a circle | 1914-1932 | East Liverpool, OH | Probably made U-98 Cooke Wilson E.S.Co. insulator. Listed in the 1921 EMF Electrical Year Book as manufacturer of porcelain cleats, tubes, insulators and other electrical porcelain. President, W. J. Curry; secretary, M. Batey; treasurer, W. A. Andrews. |
| American Porcelain Mfg. Co. | 1854- | Trenton, NJ | A company by this name in Gloucester, NJ was incorporated in 1854 by John C. Drake, Abraham Bechtel, George B. Keller, Peter Weikel, and Martin H. Bechtel of Philadelphia, PA. Charter expired in 1899. No information about the company. Possibly related to American Potteries Co. | |
| American Porcelain Works | 1894-?? | Trenton, NJ | Owned by Noah W. Boch and located in Berryville, near Trenton. Works location was Artisan and Murray Streets. In 1898, products were specialties, knobs and electrical goods and jardinters. Company was incorporated on April 19, 1910 with $125,000 in stock. Agent was listed as John C. Rittenhouse. Boch also started the Acme Porcelain Works in East Trenton, NJ. in 1900. | |
| American Potteries Co. | 1898-? | Jersey City, NJ | Trust of 18 potteries in Ohio, West Virginia, and western Pennsylvania incorporated on December 15, 1898 with a capitalization of $27,000,000 and 1,000 share outstanding. Address was listed as 243 Washington St, Jersey City, NJ (see article). Bell Pottery Co. of Findlay, OH filed suit against the trust in January 1899. Options on acquiring or combining the 18 potteries into one company expired in February 1906 as the third and final attempt to form a trust failed. A similar trust or combining of companies was finally accomplished in 1911 with the formation of the General Porcelain Co. | |
| American Sign Co. | MILHAM | Kalamazoo, MI | sign insulators | |
| American Sundries Co. | AMERICAN SUNDRIES CO. | Brooklyn, NY | Electrical supplies | |
| American Telephone and Telegraph Co. | ||||
| American Union | A. U. | A shortlived competitor to Western Union. | ||
| Anchor Electric Co. | 1915-1920's? | Chicago, IL | Address was 557 West Jackson Blvd. The 1921 EMF Electrical Year Book said the company manufactured automobile lamps, incandescent lamps, vacuum electrodes, etc. President, treasurer, general manager, E. E. Caralun. | |
| Anciens Etablissements Parvillee Freres & Cie (Former Establishment Parvillee Brothers & Co.) | 1899-1949 | Cramoisy near Paris, France | See Parvillee | |
| Anderson (Electric) Porcelain Co. | A. P. Co. | 1902-1911 | East Liverpool, OH | Manufactured electrical porcelain. Merged into General Porcelain Co. |
| Andrae (Julius) & Sons Co. [see Julius Andrae & Sons Co.] | ||||
| Andre (M. M.), Pillivuyt, and Co. | 1850's | Foecy, Cher, France | From 1878 Journal of the Society of Telegraph Engineers: "The first order for this pattern was given on April 4, 1850, to Doulton, of Lambeth, to be made in his brown stone earthenware. On August 27, 1850, Mrs. Walker dug the first turf of the first hole for the first pole of the above branch at Red Hill Junction, on which pole this form was then first used. On November 22, 1852, the original order for the same form in porcelain was sent to M.M. Andre, Pillivuyt, and Co., of Foecy, Cher, France. Their first consignment came to hand on January 31, 1853, which is, I think, the first introduction into this country of porcelain as an insulator for telegraph wires." | |
| Anglo-American Potteries | ?? | Company was organized about June 1903 to build five potteries in the western U. S. One was suppose to make electrical porcelain. | ||
| Anylite Electric Co. | ANYLITE | 1918-1920's? | Ft. Wayne, IN | The 1921 EMF Electrical Year Book said the company manufactured lamp socket dimmers and dimming sockets. President, G. A. Jacobs. Address on Wall St. |
| Appleton Electric Co. | APPLETON ELECTRIC CO. | 1900-1920's? | Chicago, IL | The 1921 EMF Electrical Year Book said the company manufactured electrical supplies, outlet bushings. President, treasurer, A. I. Appleton. Address was 1703 Wellington Ave. |
| Arabia Porcelain Company | Helsinki, Finland | |||
| Arendelovac | Serbia | |||
| Argillon | 2003-present | Redwitz, Bavaria, Germany | History tied to Siemens when Siemens acquires ceramics plant Neuhaus-Schierschnitz. Insulator plant at Redwitz was started in 1950. In 1998, Siemens Fabyka Izolatorow SP. Z. o.o., Jedlina Zdroj started production of medium and low voltage insulators in Poland. Since September 2002, Argillon has belonged to the American Private Equity Firm KKR (Kohlberg Kravis Roberts & CO.). KKR is one of the worldwide leading capital investment companies that was founded in New York in 1976. | |
| Armstrong Cork Co. | Armstrong | 1939-1969 | Millville, NJ | Armstrong purchased the Whitall Tatum Co. in Millville, NJ in 1939. The company was purchased by Kerr Glass Manufacturing Corp. in 1969. |
| Arrow Electric Co. | ARROW; E with arrow through it | Hartford, CT | plug fuses and wiring devices | |
| Artistic China Co. | 1886-1904? | Trenton, NJ | The company was incorporated in December 18, 1886 with capitalization of only $10,000. The company name may have changed to Artistic Porcelain Co. when that company was incorporated on October 24, 1904. | |
| Artistic Porcelain Co. | 1896-1906 | Trenton, NJ | It is not known if this company was the successor to Artistic China Co. One reference said in 1898, products were specialties, knobs and electrical goods and plant was located at Cedar Land and Chambers street. Noah W. Boch was the manager of the company and owner, but did not hold stock in it. NJ records show the charter for the company expired in 1900. Then records show the company was incorporated on October 24, 1904 and located at Chambers and Williams Streets. Agent was listed as Joseph C. Sharkey. Capital stock was increased to $50,000 on January 9, 1906. One reference said Noah W. Boch filed for bankruptcy in January 1906. | |
| Art Potteries Private Limited | modern | Kolkata, India | Manufacturer of porcelain insulators | |
| Austin (A. O.) Insulator Co. | 1933-1969 | Barberton, OH | A. O. Austin left Ohio Brass and started the company. After he died in 1969, the company was purchased by British company Decca, Ltd. and plant was moved to near Toronto. | |
| Austin Insulators Inc. | 1969-present | Mississauga, Ontario | The company was owned by Decca, Ltd., Racal-Decca (1980), and then Litton Marine. In the year 2000, the company, the employees purchased the company. Manufacturer of tower base insulators, guy strains, feed-through bushings & RF insulators. | |
| Australian Consolidated Industries | A.C.I. | c. 1950-?? | Sydney, Australia | In the 1940's, several other smaller glass companies were merged into C.C.G. and name was changed around 1950 to Australian Consolidated Industries. |
| Australian Glass Manufacturers' Co. | A.G.M.; AGEE | ??-c. 1950 | Sydney, Australia | In early 1926, the C. C. G. was formed by a merger of Crown Glass, Ltd. with the Australian Glass Manufacturers' Co., which owned a majority of the shares. C.C.G. merged with Australian Glass Manufacturers in 1942. In the 1940's, several other smaller glass companies were merged into C.C.G. and name was changed around 1950 to Australian Consolidated Industries. AGEE is pronounced "A. G." |
| Australian Porcelain Co. | ||||
| Australian Porcelain Insulators Pty. | ??-1956 | API | ||
| Auth Electrical Specialty Co. | New York, NY | Electrical supplies, batteries, and battery rests | ||
| Automatic Electric Co. | A. E. Co. Inc. | 1891-present? | Chicago, IL | The Automatic Electric Co. was founded in 1891 by Almon Strowger after he received a patent on March 11, 1891 (447,918) for the first automatic telephone exchange, which allowed dialing a phone number. He was an undertaker in Kansas City undertaker who suspected telephone operators were diverting incoming calls to his competitors. Strowger developed an automated switchboard that could bypass human operators. The company later sold telephone supplies which included the U-188 made by Square D in Peru, IN from 1929 to 1951. |
| Babson Bros. Co. | SURGE | ??-1999 | Chicago, IL | Surge electric fence, CD 100 and CD 100.2. Company was purchased by the German company, Westfalia Landtechnik GmbH and renamed the company Westfalia-Surge, Inc. |
| Bailey & Co. | 1880's | London, England | Fulham Pottery S. W. manufactured battery jars, porous cells, and insulators. | |
| Baltimore Electrical Supply Co. | Baltimore, MD | Electrical supplies | ||
| Baltimore Glass Mfg. Co. | B.G.M.CO. | 1895-1897 | Baltimore, MD | B.G.M.CO. |
| Barberton Pottery Co. | 1902-1905 | Barberton, OH | The company was started by A. W. Blackburn and George C. Pryor along with Charles M. Karch, C. H. Schubert, J. E. Whigam, John McNamara, A. F. Stuhldreher, George Cox, and B. F. Tracy. The Dollar Savings Bank Co. filed suit for repayment of a $2,500 note, which forced bankruptcy on about July 15, 1905. The plant was taken over and restarted in 1906 as Akron High-Potential Porcelain Co with the apparent backing of the Ohio Brass Co. | |
| Bartlett & Co. | 1860's | New York, NY | Address was 289 Greenwich St. From Delling's "Before Threads": "They were manufacturers and dealers in glassware and produced telegraphic glass to order. Early in 1868 they advertised that telegraph insulators were constantly on hand; 40,000 were available for immediate delivery including curtain, egg and U.S. patterns. It seems possible that some of the insulators marked with names of other New York firms (Tillotson, Chester, Mulford & Biddle) were manufactured by Bartlett." | |
| Bay Ridge Specialty Shop | ||||
| Bay State Glass Works | 1878-1879 | East Cambridge, MA | Samuel Oakman was listed as agent. | |
| Bayliss, Jones, and Bayliss | 1880's | London, England | Manufacturers of telegraph insulators at 3 Crooked-lane. | |
| Beaver Falls Glass Co. | B. F. G. CO. | 1869-1879 | Beaver Falls, PA | Insulators marked "B.F.G.Co." were made by this firm, and several other unattributed styles are believed to have been made here as well. |
| Beaver Machine & Tool Co. | BEAVER | Newark, NJ | wiring devices | |
| Belknap Hardware & Mfg. Co. | Louisville, KY | Lineman's supplies, insulators, radio strains, lightning arresters | ||
| Bell Pottery Co. | c. 1890-1906 | Findlay, OH | The pottery had been in successful operation for many years making vitreous translucent china. In 1899, it filed suit against the consolidation of 18 potteries in Ohio, West Virginia, and Pennsylvania into a trust called the American Potteries Co. Formation of the trust failed in 1906. Bell Pottery filed for bankruptcy in 1905 and in 1906 the defunct plant was sold to a new company, U. S. Electric Porcelain Co. | |
| Bellevue Porcelain Works | c. 1904-05 | Boston, MA | 131 State St. except ads in 1901-02 state 45 Arch St. Maker of the "A. W." cleat. | |
| Bell Telephone of Canada | BTC | |||
| Bendix Aviation Corp. | Baltimore, MD | Aviation radio equipment, antenna insulator | ||
| Bendix Radio Corp. | BENDIX | |||
| Benjamin Electric Mfg. Co. | BENCO; BENJAMIN | Chicago, IL | light sockets | |
| Bennett (A. R.) patent insulator | 1880's | England | British patent for an insulator with multiple side skirts similar to the Lapp post insulators. | |
| Bennington Potteries (U. S. Pottery Co.?) | 1849-1858 | Bennington, VT | The Bennington pottery was started in 1851. It exhibited pottery and insulators at the 1853 at the Crystal Palace [Barber, Fig. 74]. They produced the following insulators: U-978, U-979, U-980, U-981, U-982, U-983 | |
| Bergman Electric Co. | 1880's-1890's | New York, NY | Bergman first made receptacles and cutout from wood under Edison patents and began investigating porcelain as a replacement for wooden insulation. In 1885, Bergman together with John J. Kraus from the Artistic Pottery at E. 18th St. in New York, started experimenting with dry pressed porcelain. The first product was made in 1888 with Bergman Electric taking the entire production. Bergman was later taken over by Edison Machine Co., which later became General Electric Co. | |
| Bernard Co. (E. G.) | E.G.B. Co. | Troy, NY | early adjustable cleats | |
| Best Electric Corp. | BEST | New York, NY | wiring devices | |
| Bharat Heavy Electricals Limited, Bangalore | modern | Bangalore, India | Manufacturer of porcelain insulators | |
| Bing & Grondahl | 1918-1941 | Copenhagen, Denmark | ||
| Binkley Mfg. Co. | BINKLEY | Warrenton, MD | wireholders | |
| Birla NGK Insulators Private LTD | 2003-present | Risha, India | Porcelain insulator manufacturer formed from merger of Jaya Shree Insulators and NGK Insulators, Japan. Another plant at Halol was started in 1981. | |
| Birmingham Glass Mfg. Co. | 1923-?? | Chicago, IL | Address was listed as 29 S. LaSalle St. founded by Harry C. Brown Bryson, E. R. Owens, Richard T. Robb, Geo. A. Peterson and Glen E. McDorman. | |
| Birnbach Radio Co., Inc. | BIRNBACH | New York, NY | Radio and antenna supplies | |
| Bissell (F.) Co. | 1892-1920's? | Toledo, OH | Electrical supplies: Hemingray, Lima porcelain, Locke glass, standard porcelain, P&S. Address was 226 Huron St. President, Frederick Bissell; vice-president, Walter S. Bissell. | |
| Bloom Jar Co. | 1910's | San Francisco, CA | The company merged with California Glass Insulator Co. in August 1913. | |
| Boch (John) Porcelain Co. | 1907-1919 | Newell, WV | Plant was started by John W. Boch, Sr. after he left R. Thomas & Sons Co. in 1907. The company was located at the northwest corner of 3rd and Harrison streets and made electrical porcelain. He became associated with Cassius M. Metsch and changed name to Boch-Metsch Porcelain Co. in 1919. | |
| Boch-Metsch Porcelain Co. | 1919-1922 | Newell, WV | See Boch (John) Porcelain Co. John W. Boch, Sr. left in 1922 and name was changed to Metsch Refractories Co. They manufactured electrical, heating, and porcelain specialties. Address is listed at East Liverpool, OH (across the river from Newell, WV). | |
| Bonle (Fuzhou) International Co., Ltd. | 1998 | Fuzhou City, China | Operates five factories for various small electrical goods such as switches, plugs, extension cords, porcelain pintypes insulators, suspensions and other porcelain styles, glass suspensions, and composition styles. | |
| Borgo | BORGO | 1921-July 1928 | Borgo, Italy | Italian glass factory owned by French company Folembray (Verreries de). Name was changed to Fidenza in July 1928. |
| Boston & Sandwich Glass Co. | 1825-1888 | Sandwich, MA | They are believed to have manufactured some insulators in the 1850s-1860s period, including CD 701.1 threadless types and lightning rod insulators. | |
| Boston Bottle Works | 1872-1877 | Boston, MA | Samuel Oakman | |
| Bouchery (G.) & Cie (G. Bouchery & Company) | 1897-1912 | Paris, France | See mini-gingerbread man: http://www.insulators.info/pictures/?id=182147954 | |
| Bourne (Joseph) & Son | 1850's-1890's or longer | near Derby, England | 6 St. Pancras Station, Euston road, N. W. and Denby Pottery near Derby. Manufactured various porcelain/pottery insulators such as Varleys "V" and "Z" pattern and the Fullers patent (U-1991-1992 series) corrugated inverted cone. The 1883 Telegraphic Journal and Electrical Review (London) stated they were making the Slater Lewis self-binding (screw-top) insulator. The Journal of the Society of Telegraph Engineers and Electricians published in 1881 stated "The peculiar qualities resulting from the composition of the paste from which these insulators are produced are a high degree of vitrification, combined with great toughness and strength. These qualities have led, since the commencement of the manufacture, thirty years ago, to a large and increasing demand. For many years the firm enjoyed the exclusive right to manufacture the well-known double V insulators, patented by Mr. Varley, whilst these and other shapes -- notably the Z pattern -- have been largely supplied to the English Government Telegraph Department." | |
| Brach, (L. S.) Mfg. Co. [see L. S. Brach Mfg. Co.] | BRACH | 1908-1920's? | Newark, NJ | The 1921 EMF Electrical Year Book said the company manufactured electric railway signals and other specialties. Also sold radio antenna insulators. Address listed as 127-129 Sussex Ave. President, treasurer and general manager, L. S. Brach; vice-president, A. G. Brach. |
| Brady Electric & Mfg. Co. | 1920's | New Britain, CT | Manufacturer of tree insulators. Listed in the 1921 EMF Electrical Year Book. Address was 42 Center St. | |
| Brewer-Titchner Corp. | Insulator hardware supplier | |||
| Brian Pottery Co., Inc. | 1898-1908 | Trenton, NJ | Located at 350 Hamilton Ave. near the Interstate Fairgrounds. In 1899, their ad stated "Manufacturers of Porcelain Baths, Wash Trays, Sinks, etc. High Grade Vitrified Porcelain for Electrical Purposes. New and Difficult Designs a Specialty." | |
| Bright's patent insulator (CD 630 and CD 631) | BRIGHT'S INSULATOR // REID 1858 | England | See foreign patent (Great Britain) 2601 granted 1858 to Charles Tilton Bright. His invention of the "double-cup insulator" included a larger skirt fitted down on the upper portion to cover the insulator below the cable groove on top. | |
| Brilliant Glass Products Co. | 1923-1926 | Brilliant, OH | Company was incorporated in October 1923 at Columbus, OH. The plant was located five miles west of Steubenville, OH at Brilliant, OH on the Ohio river. The incorporators are: W. A. Craig of Brilliant and W. K. Rogers of Wellsburg, W. Va. W. N. Matthews of Wellsburg has been elected vice-president and general manager of the plant. A general line of ship, railroad and automobile lenses were featured by the company, and it was announced that orders insuring a steady run of six months were now in hand. An additional day tank was to be built at once, giving the firm a battery of three tanks. In 1926, the plant was moved to Weston, WV. | |
| Brilliant Glass Products Co. | 1927-?? | Edmiston (near Weston), WV | Plant was moved to Edmiston which was on the Weston-Clarksburg interurban line near Weston, WV. Operations started on October 20, 1927. Products were lenses, automobile headlights, signal glass, radio accessories (antenna insulators), and novelties. | |
| British Insulated Callender's Cables Ltd. | England | Mine, trolley, tram, and electrical supplies | ||
| British Insulators and Helsby Cables | London, England | Porcelain; formerly Telegraph Mfg. Co. | ||
| British Insulite Co., Ltd. | circa 1883-1885 | England | Dr. Fleming had patents covering a composition material. In Feb. 1883, the company held a second annual stockholder's meeting reporting on the progress of obtaining equipment and property to build a plant. Some small amount of product had been produced and sold previously. Apparently this company was not successful as it was liquidated around July 1885. | |
| British Johns-Manville Co., Ltd. | early 1900's | London, England | Electrical supplies, molded black composition and mica insulators, Thomas glazewelds and multipart insulators. | |
| British Stone & Marble Co., Ltd. | 1890's | London, England | December 25, 1891 issue of the Electrical Review (London) stated in an ad: "A specialty in electrical insulators, composed of pure silica suitable for dynamos, transformers…telephones, telegraph insulators, cut-outs, fuse-boxes, switch plates, lamp holders, incandescent lamps, porous cells, ceiling roses, electric bells, and every description of electrical insulators." | |
| Brookfield Glass Co. | 1898-1921 | Old Bridge, NJ | The Bushwick Glass Works was incorporated as Brookfield Glass Co. in April 1898. | |
| Brookfield Glass Co. | 1898-1906 | Brooklyn, NY | The old Bushwick (Brooklyn) plant was closed in 1906. | |
| Brooklyn Wireless and Electrical Novelty Co. | c. 1910 | Brooklyn, NY | Radio supplies, Electrose antenna strain insulators | |
| Brooks (David) | 1880's-? | Philadelphia, PA | Patented metal incased glass cup and ramshorn. Address was 22 South 21st St. | |
| Brown Boveri & Co. | BBC | 1980-? ? | Victor, NY | |
| Brunt & Thompson | B & T | 1895-1897 | East Liverpool, OH | Electrical porcelain. Successors of the Henry Brunt & Sons Co. |
| Brunt (G. F.) Porcelain Works | BRUNT, CINCH | 1897-1907 | East Liverpool, OH | The plant was started in 1850 to manufacture clay door knobs from local clays. Some years later it was operated under the name of Henry Brunt & Sons. In 1891, production of electrical porcelain was started and since has consisted of its entire output. The company was changed to Brunt & Thompson in 1895, and in 1897 to the G. F. Brunt Porcelain Works until it was incorporated in 1907. Brunt bought out Thompson from Brunt & Thompson |
| Brunt (G. F.) Porcelain Co. | BRUNT | 1907-?? | East Liverpool, OH | Incorporated in 1907. |
| Brunt (Henry) & Sons Co. | ?-1895 | East Liverpool, OH | The 1892 Sanborn map of East Liverpool showed the plant was located at 1st St. and S. Market St. The name was Riverside Knob Manufacturing Co. H. Brunt & Son, "manufacturers of door knobs and hard porcelain ware for electrical purposes." This was commonly called the Riverside Pottery or Riverside Knob Works. Production of electrical porcelain started in 1891. | |
| Brunt (William) Pottery Co. | 1847-1912 | East Liverpool, OH | The William Brunt Pottery was run by William Brunt from 1847-1856 with his son Henry joining him 1856-1895. It was incorporated in 1894. The plant (old Phoenix pottery) was also known as the Riverside Knob Works making door knobs and electrical porcelain. The pottery was sold after the death of William H. Brunt in early 1912 to his son, William S. Brunt, who was president of the former company. In early 1913, the pottery was leased to Taylor, Smith & Taylor China Co. of Chester, WV. The pottery made sanitary porcelain only but one source stated electrical porcelain, too. The plant was taken over in 1917 by General Porcelain Co. | |
| Brunt Porcelain Co. | 1921-1925 | Worthington (Columbus), OH | (see Brunt Tile & Porcelain Co.) Formerly the Brunt Tile and Porcelain Co., the name was changed to Brunt Porcelain Co. on March 23, 1921. The company was listed in the 1922 Journal of the American Ceramic Society under the direction of George F. Brunt. The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain specialties, tubes, cleats and was established in 1895, which refers to the Brunt & Thompson company. President, G. F. Brunt; vice-president, H. D. Clark; secretary, J. T. Herbert; treasurer and general manager, W. F. Steele. | |
| Brunt Tile and Porcelain Co. | 1914-1921 | Worthington (Columbus), OH | The company was incorporated on July 14, 1915 for the manufacture of earthen ware, etc. After G. F. Brunt sold his East Liverpool plant to General Porcelain Co. in 1911, he bought an old pottery in the suburbs of Columbus and refitted it to produce electrical porcelain. Brunt was president, H. D. Clark, vice president, J. T. Herbert, secretary, and W. F. Steale, treasurer and general manager. Production of tile ceased in 1920. The company name was changed on March 23, 1921 to Brunt Porcelain Co. The business was abandoned in 1925. Standard porcelain, cleats, tubes. | |
| Bryant Electric Co. | B. E. Co.; BRYANT; CHAPMAN; JUNIOR; K.P. | 1889-1901 | Bridgeport, CT | Electrical supplies. The company by Waldo C. Bryant in 1888 and incorporated in 1889 in Bridgeport, CT. The expanding market for switches led to the purchase of the Perkins Electric Switch Company of Hartford on December 30, 1899. The Perkins plant and employees relocated to Bridgeport. The 1901 Bryant catalog still does not mention Perkins. The 1907 catalog was a joint Bryant/Perkins catalog, and so are later catalogs. The business grew rapidly and was in need of more capital for expanding the plant and purchasing equipment. Bryant turned to George Westinghouse. On April 10, 1901, Westinghouse purchased Bryant for $875,000 with $50,000 to be paid at the signing. The final payment was made in October of 1902. Westinghouse agreed that W. C. Bryant and L. W. Eaton would stay on as directors of Bryant Electric and Perkins Switch. The agreement was confidential and the merged company was operated as a wholly owned subsidiary. The reason for downplaying the Westinghouse connection was to keep Bryant distributors, who had exclusive franchises to sell Westinghouse’s competitor’s products, from dropping the Bryant product line. |
| Buell (M. A.) | 1870's | Electrical supplies | ||
| Buller (W. W.) & Co. | 1862-1884 | London, England | "In 1842 Captain J Buller and J Devett purchased the Folly Pottery, in Bovey Tracy, Devon and started in business as the Bovey Tracy Pottery Company. Using Cornish clay and coal from Staffordshire and Somerset, they produced a wide range of ware including bed knobs and door furniture. As the business grew, it suffered increasingly from the cost of transporting coal to Devon, and so the owners decided to move the company to the Potteries to be at the centre of the pottery industry. By 1862 W W Buller & Co were trading in Joiners Square, Hanley and by 1865 the pottery had three bottle ovens. Bullers were one of the first companies to explore the new markets created by electrical power, and by 1868 they were supplying porcelain Insulators complete with Ironwork in large quantities. Many government contracts followed, and Insulators were produced for Australia, Africa, India, Canada and Hungary. Much of this earlier work was involved with telegraph Insulators, but Bullers were also able to supply Insulators for the Metropolitan Railway, for London County Council Tramways, and for many other transport systems. | |
