Insulator Catalogs
All of these catalogs, either as original catalogs or Xerox copies of catalog pages, reside in the IRS (Insulator Research Service) files. Elton Gish maintains the IRS and is always looking for catalogs not on this list. Please contact me (elton @r-infinity.com) if you would like to share or trade copies of your catalogs.
For additional historic information, try these links:
The Insulator Gazette (more than 11,000 newspaper and trade journal articles)
Insulator Patents (more than 3000 utility and design patents)
Fred M. Locke dedicated web site
NIA.org National Insulator Association
Insulators.info web site dedicated to insulator collecting
The column "Original" means I have an original catalog if there is an "O" indicated. There are 235 original catalogs and copies of more than 445 catalogs.
The column "Format" means I have scans of the catalog available either as TIFF files or PDF.
SP is Standard Porcelain styles.
(updated May 10, 2019)
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
| Original | Company Name | Cat. No. | Year | Pages | Format | ||
|---|---|---|---|---|---|---|---|
| A. B. Chance Co. | P-69 | 1970 | 36 | ||||
| A. B. Chance Co. | 1970 | 14 | |||||
| O | A. B. Chance Co. | 1979 | |||||
| A. B. Chance Co. | 1984 | 8 | |||||
| Akron H-P | 1903 | 21 | |||||
| Akron Smoking Pipe Co. (SP, cleats, nail-knobs, strain, tubes, third rail) | 1908 | 51 | |||||
| O | Alpha Electric Co. (Brookfield, tubes, nail knobs, SP, cleats, Louis Fort clamp, Westinghouse, Pittsburg, White strain, pins by Hubbard, Peirce, Line Material) | 22 | c. 1920 | 1455 | |||
| Allgemeine Elektricitats-Gesellschaft (wooden, porcelain) | 1894 | 15 | |||||
| American Automatic Electric Co. (U-188, WT, Armstrong, Hemingray, fireplug, knobs) | 6000 | ?? | |||||
| American Jobbers Supply Co. (Thomas foreign, Illinois Electric) | 1925 | 7 | |||||
| American Lava Co. | 1924 | 16 | |||||
| O | Baltimore Electrical Supply Co. (Lima, Brookfield, Knowles, J-M, tubes, cleats, split knobs, nail-knobs, SP) | c. 1906 | 582 | ||||
| O | Baltimore Electrical Supply Co. | 960 | |||||
| O | Baltimore Electrical Supply Co. (tubes, nail knobs, SP, cleats, strain, Dunton tree, Brookfield, G. P. Co.) | 7 | 1920 | 1088 | |||
| Barnes & Kobert Mfg Co. (pins, brackets) | 1915 | 13 | |||||
| O | Birnbach Radio Co., Inc. | 41 | ~1940 | 26 | |||
| O | Bissell (The F.) Co. (Hemingray, Lima, Locke glass, SP, cleats, P&S, tubes) | 1907 | 970 | ||||
| O | Brookfield (reprint of 1912 catalog) | 1974 | 126 | ||||
| Brunt Tile & Porcelain | 26 | 1921 | 20 | tiff | |||
| Buell (M. A.) (pin, glass pin-type) | 1877 | 1 | |||||
| O | Bunnell (J. H.) & Co. (Brookfield, glass block, ramshorn, Brooks, knobs, cleats, pin) | 8 | 1886 | 168 | |||
| Bunnell (J. H.) & Co. (glass, glass block, ramshorn, Brooks, knobs, pin) | 1888 | 6 | tiff | ||||
| O | Bunnell (J. H.) & Co. (Brookfield, knobs, hook, SP, cleats, glass block, floor tube, Brooks side-pin) | 12 | 1892 | 224 | |||
| O | Bunnell (J. H.) & Co. (Brookfield, knobs, hook, SP, cleats, glass block, floor tube, Brooks side-pin, P&S U-146, U-146A, pig tail) | 13 | 1893 | 224 | |||