| Hanly and Staffordshire potteries; 32 & 33 Queen Street. The 1883 Telegraphic Journal and Electrical Review (London) stated they were making the Slater Lewis self-binding (screw-top) insulator. The 1885 Electricians' Directory stated address was 32 Queen St., E. C." | ||||
| Buller, Jobson & Co., Ltd | 1885-1887 | London, England | Formed from merger of W. W. Buller & Co. and Jobson & Co. | |
| Buller & Co. | 1888-1892 | London, England | Name change from Buller Jobson & Co. In 1892 changed to Bullers Ltd. | |
| Bullers Ltd. | 1892-1959 | England | In 1883 the Buller-Harris partnership [see Buller (W. W.) & Co.] was established, and in 1890 the company became Bullers Ltd. Expansion continued, and so the Hanley site soon became inadequate. From this, the decision was taken to build a new factory at Milton, then in the countryside outside the Potteries. Work started in 1917 and the factory was fully operational by 1920. Electrical porcelain was the mainstay of both factories. This continued until 1959 when there was an agreement between Bullers Ltd and Taylor Tunnicliff to form Allied Insulators, sharing technical and sales expertise, whilst operating under there own names. In 1959, merged with Taylor, Tunicliff & Co. to become Allied Insulators Ltd. | |
| Bunnell (J. H.) & Co. | BUNNELL | 1879-1930's | New York, NY | Electrical supplies: antenna strains, wireholders, Brookfield. Address in 1895 was 76 Courtlandt Street and in 1921 was 32 Park Place. |
| Burgess & Co. | East Liverpool, OH | In 1927, their address was 209 W. Fourth St. | ||
| Burlington Glass Works | 1875-1885 | Hamilton, Ontario | By 1874 the Hamilton Glass Works had acquired the entire block surrounded by Macauley Street, James Street East, Hughson Street, and Picton Street, illustrating how successful it had become. The following year, however, some competition had developed in the form of the Burlington Glass Works. Founded by Edward Kent, this new company was located at the intersection of Burlington and MacNab Streets in Hamilton. Though the Burlington Glass Works was arguably the most prolific glass works of its day, this did not prevent it from being purchased by the Hamilton Glass Works in 1885. Though this event effectively ended competition between the two companies, in the end it was of little consequence since both glass works were bought up by the Diamond Glass Company in 1891. | |
| Bushwick Glass Works | 1864-1898 | Bushwick, NY | The company was started by William Brookfield and his father James M. Brookfield in September 1864 at Williamsburgh, NY on a portion of the property purchased from New York City Mayor Martin Kalbfleisch. It was located in the Eastern District on Grand street and corner of Morgan Ave. (former township of Williamsburgh and Bushwick, currently 18th ward of Brooklyn). 1881 business directly stated address as "Morgan Ave. Grand & Maujer. Mr. Kalbfleisch wanted to start a glass works after having much trouble obtaining carboys for acids. He sought help from William Brookfield who soon afterwards purchased the property. The business address in November 1875 was 55 Fulton St. and in May 1884 it was 45 Cliff St. In July 1889, the office moved to 83 Fulton St., room 11. | |
| Butler Hard Rubber Co. | 1880's | New York, NY | Manufacturer of hard rubber for electrical insulation and other items. Specifically mentioned "rubber hook insulators" in an 8-1884 advertisement. By 1889-1890, they were making hard rubber insulators from the 7-10 patents granted to William Kiel. Most of the patents were applied for and granted in 1889, and assigned to Kiel, Butler and Turnbull of New York City. The patents describes creating a vulcanized plastic compound by soaking wood in oil and mixing with sulfur, crude rubber, and beeswax which is then passed through rollers prior to the vulcanization process. Address in NYC was 33 Mercer St., which was two blocks from Goodyear Hard Rubber Co. at 13 Mercer St. | |
| Buyer's Reference | ||||
| Buzby (J.F.) | ||||
| C. S. Knowles Co. [see Knowles (C. S.) Co.] | ||||
| Cadiot (E. H.) & Co. | c. 1900 | France | Marketed the porcelain "Cloche Mehun" insulator. | |
| Cadiz Glass Co. | 1884-1896 | Cadiz, OH | Company was started in February 1884 and incorporation by made on May 8, 1884 by stockholders William M. Wallace, D. B. Walsh, Edward Pearson, M. G. Kennedy, W. S. Paulson, J. M. Garvin, J. M. Estep, J. M. Brown, H. S. McFadden, W. L. Houser, John Conroy, A. Quigley, and R. S. Timmons. William Wallace was granted two patents for glass screw caps (264,379 and 270,162). Production started on July 22, 1884 with McFadden as president. The first insulators were contracted for a telephone company in Nov. 1884. On May 7, 1885 it was announced that the Ohio Valley Glass Co. of Bridgeport secured control of the factory. The defunct plant was sold at a sheriff's sale in April 1896. From Dick Roller [referencing Cadiz Republican, April 15, 1886] "Cadiz Glass Co., Cadiz, OH, made shipment of insulators to Vera Cruz, Mexico last Monday. If these insulators suit the "greasers" they might organize a joint stock company and buy the glasshouse and move it there." [see article 3284] | |
| California Electrical Works | 1877-1908 | San Francisco, CA | Electrical Construction & Maintenance Co. was reorganized in June 1877 and incorporated as California Electrical Works. In May 1908 it was taken over by Western Electric Co. (see Seiler (Paul) Electrical Works) | |
| California Glass Insulator Co. | C.G.I.CO. | 1911-1916 | Long Beach, CA | The company was incorporated in May 1911 with capital stock of $300,000. The directors were Jules Kauffman, A. C. Munn, E. H. Fosdick, J. Morris, J. G. Orth, J. M. Waterman and Stanley S. Stonaker. The factory was not completed until March 1912. On January 14, 1914, the California Glass Works was incorporated with a capital stock of $150,000; subscribed $700.00. The following directors were named — J. G. Orth, John Morris, William Schade, M. L. Orcutt, Charles L. Eshelman, J. D. Taggart and Shirley Meyre. This was the same plant at Long Beach and probably operated as California Glass Insulator Co. since that was the name mentioned when it merged with Bloom Jar Co. in August 1915. |
| California Glass Works | 1882-1883 | San Francisco, CA | ||
| Cambridge Electric Light Co. | C. E. L. CO. | 1887-1892 | Cambridge, MA | Cambridge Electric Light Co.; electrical supplies; glass insulators with embossing "C. E. L. CO." |
| Canada Glass Co. | 1864-1877 | Hudson, Quebec | ||
| Canada Glass Works | FOSTER BROS. | 1854-1860 | St. Johns, Quebec | Foster Bros. |
| Canadian General Electric Co. | 111892-? | Toronto, Quebec | Manufactured various electrical equipment and supplies including porcelain nail knobs and cleats. | |
| Canadian Glass Mfg. Co. | ||||
| Canadian Line Material Co. | 1930's-1972 | Scarborough, Ontario | ||
| Canadian Northern Railway | CNR | 1892-1956 | Canada | Incorporated in 1892 and merged into Canadian National Railway in 1956. |
| Canadian Ohio Brass Co., Ltd. | 1928-?? | Niagara Falls, Ontario | Formerly The Dominion Insulator & Mfg. Co. Ltd. | |
| Canadian Pacific Railway | CPR | 1872-? | Canada | Incorporated in 1872 to build a railway across the mountains to British Columbia. |
| Canadian Porcelain Co., Ltd. | 1912-1958 | Hamilton, Ontario | Associated with Locke Insulators, Inc. The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain and pole line hardware. | |
| Canton Insulator and Clay Co. | 1896-1904 | Canton, OH | Went bankrupt | |
| Canton Porcelain Co. | 1912-1944 | Canton, OH | The company made brick 1912-1914. Insulators were made for one year in 1914, then started making children's toy clay marbles for Brown Shoe Co. and others until 1923 when they started making insulators again. Insulator production ceased in 1926. Then they made pottery for wholesaling to florists until closing in 1944. Insulator production was probably dry pressed porcelain for electrical house and building wiring. | |
| Capital Porcelain Co. | 1910's | Trenton, NJ | A 1917 Trenton newspaper listed this company with other electric porcelain companies. Company was not shown in the New Jersey list of corporations. | |
| Capital Pottery Co. | Trenton, NJ | NJ records show the company charter expired in 1896. No other information. | ||
| Carey Ohio Porcelain Co. | C. O. P.; CAREY - O.; CAREY / OHIO | 1920's | Carey, OH | Electrical porcelain. It was formed in 1920 with $60,000 investment by C. Follett, J. W. Eckelberry, W. M. Briggs, W. N. Nye, and W. P. Bauer. |
| Cartel Vidreria Monterrey | Mexico | Logo VM interlaced in a circle same as Masnieres (France) | ||
| Catalog Of Telegraphic Material & Electric Appliance | Charles T. Chester, supplies | |||
| C. E. L. Co. | C.E.L. CO. | Danvers, MA | Sold lamps produced under several GE patents. Glass insulators are know with the C.E.L. CO. embossing. | |
| Central Electric Co. | C E CO. | 1887-? | Chicago, IL | Electrical supplies |
| Central Pacific Railroad | C.P.R.R. | The C.P.R.R. along with the Union Pacific Railroad (U.P.R.R.) completed the first transcontinental link in 1869. | ||
| Central Porcelain Co. | Columbiana, OH | |||
| Central Porcelain Works | 1905-1907 | Trenton, NJ | Company was incorporated on December 21, 1905 by Fred Nightingale, Robert W. Nightingale and Edith M. Perkins for the manufacture of porcelain ware and china specialties. The works are at New York and Olden avenues, with Fred Nightingale in charge. Plant was sold in a Sheriff's sale August 28, 1907, since mortgage was held by the state for unpaid taxes in 1906. | |
| Centralab, Inc. | CRL inside a diamond | Milwaukee, WI | Radio antenna insulators | |
| Centro Vidreiro Do Norte Du Portugal, Lda. | Portugal | |||
| Century Pottery Co. | c. 1882 | Camden, NJ | Advertisement in Aug. 20, 1892 Electrical World said they produced porcelain knobs, rosettes, cut-outs, and other porcelain electrical supplies. Address was 508 to 514 Liberty St. | |
| Ceram Insulators | 2001-Feb. 2004 | Macomb, IL | Purchased from Porcelain Products Co.; company based in Vienna, Austria; plant closed (see PPC Insulators) | |
| Ceramic Allied Products, Inc. | ??-1931 | Trenton, NJ | Merged with Cook Pottery Co. in 1931. Company was not shown in the New Jersey list of corporations. (check later dates) | |
| Ceramic Electrical Co. | 1907-?? | Charleston, WV | ||
| Ceramic Specialties Co. | RACO; circle C | 1932-1955 | East Liverpool, OH | Formerly the Adamant Porcelain Co. and then the T. V. Milligan Porcelain Co. Milligan left the company in 1929 after purchasing the idle Ravenswood Porcelain Co. plant from General Porcelain Co. At that time, company name was changed to Peach Porcelain Co. In 1932, from either name change or purchase, the company became Ceramic Specialties Co. The company went bankrupt in 1955. Porcelain insulators marked RACO were made for the Raco Electrical Products Div steel bracket |
| Champion Porcelain Co. (see Jeffery Dewitt Insulator Co.) | 1915-?? | Detroit, MI | The company made porcelain spark plug insulators. | |
| Chance Co. (The) | 1905-? | Centralia, MO | The 1921 EMF Electrical Year Book said the company manufactured guy anchors, lightning arrester, wall brackets, and electric linotype pot heaters. President, A. Bishop Chance; secretary, I. L. Traughber; treasurer, J. A. Chance. | |
| Chance Co. (A. B.) | PP; PP Co. | 1956-1963 | Carey, OH | Manufacturer of dry pressed porcelain; purchased from Porcelain Products, Inc.; renamed in 1959 as Porcelain Products Co. but still owned by Chance which sold the plant in 1963 to Clarken Co. of St. Louis (still operated as PPCo.). The plant was sold in June 1963 to Clarken Co. |
| Chance Co. (A. B.) | CHANCE, C | 1956-198? | Parkersburg, WV | Manufacturer of wet process porcelain. Purchased from Porcelain Products, Inc.; CHANCE marking started 1959 |
| Charbonneaux & Cie (Charbonneaux & Company) | ISOREX | 1905-?? | Reims, France | The same as Verreries Charbonneaux, Verreries de Reims |
| Chester, Charles T. | circa 1850's-1870's | New York City, NY | Catalog of Telegraphic Material & Electric Appliance. Business was located in 1855 at White and Leonard Sts. and prior to 1866 at 104 Centre Street. John Chester died in 1871 and the business continued by Charles. A brother, Stephen Chester, was a partner in the firm Chester, Partrick & Co. of Philadelphia, which offered the same line of telegraphic goods. | |
| Chicago Fuse Mfg. Co. | C.F.W. & M.CO. | Chicago, IL | fuse cutout bases | |
| Chicago Insulating Co. | CHICAGO INSULATING CO. | 1882-? | Chicago, IL | Company was incorporated in November 1882. Bob Stahr's research: The CD 109 & 135 design wire groove was applied for patent in July 1883, and was granted July 27, 1883. Leonard Glass Works from Detroit Michigan made insulators for the Chicago Insulating Co. It is unknown what particular embossing styles. Leonard Glass Works filed suit in February 1885 to recover $8,000 owed to them by Chicago Insulating Co. A September 1887 newspaper reported in part about the lawsuit "The bill charges that the stock was never paid for and that the directors of the Insulating Company managed the affairs of that company so recklessly that it became insolvent. The court is asked to compel the stockholders of the defendant concern to pay the amount of their stock and to dissolve the corporation". It would seem that the company was bankrupt by 1887, and possibly even before the lawsuit was filed in 1885. The lawsuit between the two was dragged through the courts until at least June 1892. Insulators were produced at the Leonard Glass Works 1883-1886. |
| Chicago Steel Foundry Co. | CHICAGO | Chicago, IL | secondary rack spools | |
| Chicago Telephone Supply Co. | CTS | Chicago, IL | telephone insulators and specialties | |
| Chomel-Legrand | CL in a diamond | 1910-1958 | Fourmies, France | Manufacturer of glass insulators and bottles. |
| Cincinnati Porcelain Co. | 1920-1927 | Cincinnati, OH | Merged with Porcelain Products, Inc. The plant site was originally that of Strobl Pottery (1901-1910) and then Strobl Tile Co. (1910-1920). | |
| Circle F Mfg. Co. | Little Joe; Medium Joe; Big Joe, Jiffy | 1920's | Trenton, NJ | Manufacturers of light sockets, wiring devices and other electrical goods. Also made radio antenna insulators (Little Joe, Medium Joe, and Big Joe), cleats, strains, nail-knobs, and wall tubes. 1926 catalog (No. 9) indicated a second porcelain plant in New Brunswick, NJ. Company was not shown in the New Jersey list of corporations. (check later dates) or the 1921 EMF Electrical Year Book. The Circle F trademark was used by the E. H. Freeman Electric Co. |
| CJI Porcelain Pvt Ltd | modern | New Delhi, India | Manufacturer of porcelain insulators | |
| Clark (Latimer), Muirhead & Co. | 1870's-1880's | London, England | Telegraph contractor who name appeared on some early British brown stoneware insulators. In 1881, the address was 38 Regency St, Westminster. | |
| Clarken Co. | 1963-?? | Carey, OH | The Clarken Co. purchased the dry process porcelain plant at Carey from A. B. Chance in 1963. | |
| Cliff, Joseph & Sons | 1880's | Northampton, England | 2 & 4 Wharf | |
| Climax Porcelain Co. | 1911-1916 | Trenton, NJ | The company was incorporated on March 24, 1911 and located at New York and Olden Avenues. Agent was John C. Rittenhouse. This was the former plant purchased by Electric Porcelain Mfg. Co. in 1916. Details of the April 2, 1917 strike indicate the plant was still in operation at that time. | |
| CODARVI | Uruguay | |||
| Cohansey Glass Mfg. Co. | 1870-1900 | Bridgeton, NJ | Electrical insulators" were displayed at the Franklin Institute 1874 Awards. Type(s) are unknown. [Adeline Pepper-Glass Gaffers of New Jersey (1971), pg. 215; Alice Creswick-The Fruit Jar Works] | |
| Colonial Electric Co. | Philadelphia, PA | Electrical supplies, Hemingray | ||
| Colonial Insulator Co. | I inside a C; C. I. Co.; COLONIAL; HI HEAT | c. 1895-1950's | Akron, OH | Formerly known as the Colonial Sign Co. Maker of electrical porcelain. In 1927, their address was 943 Grant St. |
| Colonial Sign & Insulator Co. | C. S. & I. Co.; C. S. I. Co. | 1904-present | Akron, OH | The plant was located at 955 and 973 Grant St. The company was formed from the merger of Colonial Sign Co. and Akron Insulator & Marble Co. in late 1904 or possibly January 1905 (see article 8716). The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain. President, James R. Hemphill; vice-president, R. E. Armstrong; secretary and treasurer, W. H. Motz. |
| Colorado Glass Works | R. GOOD, JR.; GOOD | 1896-1899 | Denver, CO | The Valverde Glass Works was started in 1887 as the Denver Art and Plate Glass Co. The name of the plant was changed in December 1887 to the Denver Flint Glass Co. R. Good, Jr. operated (leased) the defunct Valverde Glass Works from P. C. Thompson until it burned on June 27, 1899. The plant was rebuilt as the Western Flint Glass Co. by a group of young entrepreneurs who were sons of wealthy Denver businessmen. |
| Columbian Electrical Co. | c. 1898-?? | St. Joseph, MO | Electrical supplies, standard porcelain, Brookfield insulators | |
| Columbia Insulator Co. | Oct. 1901-1902 | Akron, OH | One reference (page 12 of book Molding a Legacy) suggested the company was in business in the 1890's and made insulators at that time. It was incorporated at Columbus, by L. M. Biggs, L. E. Biggs, Charles E. Breckenridge and Jacob Seeger to make all kinds of clay and porcelain insulators. The company merged with five other Akron/Barberton area potteries [see article 1740]. | |
| Compagnie Generale de Electricite | circa 1904 | France | One of the largest manufacturers of French incandescent lamps and electric supplies of all kinds, insulators, etc. | |
| Condam Co. | Marking found on the patent model of the 1851 Goodyear patent rubber ramshorn used in the wood block patented by Moses Farmer and John Batchelder on Sept. 14, 1858. It is in the Mike Guthrie collection. | |||
| Conneaut Metal Works Co. | CONLON | Conneaut, OH | wiring devices | |
| Connecticut Electrical Mfg. Co. | Gem Co | Bridgeport, CT | wiring devices | |
| Conover Insulator Co. | 1892-circa 1901 | Cincinnati, OH | Company sold their patented knobs based on patents 479,134 and 520,412. | |
| Consolidated Wire & Assoc'd Corp. | C W & A C | Chicago, IL | Radio antenna insulators | |
| Consumers' Insulator Co. | New Lexington, O. and Glasgow, WV | |||
| Continental Rubber Works | ||||
| Cook Electric Co. | COOK; FRANK B. COOK CO. | 1900-?? | Chicago, IL | Started by Frank B. Cook. Telephone supplies, lightning arrestors, misc. The 1921 EMF Electrical Year Book said the company manufactured telephone supplies. Address was 900-910 W. Van Buren St. President and general manager, George R. Folds; vice-president, A. D. Edwards. Factories in Chicago and Zion City, IL. |
| Cook Porcelain Insulator Co. | COOK; COOK / TRENTON | early 1920's-early 1930's | Byesville, OH | Headquarters was in Cambridge, OH. In 1927, the company was listed as Cook Porcelain Insulator Corp. |
| Cook Pottery Co. | C. P. Co.; C inside a hexagon; WEDGE | 1897-1931 | Trenton, NJ | The company was incorporated on January 7, 1897 with a capitalization of $150,000 and located at 301 N. Clinton St. (Etruria Pottery). Owner was Charles Howell Cook, a prominent resident of Trenton. The pottery located on Prospect Ave. (electrical porcelain plant) was one of three potteries owned by Cook. Other companies were Etruria Pottery (North Clinton Ave.) and Crescent Pottery Co. (located on Allen near the canal; sold some time before 1907). The capitalization was increased to $500,000 on August 21, 1909. In 1927, the address was listed as Prospect St. & P. R. R. Railway. The Cook Pottery Co. made electrical porcelain and plumbing fixtures. The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain specialties, nail knobs, and cleats. Address was Prospect St. and P. & R. Ry. President and treasurer, Charles Howell Cook; secretary and general manager, Paul G. Duryea. In 1907, Cook purchased the Ford City Pottery in Ford City, PA and the Pennsylvania China Co. nearby (see article 8572). |
| Cook-Ceramic Co. | 1931-1950's? | Trenton, NJ | ||
| Cooke-Wilson Electric Supply Co. | COOKE WILSON E. S. CO. | ?? | Pittsburg, PA | Electrical supplies; U-98 probably made by Anderson Porcelain Co. |
| Cooper Power Systems | 1985-1999 | Macomb, IL | Company based in Waukesha, WI; sold plant to Porcelain Products Co. | |
| Cooperativa de Artistas de Vidrio | ||||
| Cooperativa Integral de Vidriera de Colombia | present | Colombia | Coovinal S.A. | |
| Coors Porcelain Co. | 1920-1986 | Golden, CO | The predecessor of Coors Porcelain Co. was Herold China & Pottery Co., founded in 1910. Adolph Coors, founder of the Coors Brewing Co., took over the company in 1920, and it became Coors Porcelain Co. The company made chemical porcelain. The name was changed to Coors Ceramics Co. in 1986 to reflect its emphasis on technical ceramics. Early in 1942, Adolph Coors' grandson, Bill Coors, who had joined the company in 1939, received an urgent request for ceramic insulators for a government laboratory. Other ceramics producers needed six weeks to fill the order; Coors was able to do it in a matter of days. For several months the company continued to ship the insulators, knowing nothing of what they were to be used for. Only years after the war's end did Bill Coors discover that the shipments were actually destined for the Manhattan Project laboratories in Oakridge, where the atomic bomb was developed. | |
| Coors Ceramics Co. | 1986-present | Golden, CO | Name changed from Coors Porcelain Co. in 1986. In 1992 it came under the umbrella of ACX Technologies, when ACX became an independent holding company. | |
| Corning Glass Works | PYREX; CORNING PYREX | 1875-present | Corning, NY | Maker of the "Pyrex" insulators. The great majority of Pyrex insulators for the U.S. market were made between about 1922 and 1951. A huge variety of industrial glass as well as glassware for home use has been produced by this company for well over a century. |
| Corning, Inc. | 1989-present | Corning, NY | ||
| Cornish Wire Co. | CORWICO | Williamstown, MA | Antenna kits, lead-in strips, arresters, and glass and porcelain radio strains. | |
| Courtenay & Trull | New York, NY | Listed in 1883 Berly's Electrical Directory as "insulator manufacturers" on 17 Dey St. | ||
| Coxon Electrical Porcelain Works (later Ceramic Art Co. and then Lenox) | Trenton, NJ | In 1898, products were electrical supplies. The 1900 Trenton city directory does not list this company but it does list Electric Porcelain Co. and Harry Coxon associated with it along with Jonathan Coxon. | ||
| Crescent Electric Co. | ACME | Mountain Grove, MO | Electrical supplies, rosettes, sockets, etc. The 1921 EMF Electrical Year Book said the company manufactured wiring devices. President, William M. Nelson; vice-president, James A. Douglas. | |
| Crighton, Charles Edwin | Reid Brothers was the sole licensees for Crighton's patent insulator (gb1878-0004696) for fixing wires without the use or aid of binding wire. The patent was granted on 11-29-1878. (see article 5365) | |||
| CRISA | CRISA | Mexico | ||
| Cristaleria, S.A. | Monterrey, Mexico | |||
| Cristalerias de Chile S.A. | 1945-1968 | Santiago, Chile | ||
| Cristalerias Rigolleau, S.A. | VIDART | Buenos Aires, Argentina | ||
| Cristales Mexicanos S.A. | Mexico | |||
| Crouse-Hinds Co. | CROUSE-HINDS | Syracuse, NY | outlet bushings | |
| Crown Crystal Glass Co., Ltd. | C.C.G. | 1926-?? | Sydney, Australia | In early 1926, the C. C. G. was formed by a merger of Crown Glass, Ltd. with the Australian Glass Manufacturers' Co., which owned a majority of the shares. C.C.G. merged with Australian Glass Manufacturers in 1942. In the 1940's, several other smaller glass companies were merged into C.C.G. and name was changed around 1950 to Australian Consolidated Industries. |
| Crystal Glass Co., Ltd. | 1907-?? | Sapperton, New Westminster, BC | Manufactured bottles, fruit jars, lamp chimneys, and glass insulators | |
| Crystal Porcelain Pottery Co., Ltd. | 1880's | Cobridge, Stoke-on-Trent, England | Manufacturers of insulators, shackles, element cells for batteries, etc. Also telegraphic and electrical ware, porcelain tiles and insulating slabs. The 1885 Electricians' Directory stated address was 23 Street Swithin-lane. | |
| Crystallite Products Corp. | MAYDWELL | 1927-1940 | Glendale, CA | "The company was closely associated in ownership and management with the Electrical Products Corp. (organized in late 1925) and Diamond Electrical Manufacturing Co. (recently organized) of Los Angeles. Crystalite was incorporated in 1927. They purchased a factory site 150 x 180 feet near Western Ave. and San Fernando Road. The glass factory was in a building 75 x 180 feet. They produced street lighting globes, glass letters for electric signs, glass insulators, and other glass items for the manufacture of neon signs, etc. Manufactured insulator embossed ""Maydwell"" which were made for Maydwell & Hartzell, a distributor of products for electrical utility companies. |
| " | ||||
| Cullinan Industrial Porcelain Ltd. | South Africa | |||
| Curran-Pfeiff Corp. | Metuchen, NJ | |||
| Curry-McQuilken Co. | 1908-?? | East Liverpool, OH | ||
| Cutler-Hammer Mfg. Co. | C - H | Milwaukee, WI | wiring devices, specialties | |
| Cutter Co. (George) | JUPITER | 1890's-?? | South Bend, IN | Electrical supplies, Cutter tree insulator CD 1038, arc lamp equipment and supplies. Address in July 1900 was 100 Lake Street, Chicago. |
| Cutter (Scott G.) | CUTTER | 1910-? | Oswego, IL | The 1921 EMF Electrical Year Book said the company manufactured tree insulators and test clamps and clips. Factory was in Muncie, IN. |
| Daburn | DABURN | mid-1960's-present | Northvale, NJ | Electrical porcelain for airplane, antenna, feed-thru, feeder spreader, stand-off |
| Dalian Insulator Works | ~1915-present | Dalian, China | Formerly Dalian Porcelain Insulator Works | |
| Davidson & Stevenson Porcelain Co. | D & S; D & S P Co. | 1913-1920 | Newell, WV | Standard electrical porcelain, cleats, knobs, tubes and novelties in both dry pressed and wet process porcelain. Also known to make six styles of wet process porcelain pin-type insulators. The Newell, WV factory was across the river from East Liverpool, OH. |
| Davidson Porcelain Co. | DAVIDSON; D. P. Co.; EVER READY | 1920-1936 | Newell, WV | Incorporation notice said located in Chester, WV. The incorporators were C. C. Davidson, Willis Davidson, Sarah J. Davidson, and William E. Gillis, of East Liverpool, Ohio, and W. W. Ingram of Chester. Produced wet process porcelain pin-type insulators. Company address listed as East Liverpool, OH. Made "Eveready" wing assembled porcelain split knobs (see Eveready Porcelain Co.). The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain, cleats, and split nail knobs. President and general manager, W. M. Davidson; vice-president, Richard B. Smith; secretary and treasurer, C. C. Danielson. |
| Davis, Greathead, and Green | c. 1850's | London, England | Plant was called the Flint Glass Works. Richard Green obtained patent gb1853-0003007 in 1853 for making the insulator and mounting screw all in one piece of the same material. | |
| Day (A. G.) | 1880's | New York, NY | The 1885 Electricians' Directory stated company was located at 120 Broadway with notation: "The Kerite Insulator". | |
| De Fuisseaux Freres Baudour (De Fuisseaux Brothers Baudour) [see Societe Anonyme Des Annciennes Usines De Fuisseaux, a Baudour] | Baudour, Belgium | Porcelain insulators | ||
| Delaware Hard Fibre Co. | c. 1891 | Wilmington, DE | Made insulators from hard fiber. | |
| Delta-Star | 1957-1963 | Lisbon, OH | The old Thomas plant | |
| Denver Flint Glass Co. [see Colorado Glass Works] | Denver, CO | |||
| Diamond Flint Glass Co. | 1903-1913 | Montreal, Quebec | In 1903 the Diamond Glass Company was reorganized as the Diamond Flint Glass Company in order to acquire Canadian rights to machines which mass-produced glass. What followed was a period of consolidation, the introduction of new techniques and forms, and the acquisition of more glass companies. After installing equipment for the mechanical production of glass, the Diamond Flint Glass Company reopened the Hamilton Glass Works in 1906. The newly resurrected glass plant didn't last long however since in 1912 it was destroyed by a fire. Some of the equipment was able to be salvaged and it was moved to the Dominion Glass plant, which was under construction at the time. | |
| Diamond Glass Co. | 1890-1902 | Montreal, Quebec | The Diamond Glass Company was incorporated in 1890 in Toronto but was funded by financial interests in Montreal. This company descended from various glass works starting with the opening of the St. Johns Glass Company in 1875. St. Johns became the Excelsior Glass Company in 1878, which in turn became the North American Glass Company in 1883. This was to be its final reorganization until 1890 when it became the Diamond Glass Company. Its purpose was as a vehicle for the consolidation of the Canadian glass industry. By acquiring control of numerous glass works throughout Canada (of which the Hamilton works were some of the first), the Diamond Glass Company helped to prevent foreign interests from entering into the Canadian market. In 1903 the Diamond Glass Company was reorganized as the Diamond Flint Glass Company in order to acquire Canadian rights to machines which mass-produced glass. What followed was a period of consolidation, the introduction of new techniques and forms, and the acquisition of more glass companies. | |
| Diamond Insulator Co. | circa 1901 | Mogadore, OH | Listed in 1901 Powers' Central Station Directory and Buyers' Manual as making clay insulating cleats and tubes. | |
| Diamond Porcelain Co. | 1900-1911 | Trenton, NJ | The company was incorporated on January 27, 1900 and located on Chauncey St. It manufactured specialty porcelain and was merged into General Porcelain Co. A 1907 ad said the produced "transformer tubes, catenary spools, wall tubes, spark plugs, and high tension insulators of special design and all classes of wet process porcelain, as well as pressed specialties made by the dry process." | |
| Diamonite Products Mfg. Co. | c. 1952-present | Shreve, OH | Manufacturer of products using Diamonite which is composed of about 95% alumina oxide. It was referred to as "wear-resistant polycrystalline alumina". Pin-type insulators were first reported in the early 1970's made of Diamonite which were coated with Teflon. Insulators are nearly indestructible and are 2-3 times as dense as typical porcelain. The Diamonite Products Mfg. Co. was owned by W. R. Grace & Co. and sold in July 1994 to Ferro Corp. Apparently Ferro reorganized the Shreve plant in 2003 and operates it as CerCo, LLC See patents 5,053,370 and 5,164,345 granted in 1991-2. | |
| Dirigo | Composition insulators | |||
| Dixie Electrical Mfg. Co. | ||||
| Dominion Glass Co., Ltd. | DOMINION; D in a diamond | 1913-1967 | Wallaceburg (Hamilton), Ontario | The Dominion Glass Company was founded in 1912 by the amalgamation of the Diamond Flint Glass Company and the Sydenham Glass Company (of Wallaceburg, Ontario). Production commenced in 1914 once the company had finished construction of its Chapple Street plant. In the 1920's, hand-blowing shops were replaced by a full line of automatic machines (which were subsequently discarded in 1940 with the arrival of new bottle-making equipment). In 1924 an addition was built in the form of a $40,000 building consisting of a machine shop and a stamping room. Though the plant had two furnaces initially, by 1958 a third was added along with a colour tank for making green and amber glass. A decade later the company was expanding again with the start of a $4.25 million modernization project at its Hamilton and Wallaceburg plants. $2 million was spent expanding the glass furnaces and their related production facilities at the Hamilton plant, while $2.25 million was spent constructing new plant facilities and rebuilding the glass furnace at the Wallaceburg plant. Both plants installed final process electronic equipment to detect and reject imperfect bottles. These improvements boosted production at the Hamilton plant to 22 million bottles per year. In 1969, $8 million was spent on improving efficiency to help offset rising labor costs. |
| Dominion Insulator & Mfg. Co. Ltd. | 1922-1928 | Niagara Falls, Ontario | Name changed to Canadian Ohio Brass Co. | |
| Doulton & Co. | 1853-?? | London, England | John Doulton (1793-1873) was a journeyman potter having served his apprenticeship as a thrower in a pottery at Fulham, south east London. At the age of 22 in 1815, he invested his life savings to become a partner in the firm owned by the widow, Martha Jones, together with John Watts, who was a foreman at the same pottery. Following Martha's retirement in 1820, the new company was trading by 1826 as Doulton & Watts from premises in the High Street, Lambeth. Doulton & Watts followed the practice of many local potteries at that time in manufacturing salt-glazed stoneware storage and drinking vessels. Many of these containers are still available with their familiar sand colour, some embellished with relief figures and often with an embossed mark on the base. As the company developed and expanded it diversified into the manufacture of architectural terracotta wares such as chimney pots, roof tiles and garden ornaments. It also manufactured acid-resistant stoneware chemical vessels for the chemical industry. John Doulton had eight children, but it was his second son, Henry Doulton (1820-97), who became the driving force in the family business and is widely credited for bringing the company to pre-eminence. Five brothers worked in the company, but it was Henry's driving force through experimentation with glazing techniques that resulted in their greatest achievements. Henry Doulton served an apprenticeship and learned all aspects of the pottery trade. As with many Victorians he studied chemistry and physics in his spare time and this stood him in good stead for developing new glazes for the Lambeth pottery. Population growth during the 19th century coupled with the lack of efficient sanitation caused outbreaks of disease throughout all levels of the population. Reformers around the middle of the century advocated the use of glazed stoneware pipes for sewerage and house drains. Much of these probably exist to this day. The ever enterprising Henry persuaded his father and a younger brother to invest in a separate company in 1846 to produce these items and so Henry Doulton and Company started trading in Lambeth High Street. Such was the demand for these products that further pipe factories were opened in Lancashire and the West Midlands. Further diversification was into sanitary ware items including a stoneware water closet. The world's first glazed ceramic kitchen sink was developed and this side of the business grew rapidly. The first major display of Doulton wares was at the Great Exhibition in Hyde Park in 1851. Doulton and Watts showed their ceramic equipment for the chemical industry and the water filters containing purifying blocks of carbon, often in very ornate and decorative styles. Many other items were displayed including industrial ceramics such as insulators for the bourgeoning electrical power industry. John Watts retired in 1853 and Henry Doulton & Company merged with Doulton and Watts to form a single trading company to be known as Doulton & Company. Lambeth Pottery London, S. E. and Burslem, Staffordshire. Manufacturer of accumulators, porous cells, battery jars, insulators in stoneware and white earthenware, knobs for tops of street lamps, caps for telegraph posts, porous plates (round and square), pipes with ground joints for preservation of electric wires underground, Slater Lewis's patent self-binding insulators, crucibles and general chemical ware. Awarded only metal at the International Electric Exhibition, London, 1882. Contractors to the Postmaster-General and Indian Government. (J. A. Berly's British, American and Continental Electrical Directory and Advertiser, 1883). The 1883 Telegraphic Journal and Electrical Review (London) stated they were making the Slater Lewis self-binding (screw-top) insulator. | |
| Doulton Insulators Australia Pty. Ltd. | 1956-?? | DIA | ||
| Doulton Insulators Ltd. | DOULTON | 1900-?? | London, England | See A I Industrial Products Ltd. Doulton Insulators division |
| Duck (J. J.) Co. | ||||
| Dunham, Carrigan & Hayden Co. | Early 1900's | San Francisco, CA | ||
| Duquesne Glass Co. | DUQUESNE GLASS CO. | 1905-1907 | Carneige, PA | There has been alot of uncertainty concerning the true source of the insulators embossed "DUQUESNE GLASS CO." Three types are known, all small telephone line styles: CD 106.1, CD 106.3, and CD 113.2. According to information uncovered by researcher Bob Stahr, the actual source of these insulators was the above-mentioned firm, located in Carnegie, PA, now a part of metropolitan Pittsburgh. The Duquesne Glass Company was incorporated in January of 1905, and was in operation for approximately two years. The glass was manufactured at a plant owned by the H. L. Dixon Company. In May of 1907 the plant itself was sold by Dixon to Superior Steel Company, and Superior gained occupancy in November of that year. Another glass factory with the same name (i.e. Duquesne Glass Company) was located in Paden City, West Virginia, and was in business from about 1903 (some sources state 1905) to c. 1919. That operation was principally a bottle house, and did not produce insulators. On a related note, information that has circulated for long within the insulator-collecting world had mistakenly attributed these insulators to a much earlier factory called the Duquesne Glass Works (note "WORKS" in name) of Belle Vernon, PA, which operated under various owners from about 1834 to 1886 or later. |
| Duquesne Glass Works | 1834-1886+ | Belle Vernon, PA | Duquesne marked insulator probably were not made by this company, but rather an unknown company | |
| E. Wormser & Co. | c. 1854-1875 | Pittsburg, PA | ||
| Eagle Electric Mfg. Co. | EAGLE | Long Island City, NY | Radio antennae insulators. | |
| Eagle Porcelain Co. | prior to 1930 | Located at Princeton and Chadwick Avenues | ||
| Eagle Pottery Co. | 1876-1898 | Trenton, NJ | The Eagle Pottery was erected in 1876 by Richard Millington. In 1879 the pottery was purchased by Burroughs & Mountford Co. Later the owner was S. & W. Baggott. The defunct plant was purchased in 1899 by James Tams, owner of Greenwood Pottery and Greenwood China Co. NJ records show company defunct in 1902. In 1917, the Trenton Potteries Co. purchased the old Eagle Pottery from Greenwood China Co. | |
| East End Pottery Co. | E. E. P. Co. | 1894-1903; 1905-1910 | East Liverpool, OH | The company was founded by S. Turnbull, J. Doekin, E. J. Owen, and Gus A. Trenle. Located on the north side of Railroad St. east of Boyce St. The East End Pottery Co. was started in 1894 on this site. Name changed to East Liverpool Potteries Co. in 1903 and then East End Pottery Co. in 1905. Later became East End China Co., Trenle China Co. and then refitted in 1917 as the Trenle Porcelain Co. to produce electrical porcelain. Cleats with marking E. E. P. Co. were probably the first electrical porcelain made at this plant. |
| East Liverpool Electrical Porcelain Co. | E | 1901-1911 | East Liverpool, OH | Known as "Electrical Porcelain Co." and "Electric Porcelain Co." |
| Edison General Electric Co. | circa 1890 | New York, NY | Electrical supplies located at 292 Avenue B | |
| Edison Storage Battery Co. | BSCO; EDISON | West Orange, NJ | wet batteries | |
| Edmonton Dunvegan & British Columbian Railway | EDR | 1906-1929 | Canada | Incorporated in 1906. CPR managed the railway from 1920-1926. Company was sold to the CPR and CNR in 1929 and is now the Northern Alberta Railway. |
| Edwin Lewis Co. | E. L. CO. | circa 1900 | Boston, MA | Electrical supplies; may have sold glass insulators with embossing "E. L. CO." |
| Efficiency Electric Co. (The) | EFFICIENCY | East Liverpool, OH | porcelain cleats | |
| E. I. V. (see SEDIVER) | ||||
| Electric Appliance Co. | I T | 1891-? | Chicago, San Fran., Dallas, New Orleans | Electrical supplies, Hemingray, Brunt standard porcelain, Fred Locke porcelain and glass |
| Electric Cable Construction and Maintenance Co. | Philadelphia, PA | David Brooks, Jr. assigned his patent (383,097) to this company. | ||
| Electric Engineering & Supply Co. | E. E. & S. Co. | 1890-c. late 1897 | Syracuse, NY | Supplier of various electrical light sockets, switches, rosettes, fuse holders, and railway supplies. The company was located at 308-310 W. Jefferson St. They had a close association with P & S which probably made the porcelain article they used in their assembled products. Jesse L. Hinds first socket patent filed in 1891 was assigned 1/2 to EE&Sco. |
| Electric Fusegard Co. | FUSEGUARD | Newark, NJ | fuse cutouts | |
| Electric Good Mfg. Co. | Maine | Patented knob | ||
| Electric Heat Alarm Co. | SIMPLEST | Boston, MA | In 1895, this company marketed the "Simplest" cleat patented by L. H. Desisles. (see patent 539,040) | |
| Electric Insulator Co. | Clarksburg, WV | |||
| Electric Ordnance Accessories Co. Ltd. | 1916-1928 | Hanley, Stoke-on-Trent, England | ||
| Electric Porcelain & Mfg. Co. | 1895-1920's | Trenton, NJ | Company was incorporated on April 25, 1895, by David Crossley, F. F. and J. L. Waechter, and Carl F. Adam. They manufactured dry pressed porcelain insulators and credited with the first single-fired electrical porcelain items. David Crossley, president of the Crossley Machine Company in Trenton, feeling that the electrical porcelain industry presented a very large field and unlimited opportunities, started experimenting with different articles, bodies and glazes in 1890-91. His samples were fired by the different potters in Trenton. Experiments being constantly retarded by waiting for the return of his samples, a delay of two weeks being customary, Mr. Crossley became discouraged with his arrangement and decided to try glazing an unfired piece just to see what might happen to it during firing. Lo and behold! The piece on coming from the kiln could not be distinguished from his twice-fired samples. Realizing that he had discovered a method of making electrical porcelain at a greatly reduced cost and by a much quicker process, he erected a small test kiln in the cellar of his home and continued his experiments with the once-fire process for two or three years, thus perfecting his formulas before starting the company in 1895. Address was 309-315 Monmouth St. and State St. In 1897, after dropping Imperial Porcelain Works as a supplier of his insulators, Fred Locke had various styles made here. Most were marked with under-glaze ink markings with Fred Locke's name and patent dates. In 1916, the plant moved to the plant on New York Ave., which was the former plant owned by the Climax Pottery Co. At this time H. T. Paiste, of Philadelphia, was president, H. S. Yearsley was treasurer, and Fred Whitehead was superintendent. In 1927, the company was listed in the McGraw-Hill Electrical Trade Catalog. In 1923, Henry T. Paiste was president. | |
| Electric Porcelain Co. [see East Liverpool Electrical Porcelain Co.] | 1901-1911 | East Liverpool, OH | Known as "Electric Porcelain Co." and "East Liverpool Electrical Porcelain Co." | |
| Electric (The) Porcelain Co. | 1916-? | East Liverpool, OH | The Electric Porcelain Co. was incorporated on May 29, 1916. | |
| Electric Railway Equipment Co. | EL RE CO; E. R. E. | 1920's | Cincinnati, OH | Electrical supplies. Address 201 Cormany Ave. Factories in Cincinnati and West Wheeling, OH. |
| Electric Service Supplies Co. | E.S.S.Co. | 1906-1920's? | Philadelphia, PA | Jobber, electrical supplies, and sole outlet for Franklin Porcelain insulators. The 1921 EMF Electrical Year Book said the company manufactured electric railway equipment and supplies. President, Charles J. Mayer; vice-president, J. W. Porter; vice-president and treasurer, A. H. Englund. (See Mayer & Englund) |
| Electric Storage Battery Co. | 1888-? | Philadelphia, PA | Manufacturer of electric storage batteries and battery parts. Made the Chloride Accumulator battery insulator. | |
| Electric Supply & Equipment Co., Inc. | electrical supplies | |||
| Electrical Construction & Maintenance Co. [see Pacific Glass Works] | E.C. & M.CO.S.F. | 1870-1877 | San Francisco, CA | Company was organized on December 23, 1870. Company had the CD 123 insulator produced for use on the telegraph lines they built. The company was reorganized as the California Electrical Works. |
| Electrical Development & Machine Co. | FRANKLIN | Philadelphia, PA | high-tension specialties | |
| Electrical Engineers Equipment Co. | E E E; E E & S Co. | Chicago, IL | high-tension electrical equipment | |
| Electrical Glass Corp. | Dec. 1889 to Nov. 1890 | Sandwich, MA | Plant owned by James Pennycuick but was unsuccessful making insulators there using his 1885 patent. Most insulators were made at Sandwich Cooperative Glass Co. and some embossed with Diamond P. | |
| Electrical Insulator Mfg. Co. | Sept. 1906 | Barberton, OH | A. L. Dyke tried to take over the Barberton Pottery Co. using this name but failed [5876; 5962; 5963] | |
| Electrical Insulator Mfg. Co. | 1880's | England | The 1885 Electricians' Directory stated company were insulator makers located at 31 Lombard Street, E. C. | |
| Electrical (The) Insulator Mfg. Co., Ltd. | 1880's | London, England | The office was located at 31 Lombard St. | |
| Electrical Mfg. Co. | E. M.; E. M. Co. | Battle Creek, MI | wireholders | |
| Electrical Porcelain Co. | E. P. Co. | 1901-1911 | East Liverpool, OH | Merged into General Porcelain Co. |
| Electrical Porcelain and Manufacturing Co. | 1903-? | Trenton, NJ | There may be confusion with Electric Porcelain & Mfg. Co., but this company was listed in 1909 "History of Clay-Working Industry in the U.S." | |
| Electrical Specialty Mfg. Co. | BOSS | Providence, RI | cleats, outlet bushings | |
| Electrical Supply & Equipment Co. | New York & Pennsylvania | Electrical supplies, Hemingray, Illinois Electric, Pittsburg, standard porcelain | ||
| Electrical Supply Co. | 1880's-1890's | Chicago, IL | Electrical supplies company located on corner of Randolph St. and Michigan Ave. Showed the Fluid Insulator in their 1892 catalog. | |
| Electro Importing Co. | EICO | New York, NY | Radio antenna insulators | |
| Electrose Mfg. Co. | ELECTROSE; ARCOVER | 1893-1920's | Brooklyn, NY | Insulators made from the composition called "Electrose". The 1921 EMF Electrical Year Book said the company manufactured high-tension bushings, insulators, insulating compounds and materials. President, Louis Steinberger. |
| Electrovidro, S.A. | 1980's? | San Paulo, Brazil | From purchase of VIFOSA by Sediver | |
| Elekroporcelan Louny | EPL | 1957-present | Louny, Czech Republic | |
| Ellenville Glass Works | 1837-1896 | Ellenville, NY | The Ellenville Glass Company was established in 1836 near the D&H Canal by a group of glassmakers from Connecticut. In October 1837 the company started making bottles using as much as 10,000 cords of wood yearly. In 1859 they switched to coal. Business suffered during the Civil War and resulted in a reorganization in 1866 under the name of Ellenville Glass Works. The company produced green and amber bottles, fruit jars, insulators for telegraph poles, glass canes, paperweights and ornamental objects called "whimsies" as well as carboys and demijohns. In 1871 the glass works covered twelve acres of ground and had an outlet store in New York City, but was knocked out by the depression of 1873, foreclosed and, in 1882, its property was finally sold to Charles A. Edwards. A new company, the Ellenville Glass Factory, was organized, in which many of the glass blowers bought shares. In 1886, they started making white glass for insulators and fruit jars, with silica ground from Shawangunk Creek. Business declined causing the company to end operations in 1896. No known insulator specimens have been identified. | |
| Elliot-Lewis Electrical Co. | Philadelphia, PA | Electrical supplies, Hemingray | ||
| Elm City Engineering Co. | H & M | East Liverpool, OH | specialties | |
| Elmer Glass Co. | 1904-?? | Elmer, NJ | Formed with the purchase of the Novelty Glass Co. | |
| EMF Electrical Year Book | Chicago, IL | Electrical directory of companies | ||
| Empire China Works | 1867-?? | Greenpoint, NY | The company was started in 1867 by James L. Jensen making hardware trimmings and table ware. It started making electrical porcelain in plaster molds as early as 1879 for Waldo Bryant Electric Co. According to an early history written by Watts, they were credited to making the first electrical porcelain in the U. S. The plant was located from 144 to 156 Greene street (and Union St.), near Manhattan avenue in Greenpoint (Brooklyn) covering a space 175 feet by 100. In 1893, the plant was still owned by J. L. Jensen. (see article 4870). Empire China Works was still in business in 1919 and no reference past that date could be found. | |
| Empire City Electric Co. | 1880's | New York, NY | Electrical supplies, glass insulators, standard porcelain | |
| Erie Electrical Equip. Co. | ERIE | 1920's? | Johnstown, PA | Electrical supplies for switchboards, porcelain cleats and specialties. |
| Erner Electric Co. | Cleveland, OH | Electrical supplies (Hemingray, standard porcelain) | ||
| Esperanza, S.A. | Segovia, Spain | |||
| Etruria Pottery Co. | 1863-1881 | Trenton, NJ | This plant was built in 1863 by the Ott & Brewer Co. Owners were Messrs. Bloor, Ott & Booth with John Hart Brewer as president in 1865. Manufactured granite and pottery ware. Ownership was succeeded by Bloor, Ott and Brewer in 1864 shortly followed by Ott and Brown. Egg-shell china production started in 1882 with help from English potters. NJ records show Etruria Pottery Co. was dissolved on December 12, 1881. In 1882, proprietors were Ott & Brewer (Hart J. Brewer) and located on Clinton near BDRR. Later purchased by Charles H. Cook. Confirmed (Feb. 1904) maker of porcelain wall tubes from two to sixty inches long. (see Cook Pottery Co.) | |
| Ette Investment Co. | ~1900-1920 | St. Louis, MO | Line equipment. Apparently taken over in 1920 by the St. Louis Malleable Casting Co. at 7701 N. Conduit Ave. in St. Louis. | |
| Eveready Porcelain Co. | This was the sales name for split knobs made by Davidson Porcelain Co. | |||
| Excelsior Glass Co. | 1878-1883 | Montreal, Quebec | See Foster Brothers Glass Co. In 1883 the name was changed to North American Glass Co. | |
| Fairmount Electric & Mfg. Co. | FAIRMOUNT | Philadelphia, PA | wiring devices | |
| FALL RIVER POLICE SIGNAL | Fall River, MA | Embossing found on CD 134 and CD 133 has embossing "CITY FIRE ALARM" | ||
| FAPA, S.A. | Argentina | |||
| Federal Electric Co. | F. E. Co.; FEDERAL | Chicago, IL | porcelain bushings and wiring devices | |