| O | Bunnell (J. H.) & Co. (Brookfield, Columbia, knobs, hook, Thomas SP and cleats, floor tube, glass block, P&S U-146, U-146A, feeder cable compositions, trolley guard block insulators, Brooks rams horn) | 14 | 1895 | 224 | |||
| Bunnell (J. H.) & Co. (glass, knob, pin) | 14 | 1895 | 1 | jpg | |||
| O | Bunnell (J. H.) & Co. (Brookfield, Thomas U-143, knobs, hook, SP, P&S, cleats) | 16 | 1897 | 222 | tiff | ||
| O | Bunnell (J. H.) & Co. (Brookfield, knobs, hook, SP, Thomas U-143, cleats) | 18 | 1899 | 224 | tiff | ||
| O | Bunnell Telegraphic & Electrical Co. (Brookfield, SP) | 11 | 1903 | 62 | |||
| O | Bunnell (J. H.) & Co. (Brookfield, SP, cleats, G. E. knobs, P&S tubes, Holmes tree, glass block, floor tube) | 25 | 1905-06 | 368 | |||
| Bunnell (J. H.) & Co. (Brookfield, Thomas, SP, nail-knob, cleats, tubes) | 1918 | 12 | tiff | ||||
| Bunnell (J. H.) & Co. (Brookfield, nail-knobs, Electrose, tube, antenna strain) | 1924 | 8 | tiff | ||||
| Bunnell (J. H.) & Co. (Brookfield) | 1928 | 1 | tiff | ||||
| O | Buyers' Reference (Peru U-928B, Brunt, F. Locke) | 1899 | 101 | ||||
| O | C. S. Mersick & Co. (SP, Brookfield, nail-knobs, tubes, cleats, White strains) | 16E | 1916 | 711 | |||
| O | C. S. Mersick & Co. (nail knobs, tubes, SP, cleats, White strains, Hemingray) | 24E | 1924 | 391 | |||
| Canadian General Electric (Hemingray, Hemingray No. 41, Pittsburg) | 15 | 1915-16 | 1136 | ||||
| Canadian General Electric (Hemingray, Locke, Pittsburg) | 3 | 1920-21 | 20 | ||||
| Canadian Porcelain Co. (similar to Locke catalog) | 400 | 1916 | 58 | ||||
| O | Canadian Porcelain Co. LTD. (pin-types, all kinds) | 401 | ??? | 118 | |||
| O | Canadian Porcelain Co. LTD. (pin-types, all kinds) | 402 | ??? | 143 | |||
| O | Canadian Porcelain Co. LTD. (pin-types, all kinds) | 407 | 1932 | 256 | |||
| O | Canadian Porcelain Co. LTD. (pin-types, all kinds) | 440 | 1940 | 195 | |||
| Canadian Porcelain Co. | 462 | c. 1960 | 4 | ||||
| O | Cataract Electric Supply Co. (Brookfield, Knowles, Johns-Manville, SP, cleats, tubes, P&S, trolley) | c. 1910 | 395 | ||||
| Central Electric Co. (SP, Victor split, rams horn, block, Brooks, Tillotson (Brookfield) glass, floor, lightning rod, LRI) | 2 | c. 1890 | 20 | ||||
| O | Central Electric Co. (Liquid, Bain, Brookfield, glass knobs, P&S, U-141, U-146, SP, Conover, Victor, break, wood cleats, cleats) | 4 | 1893 | 525 | tiff | ||
| Central Electric Co. (SP, floor and wall tubes, split knob, forestry, cleats) | 7503 | 1894 | 8 | ||||
| O | Central Electric Co. (Hemingray, Columbia, glass knobs, floor, wall tubes, rams horn, Locke glass, SP by Thomas, P&S, wood cleats) | 1899 | 537 | ||||
| Central Electric Co. (Brookfield, Hemingray, Locke glass/porcelain, GE knobs, Benbow mine, rams horn, P&S, floor, tubes, cleats, Peru, SP, Bain break) | 1902 | 28 | |||||
| O | Central Electric Co. (Brookfield, Knowles, Bain, Columbian, Imperial, SP, P&S, J-M, nail-knobs, cleats, tubes, floor) | 24 | 1906 | 805 | |||
| O | Central Electric Co. (SP, knobs, fireplug, GE and Duggan cleats, rams horn, floor tube, tubes, P&S, mine, Brookfield, Knowles, New Lexington) | 26 | 1909 | 1014 | |||
| O | Central Electric Co. (SP, tubes, Paragon, fireplug, nail-knobs, cleats, tubes, rams horn, floor, Cutter, Benbow mine, Hemingray, Pittsburg) | 28 | 1912 | 1112 | |||