| Federal Porcelain Co. | FEDCO | 1917-1927 | Carey, OH | Company was incorporated on January 31, 1917 to manufacture porcelain products. Merged into Porcelain Products Inc. in 1927. The 1921 EMF Electrical Year Book said the company manufactured electrical and special porcelain products. President, E. C. Edwards; treasurer, C. G. Spencer; general manager, R. G. Spencer. |
| Fernado C. Mesa Co. | F. C. M. | Irvington, NJ | wiring devices | |
| FG; VEDOVELLI, PRIESTLEY & Cie, Ateliers de constructions electriques, (Electricbuilding workrooms) | c. 1900 | Ivry / Seine, near Paris | Radio-strains, named "maillons" | |
| Fidenza Isolatori | 1928-present | Fidenza, Italy | Owned by Sediver | |
| Fidenza S.A. | 1940's-?? | Fidenza, Italy | ||
| Fidenza Vetraria S.A. | Fidenza, Italy | |||
| FIL | Italy | |||
| Findlay Electric Porcelain Co. (The) | BUCKEYE; F; F in a diamond; F in a circle; F E P Co; FINDLAY | 1910-1927 | Findlay, OH | Initially plant was leased from the U. S. Electric Porcelain Co.; merged into General Porcelain Co. The 1921 EMF Electrical Year Book said the company manufactured porcelain bushings, cleats, knobs, etc. President, J. E. Bickwell; secretary, F. E. Owen. |
| Fleron (M. M.) & Sons | FLERON | Trenton, NJ | Radio antenna insulators | |
| Fletcher (J. R.) Mfg. Co. | FLETCHER | 1920's | Dayton, OH | Manufacturer of pole line hardware, etc. Address was 302 E. Second and Canal St. Owner was John R. Fletcher. |
| Florenz | Australia | |||
| Fobes Supply Co. | Portland, OR; Seattle, WA; San Francisco; Oakland, CA | Electrical supplies | ||
| Folembray (Verreries de) [Glassworks of Folembray] | FOLEMBRAY | 1899-1954 | Folembray, France | |
| Fort (Louis) Mfg. Co. | LF or LF in a circle | Jersey City, NJ | clamp insulators | |
| Fort Wayne Electric Works | FORT WAYNE ELECTRIC WORKS | Fort Wayne, IN | primary fuse cutouts | |
| Foster Brothers Glass Co. | c. 1857-1878 | Montreal, Quebec | The Foster brothers immigrated to St. John in 1855. In 1878, the glass house was sold and apparently moved to Montreal where it is understood the plant is part of the present Dominion Glass Co. It was known as Excelsior Glass Company (1878-1883), later as North American Glass Company (1883-1891), and then the Diamond Glass Company was formed in 1891. In 1902 the name was changed to Diamond Flint Glass Co. and (by this time a conglomerate of several glass plants) it then merged into the Dominion Glass Company in 1913. | |
| Fowler Brothers Potteries | mid-1930's- | Sydney, Australia | Or Robert Fowler Ltd. | |
| Fowler Insulator Syndicate, Ltd | 1891-? | London, England | The Fowler Insulator Syndicate, Ltd was founded by Richard Hewlett. Reference from May 15, 1891 issue of The Electrical Engineer, page 403. They produced earthenware insulators according to the Powerhouse Museum in Sydney, Australia. Reference was found that R.F.Fowler and Fowler Ltd. (Sydney) produced porcelain insulators. | |
| Fralick (S. R.) & Co. | KWIKON | Chicago, IL | wiring devices | |
| Frank C. Teal Co. | ||||
| Frank H. Stewart Electric Co. | Philadelphia, PA | Electrical supplies, tubes, Thomas and Brunt standard porcelain, Murdock knobs, Brookfield, Thomas pintypes | ||
| Frank Ridlon Co. | early 1900's | Boston, MA | Electrical supplies, trolley hangers, wood strains, composition feeder wire insulators, Hawken tree insulator, Jumbo and other glass insulators, Brodie tree insulators | |
| Franklin Porcelain Co. | early 1920's-1929 | Norristown, PA | Insulators sold by E.S.S.Co. | |
| Fred M. Locke | 1893-1902 | Victor, NY | see Locke (Fred M.) | |
| Freeman (E. H.) Electric Co. | CIRCLE F; FIVE HUNDRED | 1904-1920's?? | Trenton, NJ | Company was incorporated on March 23, 1904. The principal office and place of business will be at 100 Hamilton avenue. The capital stock was placed at $25,000 and increased to $250,000 on September 22, 1908. In 1921, the officers were Edgar H. Freeman (president), George E. Maguire (sec-treas) and P. T. Bradley (sales manager). This agrees exactly with the officers of Trenton Porcelain Co. The address in the 1921 EMF Electrical Year Book was 803 E. State St., Trenton, NJ. This is the same address as Trenton Porcelain Co. in the same book. They used the tradename "Circle F". |
| Fry (H. C.) Glass Co. | 1901-1933 | Rochester, PA | Company was formed by H. C. Fry. Fry Glass made (at least) 5 different types of glass insulators that are known so far (4 pintypes) and all are unique styles and very rare. Most known examples were recovered from the factory dumpsite. Colors included opaque cobalt, milky opalescent, dark purple blackglass, etc. The actual manufacture of these insulators occurred in the 1920s. | |
| Fukagawa Porcelain | Koran | Arita, Japan | The company was founded in 1875 in Arita near Nagasaki as a family business. Their rich history includes work as purveyor to the Japanese Imperial Family since 1910. In 1895 Ezaiemon Fukagawa founded a company 'Koransha' and started to produce porcelain for export to Europe and America. They have been making insulators since at least 1879. They made some of the first insulators used on the island to replace the "Varley double cup earthenware" insulators used on the original telegraph lines, which are still located in Western Japan today. | |
| Fuller & Son | Bow, England | British patents in 1867 and 1877 | ||
| Gager (Oliver A.) & Co. | circa 1851-1853 | Bennington, VT | See U. S. Pottery Co. for more details. Oliver A. Gager, a New York china merchant, became involved with Christopher Fenton around 1850. He apparently sold Fenton's Flint ware. Then in 1853, he formed a company with Fenton and others known as the U. S. Pottery Co., which is know to have made the Elliott Flint insulators. It is likely that the insulators were first made by O. A. Gager & Co. | |
| Gamewell Co. | GAMEWELL | Newton Upper Falls, MA | signaling systems | |
| Gaskell and Grocett | 1870-1969 | Stoke-on-Trent, England | ||
| Gaynor Electric Co. | Louisville, KY | Thomas F. Gaynor was granted patent 437,685 on October 7, 1890 for a color-coded glass insulator in order to distinguish it from other lines on a crossarm or pole. | ||
| Gayner Glass Works | GAYNER | 1898-1957 | Salem, NJ | In 1874, John Gayner, Sr. was located at Waterford, N. J., where he became a member of a firm, his partner being S. J. Pardessus, of New York City. July, 1879, the firm of Gayner & Pardessus moved their business to Salem and at first employed only about seven men. The firm was dissolved when the sons of Mr. Gayner became partners in the business. The company was incorporated on December 8, 1898 in Salem, NJ by John Gayner, Edward J. Gayner, and J. William Gayner. John Gayner, Sr. died on October 20, 1925 at the age of 94. (see ID 7580) A fire in May 1926 destroyed the large warehouse. The 1921 EMF Electrical Year Book said the company manufactured battery jars and was established in 1874. President, John Gayner; vice-president, J. William Gayner; treasurer and general manager, E. J. Gayner; secretary, John M. Gayner. Factories were in Salem, NJ and Bridgeton, NJ. Insulators were evidently only produced during the period of 1920 to 1923. Most of the insulators they made are embossed "GAYNER" on the skirt area. Their main line of glass products consisted of various kinds of bottles and fruit jars. |
| General Ceramics Co. | 1940's-?? | Steatite insulators | ||
| General Bakelite Co. | 1920's | New York, NY | The 1921 EMF Electrical Year Book said the company manufactured Bakelite and Bakelite products. President, Dr. L. H. Baekeland; vice-president and treasurer, W. A Hamann; secretary, Philip Schleussner. Address was 2 Rector St. | |
| General Electric Co. | G. E. Co.; STANDARD | 1892-1897? | Schenectady, NY | General Electric produced early dry pressed porcelain (U-701, U-744, U-935A). Their catalogs furnished electrical supplies, Star glass insulators, Brookfield, standard porcelain, tubes, Locke porcelain and glass insulators. (see Weber Electric Co.) |
| General Electric Porcelain Co. | East Liverpool, OH | Plant leased by General Electric and run by T. F. Anderson. The plant is known to have produced standard electrical porcelain in the early 1920's. | ||
| General Porcelain Co. | GEE PEE; G. P. Co. | 1911-1927 | Parkersburg, WV | Initial mergers in 1911 included Anderson Electric Porcelain Co., G. F. Brunt Porcelain Co., Electrical Porcelain Co., and Ohio Porcelain Co. at East Liverpool, OH, U.S. Electric Porcelain Co. in New Cumberland, WV, and Findlay, OH and three plants in Trenton, NJ of Sun Porcelain Co., Diamond Porcelain Co. and one unknown. |
| General Post Office | GPO | 1912-present | England | Post office in England controlled all communications by telephone and telegraph using insulators made with the marking GPO. |
| General Radio Co. | 1920's | Cambridge, MA | The 1921 EMF Electrical Year Book said the company manufactured radio apparatus, antenna supplies, radio antenna insulators. Address was 11 Windsor St. President, Melville Eastham; vice-president, E. H. Locke; treasurer, H. S. Shaw, Jr. | |
| Gijon Fabril, S.A. | Spain | |||
| Gillette-Vibber Co. | GEE - VEE | New London, CT | end outlet bushings | |
| Gladding Ceramic Insulator Co., Inc. | 1963-?? | San Jose, CA | ||
| Glasforms, Inc. | ??-present | San Jose, CA | Manufacturer of insulators including electrical insulators & strain insulators. Materials include glass, carbon, exotic fibers, hybrids & epoxy resins. | |
| Glass Insulators Ltd. | South Africa | |||
| Gleason (E. P.) Mfg. Co. | New York, NY | Electrical supplies; Located on 20 W. Houston St. | ||
| Gleason-Tiebout Glass Co. | 1903-?? | Maspeth (near Brooklyn), NY | The 1921 EMF Electrical Year Book said the company manufactured globes for arc lamps and street lamps. Also manufacturer of glass insulators, novelties, etc. Address 99 Commercial St. with factories in Brooklyn and Maspeth, Long Island, NY. President, M. W. Gleason; secretary and treasurer, C. H. Tiebout, Jr. | |
| Globe Porcelain Co. | GLOBE | 1913-? | Trenton, NJ | The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain specialties. Address was 127 Mulberry St. President, Joseph Steinert; secretary and treasurer, Morris Steinert. (see Globe Pottery Co.) |
| Globe Pottery Co. | 1901-1907 | Bordentown (Trenton), NJ | The company was organized in February 1901. Bordentown is a suburb of Trenton. This plant was the successor to the old Ironsides Pottery Co. The Bordentown plant closed in 1907. NJ records show the company charter was no longer in force in 1910. Not sure if they made insulators. Not sure if this was later opened as the Globe Porcelain Co. | |
| Globe Pottery Co. | 1888-1902 | East Liverpool, OH | Company was incorporated in 1888, but began in 1881 under the name Frederick, Shenkle, Allen & Co. An article dated February 26, 1891 said there was a Globe Pottery Co. in East Liverpool with N. A. Frederick as president that was flooded. Company was dissolved on August 6, 1902. Also, the book, The Pottery and Porcelain of the U. S., stated it was in East Liverpool. That plant only made Rockingham and yellow ware and semi-porcelain. No insulators. | |
| Good (Robert), Jr. | GOOD, R. GOOD, JR. | Denver, CO | See Colorado Glass Works | |
| Goodrich Hard Rubber Co. | 1851-1890's | Akron, OH | An 1889 advertisement said hard rubber goods for electrical purposes and subsidary of the B. F. Goodrich Co. | |
| Goodyear, Nelson | 1850's | Nelson Goodyear was granted patent 8,075 on May 6, 1851 for a process to vulcanize rubber. It was used for various rubber insulators, particularly the ramshorn, which often bears the Goodyear name and patent date. | ||
| Goodyear Hard Rubber Co. | 1851-1890's | New York, NY | The address in NYC was 9, 11, and 13 Mercer St. Advertisement from 1893 said "molded work a specialty". A branch company advertised together at the same address was the India Rubber Comb Co. | |
| Goodyear Vulcanite Co. | 1890's | New York, NY | Address in NYC was 353 Broadway. The factory was in Morrisville, PA. It made hard rubber goods for electrical purposes such as battery cells, sheet, rod, and tubing. | |
| Gordon Electric Mfg. Co. | GORDON | Waterville, CT | switches, receptacles, etc. | |
| Gould Storage Battery Co. | New York, NY | Battery supplies and battery rest insulator. Address was 30 E. 42nd St. President, Charles A. Gould; vice-president and general manager, William S. Gould; secretary, Charles A. Gould, Jr. | ||
| Gould, Inc. | 1976-1980 | Victor, NY | ||
| Grand Trunk Pacific Telegraph Co. | GTP; GTP TEL CO | 1906-1928 | Canada | The Grand Trunk Railway was incorporated in 1852. It started to build westward in 1902-03. Operations were turned over in 1919 to The Canadian Government Railway and in 1923 became part of the Canadian National. The Grand Trunk Pacific Telegraph Co. operated independently of the railway. It was incorporated in 1906 and merged with the Canadian National Telegraph in 1928. |
| Gray and Hemingray | 1848-1856 | Cincinnati, OH and Covington, KY | Ralph Gray and Robert Hemingray leased a lot on Mayor’s Alley in Cincinnati on 5 April 1848, and began a business known as the Gray & Hemingray Glass Works. Four years later, they purchased a small parcel of land in Covington near the intersection of Second Street and Madison Avenue in 1852 on which they constructed manufacturing facilities for the glass works. The sales room remained on Hammond street in Cincinnati. The first name change was witnessed in 1856 when the glass works became Gray, Hemingray & Bros. to recognize their brothers, Anthony Gray and Samuel J. Hemingray. | |
| Gray, Hemingray & Bros. | 1857-1860 | Covington, KY | The Gray & Hemingray Glass Works was changed to Gray, Hemingray & Bros. to recognize their brothers, Anthony Gray and Samuel J. Hemingray. Note that neither Anthony nor Samuel became actual partners in the business at that time. | |
| Gray, Hemingray & Bro. | 1861-1863 | Covington, KY | Anthony Gray chose to terminate his employment with the company sometime during 1861, apparently because of health problems. He was a glass blower, an occupation that was particularly wearing on an individual. The name of the glass works became Gray, Hemingray & Bro. upon Anthony’s departure. Anthony died 27 April 1865. The glass works became known as Hemingray Bros. & Company in 1864 following the death of Ralph Gray on 20 November 1863 and the subsequent settlement of his estate. | |
| Graybar Electric Co. | Electrical supplies | |||
| Great North Western Telegraph Co. | GNW; GNW TEL CO | 1880-1915 | Canada | Incorporated in 1880 and acquired Montreal Telegraph Co. in 1881. Company purchased by Canadian Northern Railway in 1915. |
| Great Western Railway | GWR | England | Made by Bullers Ltd | |
| Greeley (E. S.) & Co. | New York, NY | The E. S. Greeley & Co. were the successors to L. G. Tillotson & Co. The carried electrical supplies such as standard porcelain, wooden cleats, Tillotson glass insulators, Brooks ramshorn, glass blocks, rubber ramshorns, double headed rubber ramshorn, B&O and O'Brien Brookfield insulators, Victor forestry insulator, lightning rods and lightning rod insulators | ||
| Greenwood China Co. | 1890-? | Trenton, NJ | The company was incorporated on June 9, 1890 with a capitalization of $100,000. It was located on North Clinton St. | |
| Greenwood Pottery Co. | 1868-?? | Trenton, NJ | The company was incorporated on March 5, 1868 after being in operation since 1861 as Stephens, Tams, & Co. Owner was James Tams who came from Stafforshire, England. It was located on Canal St. In 1882, located East Canal near State. In 1898, products were hardware, electrical and sanitary specialties. In 1901, the plant produced thin china tableware, art ware, porcelain hardware trimmings, and electrical telegraph and telephone insulating supplies. They had 17 large kilns with an annual production of over $500,000. Table porcelain was marked "G. P. Co." The 1900 Railway Purchasing Agent's Directory indicated they produced porcelain insulators. | |
| H. G. CO. [see Hemingray Glass Co.] | H. G. CO. | |||
| H. K. Porter Co. [see Porter (H. K.) Co.] | ||||
| Hall China Co. | HALL | 1894-1930 | East Liverpool, OH | Nothing is certain about electrical porcelain manufacture by this company except telephone knobs have been found with HALL embossing. The company was located at Harvey and Elizabeth Sts. The company at one time or another (1905-1927) had purchased and operated four other small potteries. In 1930, they built a new plant at Klondyke where remnants of electrical porcelain can be found. However, it was customary to use dumpage for fill prior to new construction, so the electrical porcelain remnants could have come from one of the other small plants. |
| Hamilton Glass Works | 1864-1898 | Hamilton, Ontario | Hamilton Glass Works founded in 1864 by four men: Lyman Moore, John Winer, George Rutherford, and Nathan Gatchell (who was the only co-founder with previous experience, having owned the Lancaster Glass Works in Lancaster, New York). The following year Nathan Gatchell left the company and his interest was subsequently acquired by George E. Tuckett and John Billings. However, these two men didn't find the glass business very exciting and in 1866 they returned to the tobacco business instead. The Hamilton Glass Works was originally located at the eastern end of the block surrounded by Macauley Street, James Street East, Hughson Street, and Picton Street. By 1874 the company had acquired the entire block, illustrating how successful it had become. The following year, however, some competition had developed in the form of the Burlington Glass Works. Founded by Edward Kent, this new company was located at the intersection of Burlington and MacNab Streets in Hamilton. Though the Burlington Glass Works was arguably the most prolific glass works of its day, this did not prevent it from being purchased by the Hamilton Glass Works in 1885. Though this event effectively ended competition between the two companies, in the end it was of little consequence since both glass works were bought up by the Diamond Glass Company in 1891. | |
| Hamilton Porcelains, Ltd. | Hamilton, Ontario | Obtained Porcelain Products Inc. molds and made small insulators 1930-1945. | ||
| Hammond Cleat & Insulator Co. | HAMMOND | 1890's | Boston, MA | Address was 15 Custom House Street. Patented cleats (see patent 511,611) (see patent 511,612) |
| Hard Mfg. Co. | HARD MFG. CO. / PAT. APPLD. FOR | circa 1910's | Buffalo, NY | Glass knob used as a slider shoe for the ends of furniture legs. (see patent 1,187,378) |
| Hardwick Hindle, Inc. | HARDWICK HINDLE, INC. | Newark, NJ | specialties | |
| Harloe Insulator Co. | H. I. CO. | Jan. 1902-1906 | Hawley, PA | The company was organized with $150,000 capital by J. S. Welsh, president; Wm. Gregg, vice president; Myron T. Snyder, treasurer; Marcus Tuttle, secretary, and Morton Harloe, the inventor, general manager. Other stockholders were P. J. Bowers, George S. Thompson, of Hawley; Wilton S. Bloes and George E. Shay, of Peckville, PA. |
| Harloe Insulator Co. | Mar-Oct 1903 | Elmer, NJ | Plant taken over from the Sterling Glass Co. and operated for a short time. | |
| Hartford Faience Co. | H; H. F.; H. F. Co. | 1905-1947 | Hartford, CT | Dry pressed insulators made as early as 1905, then in 1925 began making wet process porcelain insulators. The 1921 EMF Electrical Year Book said the company manufactured special electrical porcelain. President, C. E. Whitney; secretary, treasurer and general manager, Fred L. Bishop. Address was on Hamilton St. and "business established 1894". |
| Harris (John R.) | HARRIS | see John Harris patent No. 1,302,158 split knob | ||
| Hart & Hegeman Mfg. Co. | H & H | Hartford, CT | switches and wiring devices | |
| Hart Mfg. Co. | H in a diamond | Hartford, CT | switches | |
| Hawley Glass Co. | Hawley, PA | Only made fruit jars and bottles. | ||
| Heineman Electric Co. | HECO | Philadelphia, PA | wiring devices | |
| Heinrich Co. | 1904-?? | Selb, Bavaria | ||
| Hemco Electric Mfg. Co. | HEMCO | New York, NY | wiring devices | |
| Hemingray Bros. & Co. | HEMINGRAY | 1864-1867 | Covington, KY | The glass works became known as Hemingray Bros. & Company in 1864 following the death of Ralph Gray on 20 November 1863 and the subsequent settlement of his estate. Ralph Gray’s will stipulated that his undivided half interest in the business be sold and the proceeds placed in trust for the benefit of his widow, Ann Gray. Robert Hemingray was named executor of the estate and maneuvered the sale to family members rather than placing Ralph’s interest on the open market. These were the “war years” and Robert no doubt was concerned about the introduction of a new and unknown partner into the business during these trying times. The “Hemingray Brothers” were Robert Hemingray, Samuel J. Hemingray, and Joseph C. Hemingray. Joseph C. Hemingray was a lawyer and banker in Leavenworth, Kansas, at the time of Ralph Gray’s death and it appears that he was able to provide the funds that enabled the Hemingray family to acquire Ralph Gray’s undivided half interest in the glass works. The “Company” consisted of James L. Foley and Richard Evans. Samuel J. Hemingray, Joseph C. Hemingray, James L. Foley, and Richard Evans each purchased one-fourth of Ralph Gray’s half interest in the company. Richard Evans was a brother-in-Law of Robert and Samuel J. Hemingray. Joseph sold his one-eighth undivided interest in the company to Robert Hemingray about a year later and returned to Kansas. Following the death of Samuel J. Hemingray on 10 September, 1866, the business became known as R. Hemingray & Co. |
| Hemingray (R.) & Co. | HEMINGRAY | 1868-1869 | Covington, KY | Following the death of Samuel J. Hemingray on 10 September, 1866, the business became known as R. Hemingray & Co. Papers of incorporation were filed with the Commonwealth of Kentucky and approved by the General Assembly on 21 March, 1870, at which time the glass works became the Hemingray Glass Company. |
| Hemingray Glass Co. | HEMINGRAY/H.G.CO./H | 1870-1933 | Covington, KY/Muncie, IN | Hemingray Glass Company. The company retained this name until May 2, 1933, when the Owens-Illinois Glass Company purchased the company on April 25, 1933. Papers filed with the Commonwealth of Kentucky on for the dissolution of the corporation were approved by the General Assembly on ________ 1933. The company did continue to exist on paper until 1938 when all the pending litigation was finally resolved. Address in Muncie is 1610 S. macedonia Ave. |
| Hendrie & Bolthoff Mfg & Supply Co. | 1861-1940's | Denver, CO | The 1921 EMF Electrical Year Book said the company manufactured and sold various electrical supplies. | |
| Henry L. Walker Co. | Electrical supplies | |||
| Hermsdorf-Schomburg-Isolatoren G. M. B. H. | Hermsdorf, Thuringen, Germany | |||
| Hero Glass Works | 1893-1910 | Philadelphia, PA | Owner was S. B. Rowley; made fruit jars. Could have made the CD 102 with HGW embossing. | |
| HESCHO | Japan | Porcelain for export to Canada | ||
| Hightension Electrical Industries | modern | Haora, India | Manufacturer of porcelain insulators | |
| High Tension Electrical Specialty Co. | HOLMES | Abington, MA | Electrical supplies; tree insulators | |
| Hindustan Chemicals | modern | Khurja, India | Manufacturer of porcelain insulators | |
| Homer Brooke | Long Island City, NY | See Seidlmyer Bros. Glass Works | ||
| Homer Brooke Glass Co. | 1908-1926 | Company formed solely to grant licenses to glass manufacturers for utilizing his patents | ||
| Homer Brooke Mold Co. | 1892-1908? | New York, NY | Maker of molds to press glass. | |
| Hope Glass Works | 1880-90's | Barnsley, York, England | Dan Rylands received patent gb1889-0016537 for cylindrical glass insulator. He was employed by the Hope Glass Works. | |
| Hopewell Insulation & Mfg. Co. | HOPEWELL | Barberton, OH | wiring devices | |
| Hoyang Electrical Industry Co., Ltd. | modern | Taipei, Taiwan | ||
| Hubbard & Co. | H in a shield; HUBBARD; HI-TEN | 1843-1920's? | Pittsburgh, PA | Electrical and pole line supplies. Address was 6301 Butler St. President, John W. Hubbard; vice-president, C. P. Seyler; treasurer, S. A. Rankin; manager, C. L. Peirce, Jr. |
| Hubbell (Harvey), Inc. | HUBBELL; LOCK SHELL | 1905-1920's? | Bridgeport, CT | The 1921 EMF Electrical Year Book said the company manufactured sockets, switches, receptacles and other electrical specialties. President, treasurer and general manager, Harvey Hubbell. |
| Hudson Bay Railway | HBR | 1880-? | Canada | Incorporated in 1880. |
| Hunan Zhongnan A&T Co., Ltd | Changsha, Hunan, China | Manufacturer of porcelain insulators of all types | ||
| Hunsruck Porzellanfabrick | Emmelhausen, Germany | |||
| Ideal Insulator & Electrical Mfg. Co. | 1909-?? | Missouri | Taken from a stock certificate. President was Alonzo W. Slayback | |
| Iittala Lasitehdas | Finland | |||
| Illinois Edison Porcelain | IEP, LM | 1957-1958 | Macomb, IL | IEP marking switched to LM |
| Illinois Electric Co. | Chicago, IL | Electrical supplies | ||
| Illinois Electric Porcelain Co. | ILLINOIS; triangle M | 1910-1953 | Macomb, IL | Manufacturer of wet process porcelain insulators. The 1921 EMF Electrical Year Book said the company manufactured porcelain cleats, knobs, insulators and other porcelain products for electrical purposes. President and general manager, C. W. Kettron; secretary, Charles Hanan; treasurer, W. C. Sutton. |
| Illinois Electric Porcelain Co. | BULL DOG; MACOMB; triangle M | 1910-about 1919 | Macomb, IL | Dry pressed insulators made by Illinois Electric Porcelain Co. usually with the embossed MACOMB marking. The 1921 EMF Electrical Year Book said they made standard 1, 2, and 3 wire porcelain cleats, special porcelain to conform to any specifications. |