| Central Electric Co. (SP, nail-knob, Paragon, fireplug, cleats, tubes, Cutter, Benbow mine, Hemingray, Brookfield, Macomb, Pittsburg) | 39 | 1917 | 25 | ||||
| O | Central Electric Co. (SP, nail-knob, cleats, tubes, mine, Cutter, fireplug, Hemingray, Brookfield, Macomb, Illinois, Pittsburg, suspension, P&S) | 39 | c. 1919 | 1405 | |||
| Central Electric Co. (Hemingray, Pinco, Peirce, SP) | 40 | 1924 | 10 | ||||
| Chester, Charles T. (threadless glass, threaded, "Haley" Cryolite insulator, rubber, Brooks rams horn) | 1873 | 3 | tiff | ||||
| Circle F Mfg. Co. | 9 | 1920's | 84 | ||||
| Cleveland Electrical Supply Co. (Hemingray, knobs, wood cleats, tubes) | 1905-06 | ||||||
| Columbian Electrical Co. (SP, nail-knobs, cleats, Brookfield, Locke glass) | 11 | 1909 | 4 | ||||
| Continental Rubber Works | 4 | ||||||
| Cook Electric Co. (lightning arrester) | 1923 | 6 | |||||
| Cook Porcelain Insulator Co. | 1926 | 3 | |||||
| O | Cook Porcelain Insulator Co. | 1929 | 37 | pdf/tiff | |||
| Cooke-Wilson Electric Supply Co. (mine, porcelain knobs and spools, strain, hanger for Hemingray No. 71 -- CD 281) | 4 | 1922-23 | 6 | ||||
| O | Corning Glass Works ("Pyrex Radio Insulators") | 1928 | 11 | ||||
| Corning Glass Works (radio insulators) | 1929 | 19 | |||||
| O | Corning Glass Works (Suspension & strain ins.) | 1930 | 16 | ||||
| Corning Glass Works (pin types) | 1931 | 27 | |||||
| O | Corning Glass Works ("Pyrex Radio Insulators") | 1934 | 11 | ||||
| O | Corning Glass Works (Pin type & suspension ins.) | 1938 | 48 | ||||
| Corning Glass Works (radio ins) -- 1994 Houston Nat. (mixture of pages) | |||||||
| Crescent City Electric Co. (Hemingray, G.P. Co.) | G | c. 1925 | 3 | ||||
| Cutter (George) Co. (arc lamp hangers, etc.) | July 1900 | 16 | |||||
| Cutter (George) Co. (arc lamp hangers, etc.) | 64 | ||||||
| Davidson & Stevenson Porcelain Co. (SP, pin-types) | 1918 | 17 | tiff | ||||
| Davidson Porcelain Co. (pin-types) | 1920's | 15 | tiff | ||||
| O | Dearborn Electric Co. (fuseholder, SP, cleat, tube) | 1902 | 16 | ||||
| Dexmar Minnesota Inc. (polycarbamate polymer) | 1990 | 4 | |||||
| O | Doubleday-Hill Electric Co. (cutouts, Brookfield, Hemingray, Liquid Insulator, Locke glass, Locke porcelain, M-2795, glass block, glass spools, Murdock, U-928B, SP, cleats, tubes, wood cleats, Holmes tree, ramshorn, knobs, floor tubes) | 4 | 1904 | 1068 | |||
| Dunham, Carrigan & Hayden | 20 | 1903 | 3 | tiff | |||
| E. S. Greeley & Co. (SP, Victor split, Brown pony, rams horn, block, Brookfield, wooden cleats, pins, lightning rod, LRI, Brooks) | 1889 | 38 | |||||
| E. S. Greeley & Co. (SP, Victor split, Brown pony, rams horn, block, Brookfield, wooden cleats, pins, lightning rod, LRI, Brooks, battery jars) | 23 | 1893 | 60 | ||||
| Edison General Electric Co. (wood cleat, rubber tube, hook, knob, glass pin-type) | 11 | 1890 | 1 | ||||
| Edwin C. Lewis, Inc, (Thomas) | ?? | 11 | jpg | ||||
| O | Electric Appliance Co. (Hemingray, floor, SP, cleat, Bain break, Victor split, tubes) | 12 | 1897 | 567 | tiff | ||
| Electric Appliance Co. (Hemingray, Fletcher) | 1898 | 86 | |||||
| Electric Appliance Co. (Hemingray, Locke, Brunt tubes, cleats, and SP) | 16 | 1902 | 23 | tiff | |||
| O | Electric Appliance Co. (Hemingray, Fred Locke glass and porcelain, Brunt tubes, cleats, and SP, GE knobs and cleats, Victor tree) | 20 | 1903-1904 | 743 | |||
| Electric Appliance Co. (O-B, Hemingray, SP) - 1909-1910 | 30 | 1909 | 28 | ||||
| O | Electric Appliance Co. (pins, brackets, O-B mine, Hemingray, O-B, White strain, tubes, P&S, nail-knob, fireplug, Paragon, S-H Co., SP, cleats, fuse cut-outs) | 38 | 1913 | 1136 | |||
| O | Electric Appliance Co. (Hemingray, floor, O-B, White strain, mine, tubes, SP, nail-knobs, cleats) | 44 | 1916 | 1216 | |||
| Electric Appliance Co. (Hemingray, O-B, SP, nail-knob, cleat) | 60 | 1924 | 4 | ||||
| Electric Appliance Co. (O-B, White strain, tubes, nail-knob, SP, cleats) | 60 | 1924 | 5 | ||||
| O | Electric Appliance Co. (pins, Peirce brackets, wireholders, Hemingray, Ohio Brass, White strain, tubes, nail-knobs, SP, cleats) | 60 | 1924 | 472 | |||
| O | Electric Appliance Co. (SP, Odd, Hemingray, O-B, Brunt, P&S) | 30 | 1909-1910 | 974 | |||
| Electric Service Supplies Co. (M&E Co. glass pin-type, glass mine and duplex Brown pony) | 1909 | 5 | tiff | ||||
| O | Electric Service Supplies Co. [Electric Material for Mine and Industrial Haulage] (wire feeder, mine, knobs, cleats, tubes, M&E glass pintypes, pins, brackets, Paiste cutouts, third rail, GE cut-out) | 4, vol. III | 1909 | 598 | |||
| O | Electric Service Supplies Co. [Electric Railway Overhead Line and Track Supplies] (Keystone wire feeder, Locke porcelain, Victor suspension, Victor multiparts, mine, knobs, cleats, tubes, M&E glass pintypes, pins, brackets, Paiste cutouts, third rail, GE cut-out) | 4, vol. I | 1911 | 698 | |||
| Electric Service Supplies Co. (Locke) | 1923 | 26 | |||||
| Electric Service Supplies Co. (Franklin Porcelain Co. -- Bulletin No. 223) | 1928 | 40 | |||||
| O | Electric Service Supplies Co. [Electrical Material for Railroad, Mining, Power and Other Industrial Companies] (Franklin Porcelain, Keystone third rail, OB third rail, Thomas huge white insulators, crane conductor hangers, guy strain, composition, mine, lightning arresters, choke coils) | 10 | 1929 | 919 | |||
| Electric Storage Battery Co. | 1908 | 1 | |||||
| Electric Storage Battery Co. | 1910 | 4 | |||||
| Electric Storage Battery Co. | 1911 | 2 | |||||
| Electric Storage Battery Co. | 1918 | 2 | |||||
| Electrical Supply Co. (odd cylindrical 2-part glass knob) | 1886 | 1 | tiff | ||||
| Electrical Supply Co. (Fluid, glass pin-types, Bain break, floor, Fletcher wireholder, glass knob, SP, battery, cleat) | 23 | 1892 | 19 | tiff | |||
| O | Electric Supply & Equipment Co. (mine, strains, SP, cleats, nail knobs, tubes, Triangle M, SP, Hemingray, New Lexington styles by General Porcelain Co, Fletcher wireholders) | 10 | c. 1915 | 776 | |||
| Electrose (bushings -- non-pin-types) | c. 1915 | 84 | |||||
| O | Elliott-Lewis Electrical Co. (Brookfield, Locke porcelain?, tubes, SP, cleats, pins, Louis Fort clamps) | 8 | 1917 | 858 | |||
| Elliot-Lewis Electrical Co., Inc. (Findlay nail-knobs, GP Co SP and pin-types, tubes, Hemingray) | 10 | 1921 | 11 | pdf/tiff | |||
| O | EMF Electrical Year Book | 1 | 1921 | 1406 | |||
| O | EMF Electrical Year Book | 5 | 1926 | 1340 | |||