| Illinois Electrical Material Co. | Chicago, IL | Electric railway supplies | ||
| Illinois McGraw Electric Co. | 1954-1957 | Macomb, IL | ||
| IMEC | Italy | |||
| Imperial Porcelain Works | DUGGAN; I in a circle | 1891-1930's | Trenton, NJ | The company was formed in July 1891 by Frederick A. Duggan and Benjamin B. Dinsmore. Both were formerly with Trenton China Co., which had become bankrupt when they went into receivership in June 1891. Duggan was born in Quebec the son of a British army officer came to Trenton in the late 1870's. Originally the plant made dry process standard porcelain. In 1897 they began making wet process porcelain apparently with the assistance of Fred Locke. The plant was located on the northwest corner of Mulberry St. and Klagg Ave. (457 Mulberry St.). The plant was totally destroyed by fire on February 3, 1907, but was immediately rebuilt. Company in specialty porcelain business until WW II (see patent 508,687). They were listed in the 1927 McGraw-Hill Electrical Trade catalog. The company was listed in the 1922 Journal of the American Ceramic Society under the direction of B. B. Dinsmore. The company was not listed as a corporation of New Jersey. The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain |
| Independent Insulator Co. | 1904-?? | New York, NY | The company was incorporated on November 10, 1904 with a capital of $250,000 by Milton Greenebaum (NYC), C. Hull (Brooklyn), and H. M. Wells (Passulc, NJ) | |
| Indepor Inc. | 1990-?? | Medicine Hat, Alberta | ||
| Indiana Glass Co. | 1907-2002 | Dunkirk, IN | Indiana Glass Company (subsidiary of Lancaster Glass Corporation) has produced a tremendous variety of glassware throughout it's long history. In 1967, the very last insulators carrying the Hemingray name were produced at the Indiana Glass Co. glass plant in Dunkirk, using molds and machinery shipped over from Muncie. | |
| Industria Milanese Elettro Ceramica (Milanese Electro Ceramics Industry) | IMEC | Milan, Italy | Manufacturer of porcelain insulators | |
| Industrial Ceramics, Inc. | PINCO | Dec. 1985-1987 | Lima, NY | Purchased Lima plant and continued to use the PINCO marking until they ceased the manufacture of pin-type insulators in 1987 (see Porcelain Insulator Corp.) |
| Interpace Corp. | Lapp Insulator Co. was a division of Interpace at one time. | |||
| Iran Insulator Co. | ??-present | Saveh, Iran | ||
| Iron Glass Works (see American Iron Glass Pipe and Plate Co.) | Haverhill, MA | It was also referred to as the Iron Glass Co. | ||
| ISOBLOC (??) | France | |||
| Isolantite Manufacturing Co., Inc. | ISOLANTITE | c. 1905-present | Stirling, NJ | Manufacturer of steatite, high alumina, and cordierite insulators for antenna strain, standoff, lead-in, bushings, spacers, suspension and custom applications. |
| ISOREX | France | See Charbonneaux & Cie | ||
| I-T-E Imperial Corp. | 1953-1976 | Victor, NY | ||
| J. Stolle Niemen | ||||
| Jalisco Comp. | Mexico | Delling's "Before Threads" mentions this Mexican company but no information is known. | ||
| James Edwards & Son | 1870's-1880's | Burslem, Staffordshire, England | Advertisement February 1878 in C&GJ stated electrical insulators | |
| Jarsan Electric Co., Ltd. | Taipei, Taiwan | |||
| Jaya Shree Insulators | 1967-2003 | Risha, India | Another plant at Halol was started in 1981. Company merged in 2003 with NGK Insulators, Japan to form Birla NGK Insulators Private Ltd. | |
| Jefferson Electric Mfg. Co. | JEFFERSON | Chicago, IL | specialties | |
| Jeffery-Dewitt Co. (see Jeffery Dewitt Insulator Co.) | 1908-1915 | Newark, NJ/Detroit, MI | The company made porcelain spark plug insulators. | |
| Jeffery Dewitt Insulator Co. | JD | 1915-1952 | Kenova (Huntington), WV | Dr. Joseph A. Jeffery (a dentist), his brother Benjamin A. Jeffery (a machinist), and Benjamin's brother-in-law, Mortimer C. Dewitt (a grocer) started the Jeffery-Dewitt Co. The two brothers filed for a spark plug patent in mid-1906 and about that time opened the Reliance Automobile Co. in San Francisco. Jeffery-Dewitt Co. apparently was started in 1908 in Newark, NJ to make Reliance spark plugs. It also made porcelain for sanitary ware, insulators, tumbling jars, crucibles, etc. In February 1910, they moved the porcelain spark plug plant to Detroit, MI. In January 1916, Robert Johnston filed for a patent for a thick porcelain suspension insulator and assigned it to the Jeffery-Dewitt Co. The patent was not granted until February 1920 (1,329,770). During the patent pending period, orders for thick porcelain insulators exceeded expectations. The original kiln, in Detroit, was designed for making spark plug bodies and was too small for the rapidly expanding high voltage insulator business. In 1915, the Jeffery-Dewitt Co. was purchased by the Champion Spark Plug Co. in order to gain Dr. Jeffery's knowledge of spark plug porcelain in an effort to compete with their rival competitor, the Champion Ignition Co. (AC). In early in 1916, Champion purchased a site on the Ohio river at Kenova, WV to build a plant for the manufacture of thick electrical porcelain insulators. However, the plant was not ready until late 1918 and flooding on the Ohio River, which remained a problem throughout the history of the Kenova plant, kept the plant from production until early 1920, the same year that the patent was granted. So how were the orders filled 1915-20? In a letter from the Champion Archives stated that JD contracted to other electrical porcelain manufacturers to make the porcelain bodies. These companies were Pittsburg High Voltage Insulator Co, Ohio Brass, and Thomas. Specimens of three pre-patent insulators are: 1) Tines of spider embossed JD Co Detroit Michigan Patent Pending. Under top tine there is the 1918 Pittsburg date stamp and it has a light drippy blue, not true JD blue glaze; 2.) Same insulator but without control date stamp; 3.) No marking, dark gray glaze. The first two are slightly smaller than insulators with the 1920 patent date. The third is slightly larger. Others reported but never confirmed are: 1) JD blue glaze with Patent Pending (blue under-glaze ink stamp on top neck arch). This is possibly the initial production at the Kenova Plant; 2) White glaze with black under-glaze ink Patent Pending marking; 3) 1920 manufacturing date only and it does not have marking referencing Patent Pending. The Kenova plant was destroyed by fire on October 29, 1952. The 1921 EMF Electrical Year Book said address was 701 1st National Bank Bldg. President, Dr. J. A. Jeffery; vice-president, B. A. Jeffery; secretary and treasurer, M. C. Dewitt; acting manager, W. D. A. Peaslee. |
| Jenaer Glaswerk Schott & Gen. | Jena, Germany | |||
| Jerome Redding & Co. | Electrical supplies: CD 133, porcelain Spool | |||
| Jobson Bros. | 1869-1885 | Dudley, England | Robert Jobson started in 1845 as an iron worker specializing in iron, cast iron, brass and other metals at the Phoenix Works in Dudley. Name Jobson Brothers was started in 1876; however, he produced insulators as early as 1865. First two insulator patents were in 1860. Manufactured the 1877 Cordeaux patent insulator. Around 1884 name was changed to Jobson & Co. In 1885, name was changed to Buller Jobson & Co. from merger with W. W. Buller & Co. In 1873, Howard C. Jobson also worked at the Phoenix Works with Robert (father?). There was also an Edward C. Jobson at that time. | |
| Jobson & Co. | c. 1884 | Dudley, England | See Jobson Bros. | |
| Johann Haviland | 1907-?? | Waldershof, Bavaria | ||
| Johns-Manville (H. W.) Co. | New York, NY | The 1921 EMF Electrical Year Book said the company manufactured electrical insulating materials, cutout bases, fuses, etc. President and treasurer, T. F. Manville; vice-president, W. R. Seigle; vice-president and secretary, H. E. Manville. Address was Madison Ave. and 41st St. | ||
| Johnson (E. F.) Co. | JOHNSON | Waseca, MN | Radio antenna insulators | |
| Johnson & Nephew | Manchester, England | Name found ona Varley's brown stoneware insulator | ||
| Johnson and Phillips | 1890's | London, England | Electrical equipment supplier and oil insulators made of glass, pottery, and porcelain. | |
| Johns-Pratt Co. | 1886-1920's? | Hartford, CT | The 1921 EMF Electrical Year Book said the company manufactured meters, fuses, molded insulation and other electrical specialties. Their address was 555 Capital Ave. Secretary and treasurer, Robert C. Buell. They were the exclusive distributor of The H. W. Johns-Manville Co. | |
| Joslyn Mfg. & Supply Co. | JOSLYN, PINCO | 1902-today | Chicago, IL | The 1921 EMF Electrical Year Book said the company manufactured pole-line construction material and was an electrical supply company. Address was 133 W. Washington St. with factories in Chicago, IL, Macomb, IL, Centralia, WA, McCormick, WA, Hattiesburg, MS. President, M. L. Joslyn; vice-president, B. S. Handwork; secretary and treasurer, A. G. Jarmin. |
| Julius Andrea & Sons Co. | ||||
| Kalbfleisch's (Martin) Sons | Brooklyn, NY | The company owned the Bushwick Glass Works in Brooklyn, the Buffalo and Bayonne works, and a store on Fulton street. Creditors forced the sale of the assets in 1888 with the Receiver being William Brookfield. | ||
| Karhulan Lasitehdas | Finland | |||
| Karlsbader Kaolin-Industrie-Gesellschaft | early 1900's | Merkelsgrun, Austria-Hungary | ||
| Kearney (James R.) Corp. | KEARNEY | St. Louis, MO & Toronto, Canada | Electrical supplies, wireholders | |
| Kearns & Co. | 1864-1886 | Zanesville, OH | A check exists circa 1870 that indicates telegraph insulators were then being produced. Nothing is known about what type(s) these might have been. | |
| Kennelworth Tile Co. | ||||
| Kenosha Insulator Co. | 1871-? | Kenosha, WI | Produced the "Kenosha" wooden insulator with metal hook and the C. H. Pond patented insulator in the 1860's and 1870's. The Kenosha insulator was designed by Z. G. Simmons, the president of the National Telegraph Co. In 1872 Mr. C. H. Haskins became connected with the company. | |
| Keramische Sondermassen | Germany | |||
| Kerr Glass Mfg. Co. | 1969-1978 | Milleville, NJ | The company purchased Armstrong Cork Co. plant in Millville, NJ (formerly Whitall Tatum Co.). Insulator production ceased in 1975. | |
| Killock Co. (David) | K K K | New York, NY | porcelain bushings | |
| Kilner Brothers | ||||
| Kimball (Warren) & Co. | Trenton, NJ | Warren Kimball was the owner of a small pottery in Trenton, Standard China Works, and mentioned in Thomas' Boch patent suit against Fred Locke and Electric Porcelain Mfg. Co. He died in January 1916 [see article 8569]. No other information. | ||
| King City Glass Works | K.C.G.W. | 1890-1897 | Fairmount, IN | "Insulators marked ""K.C.G.W."" were manufactured at this factory. The plant was bought by Marion Fruit Jar & Bottle Company in 1897. |
| There is a possibility that some insulators were produced | ||||
| by the M F J & B Co., re-using old molds from the King City operation." | ||||
| Kirchberger (M.) & Co., Inc. | LAVAROCK | Brooklyn, NY | In 1921 and 1927, their address was 1425 37th St. | |
| Kirkman Engineering Corp. | K-E; KIRKMAN; KIRKMAN ENG CORPN. N.Y. | early 1900's | New York | Maker of fuses "since 1912" and radio lightning arresters. Also cutouts, cleat-receptacles. |
| Klingel, E. L. | KLINGEL | St. Paul, MN | special knobs | |
| Knapp Foundry Co., Inc. | KNAPP | Akron, OH | secondary rack spools | |
| Knowles (C. S.) Co.. | C. S. K.; C. S. KNOWLES; KNOWLES | early 1900's | Boston, MA | Jobber for porcelain insulators made New Lexington, Imperial, and glass insulators embossed with Knowles prism, wiring devices |
| Knox Porcelain Corp. | KNOX | 1923-Sept. 1975 | Knoxville, TN | Purchased by Porcelain Products Co. Made standard porcelain and specialties. |
| Kollarth Brothers | KOLUX | Schenectady, NY | sign insulators | |
| Kopple Potteries | Adelaide, Australia | |||
| Koran (see Fukagawa Porcelain) | ||||
| Kortick Mfg. Co. | San Francisco, CA | Plant was located at 5600 Third St. Maydwell & Hartzell, Inc. were the exclusive distributors. The company was a supplier for pole line equipment and hardware and for racks, wireholders, and porcelain insulators. | ||
| Kosters Premiere Potteries | 1930's-1977 | Adelaide, Australia | Located in Magill, a suburb of Adelaide | |
| Kronacher Porzellanfabrick | Bayern, Germany | |||
| Kuhlman Electric Co. | KUHLMAN in a diamond | Bay City, MI | primary fuse cutouts | |
| Kutnetsov | Imperial Russia | |||
| L. & F. De Fuisseaux Fabricants Baudour | 1842-1977 | Baudour, Belgium | First insulator made 1870; company near bankruptcy in 1976 when Japanese company NGK offered to purchase | |
| Lancaster Glass Works | 1849-c. 1908 | Lancaster, NY | Some of the firm names used include Reed, Shim & Co.; James & Gatchell; James Glass Works; and the Lancaster Cooperative Glass Works. Year the company closed could be 1890. | |
| Landgon & Hughes Electric Co | Utica, NY | Electrical supplies, standard porcelain, cleats, tubes, Locke pintypes | ||
| Langenthal | Switzerland | |||
| Lapp Insulator Co. | 1916-2005 | LeRoy, NY | The company was started by John S. Lapp in 1916. He had previously worked at Locke in Victor, NY and for Fred Locke. The Le Roy plant was a manufacturer of wet process porcelain insulators at 130 Gilbert St. In 1957, they ceased manufacture of unipart pin-type insulators and abandoned multipart pin-type insulators a few years later. In February 2005, production of porcelain line posts and station post insulators was transferred to the Le Roy plant. In December 2005, Lapp was purchased by a group of German investors. The new owners are Andlinger & Company, Inc. The new company name is Lapp Insulator Co. LLC. | |
| Lapp Insulator Co. | late 1960's-2005 | Sandersville, GA | The Sandersville plant was built for the automated production of porcelain suspension insulators. Later they manufactured porcelain line post and station post insulators until production was ceased in February 2005 when that production was moved to Le Roy, NY. The Sandersville plant then became a warehouse for receiving and shipping porcelain suspension insulator from China and India. In December 2005, Lapp was purchased by a group of German investors. The new owners are Andlinger & Company, Inc. The new company name is Lapp Insulator Co. LLC. | |
| Lapp Insulator Co. LLC | 2005-present | LeRoy, NY/Sandersville, GA | In December 2005, Lapp was purchased by a group of German investors. The new owners are Andlinger & Company, Inc. The new company name is Lapp Insulator Co. LLC. | |
| Lapp Insulator GmbH | ??-present | Wunsiedel, Germany | ||
| Latham (E. B.) & Co. | New York, NY | Electrical supplies | ||
| Latimer, Clark, Muirhead & Co., Ltd. | late 1800's | London, England | Manufacturer of the upside-down corrugated cone porcelain insulator patented by John Fuller and George Fuller in 1877. See patent gb1877-000076. White Fuller insulators have been found in Argentina with incuse marking Latimer, Clark, Muirhead & Co. Ltd. | |
| L'Electro Verre (The Electrical Glass) | L'ELECTRO VERRE | 1931-1959 | Saint-Yorre, France | Speculation is the company started at the Verreries des Islettes. Merged with Nord-Verre to form Sediver |
| Leonard Glass Works | CHICAGO INSULATING CO. | c. 1883-1886 | Detroit, MI | Made insulators for Chicago Insulating Co. 1882-1885. See Chicago Insulating Co. for more details. |
| Leviton Mfg. Co. | LEVITON | Brooklyn, NY | standard porcelain and specialties | |
| Lewis, J. Slater | 1880's | Birkenhead, England | Manufacturer of telegraph insulators (like CD 110.5, CD 110.6 and U-2021) with business located at 28 Hamilton Street. Lewis T. Slater was also listed associated with J. Slater Lewis at the same address in Birkenhead as a "telegraph insulator manufacturer". | |
| Lima Insulator Co. | 1904-1908 | Lima, NY | When Fred Locke retired from Locke in late 1904, he secretly started the Lima Insulator Co. in nearby Lima, NY. The plant was destroyed by fire in late 1908. Locke learned of his ownership even thought Fred Locke claimed his wife was the owner. This was in conflict with his agreement with Locke when he retired (forced out). Locke purchased the property in January 1910 and rebuilt the plant. | |
| Line Material Co. | L.M.; LM in triangle | 1953-1967 | Macomb, IL | Insulators and supplies; became part of McGraw Electric in 1949 |
| Locke, Fred M. | 1893-1902 | Victor, NY | Manufacturer of wet process porcelain insulators and also sold Brookfield glass insulators. Started a business in 1893 to sell glass insulators made by Hemingray and a ramshorn style he patented in 1889. Later he had glass insulators made by Brookfield and porcelain insulators made by Thomas, Imperial and then Electric Porcelain Mfg. Co. In the summer of 1898, he opened his own porcelain insulator plant in Victor, NY. In September 1902, he incorporated a company with Rochester investors and retained majority ownership. He retired from insulator manufacture in December 1904 but continued to have some influence for a few years. | |
| Locke Insulator Corp. | 1921-1928 | Victor, NY | Manufacturer of wet process porcelain insulators | |
| Locke Insulator Corp. | 1922-1948 | Baltimore, MD | Manufacturer of wet process porcelain insulators. The 1921 EMF Electrical Year Book said the company manufactured insulators and insulator accessories. President, Donald Symington; vice-presidents, F. H. Reagan, J. F. Symington, W. G. Hoffman, Jr.; secretary, J. F. Douty, Jr.; treasurer, W. G. Hoffman, Jr.; general manager, F. H. Reagan. The Locke company consistently notes 1894 as the starting year, but actual year is 1893 (see Fred M. Locke) | |
| Locke Insulator Mfg. Co. | 1902-1921 | Victor, NY | also sold Brookfield glass insulators | |
| Locke Insulator Mfg. Co. | 1910-1919 | Lima, NY | The old Lima Insulator Co. plant was purchased in January 1910 after being idle since the 1908 fire. The plant burned again in January 1919 and was closed. In 1920 it was sold to William Harvey who formed the Porcelain Insulator Corp. (PINCO). | |
| Locke Insulators, Inc. | 1948-1974 | Baltimore, MD | Manufacturer of wet process porcelain insulators. Pin-types ceased in 1971. NGK Insulators, Ltd. Bought controlling interest from GE in 1974 and finally became wholly owned in 1989. | |
| Long Beach Glass Co. | ??-1925 | Long Beach, CA | Merged with McLaughlin Glass Co. in June 1925. | |
| London & North Eastern Railway | LNER | England | Made by Bullers Ltd | |
| London, Midland & Scottish Railway | LMS | England | Made by Bullers Ltd | |
| Louisville Glass Works | 1855-1873 | Louisville, KY | A group of glassblowers including John Stanger, William Doyle, Joseph Ramsey, Jr., Leopold Gottlieb, John Zell, and Israel Patterson were involved in the opening of the Louisville Glass Works (formerly the Kentucky Glass Works). It was owned by Douglass, Rutherford & Co. (1855-1856), Stranger, Doyle & Co. (c. 1856), and Krack, Stanger & Co (1856 or 1857 until 1865). In 1865 the works also supplied all the insulators for the first telegraph and fire alarm system in Louisville. By 1865 or 1866 the company name had become J.A. Krack & Co. and Krack & Reed February 1, 1866 to 1869 followed by Krack, Reed & Co. (1869-1871) and L. S. Reed & Brother (1871-c. 1873). Around 1866 the plant was making insulators for the Southwestern Telegraph Co. The glass works was closed permanently in 1873 due to the recession in that year. Another firm known as Louisville Glass Works (c. 1885 to January 1886) was a reopening of the Southern Glass Works at 11th and Monroe streets. Joseph M. Stanger, son of John Stanger, Sr., was listed as the superintendent. | |
| LSP Industrial Ceramics, Inc. | 1983-present | Lambertville, NJ | Manufacturer & stocking distributor of standard & custom strain insulators transmitting antenna strain insulators. Strain insulators are available in standard rectangular shapes in sizes of 4 in. to 15 in. Insulators can feature metal shackles on one or both ends with end configurations for direct cable attachment with various hole shapes. Round light duty strain & spreader insulators. | |
| LTL Mfg. Corp. | Taipei, Taiwan | |||
| Lundy, C. | C. LUNDY; REID BROS. LONDON | London, England | Pottery insulator with ramshorn. Two styles of "Lundy" insulator. See June 1994 CJ pages 10-12. | |
| Lynchburg Glass Corp. | LYNCHBURG | 1919-1922; 1923-1925 | Lynchburg, VA | The plant was completed around February 1919. The officers were: President, N. D. Eller; vice president, Walker Pettijohn; secretary, D. B. Rylands; treasurer, N. D. Elle; general manager, B. O. Beckett. The plant discontinued operations and filed for bankruptcy due to unpaid taxes and turned over the property deed to the trustee on May 5, 1922 to dispose of the property. William Gayner took over the company in 1923. The new Lynchburg Glass Corp. was incorporated in September 1923. A Brookfield press was installed around July 1924. More than 4 million insulator were made during the short time of operation. The plant closed in May 1925 for not paying interest on bonded debt. In March 1926, the defunct company was sold for $18,000. |
| Lyndeborough Glass Co. | 1866-1886 | S. Lyndeborough, NH | A large vein of white quartz was discovered in near the newly glass factory at Lyndeborough, NH. On November 15,1866, the owners of the Lyndeborough Glass Company purchased land containing fine quality white sand silica to the glass works. About one year later, in June of 1867, Luther Roby, Timothy Putnam & Charles Eaton incorporated The New Hampshire Silex Company to that end. About this same time Charles W. Foster from the Canada Glass Works of Foster Brothers in Canada East, now Quebec, and the New Granite Glass Works at Mill Village, Stoddard, NH, was hired as Superintendent of the newly formed glass works at Lyndeborough. The New Hampshire Silex Company and the Lyndeborough Glass Company were incorporated as separate entities. CD 102.4, CD 134 and CD 145 and LRI's were produced along with bottles and battery jars. Insulators embossed American Insulator Co. were found at the site. In June 1886, the main buildings of the factory were destroyed by fire. | |
| M. A. Buell | Electrical supplies, CD 131 | |||
| Macintyre, James & Co. Ltd. | 1838-?? | Burslem, England | ||
| Maddock (John) & Sons | Trenton, NJ | Thomas Maddock & Sons started in 1861Company was incorporated on January 6, 1905 and listed as on Muirhead St. In 1898, products were sanitary specialties | ||
| Maling, C. T. (or C. F. Maling) | 1762-1880's | Newcastle-on-Tyne, England | Ford Pottery manufacturers of porous ware and semi-porcelain insulators of any desired shape. Manufacture of exclusive shapes for H. M. Government, electric light companies and engineers. An 1883 ad in Berly's showed an illustration of a type "Z" pottery insulator and a shackle insulator. The 1885 Electricans' Directory stated C. F. Maling was an insulator and battery jar maker at 20 Bartlett's buildings, E. C. | |
| Maltsov | Imperial Russia | |||
| Manhattan Electrical Supply Co. | MANHATTAN | 1890-1920'S? | New York, NY | Electrical supplies, Brookfield, standard porcelain, B&T tubes, cleats, wooden cleats, Victor tree insulator. Address was 17 Park Place. |
| Manifattura Isolatori Vetro Acqui Terme S.p.A. | MIVA | Acqui, Italy | ||
| Manufacturer's Distributing Co. | MANDICO | New York, NY | sign receptacles | |
| Mar-Bal Pultrusion, Inc. | 1974-present | Willoughby, OH | Designer & manufacturer of high, intermediate & low voltage insulators including strain & suspension insulators made of epoxy, fibre & fiberglass reinforced plastic for telegraph & telephone, transportation, antenna, banner, marine & electrical applications. Other products include standard & custom fiberglass reinforced plastic pultrusions, rods, bars, rectangles, tubes, angles, channels & dog bone shapes. | |
| Marshall Lefferts & Co. | LEFFERTS | 1847-1860's | Supplied telegraph wire imported from England for telegraph lines. | |
| Marshall-Wells Co. | Electrical supplies | |||
| Marshall-Wells Hardware Co. | Eectrical supplies | |||
| Masnieres (see Verreries de Masnieres) | ??-1940 | Masnieres, France | Logo VM interlaced in a circle same than Cartel Vidreria Monterrey (Mexico) | |
| Massachusetts Glass Co. | 1867-1871 | Somerville, MA | Predecessor to Boston Bottle Works | |
| Max Engels | Germany | |||
| Maxwell Engineering & Mfg. Co. | MESCO | New York, NY | wiring devices | |
| Maydwell & Hartzell, Inc [see Crystallite Products Co.] | MAYDWELL | The exclusive distributors for the Kortick Mfg. Co. in Idaho, Montana, Oregon and Washington according to a Kortick letter dated January 3, 1949. | ||
| Mayer & Englund Co. | THE M & E CO. | 1901-1906 | Philadelphia, PA | Electrical supplies. Electric Service Supplies Co. catalog No. 4 was dated 1909. Mayer & Englund Co. preceeded ESSC. Charles J. Mayer was president of ESSC with A. H. Englund as Treasurer. |
| McBride Glass Co. | Anaheim, CA | The McBride Glass Company at Anaheim, manufactured chimneys, insulators, and a varied line of similar articles, is really a second edition, on a smaller scale, of the McBride Glass Works, at Salem, W. Va. Thomas F. McBride, who formerly owned the Salem plant, now operates this one which has been on the Coast for a number of years. Associated with Mr. McBride is his son, J. A. McBride, as general manager of the plant. The insulators they made are radio antenna insulators. | ||
| McCarthy Bros. & Ford | Buffalo, NY | Electrical supplies | ||
| McGraw Electric Co. | 1951-1952 | Kenova, WV | Plant burned down | |
| McGraw Electric Co. | 1953-1954 | Macomb, IL | Name changed to Illinois McGraw Electric Co. | |