| O | Federal Porcelain Co. | 1919 | 23 | ||||
| Federal Porcelain Co. (nail-knobs, cleats, tubes, strain) | 1 | ||||||
| O | Fletcher Mfg. Co. (pins, brackets, wireholders, lamps) | 568 | 1922 | 82 | |||
| Florida Wire & Cable | UP-90 | 1990 | 9 | ||||
| O | Fobes Supply Co. (tubes, cleats, nail knobs, SP, Westinghouse, Hemingray) | 21 | 1924 | 622 | |||
| Frank C. Teal Co. (SP, cleats, S. H. Co., Pittsburg) | 18 | 1918 | 5 | ||||
| Frank Ridlon Co. (floor, GE knobs and cleats) | 1901 | 2 | |||||
| O | Frank Ridlon Co. (Brodie tree, Hemingray, feeder wire, mica, Locke pin, floor tube, wood cleat, GE cleats and knobs, wall tubes, SP) | 1902 | 433 | ||||
| Frank Ridlon Co. (pole tops, metal crossarms, trolley, composition, Brookfield?, Brodie tree, pins, strain) | 1904 | 61 | |||||
| Gaskell & Grocott (British pin type, SP, cleats, tubes) | 1909 | 33 | |||||
| Gaskell & Grocott (British pin type, cleats) | 1912 | 7 | |||||
| Gate City Electric Co. (Bain CD 144, Bain break strain, SP, Victor split, Brodie, floor, hook, wood) | 1891 | 303 | |||||
| General Electric Co. (Brookfield) | 7503 | 1894 | 27 | ||||
| General Electric. Co. [Railway Apparatus] (composition feeder, cleats, knobs, floor and wall bushings, third rail support) | 7510 | 1896 | 7 | pdf/tiff | |||
| Canadian General Electric Co. (Hemingray, wall and floor bushings, nail-knobs, cleats, Imperial, tubes, tree, pins and brackets) | 1 | 1896 | 25 | pdf/tiff | |||
| General Electric Co. (cleat, knob, SP, P&S tubes, hook, Brookfield) | 7514 | 1897 | 13 | pdf/tiff | |||
| General Electric Co. (GE knob, cleats, SP) | 7514 | 1897 | 12 | ||||
| General Electric Co. (Star, SP) | 1904 | 2 | |||||
| General Electric Co. (Star, SP, fuse cutout) | 1904 | 25 | |||||
| O | General Electric (floor, tree, wall tubes, SP, Star, 3 porcelain) | 7603 | 1907 | 430 | |||
| O | General Electric | 1909 | 380 | ||||
| General Electric Co. (nail-knobs, cleats, Star, Locke, tubes) | 4645 | 1909 | 5 | ||||
| General Electric Co. (Star, SP, unipart) | 1909 | 4 | |||||
| General Electric Co. (feeder types, Thomas, Locke, glass, M-2202 GE Breakaway) | 4725 | 1910 | 444 | pdf/tiff | |||
| O | General Electric (Locke glass, Brookfield, Locke, nail-knob, cleat) | 4824 | 1911 | 400 | pdf/tiff | ||
| General Electric Co. (cleats, wood strain, guy strain, disk strain, Brookfield) | A4180 | 1913 | 13 | pdf/tiff | |||
| General Electric Co. (strain) | GE17 | 1917 | 1 | ||||
| General Electric Co. (Brookfield) | GE18 | 1918 | 2 | ||||
| Canadian General Electric Co. (tubes, SP, tree, cleats, White guy strain, Hemingray, Locke Victor) | 20 | 1920-21 | 15 | pdf/tiff | |||
| General Electric Co. (Locke) | 1935 | 5 | |||||
| O | General Electric (Power & Pole Line Equipment) | 1938 | 239 | ||||
| General Electric Co. (Hemingray, Locke, strains, odd) | 1951 | 11 | |||||
| General Electric Co. (Locke) | 61 | 1961 | 12 | ||||
| General Porcelain Co. | 1 | 1923 | 5 | tiff | |||
| O | George H. Buckminster Co. (tubes, nail knobs, cleats, Louis Fort brackets, Fletcher wireholders, Holmes tree, Pierce tree (U-187), Hemingray, General Porcelain Co.) | 5 | 1924 | 288 | |||
| O | George Worthington Co. (Thomas SP, Hemingray, tubes, cleats, Victor forestry, floor tube, Peru cutouts, pins, Cutter) | 1902 | 149 | tiff | |||
| Gleason (E. P.) Mfg. Co. (SP, pigtail hook) | E | 1888 | 37 | ||||
| Gleason (E. P.) Mfg. Co. (SP, tube) | 1902 | 159 | |||||
| O | Graybar Electric Co. (Hemingray, Whitall Tatum, Thomas strain, Thomas) | 100 | 1929 | 1085 | |||
| O | Graybar Electric Co. (Hemingray, Whitall Tatum, Thomas strain, Thomas) | 101 | 1934 | 735 | |||
| O | Graybar Estimator (Peirce, Hemingray, OB) | 76 | 1940's | 336 | |||
| Graybar Electric Co. (Hemingray, Thomas, W-T (Armstrong) | 10-S | 1940 | 5 | ||||
| O | Graybar Electric Co. (Hemingray, Lowex, Armstrong, Thomas) | 102 | 1941 | 1072 | |||
| O | Graybar (cleats, knobs, nail knob, tube, Peirce, wireholders, Owens-Illinois, Hemingray, OB, Porc. Prod., Hubbard, Armstrong) | 103 | 1948 | 1116 | |||
| O | Graybar (Hemingray, OB, Porc. Prod., Hubbard, Armstrong, rubber) | 104 | 1952 | 1352 | |||
| O | Graybar (Hemingray, OB, Porc. Prod., Hubbard, Peirce, Armstrong, rubber) | 105 | 1958 | 1628 | |||
| O | Graybar (Case transposition bracket, OB, Hemingray) | 106 | 1967 | 1116 | |||
| O | Great Western Electric Supply Co. (Brookfield?, Bain, floor tubes, UPW SP, cleats, wood cleats, glass knobs | 1891 | 320 | ||||
| H.K. Porter (Delta Star) (suspension, pin-types, manufacturers cross-reference) | 1959 | 19 | |||||
| O | Hartford Faience Co. | 1925 | 25 | ||||
| Hartford Faience Co. | 1927 | 4 | |||||
| Hartford Faience Co. | 1930 | 13 | |||||
| Havens Electric Co. (Hemingray) | M | 2 | |||||
| Hemingray Glass Co. (missing pages 11-13, 21-29, 45-49, 75, 87, and even pages) | 27 | 1911 | 35 | ||||
| Hemingray Glass Co. | 28 | c. 1913 | 51 | ||||
| Hemingray Glass Co. | 1 | 1921 | 32 | ||||
| Hemingray Glass Co. | 2 | 1922 | 4 | ||||
| Hemingray Glass Co. | 1942 | 18 | |||||
| Hemingray Glass Co. (good history of insulators) | 1946 | 24 | |||||
| Hemingray Glass Co. | 1953 | 8 | |||||
| Hemingray Glass Co. | 1953 | 2 | |||||
| Hemingray Glass Co. (price list only) | 1956 | 1 | |||||
| Hemingray Glass Co. | D-1 | 1931-33 | 14 | ||||
| O | Hendrie & Bolthoff Mfg. And Supply Co. (pins, Peirec racks, tubes, SP, White strains, OB, Brookfield) | 60 | 1920 | 1014 | |||
| O | Hendrie & Bolthoff Mfg. And Supply Co. (Locke, Hewlett, Joslyn, Hemingray, tubes, knobs, cleats) | 140 | 1936 | 592 | |||
| Hendrie & Bolthoff Mfg & Supply (SP, Hemingray, Locke) | 1945 | 17 | |||||
| Hendrix Wire & Cable Corp. (polyethylene styles) | 1981-83 | 4 | |||||
| Henry L. Walker Co. (SP, nail-knobs, cleats, S-H Co. tubes, wood cleats) | B | 1910 | 4 | ||||
| Hermsdorf Porcelain Factory (also see Northern Electric) | 1905 | 117 | |||||
| O | Hubbard & Co. (Manwaring U-189B, Pierce) | 24 | 1924 | 192 | |||
| O | Hubbard & Co. | 28 | 1928 | 192 | |||
| O | Hubbard & Co. | 1965 | 91 | ||||
| Illinois Electric Co. (Hemingray, GP Co: tubes SP, nail knobs, cleats, Westinghouse) | 11 | c. 1898 | 18 | ||||
| O | Illinois Electric Co. (Hemingray pin-types, SP, tubes, pins, brackets, Brunt SP, Peirce brackets) | 15 | 1903 | 172 | |||
| O | Illinois Electric Co. (tubes, Brunt SP, Duggan, P&S, nail-knob, fireplug, Hemingray, Cutter, Thomas, S. H. Co.) | 19 | 1910 | 890 | |||
| O | Illinois Electric Co. (Hemingray, SP, tubes, Westinghouse) | 25 | 1919 | 1142 | |||