| McGraw-Edison Co. | 1967-1985 | Macomb, IL | Joined Cooper Power Systems | |
| McKee (Samuel) & Co. | S. McKee & Co. | 1834-1888 | Pittsburg, PA | Samuel McKee started the company in 1834 on the South Side. The works consisted of three factories, two for the manufacture of glass, the other exclusively for bottles, with 200 employees. From 1863 to 1875 the company address was 62 Water St. They produced bottles, window glass and, apparently to a lesser degree, insulators. The glass in the Wade insulator resembles McKee insulator glass. Patent 107,075 (Sept. 6, 1870) was issued to Samuel McKee for a tall threadless Type B insulator that had a screw thread molded to the exterior of the hat. This allowed the insulator to be screwed into the bottom of the crossarm or simply mounted on a threadless pin. |
| McKee & Co. | McKEE & Co. | 1888-1951 | Jeanette, PA | This location may have been the former Chambers & McKee plant, which was the combination of the interest of the firm of F. & J. McKee (established in 1853). In 1857 is changed to McKee Brothers. |
| McLaughlin Glass Co. | 1920-1935 | Vernon, CA | Company started by William McLaughlin who use to work at Robert Good, Jr.'s plant in Valverde, CO. McLaughlin merged with the Long Beach Glass Co. in June 1925. | |
| McMicking | McMicking | 1870's | Canada | Robert Burns McMicking was born in 1843 in Ontario and worked with the Montreal Telegraph Co. working under H. P. Dwight. In 1862 to moved to British Columbia. In 1870 he was put in charge of the Western Union office at Victoria. In 1871, the Provincial government took over all of the lines and he became superintendent at Yale and later resigned in 1880. |
| Medalta Potteries Ltd. | 1912-1954 | Medicine Hat, Alberta | The plant started under the name of Medalta Stoneware Ltd. In 1924 the name was changed to Medalta Potteries Ltd. In 1937 a deposit of white burning clay was discovered which allowed them to produce porcelain. | |
| Mehr Glass Factory | 1930's-?? | Iran | ||
| Meister International, LLC | Ross, OH | Distributor of insulators made in China | ||
| Mercer Porcelain Co. | c. early 1900's to c. 1930's | Trenton, NJ | While primarily a manufacturer of dinnerware and household items, according to 1927 McGraw-Hill Electrical Trade catalog, the company was a manufacturer of porcelain insulators | |
| Mercer Pottery Co. | 1869-?? | Trenton, NJ | The company was organized in 1868 and incorporated on February 10, 1869 and located at 39 Muirhead St. In 1901, James Moses was the owner making semi-porcelain, the first in the U.S. Capitalization was increased to $300,000 on September 26, 1903. This company probably changed to Mercer Porcelain Co. | |
| Merklinska Porcelanska | MP | Merklin, Czech Republic | Manufacturer of porcelain insulators | |
| Mersick (C. S.) & Co. | New Haven, CT | Electrical supplies | ||
| Metropolitan Electrical Supply Co. | 1893-1920's? | Long Island City, NY | Light fixtures and electrical supplies | |
| Metsch Refractories, Inc. | 1922-present | Newell, WV | Originally the plant was started by John W. Boch, Sr. in 1907 (see Boch (John) Porcelain Co.). They make dry pressed electrical porcelain and refractory porcelain. Currently, the company claims it was started in 1952 and is located in nearby Chester, WV. Have not been able to explain how the company changed from original operation to the current operation which started in 1952. | |
| Mica Insulator Co. | MICANITE | 1890's-?? | New York, NY | The company purchased rights to the Dyer patent 483,646 that produced "Micanite", which molded mica into desired sheets for electrical insulation, instead of using the more expensive natural sheets of mica. The 1921 EMF Electrical Year Book said address was 68 Church St. President, Lewis W. Kingsley; vice-president, Edward C. Wood; treasurer, George S. Leary. |
| Mica Insulator Co. | Victoriaville, Quebec, Canada | The 1921 EMF Electrical Year Book said the company manufactured insulating materials. | ||
| Micanite and Insulators Co., Ltd. | England | |||
| Mid-West Electric Co. | Omaha, NE and Des Moines, IA | Electrical supplies | ||
| Milligan (T. V.) Porcelain Co. | East Liverpool, OH | Former Adamant Porcelain Co. | ||
| Minerallac Electric Co. | circa 1912 | Chicago, IL | They produced a wooden insulator that looked like a pony insulator on a pin all from one piece of wood. It was called the "Unity" insulator and impregnated with an insulating compound. | |
| Mine & Smelter Supply Co. | ?-1920's? | Denver, CO | Electrical supplies, White strains, standard porcelain, Hemingray, Locke porcelain, mine insulator, Westinghouse, fireplugs, | |
| Minnesota Electric Co. | CHAPMAN | Minneapolis, MN | telephone and telegraph arresters | |
| MIVA [see Manifattura Isolatori Vetro-Acqui Terme S.p.A] | MIVA | Acqui, Italy | ||
| Mogadore Insulator Co. | M I CO | 1901-? | Mogadore, OH | Company was incorporated on December 10, 1901 for the purpose of making clay, porcelain and electrical insulators. |
| Mogadore Insulator Co. | 1920-1928 | Akron (Mogadore), OH | Formerly Akron Smoking Pipe Co.; name changed to Akron Porcelain Co. on April 27, 1920. The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain. President and general manager, F. W. Butler; secretary and treasurer, F. A. Fenton. | |
| M/S Max Well Ceramic | modern | Wadhwan, India | Manufacturer of porcelain insulators | |
| Mt. Pleasant Glass Works | 1844-1870 | Mt. Pleasant, NY | ||
| Mulford & Biddle | 1860's | New York, NY | The company offices were at 83 John St. The factory was located at South Brooklyn. It is likely insulators with the Mulford & Biddle name were made by another company. Many insulators were installed in 1868 along the Union Pacific Railroad. | |
| Muter Co. (The) | GUARDIAN | Chicago, IL | Radio antenna insulators | |
| Mutual Electric & Machine Co. | BULL DOG | Detroit, MI | switches and cutouts | |
| N. Slater Co., Ltd | Electrical supplies | |||
| Naresh Potteries | modern | Khurja, India | Manufacturer of porcelain insulators. | |
| National Ceramic Co. | 1953-present | Trenton, NJ | National Ceramic Co. is the former National Porcelain Co. and is located on Southland Street in Trenton. The company produces custom ceramic insulators. One source said it occupies the site of the old Excelsior Pottery Works, which was started in 1857 purchased by the Willets Mfg. Co. in 1879. | |
| National Electric Porcelain Co. | circa 1904 | East Liverpool, OH | In September 1904, investors in Dayton made the company an offer to purchase the company and move it to Dayton. | |
| National Electric Porcelain Co. | N; NAT; NCO | 1911-1927 | Carey, OH | Manufacturer of electrical porcelain. Merged into Porcelain Products, Inc. in 1927. The 1921 EMF Electrical Year Book said the company manufactured electrical porcelain. President and general manager, W. S. Bish; vice-president, W. R. Kurtz; secretary, J. D. Ewing; treasurer, H. F. Graves. |
| National Electric Products Co. | NAT'L | Pittsburg, PA | wireholders | |
| National Electrical Supply Co. | early 1900's | Washington, D. C. | U-339; crown brand, Brookfield, Prism, Locke porcelain, Hemingray, Thomas. Address was 1328-30 New York Ave. | |
| National Glass Co. | 1899-? | A trust was to be formed of various bottle makers in New Jersey, New York, and Pennsylvania at a value of $12,000,000. The companies joining the trust with Charles A. Tatum as president and William Brookfield as vice-president were Whitall, Tatum & Co., New York and Philadelphia; Brookfield Glass Company, Brooklyn; Moore Brothers' Glass Works, Clayton, N. J.; Cumberland Glass Works, Bridgeton, N. J.; Salem Glass Works, N. J.; H. C. Fox & Sons, Philadelphia; Bodine Glass Works, Williamstown, N. J.; More-Jones Glass Works, Bridgeton, N. J.; George Jonas & Co., Minotota, N. J.; F. M. Pierce & Co., Elmer, N. J.; Standard Glass Works, Philadelphia; Lockport Glass Works, Lockport, N. Y.; S. M. Bassett & Co., Elmer, N. J.; T. C. Wheaton & Co., Millville, N. J.; Jeffries Glass Works, Rochester, Penn., and Fairton, N. J.; East Stroudsburg Glass Works, East Stroudsburg, Penn. | ||
| National Glass Screw Co. | 1885 | Haverhill, MA | Company was listed by this name in 1885 and in 1886 as the National Insulator Co. | |
| National Insulator Co. | 1884-1885 | Haverhill, MA | The American Iron Glass Pipe & Plate Company (Iron Glass Works) produce insulators for this company. | |
| National Insulator Co. | 1897-?? | Gainsville, FL | The National Insulator Company was incorporated in May 1897 by J. E. Renault, E. W. Millican, B. F. Dillon, and W. W. Hampton, to manufacture insulators for telegraph and telephone companies. Capital stock, $20,000. | |
| National Insulator Co. | 1910-?? | Clarksburg, WV / Bridgeton, NJ | Formed in September 1910 by the Electric Insulator Co. The plant was to make "glass insulators, for which Jesse E. Inman, of Hartford, Conn., has a patent, and Mr. Inman will be the active head of the concern. The industry will consist of four factories, including a glass plant, a porcelain plant, a sherardizing plant and a machine shop.". No patent for Inman could be found. The plant was to be at Wellsburg, WV in the former plant of the Riverside Glass Co. In July 1911, Jesse Inman incorporated the National Insulator Co. in Camden, NJ for $300,000 in July 1911. In August 1911, the incorporation was changed to $50,000. Not sure if the plant was ever built. | |
| National Porcelain Co. | 1906-1927 | Trenton, NJ | The company was incorporated on March 10, 1906 and listed as located on Old Rose and Feeder Streets. Plant was located at 500 Southland St. at Brunswick St. Directories listed products as mine insulators, telephone and telegraph insulators, porcelain sockets and insulators. The company was merged into Porcelain Products Co., Inc. in 1927. No markings on insulators are attributed to this company. The company stock was sold on receivers sale in 1953 for $186,120 to the former plant manager, Joseph A. Schermerhorn. This could have been when the name was changed to National Ceramic Co. The plant was on the site of the old Excelsior Pottery Works built in 1857. The 1921 EMF Electrical Year Book said the company manufactured porcelain sockets and insulators. President, Samuel L. Dunkle; secretary, treasurer and general manager, Bayard L. Dunkle. | |
| National Porcelain Co. | NP | 1947-1974 | Medicine Hat, Alberta | From Dave Spencer of Alberta. National Porcelain was established in 1947. In the late 1940's, the business was sold to National Products of Winnipeg, Manitoba. Motor Coach Industries of Winnipeg, the parent company of National Products was sold to Greyhound Bus Lines in 1959 who promptly put the company on the market. Medicine Hat Brick and Tile, subsequently renamed I-XL Industries in 1971, bought the company and made it a division on May 1, 1959. The plant was destroyed by fire in 1974 and not rebuilt. |
| National Telegraph Co. | Minneapolis, MN | The president of the company, E. G. Simmons, designed the Kenosha hook insulator circa 1872. | ||
| National Telegraph Works | 1891-? | Birmingham, England | Company owned by Slater Lewis to manufacture and supply various equipment including insulators to telegraph companies | |
| Neman (Glass-works) Ltd | 1883-present | Beryozovka, Republic of Belarus (Russia) | In 1883 the followers of masters from the famous Diatkovo factory J. Stolle and V. Kraevski organized the production of glass on the picturesque bank of the river Neman. A small factory with one glass melting furnace and twenty workers producing pharmaceutical and brewer’s ware. They produce small glass insulators in various colors including cobalt blue. | |
| New England Electric Co. | N.E.E. Co. | Littleton, CO | Electrical supplies; knobs and cleats | |
| New England Glass Co. | 1818-1888 | Cambridge, MA | Threadless insulators were made in the c.1846-1850 period for Ezra Cornell | |
| New England Glass Mfg. Co. | N.E.G.M.Co. | 1898-1900 | Boston, MA | Manufacturer of glass insulators |
| New England Tel. and Tel. Co. | N.E.TEL. & TEL.CO.; N.E.T. & T. CO. | 1883-?? | New England area | Various glass insulators embossed "N. E. TEL. & TEL. CO." |
| New Granite Glass Works | 1861-1871 | Stoddard, NH | Telegraph and lightning rod insulators; plant destroyed by fire | |
| New Haven Clock Co. | circa 1890 | New York, NY | Electrical supplies, rubber ramshorn, Union Porcelain Works standard porcelain, glass insulators | |
| New Haven Porcelain Co. | 1925-1929 | New Haven, WV | Purchased from West Virginia Porcelain Co. and later sold to Superior Porcelain Co. | |
| New Haven Porcelain Co. | 1964-? ? | New Haven, WV | Purchased from Superior Porcelain Co. | |
| New Jersey Porcelain Co., Inc. | 1920-present | Trenton, NJ | Stephen Wenczel founded New Jersey Porcelain in 1920. The firm produced bathroom accessories and electrical porcelain. They are still operating out of their original plant at 100 S. Plum Street making electrical and refractory porcelain, sockets, fuse bases, porcelain bath accessories, switchplates and cabinet hardware. | |
| New Lexington High Voltage Porcelain Co. | 1903-1912 | New Lexington, OH | Manufacturer of porcelain insulators. Construction was begun in 1902. Arthur S. Watts worked for the company 1903-1904 after leaving Bell Pottery Co. The book A Brief History of Perry County, Ohio states: "The projectors and owners are all local men noted for their business ability and acumen. The Board of Directors is composed of: A. Bringardner, Asbery Garlinger, Dr. G. S. Courtright, Judge Maurice H. Donahue, and Dr. J. G. McDougal. Judge Donahue is president and Mr. T. J. Weiland secretary and treasurer. Mr. Guy G. Jackson is the electrical engineer and manager of the sales department. Mr. Brown is foreman." (see article 8619). | |
| New Zealand Insulators | NZI | Manufacturer of porcelain insulators | ||
| Newark Electrical Supply Co. | Newark, NJ | Electrical supplies | ||
| Newell Porcelain Co., Inc. | 1955-2005 | Newell, WV | Company was purchased in 2005 by PSN Components, Poughkeepsie, NY. Currently manufacturers porcelain line post and station post insulators. [www.newellporcelain.com] | |
| Newell-PSN | 2005-present | Newell, WV | The Newell Porcelain Co., Inc. plant was purchased by PSN Components and name changed; however, the plant is still known as Newell Porcelain Co., Inc. [www.newellporcelain.com] | |
| NGK Insulators, Ltd. | Japan | |||
| NGK-Locke Polymer Insulators, Inc. | 1993-present | Virginia Beach, VA | NGK manufacturer for all US sold polymer high voltage insulators. | |
| NGK-Locke, Inc. | 1965-present | Sales of porcelain insulators from Locke Insulators, Inc., Baltimore, MD and polymer insulators from NGK-Locke Polymer Insulators, Inc., Virginia Beach, VA. NGK-Locke, Inc. began its operation in the United States in 1965 under the name of NGK Insulators of America, Inc., as an exclusive sales division of NGK Insulators, Ltd., Japan. The name became NGK-Locke, Inc., when a joint venture between General Electric and NGK was formed. They sell products manufactured by NGK Japan, China, Indonesia, and our U.S. affiliates, Locke Insulators, Inc., Baltimore, MD, and NGK-Locke Polymer Insulators, Inc., Virginia Beach, VA. Product lines include electrical insulators, electrical equipment and transmission line insulator/hardware assemblies. | ||
| Nilson Porcelains, Pty, Ltd. | Melbourne, Australia | |||
| Nord-Verre (North Glass) | 1958-1959 | Reims, France | From Charbonneaux and others; merged with L'Electro-Verre to form SEDIVER | |
| Norek Technique Fabricken | Norway | |||
| North American Glass Co. | 1883-1891 | Montreal, Quebec | Former Excelsior Glass Co. Name changed in 1892 to Diamond Glass Co. and in 1902 to the Diamond Flint Glass co. | |
| Northern Electric Co. | Montreal, Quebec | Electrical supplies, Thomas standard porcelain, tubes, Hewletts and pintypes, Hemingray, Dominion, Electrose, Canadian Porcelain Co. | ||
| Northwestern Electric Equipment Co. | New York, NY | Electrical supplies, P&S tubes, standard porcelain, fireplugs, White strains, Brookfield, Thomas, Pittsburg, Holmes tree insulator, Westinghouse | ||
| Noti Insulator Co. | 1895-? | Syracuse, NY | The company was formed by Albert Vickers and William Dibb of Syracuse, NY to sell a no-tie insulator based on their patent 546,585 granted in 1895. One trade journal article shows a photograph of a glass version of this insulator, so it is assumed that some production was made, but no known examples have been reported. | |
| Novelty Glass Co. | 1901-1903 | Elmer, NJ | On February 9, 1910, the Novelty Glass Co. was incorporated and took over operations of the Gilchrist jar plant in Elmer, NJ. Knowles and Star insulators were made here, perhaps as late as 1907. The plant was closed in 1903 due to the Brookfield patent infringement suit regarding insulator machines. Plant was sold to the new Elmer Glass Co. in 1904. | |
| Novelty Works | Pittsburg, PA | The Reid book mentions the company in discussing one of Ezra Cornell's projects: "The Novelty Works also, at Pittsburg, Pa., made great quantities of the brimstone insulator, which consisted of an iron hat filled with hot brimstone, into which an iron stem, with hook, was held until cooled." | ||
| Oakman Mfg. Co. | 1890-1897 | Boston, MA | Samuel Oakman | |
| Ohio Brass Co. | OB in an oval; O. BO. Co. | 1907-1970's | Akron, OH | Purchased Akron HP Porcelain Co. in 1907 |
| Ohio Insulator Co. | 1910-1920's | Barberton, OH | The company was originally Akron High-Potential Insulator Co. The entire production of that company was sold to Ohio Brass until OB took complete ownership in 1910 and change the company name to Ohio Insulator Co. Akron Smoking Pipe Co. purchased their third rail business in 1905 | |
| Ohio Porcelain Co. | O. P. Co. | 1897-1913 | East Liverpool, OH | |
| Ohio Valley Glass Co. | O.V.G.CO. | 1903-1905 | Pleasant City, OH | This factory operated for a rather short period of time, but nevertheless produced a fairly large number of insulators that are found frequently throughout much of the U.S. Most commonly found types are CDs 106, 112 and 145. The embossing consists of the initials "O.V.G.CO." (Note: Another company with the same name operated in Bridgeton, Ohio circa 1881-1888. That company produced fruit jars with an OVGCO monogram, and had no connection with the later one in Pleasant City which produced insulators. |
| Oliver Electrical Mfg. Co. | OLIVER | Battle Creek, MI | Made/sold porcelain aerial line spacers in 1960's | |
| Oliver Iron & Steel Co. (Corp.) | 1863-present | Pittsburg, PA | In 1896, James B. Oliver was granted patent 566,468 for a steel insulator bracket that was assigned to this company. | |
| Onondaga Pottery Co. (Syracuse China Co.) | 1871-present | Syracuse, NY | The company was founded in 1871 as the Onondaga Pottery Co. in Geddes and named after Onondaga County to celebrate the region's Native American population, according to a Syracuse China biography distributed by Libbey. In 1871, 16 businessmen who had purchased a struggling local pottery company incorporated that company, raised $50,000 in capital, and expanded its product line to include "earthenware" for table and toilet use. A 1944 patent application for a land mine was granted in 1949 (see patent 2,479,861). | |
| Ontario Glass Co., Ltd. | Kingsville, Ontario | [see article 1735] | ||
| Opalescent Glass Co. | 1888-to date | Kokomo, NJ | Insulators made 1888 to 1896 | |
| Orient Ceramics | modern | Virddhachalam, India | Manufacturer of porcelain insulators | |
| Organization of Telephones of Ellas | OTE | Greece | Manufacturer of porcelain insulators | |
| Osaka Togyo Kaisha, Ltd. | OTK | 1920-?? | Osaka, Japan | Manufacturer of porcelain insulators |
| Owens-Illinois Glass Co. | 1933-1967 | Muncie, IN | Owens-Illinois was the product of a merger in 1929 of two large glass companies, the Illinois Glass Company (of Alton, Illinois), and the Owens Bottle Company which was headquartered in Toledo, Ohio. After the merging, the total number of plants owned by Owens Illinois numbered more than 20 in several states, with each assigned a plant code number. In late April 1933 Owens Illinois bought the Hemingray Glass Company plant in Muncie, Indiana, and it then became Owens Illinois plant #26. Glass insulators were made by Owens-Illinois at Muncie (carrying the Hemingray name) until 1967. | |
| Oy Wartsila Ab Turku Pottery | Turku, Finland | |||
| Pacific Glass Works [see Electrical Construction & Maintenance Co.] | E.C. & M.CO. | 1862-1876 | San Francisco, CA | Either this factory or the San Francisco Glass Works was in all probability the manufacturer of the E.C.& M.CO. insulators. Merged with San Francisco Glass Works to form the San Francisco & Pacific Glass Works in 1876. |
| Paisley (S. T.) | Beaver Falls, PA | Samuel Theodore Paisley | ||
| Paiste Co. (H. T.) | H.T.P. Co.; entertwined letters H.T.P.Co.; MULTIPO; PAISTE | Philadelphia, PA | Electrical supplies | |
| Paragon Electric Co. | PARAGON | c. 1900?-1920's? | Chicago, IL | The 1921 EMF Electrical Year Book said the company manufactured grounding devices, battery boxes, time switches and insulators. Address was Old Colony Bldg. in Chicago with factory in Manitowoc, WI. President, E. M. Platt; secretary, E. V. Platt. They sold the patented "Paragon knob" (see patent 965,723). |
| Parker (J. H.) & Son, Inc. | BENBOW; COLONIAL; DETROIT; DOUBLEX; DYKE; GRIP-IT; J. H. P. & S.; MULLER, MURDOCK, NAILIT; SCREWIT | c. 1900?-1920's? | Parkersburg, WV | Electrical supplies, Locke, New Lexington pintypes. The 1921 EMF Electrical Year Book said the company manufactured porcelain and other insulations. President, J. H. Parker; secretary and treasurer, W. M. Parker. |
| Partrick & Carter Co. | 1870's-1890's | Philadelphia, PA | Electrical supplies, Chester CD 136.7, La Bastie, Brooks, spool | |
| Parvillee Freres & Cie (Parvillee Brothers & Company) | 1899-1949 | Cramoisy near Paris, France | Original factory in Cramoisy only made porcelain insulators; another in Saint-Genou (France) has never made insulators; another in Le Daumail (France) was only a laboratory. Glass insulators with logo PFC in a circle were made by subcontractors. | |
| Pass & Seymour Legrand | 1984-present | |||
| Pass & Seymour, Inc. | ALADDIN; FLUTO; GOLIATH; LITTLE GEM; P & S; PASSMOUR; SHURLOK; TULIP | 1890-1984 | Syracuse, NY | Manufacturer of two early pin-type insulators, U-141, U-146, made by the casting process. They also produced cleats, knobs, tubes, electrical receptacles, and switches, etc. (see patent 476,827) (see patent 483,771) The company incorporated in July 1901. Acquired in 1984 by a French Solvay company, Legrand and name was changed to Pass & Seymour Legrand. The 1921 EMF Electrical Year Book said the company manufactured electrical wiring devices. President, B. E. Salisbury; secretary and treasurer, J. W. Brooks. |
| Patent Self-Binding Telegraph Insulator Co., Ltd. | London, England | This company was formed on August 19, 1883 by J. Slater Lewis and his investors "To purchase the letters patent of Joseph Slater Lewis, of Birkenhead, for improvements in or relating to insulating apparatus for overhead telegraph lines and other wires for carrying electric currents." This statement was in the April 28, 1883 issue of The Telegraphic Journal and Electrical Review, page 361. | ||
| Patricio Sordo Sociedad Ananimo | PSSA | Mexico | ||
| Paulding, Inc. (J. I.) | J. I. P. INC.; PAULDING | New Bedford, MA | wiring devices | |
| Peach Porcelain Co. | 1929-1932 | East Liverpool, OH | Formerly the Adamant Porcelain Co. and then the T. V. Milligan Porcelain Co. Milligan left the company in 1929 after purchasing the idle Ravenswood Porcelain Co. plant from General Porcelain Co. At that time, company name was changed to Peach Porcelain Co. In 1932, from either name change or purchase, the company became Ceramic Specialties Co. The company went bankrupt in 1955. | |
| Pearson, James | 1880's | Chesterfield, England | Whittington Moor Potteries manufacturer of salt or dipped stoneware. 1883 advertisement in Berly's shows a type "Z" pottery insulator. | |
| Peirce Specialty Co. | Chicago, IL | Electrical supplies | ||
| Pennycuick, James | 1889-? ? | Boston area | (see Electrical Glass Corp. and Sandwich Cooperative Glass Co.) | |
| Perfection Glass Co. | Washington, PA | [see article 1735] | ||
| Perla Liza Industria Colombiana Materiales Electricos Limitada | 1983-?? | Bogota, Colombia | PELICME Ltda, managing partner of ZICME | |
| Peru Electric Mfg. Co. | P; PERU | 1892-1899?? | Peru, IN | The plant was originally founded in 1890 as the Peru Glass and Carbon Co. In 1892, Peru Electric Mfg. Co. was organized by J. O. Cole (president) and R. H. Bouslog (secretary, treasurer and manager). In 1893, the company moved across the Lake Erie and Western R.R. tracks to the vacant buildings of the former plant of B. F. Dow and Co., which was in business from November 1883 until the company closed its doors on January 1, 1887. Peru manufactured dry process porcelain switches, sockets, rosettes, cut outs, insulators, carbons, carbon batteries and electrical supplies. Only known pin-type is U-928B. In 1908 Peru Electric Mfg. Co. went into receivership. The business was purchased by C. H. Brownell, President of the Peru First National Bank. Brownell, the largest creditor, bought the business for $25,000, which was about $15,000 less than the indebtedness. In 1911, Brownell organized the Peru Electric Co., which manufactured similar porcelain goods as Peru Electric Mfg. Co. In 1918, Brownell leased the plant to E. F. Moeck who operated it at a loss. It was sold to Square D on April 9, 1920. |
| Petrie & Cie (Petrie & Company) | 1885-?? | Baudour, Belgium | Porcelain insulators | |
| Pettingell-Andrews Co. | P A Co. | 1888-1927 | Boston, MA | Electrical supplies, Brookfield, Locke glass and porcelain insulators, Holmes tree insulator, Brodie tree insulators, cleats, standard porcelain, P&S tubes, wooden cleats |
| PFC in a circle | France | See Parvillee | ||
| Pilkington Brothers, Ltd | 1826-1971 | Lancashire, England | Merged with Sediver | |
| Pinder, Bourne & Co. | 187?-?? | Burslem, England | Merged with Doulton in early 1878 (see article 5893) | |
| Pingxiang Porcelain Insulator Works | 1957-present | Pingxiang, China | ||
| Pioneer Glass Co. | Seattle, WA | The plant was started in 1904 under the direction of Joseph Buzby. | ||
| Pioneer Glass Works | 1888-?? | Denver, CO | The Oil, Paint and Glass Reporter reported in August 18, 1888 that a glass factory will be formed in Denver, CO. | |
| Pioneer Glass Works | 1888-1891 | Gate City (Birmingham), AL | A Pioneer Glass Co. advertisement from the March 7, 1889 issue of Pottery and Glassware Reporter mentions among it's product lines insulators. The company was reportedly purchased by G. C. Vanderbilt, of New Jersey, G. C. Kelley, I. R. Hockstadter, and others in February 1891. | |
| Pittsburg High Voltage Insulator Co. | PITTSBURG; r-e P | 1908-1922 | Derry, PA | The 1921 EMF Electrical Year Book said the company manufactured insulators and insulator accessories. President, H. P. Davis; vice-president, E. M. Herr; secretary, treasurer and general manager, C. M. Semler. It also stated "business established in 1905". Sold to Westinghouse in 1922. |
| P. L. M. Products | 1977-1987 | Cleveland, OH | The company name was found on an aerial spacer. The aerial spacer was patented on November 10, 1959. The company name was registered on February 7, 1977 (RN33543), renewed on January 20, 1982, but cancelled by operation of law on February 17, 1987 after a renewal notice was sent on October 15, 1986. The agent listed was The Scott & Fetzer Co., 14600 Detroit Ave., Lakewood, OH 44107. Raymond G. Horrocks was one of the patent assignors and president of PLM Products who said the spacers which they sold were made by another company. | |
| Porcelain Appliance Co. | circa 1925 | Cleveland, OH | Company was the patent holding and licensing company for 16 companies: Brunt Tile and Porcelain Company, Columbus, Ohio; Colonial Insulator Company, Akron, Ohio; Davidson Porcelain Co., East Liverpool, Ohio; Federal Porcelain Co., Carey, Ohio; Findlay Electric Porcelain Company, Findlay, Ohio; General Porcelain Co., Parkersburg, W. Va.; Mogadore Insulator Co., Mogadore, Ohio; National Electrical Porcelain Co., Carey, Ohio; J. H. Parker and Son, Parkersburg, W. Va.; R. T. Thomas and Sons Co., East Liverpool, Ohio; Wheeling Tile Co., Wheeling W. Va.; J. H. Parker, Parkersburg, W. Va.; R. G. Spencer, Carey, Ohio; H. R. Holmes, East Liverpool, Ohio; G. O. Anderson, Parkersburg, W. Va.; and J. E. Bicknell, Findlay, Ohio. An anti-trust suit was filed against the companies in October 1925 (see article 7623). | |
| Porcelain Electrical Mfg. Co. | Trenton, NJ | NJ records list the company charter was no longer in force in 1909. | ||
| Porcelain Insulator Corp. | PINCO | 1920-Dec. 1985 | Lima, NY | The company was formed by William F. Harvey in 1920 after purchasing the old Lima plant from Locke. The first insulators were produced in 1921. The plant was purchased by Industrial Ceramics, Inc. in December 1985 continuing to use the PINCO marking on insulators. They ceased the manufacture of pin-type insulators in 1987. |
| Porcelain Products, Co. | 1959-2001 | Carey, OH | Dry process only; renamed in 1959 as Porcelain Products Co. but still owned by Chance which sold the plant in 1963 to Clarken Co. of St. Louis (still operated as PPCo.); sold to Ceram Insulators which changed the name to PPC Insulators | |
| Porcelain Products, Co. | 1975-2001 | Knoxville, TN | Purchased from Knox Porcelain Corp.; sold to Ceram Insulators which changed the name to PPC Insulators | |
| Porcelain Products, Co. | 1999-2001 | Macomb, IL | Purchased from Cooper Power Systems; sold to Ceram Insulators which changed the name to PPC Insulators | |
| Porcelain Products, Inc. | P. P. Inc. | 1927-1956 | Parkersburg, WV | The company was formed with the merger on July 10, 1927 of Ravenswood Porcelain Co., General Porcelain Co., Findlay Electric Porcelain Co., National Porcelain Co., and Federal Porcelain Co. Company was sold to A. B. Chance |
| Porcelain Products, Inc. | ALLIGATOR; P; P in a circle | 1927-1956 | Carey (Findlay), OH | Dry process only; sold to A. B. Chance |
| Porter & Berg Co. | ||||
| Porter (H. K.) Co. | Pittsburg, PA | Electrical supplies, and plastic pintype insulator | ||
| Porzellanfabrik Hermsdorf-Klosterlausnitz | PHK (Australia only) | 1900-2000 | Hermsdorf and Klosterlausnitz (State of Thuringia), Germany | The company used the "PHK" trademark from 1900 to 1913. From 1913 to 1923 a "triangle with the letter H in it" was used. From 1923 on the famous tridelta trademark (three triangles) was used. The factory only just closed its doors in 2000. They exported porcelain insulators to Australia. |
| Porzellanfabrik Kahla, Filiale Hermsdorf Klosterlausnitz | Hermsdorf, Germany | |||
| Porzellanfabrik P. Rosenthall Co., A.-G. | ||||
| PPC Insulators | 2001-present | Macomb, IL; Knoxville, TN; Carey, OH | Macomb plant closed in 2004. The Carey plant is for assembly only with office in Tiffin, OH. There are porcelain manufacturing plants in Austria, Germany, Slovakia, Sweden, and Thailand as well as joint venture with WUXI Huaneng Ceram, China | |
| Price, Sons and Co. | 1880's | England | The 1885 Electricians' Directory stated company was insulator and battery jar makers at The Potteries, Bristol. | |
| Pringle Electrical Mfg. Co. | 1891-1920's? | Philadelphia, PA | The 1921 EMF Electrical Year Book said the company manufactured panelboards, switchboards, switches, steel cabinets, boxes, etc. Known for electrical supplies. Address was 1906-12 N. 6th St. President, secretary, treasurer, William T. Pringle; vice-president and general manager, Arthur K. Pringle. | |
| Prospect Hill Pottery Co. | c. 1910 | Trenton, NJ | A 1909 Trenton newspaper had an add for dust pressers in this company's electrical department. | |
| PSN Components | 1998-present | Poughkeepsie, NY | Company purchased the Newell Porcelain Co., Inc. in 2005. It is doubtful that porcelain insulators were produced at Poughkeepsie, NY. The company appears to be a supplier of insulators made in Korea and, since 2005, porcelain line post and station post insulators were made at their Newell, WV plant. They are a global manufacturer of high quality electro-porcelain insulators for medium and high voltage applications. PSN Components' insulators are currently used by Commonwealth Edison, The Southern Company, New York Power Authority, Orange and Rockland, and other major electric utilities. The new name, Newell-PSN, will be used for the Newell, WV plant. [www.psncomponents.com] | |
| PYREX [see Corning Glass Works] | ||||
| R. Good Jr. [see Colorado Glass Works] | ||||
| Raco Electrical Products Div, All Stell Co. | RACO | Chicago, IL | Porcelain insulators marked RACO were made by the Ceramic Specialties Co. for the RACO steel bracket | |
| Rajeev Industries | modern | Khurja, India | Manufacture of porcelain insulators. | |
| Randolph Insulator Co. | Newark, NJ | Incorporated in 1909 by Leonard M. Randolph, Edwin R. Lines and Theodore McCurdy Marsh. The company was to deal In general electric, machinery and apparatus, dynamos, motors, etc. | ||
| Rashtriya Electrical and Engineering Corp. | modern | New Delhi, India | Manufacturer of porcelain insulators | |
| Ravenswood Porcelain Co. | R; R. P. Co. | 1921-1927 | Ravenswood, WV | Company was started in 1921 by Charles Turnbull, general manager; C. E. Mason, president; and Mike E. Ginther, secretary. Turnbull learned the porcelain business in East Liverpool, OH and New Haven, WV. The company made only dry process porcelain insulators and sold a line of standard porcelain, knobs, cleats, tubes, etc. Also made contract insulators such as Sackett mine insulators, rack spools, etc. It was merged into Porcelain Products Inc. in 1927 along with five other companies. Turnbull then built, owned and operated the Ravenswood Novelty Works, makers of toy glass marbles until his death. Paul Cox then operated it until it closed in the late 1950's. The pottery property was purchased in 1929 by T. V. Milligan but remained idle until 1937. He had owned the T. V. Milligan Porcelain Co. in East Liverpool, OH from 1915 until selling it to Peach in 1929. Gus Trenle, former owner of Trenle Porcelain Co. in East Liverpool, bought the Ravenswood plant in partnership with H. W. Blake in 1937. The company name was Trenle-Blake China Co. making a line of hotel china until closing in 1965. It was purchased by Harold Compston, first employed by the plant in 1921, and operated the plant until closing in 1969. |
| Reconstructed Granite Co. | c. 1900 | New York, NY | Made third rail insulators from reconstructed granite for the New York subway. Blakey, Thomas Wilkinson Blakey and Courtenay Win received the John Scott Award in 1901 for reconstructed granite. They may have been the founders of the company. Address was 14 Dey St., NYC. (see patent 664,470) | |
| Reid Bros. | REID BROS. LONDON; C. LUNDY | 1880's | London, England | Company was located at 12 Wharf Road. The Journal of the Society of Telegraph Engineers and Electricians published in 1881 stated they were the sole licensees for Crighton's 1878 patent insulator (gb1878-0004696) for fixing wires without the use or aid of binding wire (see article 5365). See "Lundy, C." in this list. |
| Reliable Electric Co. | ACME | 1920's | Chicago, IL | Electrical supplies, switches, connectors, cutouts. Address was 3145 Carroll Ave. President, Wallace L. Cook; vice-president, Fred J. Wegg. |
| Rhein-Westfalishe Isolatoren Werke | Siegburg, Germany | |||
| Ricardo Dos Santos Gallo, Fo., Lda | 1949-?? | Marinha, Portugal | ||
| Richard Ginori Societa Ceramica | 1890's to present | Milan, Italy | ||
| Richmond Glass Works (Virginia Glass Mfg. Co.) | mid-late 1850's | Richmond, VA | Glass egg insulator | |
| Ridlon (Frank) Co. [see Frank Ridlon Co.] | ||||
| Riverside Knob Mfg. Co. [see Brunt (William) Pottery Co.] | ||||
| Riverside Mfg. Co. [see Brunt (H.) and Sons Co.] | ||||
| Robert Folwer, Ltd. | Sydney, Australia | |||
| Rosenthal Insulators, Selb | Selb, Bavaria | Porcelain | ||
| Rosenthal Technik AG | Bayreuth,, Germany | |||
| Rosenthal Technische Werke | Germany | Porcelain | ||
| Rosenthal-Stemag-Technische Keramic | 1971-?? | Germany | Merger of three divisions; porcelain | |
| Royal Electrical Specialty Co. | ?-1920's? | Chicago, IL | The 1921 EMF Electrical Year Book said the company manufactured high-tension and electrical specialties. President, C. R. Lininger; vice-president, C. H. Thomas; secretary, H. H. Herbert; treasurer, F. M. Utt. Address was 556-606 E. 40th St. Advertised glass floor tubes with external threads and hexagonal head. | |
| S. Fobes & Co. [see Fobes Supply Co.] | Electrical supplies; possible distributor of SF glass insulators | |||
| S. H. Supply Co. | early 1900's | Denver, CO | Electrical supplies, cleats, tubes, standard porcelain, small glass insulators | |
| Sackett Mine Supply Co. | SACKETT | Columbus, OH | Mining supplies | |
| SAG Ceramics Ltd. | South Africa | |||
| Sandwich Cooperative Glass Co. | Diamond-P; C.E.L.CO.; and Pettingell-Andrews | 1880's to 1890's | Sandwich, MA | James Pennycuick had insulators made based on his 1885 patent. Some embossed with P inside a diamond. (see Electrical Glass Corp.) |
| San Francisco Glass Works | 1865-1876 | San Francisco, CA | This factory may be the source of some of the E.C.& M.CO. insulators. SFGW merged with the Pacific Glass Works in 1876 to form the San Francisco & Pacific Glass Works (1876-c.1901). Insulators may likely date from after the merger as well. | |
| Santos Barosa & Co., Lda | Marinha, Portugal | |||
| Satraj Ceramics | modern | Khurja, India | Manufacturer of porcelain insulators | |
| Saunders (J. E.) & Co. | 1885-1970 | Cardiff, South Wales | ||
| Schomburg | (see Hermsdorf-Schomburg-Isolatoren G. M. B. H.) | |||
| Schweitzer & Conrad, Inc. | S & C | Chicago, IL | cutouts, wiring devices | |
| Security Insulator Co. | 1890's | New Jersey | Electrical cleats and knobs (see patent 480,011) | |
| SEDIVER | EIV (Europeenne d'Isolateurs en Verre) | 1959-?? | Saint-Yorre, France | Societe Europeenne d'Isolateurs en Verre |
| Seidlmyer Bros. Glass Works | 1880's-1891 | Long Island City, NY | Glass works was purchased by Homer Brooke, the New York mold maker, and will operate the works on glass insulators [see article 853] | |
| Seiler (Paul) Electrical Works | SEILER'S PATENT | San Francisco, CA | Electrical supplies. Paul Seiler obtained patent 187,183 for a glass insulator, CD 130.2, while he was employed by California Electric Works. | |
| Seyler Mfg. Co. | Pittsburg, PA | Electrical and pole line supplies; distributor for Locke. Address was 525 Aspen Ave. | ||
| Shaw Insulator Co. | 1928-?? | Berkeley Heights (Irvington), NJ | Manufacturer of Bakeline and plastic insulators. The company was founded by Louis E. Shaw who, in 1928, invented the transfer molding process of thermosetting materials. Address was 150 Colt St., Irvington, NJ. In 1920, he bought large interest in the Moorhead Laboratories in San Francisco which manufactured telephone and wireless supplies. The newspaper article (see article 7633) stated Shaw Insulator Co. was in Newark, NJ. In 1944 J. Harry Dubois became vice president of Shaw Insulator Company. | |
| Shay, Stephens & Co. | 1890's | Chicago, IL | Produced glass knobs for electric light construction as well as glass floor tubes, porcelain knobs, and pin-type glass insulators. | |
| Sheldon Foster Glass Co. | 1895-1913 | Gas City, IN | Possible manufacturer of Star and SF insulators. | |
| Siemens | ||||
| Siemens Brothers & Co., Ltd | England | Electrical Review (London) dated Sept. 16, 1882 stated this company manufactured the porcelain slot-top insulator based on the Capanema patent gb1873-0004171. | ||
| Siemens-Halske | 1847-?? | Berlin, Germany | The August 15, 1878 issue of The Telegraphic Journal (London) page 327 stated: "The firm have also a porcelain factory in Russia for the manufacture of insulators." The company (telegraph factory) was founded in 1847 by Ernst Werner Siemens (died in 1878) and Halske (retired in 1867). They also designed and manufactured the metal clad insulators used all over the world. It was a porcelain shell cemented in a cast iron cover with sulfur. The cast iron cover had a bracket to attach the insulator. The earliest version, U-1966, had a ramshorn cemented in the porcelain shell to secure the conductor. | |
| Siemens-Schuckertwerke Aktiengesellschaft | Berlin-Siemensstadt, Germany | |||
| Silver (S. W.) & Co. | 1860's | Silvertown, London, England | They produced their patent ebonite insulators for the associated two-wire overhead land line in South Wales. The iron-wire armour was provided by Glass, Elliot & Company of Greenwich, London. In total it possessed 454 miles of wire, being 50 miles of land line in South Wales and Ireland as well as the 62 mile underwater cable. | |
| Sissell Co. (Lloyd D.) | SISSELL | Los Angeles, CA | Rack spools | |
| S. K. M. Agencies & Industries | modern | Kolkata, India | Manufacturer of porcelain insulators. | |
| Smith & Stone, Ltd | S & S; SS in two diamonds | 1920-?? | Georgetown, Ontario | Address was 2 Glen Road. Only pin-type made was U-294A. |
| Smith Manual of Telegraph | Electrical supplies: CD 102, 131, ramshorn, glass block, La Bastie | |||
| Snyder-Hunt Co. | S-H Co. | |||
| Sociedad Anonima Fabrica Nacional de Vidrio | SAFNV | Uruguay | S.A.F.N.V. | |
| Societe Anonyme de Verrerie Industrielle (Limited Company of Industrial Glassmaking) | 1920-1970 | Masnieres, France | logo: SAVI in a circle | |
| Societe Anonyme Des Annciennes Usines De Fuisseaux, a Baudour (Limited Company of Former De Fuisseaux of Baudour) | Baudour, Belgium | |||
| Societe de Folembray | Parville, France | The 1904 St. Louis Electrical Handbook mentioned this company's "exhibit insulators for both high and low-pressure, telephone and telegraph work" on page 127. | ||
| Societe H. Parra Et. Cie. | Toulouse, France | |||
| Societe L'Electro Verre [see L'Electro Verre] | France | |||
| Societe Vedovelli Priestley | Paris, France | |||
| Southern Electrical Porcelain Co., Inc. | 1920-? | Erwin, TN | Listed in the 1921 EMF Electrical Year Book as a manufacturer of porcelain cleats, tubes, sockets, insulators, knobs, bushings, and other porcelain specialties. President and sales manager, J. S. Thorp; vice-president and general manager, J. W. Owen; secretary and treasurer, C. D. Davis. | |
| Southern Massachusetts Telephone Co. | So. Mass. Tel. Co. | 1878-1939 | SE Mass and Cape Cod | CD 102 embossed "So. Mass. Tel. Co." |
| Southern New England Electric Co. | Hartford, CT | Electrical supplies | ||
| Southern Porcelain Mfg. Co. | S. P. / COMPANY / KAOLIN / S. C. | 1856-?? | Kaolin, SC | The Southern Porcelain Manufacturing Co., established on June 5, 1856 at Kaolin, South Carolina (near Bath) by William H. Farrar, who had been a stockholder of the United States Pottery Co. in Bennington, VT. Numerous potters followed him here, the modeler, Josiah Jones, became manager in 1857, when the Charles Cartlidge & Co. factory closed (1856 at Greenpoint, NY), and next year (when Bennington also failed) Fenton was there briefly on his way to Peoria, Illinois, where he built an unsuccessful works. Until fire destroyed the factory in 1864, only 'a fair porcelain' was produced at Kaolin of white or cream-colored earthenware, high-fired ironstone, porcelaneous stoneware, true porcelain, and Rockingham-type wares, such as the coarsely designed Corn pitchers of 1859-61 [Barber, pp. 188-9]. During the Civil War, the company produced porcelain teapot insulators, U-989, U-990. Reference link: http://www.noteaccess.com/APPROACHES/DecorativeAA/PAmerican3.htm |
| Southern Porcelain Mfg. Co. | Kaolin, SC | See Southern Porcelain Co. At the outbreak of the Civil War the company was reorganized as the Southern Porcelain Manufacturing Company, which went into the extensive manufacture of porcelain and pottery telegraph insulators for the Confederate Government. | ||
| Specialty Porcelain Works | SPW; S. P. W.; S. P. W'KS. | early 1920's-1970's | East Liverpool, OH | Owned by John W. Boch, who worked for R. Thomas & Sons Co. leaving in 1907. The plant is located on the west side of Pearl St. at Michigan and Elizabeth Streets. At one time produced standard porcelain with the S. P. W. marking. The company was listed in the 1922 Journal of the American Ceramic Society under the direction of J. W. Boch. |
| Spratt (James) | early 1850's-?? | Cincinnati, OH | Lightning rods, points, and insulators | |
| Square D Co. | SQUARE D; D inside a Square | 1922?-1957 | Peru, IN | The plant was in operation as early as January 1923 per the Journal of American Ceramic Society of that date. A. P. Ball was Asst. General Manager. 1957 date from history of Akron Porcelain & Plastics Co. which took over some of their dry pressed business at that time. The 1921 EMF Electrical Year Book said the company had a factory at Peru, IN, so that plant probably dates a few years before 1921. |
| St. Johns Glass Co. | 1875-1877 | St. Johns, Quebec | ||
| St. Louis Lightning Rod Co. | KRETZER BRAND | St. Louis, MO | Lightning rod accessories | |
| Standard China Works | 1870's-?? | Trenton, NJ | The company was the only one in Trenton which made door knobs. This company name was not shown in the NJ listing of incorporated companies. In 1881, 1882 and 1900 city directories, Warren Kimble was the proprietor with address on Prospect Ave at Stuyvesant Ave. In 1898, products were hardware and electrical goods. In 1908, company was headed by J. C. Sharkey (formerly treasurer of Artistic Porcelain Works) and apparently ceased manufacture of electrical porcelain (see ID 5929). The company was listed in a Trenton newspaper in 1917 as Standard China Co. See "Warren Kimble". By 1920, the plant was operated by Connecticut Electric Mfg. Co. | |
| Standard Glass Insulator Co. | 1893-1894 | Boston, MA | Lawrence B. Gray patented process | |
| Standard Electric Mfg. Co. | STANDARD | 1911-1920's? | Chicago, IL | Outlet bushings, switches. The 1921 EMF Electrical Year Book said the company address was 925-941 Wrightwood Ave. President, L. E. Parker; vice-president, E. Parker; secretary and treasurer, T. L. Parker. |
| Standard Porcelain Co. | 1905-c. 1920's | New Cumberland, WV | Plant was started by A. L. Dyke (former manager of the Akron Insulator & Marble Co.). There were eight kilns with electric porcelain as the chief product. It was probably one of the plants taken over by the formation of General Porcelain Co. The company was listed in the 1922 Journal of the American Ceramic Society under the direction of Harry Yeates. | |
| Standard Electrical Mfg. Co. | STANDARD; STANDARD ELEC. MFG. CO. | Cleveland, OH | Outlet bushings | |
| Standard Vitrified Conduit Co. | New York, NY | Third rail composition insulators | ||
| Stanley & Patterson | PATTERSON | New York, NY | specialties | |
| Star Glass Works | 1869-c. 1880 | New Albany, IN | David Whitten wrote: Gerald O. Haffner in The Glass Industry of New Albany (1983:44), indicates insulators were produced here, apparently referring to contemporary newspaper articles. However, no actual insulators are confirmed to exist that were made by this factory, as far as is known to collectors. If any exist they would be, at present, still unattributed examples. Star Glass Company became the W. C. DePauw Glass Company (aka DePauw's American Plate Glass Works) before 1880, and operated under that name until the summer of 1893, when the plant closed down production. Occasional brief re-starts evidently occurred as late as 1895 or 1896, but for all practical purposes, the Panic of 1893 led to the demise of this factory. Most of their product consisted of plate and window glass (and fruit jars) in later years. (NOTE: None of the insulators with the embossed "star" markings were manufactured here. They are of a somewhat later era and were made by (principally) three glass companies: Novelty, Sterling, and Harloe). | |
| Star Porcelain Co. | IDEAL; STAR; 5-point star | 1899-2003 | Trenton, NJ | The company was incorporated on July 24, 1899. Agent was listed as John K. Britton with company located on Muirhead Ave. Owner was Dr. Charles P. Britton, a druggist, who sold his drug store in 1900 in order to devote all his time to the pottery to manufacture electrical goods. Other owners were Dr. Thomas H. Mackenzie and Herbert Sinclair. Plant was located on Muirhead Ave near Dewey. Company made electrical porcelain and specialties. Advertized black glazed porcelain in EWE Dec. 30, 1905. The Trenton Times dated July 20, 1901, said the plant was being built on Meade St. This was probably a new location. Plant was closed in 2003. See Feb. 2008 CJ pages 39-43 for views in the defunct factory. |
| Steatit Magnesia | Germany | Merged into Rosenthal-Stemag | ||
| Steatite & Porcelain Products Ltd. | Great Britain | |||
| Steel City Electric Co. | CAMPBELL | Pittsburgh, PA | receptacles | |
| Sterling Glass Co. | STERLING; £ | June 1902-March 1903 | Elmer, NJ | STERLING, £, and some of the embossed star insulators |
| Steward (D. M.) Mfg. Co. | LAVITE | circa 1900-1920's | Chatanooga, TN | Manufacturer of "Lava" and "Lavite" insulators (see American Lava Corp.) |
| Stiff (James) & Sons | 1751-1880's | Lambeth and London, England | Manufacturer of telegraph insulators in brown or white including J. Slater Lewis self-binding insulator (like CD 110.5, CD 110.6 and U-2021). The 1883 Telegraphic Journal and Electrical Review (London) stated they were making the Slater Lewis self-binding (screw-top) insulator. The 1885 Electricians' Directory said they made porous cell and plate, battery jars, and insulators located at High Street, Lambeth, S. E. | |
| Stewart (Frank H.) Electric Co. [see Frank H. Stewart Electric Co.] | ||||
| Stewart-Howland Co. | SHCo entertwined logo | Boston, MA | Standard porcelain. Piece of a cleat with this logo was found at Electric Porcelain Co. plant in East Liverpool, OH. | |
| Stickla Turda | Turda, Romania | |||
| Stocker & Co Telephon und Telegraphenwerke | ||||
| Stromberg-Carlson Telephone Mfg. Co. | Rochester, NY | Electrical and telephone supplies, Hemingray, Pittsburg, Cutter, standard porcelain, tubes, telephone listening device | ||
| Stuart-Howland Co. | Boston, MA | Electrical supplies. The 1921 EMF Electrical Year Book said the company was located at Congress and Purchase Streets. President and treasurer, Guilford M. Stuart. | ||
| Suisse Langenthal | Langenthal, Switzerland | |||
| Summit Porcelain Co. | The company was listed in the 1922 Journal of the American Ceramic Society under the direction of Anthony Comfort. | |||
| Sun Electric Insulator & Apparatus Manufacture-Ltd | Liling, Hunan, China | |||
| Sun Electrical Co., Ltd. | London, England | Electrical supplies, British pintypes, knobs, cleats, tubes | ||
| Sun Porcelain Co. | 1905-1911 | Trenton, NJ | Incorporated on November 13, 1905 and located on Oakland Street. Agent was listed as Alfred G. Grainger. Capitalization was increased to $750,000 on April 24, 1911. Merged into General Porcelain Co. on May 12, 1911. | |