| Illinois Electric Co. (tubes, GP Co SP, nail-knob, pins, brackets, Hemingray, Westinghouse) | 26 | 1923 | 36 | pdf/tiff | |||
| O | Illinois Electric Co. (tubes, GP Co SP, nail-knob, pins, brackets, Hemingray, Westinghouse) | 26 | 1923 | 671 | |||
| Illinois Electric Material Co. (glass pin-type, spool tree, knobs) | c. 1890's | 3 | |||||
| Illinois Electric Porcelain Co. | 1918 | 17 | |||||
| O | Illinois Electric Porcelain Co. (pin-types, standard, misc.) | 11 | 1921? | 32 | |||
| Illinois Electric Porcelain Co. | 26 | 1923 | 17 | pdf/tiff | |||
| O | Illinois Electric Porcelain Co. (with price list) | 102 | 1926 | 64 | |||
| Illinois Electric Porcelain Co. (dry process styles only) | 103 | 1927 | |||||
| O | Illinois Electric Porcelain Co. (with price list) | 104 | 1930 | 160 | |||
| O | Illinois Electric Porcelain Co. | 1930's | 78 | ||||
| O | Illinois Electric Porcelain Co. | DL-8 | 1954 | 47 | |||
| Illinois Electric Porcelain Co. | ?? | 1 | |||||
| Inter-Mountain Electric Co. (tubes, SP, cleats, Hemingray, Westinghouse) | L | 1927 | 4 | ||||
| O | Iron City Electric Co. (Pittsburg, Thomas tubes and bushings, Hemingray, pins, Peirce brackets) | 4 | 1917 | 1220 | |||
| Iron City Electric Co. (Hemingray, Parker-Thomas?) | 22 | 1922 | 8 | ||||
| O | Isolanite Inc. (misc.) | Bul. 100-F | 1931 | 59 | |||
| I-T-E | 12.1-1A | 2 | |||||
| I-T-E (marking codes) | 1971 | 20 | |||||
| J. J. Duck Co. (Electrose radio antenna, nail-knob, cleat) | 2 | ||||||
| Jeffery-Dewitt | 4 | 1923 | 56 | ||||
| Jeffery-Dewitt | 5 | ?? | |||||
| O | Jeffery-Dewitt | 10 | 1927 | 8 | |||
| Jeffery-Dewitt | 14 | 1928 | |||||
| O | Jeffery-Dewitt | 14-A | 1929 | 32 | |||
| O | Jeffery-Dewitt (unipart, suspension, and post) | 14A, 15, 16 | 1929 | 108 | |||
| Jeffery-Dewitt | 1934 | 15 | |||||
| O | Jeffery-Dewitt (pin-type and pins) | sections 5-6 | 1934 | 13 | |||
| O | Jeffery-Dewitt (suspension and strain) | section 2 | 1934 | 61 | |||
| O | Jeffery-Dewitt (unipart, suspension, and post) [loose pages] | 1938 | 50 | ||||
| O | Jeffery-Dewitt (unipart, suspension, and post) | 40 | 1940 | 96 | |||
| O | Jeffery-Dewitt (Price List for Bulletin. 200 thru 900) | 5-5-1941 | 30 | ||||
| O | Jeffery-Dewitt -- Suspension and Strain Insulators | 200 | c. 1941 | 34 | |||
| O | Jeffery-Dewitt -- Switch and Bus Insulators | 700 | c. 1941 | 27 | |||
| O | Jeffery-Dewitt (Bulletins 201 suspension & strain, 300 suspension & strain hardware, 500 pin-type & line post, 700 switch & bus) | 1948 | 104 | ||||
| Jeffery-Dewitt | 500 | 1950 | 6 | ||||
| Jeffery-Dewitt | 1952 | 5 | |||||
| Jerome Redding (glass pin-type, knob) | c. 1880's | 2 | |||||
| Johns-Manville | 1894 | 3 | |||||
| O | Johns-Manville (molded mica pin-types, Thomas, glass, reconstructed granite third rail) | 14 | 1905 | 349 | |||
| Johns-Manville (Thomas, glass) | 15 | 1911 | 15 | ||||
| O | Joslyn Mfg. & Supply Co. (Pinco, Illinois, Hemingray) | 10 | 1926 | 224 | |||
| O | Joslyn Mfg. & Supply Co. (Pinco, Hemingray) | 11 | 1934 | 221 | |||
| O | Joslyn Mfg. & Supply Co. (Pinco, Hemingray, Illinois, Triangle M, SP) | 12 | 1939 | 248 | |||
| O | Joslyn Mfg. & Supply Co. (Pinco, Hemingray LOWEX) | 14 | 1941 | 262 | |||