| Sunshine Potteries | Melbourne, Australia | |||
| Superior Porcelain Co. | 1905-1910 | New Cumberland, WV | Sold to U.S. Electric Porcelain Co. | |
| Superior Porcelain Co. | S.P.; S. P. Co.; SUPERIOR | 1929-after 1973 | New Haven, WV | Purchased from New Haven Porcelain Co. |
| Suzhou Porcelain Insulator Works | 1945?-present | Suzhou, China | ||
| Syndenham Glass Co. | Wallaceburg, Ontario | |||
| T. V. Milligan Porcelain Co. | ADAMANT | 1915-1929 | East Liverpool, OH | Formerly Adamant Porcelain Co. plant purchased by Harry Peach and George Reid. The plant was destroyed by fire in WW I. Milligan left the company in 1929 after purchasing the idle Ravenswood Porcelain Co. plant from General Porcelain Co. At that time, company name was changed to Peach Porcelain Co. In 1932, from either name change or purchase, the company became Ceramic Specialties Co. The company went bankrupt in 1955. |
| Taruna Dechome Private Limited | modern | Bikaner, India | Manufacturer of porcelain insulators | |
| Tasker, Sons & Co. | Sheffield, England | 32 Angel St.; India rubber insulators | ||
| Taylor, Goodhue & Ames Co. | Oct. 1892-?? | Chicago, IL | Electrical supplies | |
| Taylor, Tunnicliff & Co. Ltd. | 1867-1959 | Hanley, Staffordshire, England | This firm, which has achieved world fame in the manufacture of high-grade ceramics for the electrical industry was founded in the year 1867 by Thomas Taylor and William Tunnicliff for the purpose of making specialized pottery articles. Operations were started at a small factory at Shelton, which soon became inadequate to meet demands and its activities were transferred to much larger premises at Eastwood, Ltd, Hanley (more recently enlarged by adjacent buildings housing well-equipped laboratories) which, to this day, remain the Registered Offices of the group of firms controlled by Taylor Tunnicliff (Electrical Industries) Limited. To increase production capacity, factories were built at Stone and Longton, and in 1938, the Holding Company, under the Chairmanship of Sir John Kent, C.B.E., was formed to control the Companies in the Taylor Tunnicliff group comprising: Taylor Tunnicliff & Co. Ltd., Hanley and Stone; Taylor Tunnicliff (Refractories) Limited, Longton; Electric & Ordnance Accessories Co. Ltd., Shelton; with a majority holding in Electric Transmission Ltd., at Etruria. In 1959, Merged with Bullers Ltd to form Allied Insulators Ltd. The Hanley plant closed in 1972. | |
| Teal, Frank C. Co. | ||||
| Technical Ceramics Lava Corp. | ||||
| Telefunken Geselleschaft fur Drahtlose Telegraphie m. b. H. | Berlin, Germany | Patented heavy glass radio strain | ||
| Telegraph Insulator Co. | 1880's | England | The 1885 Electricians' Directory stated they were insulator makers located at 28 Hamilton Street, Birkenhead and that they were "owners of J. Slater Lewis's Patents". | |
| Telegraph Mfg. Co. | 1880's-1902+ | London, England | Company was located at Helsby near Warrington and 29 Queen St. | |
| Temiskaming & Northern Ontario Railway | T. & N. O. Ry. | 1902-1941 | Canada | Under-glaze ink marking, T. & N. O. Ry, found on porcelain Canadian beehives |
| Thames Glass Works | 1863-1865 | New London, CT | Threadless insulators | |
| Theodor Pohl Zacler | TP | Zacler, Czech Republic | Manufacturer of porcelain insulators | |
| Thomas (R.) & Sons, Co. | THOMAS; T; R. T. & S. CO. | 1884-1927 | East Liverpool, OH | Door knobs, Standard Porcelain, ribbed trolley supports, pintypes. Address was West Seventh St. Original company was American Knob Works founded in 1873. Company was reorganized and expanded in 1884 as the R. Thomas & Sons. First low-voltage insulators were produced in 1884. In 1892, the company expanded by purchasing the Westinghouse Electric Co. porcelain plant and incorporated under the name R. Thomas & Sons Co. In 1905, the company was heavily into making insulators for the rapidly expanding high-voltage market and had outgrown the East Liverpool plant. At that time it expanded by purchasing a small plant in Lisbon. The 1921 EMF Electrical Year Book listed the president as George W. Thomas; secretary, Atwood W. Thomas; treasurer, Lawrence M. Thomas; general manager, H. R. Holmes. |
| Thomas (R.) & Sons, Co. | THOMAS | 1905-1957 | Lisbon, OH | In 1905, Thomas purchased the Thomas China Co. plant from family member, A. G. Mason. The plant was converted to produce porcelain insulators. In 1918, the plant was converted to a large, modern insulator manufacturing plant. In 1957, the company was purchased by the H. K. Porter Co. and absorbed into its Delta-Star Electric Division. |
| Thomas China Co. | 1901-1905 | Lisbon, OH | Did not make insulators. They made dinner and toilet sets in semi-porcelain, hotel wares, jardinieres, and specialties. In 1905, the company was purchased from A. G. Mason by the R. Thomas & Sons Co. | |
| Thompson-Houston Electric Co. | T-H.; T-H. E. CO. | 1883-1892 | The Thomson-Houston Electric Company was created in 1883 when Elihu Thomson's American Electric Company and the interests of Edwin Houston merged into a single company. In 1892, Thomson-Houston merged with the Edison General Electric Company to form the General Electric Company. This electrical supply company had glass insulators embossed with "T-H." and "T-H. E. CO." | |
| Tillotson (L. G.) & Co. | L.G.T. & CO. | ?-1880 | New York, NY | Electrical supplies, CD 131, battery insulator. Address up to 865 was No. 16 Broadway; 1865-1868 at No. 26 Dey St.; 1868 to about 880 at No. and No. 8 Dey St. for office, salesroom and warehouse and manufactory at 139, 141, 143 Centre St. In 1880, taken over by E. S. Greeley & Co. at the Dey St. address. |
| Tower-Binford Electric & Mfg. Co. | Richmond, VA | Electrical supplies | ||
| Transadean Associates, Inc. | New York, NY | Telephone transposition brackets | ||
| Trans-Canada Railway Co. | TCR | 1892-? | Canada | Incorporated in 1892. |
| Trenle Porcelain Co. | TRENLE; T. T. P. Co. | 1917-1920's | East Liverpool, OH | The company was founded by S. Turnbull, J. Doekin, E. J. Owen, and Gus A. Trenle. Located on the north side of Railroad St. east of Boyce St. The East End Pottery Co. was started in 1894 on this site. Name changed to East Liverpool Potteries Co. in 1903 and then East End Pottery Co. in 1905. Later became East End China Co., Trenle China Co. and then refitted in 1917 as the Trenle Porcelain Co. to produce electrical porcelain. Ohio records show the name of Trenle China Co. was changed on June 24, 198 to the Trenle Porcelain Co. The company was listed in the 1922 Journal of the American Ceramic Society under the direction of G. A. Trenle and H. W. Blake. The 1921 EMF Electrical Year Book said the company manufactured porcelain knobs, tubes, and cleats. The address was P. O. Box 493. President, G. A. Trenle; vice-president, H. D. Brookman; secretary-treasurer, H. W. Blake. It also stated "business established 1893", which refers to the East End Pottery. |
| Trenton China Co. | 1859-1891 | Trenton, NJ | The 1901 book, The Pottery and Porcelain of the United States, stated the company was incorporated in 1859. The works were closed in 1891 under the management of Frederick A. Duggan. Another source said the company was incorporated on November 10, 1880 with $40,000 with James Moore as president and located on 3rd Street. Capital stock was increased to $100,000 on September 10, 1883 and again to $200,000 on December 16, 1887. In 1882, Thomas Bell, president; Charles Cadwallader, secretary; James Clark, treasurer. The company was in the hands of a receiver in June 1891 and purchased by Thomas Maddock & Sons on May 11, 1892. Frederick A. Duggan and B. B. Dinsmore left after the failing in 1891 and founded Imperial Porcelain Works for the manufacture of electrical porcelain. | |
| Trenton Porcelain Co. | JIFFY; BUCKEYE; FINDLAY | 1902-1920's? | Trenton, NJ | Incorporated on January 7, 1902 with capital stock of $100,000 and located on corner of Prince and Mead St. At that time the agent was shown as George F. Fell. Manufactured standard porcelain, Findlay knobs, and cleats. In 1921, the officers were E. H. Freeman (president), George E. Maguire (sec-treas) and P. T. Bradley (sales manager). This agrees exactly with the officers of E. H. Freeman Co. Listed in the 1921 EMF Electrical Year Book as a manufacturer of porcelain cleats and other electrical porcelain products with address of 803 E. State St. This is the same address as E. H. Freeman Electric Co. in the same book. President, B. H. Maguire; secretary and treasurer, George E. Maguie. Factories in New Brunswick and Trenton, NJ. |
| Trenton Potteries Co. | 1892-? | Trenton, NJ | The plant was started in 1868 under the name Coxon and Thompson. It was known as the Empire Plant. Company was incorporated on May 28, 1892 with capitalization of $3,000,000. Address was 309 N. Clinton Ave. President and General Manager was John A. Campbell. The company took over operations of the Empire, Enterprise, Delaware, Equitable, and Crescent potteries and also built the Ideal pottery. Certificate relative to additional capital stock on June 22, 1892. Amended certificates on July 1, 1902 and June 23, 1903. | |
| Trumbull Electric Mfg. Co. | T in a circle | ?-1920's? | Plainville, CT | The company was listed in the 1922 Journal of the American Ceramic Society under the direction of J. M. Gilfillan. The company made electrical porcelain and plumbing fixtures. The 1921 EMF Electrical Year Book said the company manufactured wiring devices. President, J. H. Trumbull; vice-president, F. T. Wheeler; secretary, S. S. Gwillim; treasurer, Henry Trumbull. Factories in Plainville, CT and Trenton, NJ. |
| Turner Tunnicliff & Co. | England | Mentioned in index to Keith Neal's book | ||
| Turku Potteries | Turku, Finland | |||
| Union Electric Co. | Pittsburgh, PA | Electrical supplies, White strains, mine insulators, standard porcelain, Hemingray, Lapp | ||
| Union Electric Co., Inc. [see Union Electrical Porcelain Works] | 1865-present | Trenton, NJ | The 1921 EMF Electrical Year Book said the company manufactured wiring devices. President, J. D. Mackenzie; vice-president, Duncan Mackenzie; secretary and general manager, W. I. Peacock; treasurer, T. Mackensie. Address was Hamilton and Clark Streets. | |
| Union Electrical Porcelain Works | 1865-present | Trenton, NJ | Union Electric Co. was started in 1865 by the MacKenzie family. In 1898, they made standard and special porcelain electrical supplies. In 1903 the name was changed to Duncan MacKensie Sons' Co. In 1920, it was owned/operated by Duncan MacKensie Sons' Co. which included J. D. Mackensie as president, Duncan MacKensie as vice-president, T. MacKensie as treasurer, and W. I. Peacock as secretary and general manager. The plant was destroyed by fire on January 20, 1920, and rebuilt. It was located at Hamilton and Clark streets until the plant was moved in 1924 to 31 Muirhead Ave., which was the location of the old Greenwood Pottery Co. At that time, the company was incorporated and name changed to Union Electrical Porcelain Works. In 1959, the company was reincorporated as Union Electrical Porcelain Co. Present location is at 31 Muirhead Ave. in Trenton. In the 1927 McGraw-Hill Electrical Trade catalog, the president and treasurer was listed as Joseph W. MacKensie. The made radio antenna insulators, spools, sockets, etc. | |
| Union Porcelain Works | eagle with snake in its mouth and U. P. W. | 1864-1912 | Greenpoint, NY | The plant was started just prior to the Civil War by some German potters who made bone china for three years. In 1860, the plant was sold to Thomas C. Smith of Brooklyn and C. H. L. Smith. Thomas also had interests in Tallapoosa, GA and was president of the Seventeenth Ward National Bank of Brooklyn. Greenpoint was a village adjoining Brooklyn. Thomas Smith did not intend to keep the plant until he traveled abroad and learned how to make hard porcelain. In 1864, bone china was dropped and the name was changed to Union Porcelain Works. Products were tableware, hardware trimmings and some art work. The office and wareroom was located at 300 Eckford St. Company started making electrical insulators in the early 1880's and after Empire China Works began making electrical porcelain (1879). See standard porcelain in New Haven Clock Co. catalog dated 1889-90. In the 1880's, a green under-glaze ink marking was used consisting of an eagle's head with "S" in its beak. In 1901, they made "true hard porcelain in table services, decorative pieces, electrical insulators, and hardware trimmings". The incuse eagle logo with a "S" in its mouth was adopted in 1876 and green ink under the glaze was first used in 1877. The later marking also included "U.P.W." above the eagle. According to Lehner's book on US marks on pottery and porcelain, "The representation of an eagle's head with the letter S in its beak was filed for registration on May 4, 1877, by Thomas Smith and Sons. The "S" evidently stands for Smith. |
| Union Pottery Co. | 1869-1889 | Trenton, NJ | Company was incorporated in 1869 by Baltes Pickel, William White, Henry Smith, Joshua Jones, and Elias Cook. It was closed in 1889. Not sure if the same plant was reopened in 1901. The New Jersey Pottery, started in 1879, was reorganized in 1883 under the name Union Pottery Co., so there must have been two Union Pottery plants at this time. | |
| Union Pottery Co. | 1901-?? | Trenton, NJ | Incorporated on March 22, 1901 with capital of $500,000 by John E. Donnelly, Joseph Gilley, and Charles Weil. NJ records show Union Potteries Co. charter was no longer in force in 1908. | |
| U.P.R.R. | Union Pacific Railroad along with the Central Pacific Railroad (C.P.R.R.) completed the first transcontinental link in 1869. | |||
| United States Electric Porcelain Co. | US, USEPCo, U.S.P.Co. | 1906-1910 | Findlay, OH | Refitted the old Bell Pottery Co. plant to make white ware. In 1910, leased plant to Findlay Electric Porcelain Co. who later purchased the plant. Markings: monogram US, USEPCo and U.S.P.Co. |
| United States Electric Porcelain Co. | 1910-1911 | New Cumberland, OH | This plant was purchased from the Superior Porcelain Co. and sold to General Porcelain Co. | |
| United States Insulator Co. | 1914-?? | Company was incorporated on July 15, 1914 with $450,000. No evidence that a plant was actually built. | ||
| United States Potteries Co. | 1909-? | Trenton, NJ | Company was incorporated on November 12, 1909 and located at 83 Montgomery St. | |
| United States Pottery Co. | 1853-1858 | Bennington, VT | The company was formed on June 11, 1853 by Jason H. Archer, Henry Willard, Christopher Weber Fenton, Samuel H. Johnson, and Oliver A. Gager with Gager as the head of the company; however, at least two sources state the date as 1849 as explained below. In early 1843, Julius Norton and his brother-in-law Christopher Weber Fenton, formed a partnership, Norton & Fenton, that lasted until November 1847. After a fire that destroyed the stoneware factory on June 6, 1845, a new brick structure was built with a wing for Fenton to experiment with porcelain. After dissolution of the partnership, Fenton leased the wing. Norton continued his stoneware business. In 1848, Christopher Fenton was a member of the dry-goods firm Lyman, Fenton, & Park. A modest advertisement appeared in the Vermont Gazette, November 22, 1848, saying they were "manufacturers of every description of Rockingham, White Flint and White Earthenware, Crockery Ware -- East Bennington, Vt." Park withdrew in 1849, thus leaving the company as Lyman, Fenton & Co. Fenton's patent for coloring a glaze was granted on November 27, 1849. In 1850, Fenton put up his own building not far from the Norton works. Under the direction of Decius W. Clark (former stone potter for Norton) new buildings and three large double kilns were built at a cost of $15,000. The first kiln was fired on November 15, 1850. Lyman left the partnership before 1852. This is when Oliver A. Gage, a New York china merchant, became the active backer. In the early 1850's, most likely before U. S. Pottery Co. was formed, the Elliott flint insulators were produced -- by O. A. Gager & Co. They were made of "Flint Enamel Ware" consisting of kaolin from South Carolina, silica and Vermont clay. Insulators were used on telegraph lines in the Boston area. From 1901 book, The Pottery and Porcelain of the United States, page 172: "Among these specimens is a patented form, recommended by Mr. Batchelder, which has a shoulder with a re-entering angle of forty-five degrees; this angle causes the wind and rain to pass downward, and prevents the inside of the insulator from being wet." In 1953 the works were enlarged and six kilns were erected. The main building was 160 feet long. The Bennington factory was closed in May 1858 due to strained finances. Its 150 employees were paid at that time for the work they did during the winter of 1857-58. Elliott insulators were shown in a wood cut in Gleason's Pictorial dated October 22, 1853 of the exhibit at New York's Crystal Palace. An excellent account of the Bennington exhibit can be found in the "General Report of the British Commissioners on the New York Industrial Exhibition" in the section written by George Wallis, entitled "Report on Porcelain and Ceramic Manufacture". | |
| United States Telegraph Co. | U.S. Tel. Co. | 1860's | Formed on August 3, 1864 by the consolidation of three other compaies. Reid's book, The Telegrapher, describes the Type F glass insulator known as the "compromise" between the "egg" of the Magnetic Telegraph Co. and the well-known petticoat or umbrella type. | |
| Universal Clay Products Co. | U, UNIVERSAL | 1919-present | Sandusky, OH | The company was located at 1528 1st St. and manufactured dry pressed porcelain insulators in standard and special shapes both glazed and unglazed. They also made wet process porcelain insulators such as rack spools and wireholders. W. J. Frey was the president and general manager. Clay was mined from land leased near Perryville. (see article 7333) |
| Valverde Glass Works | 1896-1899 | Denver, CO | See Colorado Glass Works | |
| Varley, C. F. | 1861-1880's | England | British patents in 1860-1865 | |
| Venkateshwara Ceramic Industries | modern | Hyderabad, India | Manufacturer of porcelain insulators. | |
| Verbano Ceramics | Verbano, Italy | |||
| Verbano Porcellana di Laveno | Verbano, Italy | |||
| Vereinigte Glaswerke | VEGLA | 1936-?? | ||
| Verlica Belgium | 1940-1970 | Ghlin, Belgium | ||
| Verreries Charbonneaux (Charbonneaux Glassworks) [see Charbonneaux & Cie] | ISOREX | 1906-? | Reims, France | |
| Verreries d'Albi | VA | 1917-1960 | Albi, France | |
| Verreries de Folembray (Glassworks of Folembray) [see Folembray] | 1895-? | Folembray, France | ||
| Verreries de Islettes (Glassworks of Islettes) [see L'Electro verre] | 1919-WWII | Islettes, France | ||
| Verreries de Masnieres (Glassworks of Masnieres) [see Masnieres] | France | |||
| Verreries de Reims (Glassworks of Reims) [see Charbonneaux & Cie] | France | |||
| Victor Insulators Inc. | 1935-1953 | Victor, NY | ||
| Victor Insulators Inc. | 1984-present | Victor, NY | ||
| Vidrart, S.A. [see Cristalerias Rigolleau, S.A.] | ||||
| Vidreria Industria Figuerras Oliveiras S.A. | VIFOSA | San Paulo, Brazil | ||
| Vidriera Monterrey | Monterrey, Mexico | now Vitro Corp. | ||
| Vidrios Bogota | VI-BO | Bogota, Colombia | ||
| Virginia Glass Mfg. Co. | mid-late 1850's | Richmond, VA | ||
| Virginia Pottery Co. | Harrisonburg, VA | This old abandoned pottery was purchased and converted to an electrical porcelain plant in 1905 under the name Adamant Porcelain Co. A sister plant under this name was opened in 1904 in another abandoned pottery in Broadway, VA. Both Adamant Porcelain Co. plants may have been related to the plant by the same name in East Liverpool, OH, which opened in 1907. | ||
| Virginia Pottery Co. | New Lexington, OH | Merged into General Porcelain Co. about 1913. | ||
| Vulcanite Manufacturing Co. | 1890's | Lindenhurst, NY | Probably made rubber insulators. See The Brooklyn Daily Eagle (see article 7272) | |
| Wade Allied Group | England | |||
| Wade Ceramics | ??-late 1990's | England | Allied Insulators was purchased with Wade Ceramics to form Wade Allied Group. | |
| Wade, Jeptha H. | 1850's-1870's | Jeptha H. Wade was born in Seneca County, NY in 1811. He was active in telegraph construction by 1847 and in 1855 organized the Western Union Telegraph Co. He designed the insulator comprised of an inverted glass cup covered with a wood shell to protect the glass. | ||
| Wade (George) & Son Ltd | Manchester, England | marking - owl | ||
| Wade Potteries | ||||
| Walker, Henry L. Co. | ||||
| Warden & Co. | 1870's | Westminster, England | Made brown stoneware and iron clad insulators. | |
| Washington Porcelain Co. | Washington, NJ | Listed in the 1927 McGraw-Hill Electrical Trade catalog. | ||
| Weber Electric Co. | WEBER | Schenectady, NY | See patent 917,207 for the Weber nail knob, which were sold by Henry D. Sears in Boston, MA. Since August Weber was from Schenectady, NY, he may have had the knobs made by GE in same city. The 1921 EMF Electrical Year Book said they manufactured porcelain sockets. The exclusive distributor was Henry D. Sears. | |
| West Virginia Porcelain Co. | 1919-1925 | New Haven, WV | Dr. J. T. Ferrell organized the company in 1919 and sold it to New Haven Porcelain Co. in 1925. The company was listed in the 1922 Journal of the American Ceramic Society under the direction of Dr. Ferrell. The company operated on a capital of $50,000 and employed forty people manufacturing large quantities of electrical porcelain, a product that was shipped all over the United States and Canada. | |
| Western Electric Co. | 1890's-1920's | Chicago, IL | Electrical supplies, standard porcelain, cleats, rubber ramshorn, Brookfield, Thomas, Electrose | |
| Western Electric Mfg. Co. | 1870-1880's | Chicago, IL | Electrical supplies, Brooks, Ponds, Kenosha, La Bastie, CD 131, battery insulator | |
| Western Flint Glass Co. | W.F.G.CO. | 1899-1900 | Denver, CO | When R. Good, Jr.'s Valverde Glass Works was destroyed by a fire on June 27, 1899, it was rebuilt as the Western Flint Glass Co. by a group of young entrepreneurs who were sons of wealthy Denver businessmen. [see Colorado Glass Works] |
| Western Glass Mfg. Co. | W.G.M.CO. | 1900-1909 | Denver, CO | After one year of operation, the Western Flint Glass Co. was reorganized as the Western Glass Mfg. Co. in November 1900. |
| Western States Porcelain Co. | 1912-? | Richmond, CA | The company was founded by Herbert F. Brown. He came to California in 1899 starting a hardware business in Los Angeles and San Francisco and moved to Richmond in 1907. An article in the August 11, 1912 Oakland Tribune gave them name as Western Porcelain Co. and said their plant in Richmond, CA was just finished and will start production to fill an order from Standard Oil refinery in Richmond. An article in the April 30, 1913 Oakland Tribune stated: "Western States Porcelain Ware Factory -- Toilets, washstands, urinals and other sanitary good and high voltage insulators and other electrical articles. Erecting buildings for manufacture of solid porcelain bathtubs and porcelain tableware." [ID 7246] | |
| Westfalia-Surge, Inc. | 1999-present | Napervile, IL | The German company Westfalia Landtechnik GmbH purchased Babson Bros. Co. creating Westfala-Surge, Inc. | |
| Westinghouse Electric & Mfg. Co. | CUTTER | 1920's | East Pittsburg, PA | arc light equipment |
| Westinghouse Electric Corp. | 1922-1953 | Derry, PA | ||
| Westinghouse Electric Corp. | 1923-1944 | Emeryville, CA | ||
| Westinghouse High Voltage Insulator Co. | 1922-?? | Derry, PA | Took over the Pittsburg High Voltage Insulator Co. in 1922. | |
| Wetmore-Savage Co. | early 1900-? | Boston, MA | Electrical supplies | |
| Wheeling Tile Co. | 1920's | Wheeling, WV | Listed in the 1921 EMF Electrical Year Book as a manufacturer of porcelain cleats, tubes, etc. | |
| Whitall Tatum Co. | 1854-1939 | Millville, NJ | Original name was Whitall, Tatum & Co. started in 1854 by Israel and John Whitall and Edward Tatum in Millville, NJ. In 1899, the company was owned by Charles A. Tatum and John Whitall to make bottles in "New York and Philadelphia" (probably office locations). In 1899 they formed a trust with William Brookfield known as the National Glass Co. Several other glass bottle makers were part of the trust [see article 8633]. The Whitall Tatum Co. started making insulators in 1922 at their Millville, NJ plant. The company was purchased in 1939 by the Armstrong Cork Co. | |
| Wilkinson (A. J.) & Co. | Boston, MA | Electrical supplies | ||
| Wisconsin Porcelain Co. | ||||
| Wood, M. M. | EUREKA | Chicago, IL | Cleat patented by M. M. Wood (see patent 545,620) | |
| Woodhouse & Rawson | 1880's | England | 11 Queen Victoria St.; manufactured the Woodhouse & Rawson patents split insulator | |
| Wormser Glass Co. | 1875-c. 1927 | Pittsburg, PA | Produced glass insulators. In the 1860's, there was a glass company named E. Wormser & Co. In 1916, Joseph Wormser was the manager. | |
| WUXI Huaneng Ceram | 2002-present | Wuxi Jiangsu, China | Joint venture with PPC Insulators | |
| Xi'an XD High Porcelain Insulator Co, Ltd | ??-present | China | ||
| Zsolnay Ceramics | 1871-?? | Pecs, Hungary | ||
| Zundel Industria Columbiana Materiales Electricos | ZICME | 1960-1966 | Bogota, Columbia | |
| Zundel y CIA, Limitada | ZICME | 1955-1966 | Bogota, Columbia |