| O | Joslyn Mfg. & Supply Co. (Pinco, Hemingray) | 15 | 1945 | 300 | |||
| O | Joslyn Mfg. & Supply Co. (Pinco, Triangle M specialty, Hemingray) | 16 | 1950 | 340 | |||
| Joslyn Mfg. & Supply Co (Pinco & Hemingray) | 17 | 1954 | 13 | ||||
| Joslyn Mfg. & Supply Co (Pinco) | 1962 | 8 | |||||
| Joslyn Mfg. & Supply Co (Pinco & Hemingray & wireholders) | 10-67 | 1967 | 7 | ||||
| Joslyn Mfg. & Supply Co (Pinco & Hemingray) | 305-70 | 1968-72 | 10 | ||||
| Joslyn Mfg. & Supply Co (Unitary suspension ins.) | 302-69 | 1969 | 6 | ||||
| Joslyn Mfg. & Supply Co (Pinco) | 1970 | 5 | |||||
| Joslyn Mfg. & Supply Co | 1983 | 9 | |||||
| Joslyn Mfg. & Supply Co | 1986 | 7 | |||||
| Julius Andrae & Sons Co. (Westinghouse, strain, Dunton tree, nail-knob) | 48 | 1919 | 15 | ||||
| Julius Andrae & Sons Co. (Electrose radio antenna, nail-knob, cleat) | R-8 | 1925 | 2 | ||||
| Julius Andrae & Sons Co. (Hemingray, Brunt tube and knobs, E.P.Co. knob) | 3 | ||||||
| Kellogg (Hemingray, porcelain) | 8 | 1928 | 1 | ||||
| Kellogg (Hemingray, PP, Rubber) | 1960's | 3 | |||||
| O | Knowles | 20 | 1902 | 49 | |||
| Knowles, C. S. (Imperial, New Lexington, Knowles Prism glass) | 51 | 1907 | 48 | tiff | |||
| Knox | 3 | ?? | |||||
| O | Knox Porcelain Corp. | 3 | 88 | ||||
| Knox Porcelain Corp. (neon signs) | 5 | ?? | 3 | ||||
| Knox Porcelain Corp. | 6 | ?? | 3 | ||||
| O | Knox Porcelain Corp. | 7 | 1938 | 72 | |||
| Knox Porcelain Corp. | 9 | 1948 | 8 | ||||
| Knox Porcelain Corp. | 10 | 1950 | 2 | ||||
| Knox Porcelain Corp. | 10 | 1950 | 3 | ||||
| Knox Porcelain Corp. | 11 | 1953 | 107 | ||||
| O | Knox Porcelain Corp. (several sections in paper covered binder) | 11 | 1953 | ||||
| Knox Porcelain Corp. | 11 | 1959 | 2 | ||||
| Knox Porcelain Corp. | 11 | 1960 | 10 | ||||
| Knox Porcelain Corp. | 11 | 1968 | 24 | ||||
| Knox Porcelain Corp. (pin-type & suspension) | 12 | 1971 | 16 | ||||
| L. G. Tillotson | 1883 | ||||||
| L. G. Tillotson (CD 131 and pin) | 13 | 1 | |||||
| Landgon & Hughes Electric Supply Co. (SP, cleats, White strain, Fort wireholder, Brookfield, glass block) | 1 | 1920 | 9 | ||||
| O | Lapp Insulator Co. | 1 | 1918 | 31 | tiff | ||
| O | Lapp Insulator Co. | 2 | 1920 | 32 | |||
| O | Lapp Insulator Co. | 3 | 1923 | 35 | |||
| Lapp Insulator Co. (paste-up copy of 1920 cat. for printer) | 3 | 1923 | 34 | ||||
| Lapp Insulator Co. (plus "million lbs. on a teacup") | 3A | 1925 | 35 | ||||
| Lapp Insulator Co. (3A second edition) | 3A | 1926 | 35 | ||||
| Lapp file drawings of insulators (with 1931/1934 catalog book) | 1927-35 | 7 | |||||
| O | Lapp Insulator Co. | 4 | 1928 | 96 | |||
| O | Lapp Insulator Co. | 5 | 1931 | 141 | |||
| Lapp Insulator Co. (radio insulators) | 110 | 1934 | 25 | ||||
| O | Lapp Insulator Co. | 6 | 1939 | 127 | |||
| O | Lapp Insulator Co. | 7 | 1948 | 125 | |||
| O | Lapp Insulator Co. | 8 | 1959 | 167 | |||
| O | Lapp Insulator Co. (suspension ins.) | 9-B | 1970 | 49 | |||
| Lapp Insulator Co. | 10G | 1986 | 36 | ||||
| Latham (E. B.) & Co. (SP, tubes, Brookfield) | 34 | 1912 | 14 | pdf/tiff | |||
| Leonard and McCoy (Brookfield, SP, P&S, Fletcher, cleats, Duggan, IXL) | 1900 | 90 | |||||
| O | Lima Insulator Co. | 1 | 1904 | 32 | |||
| Line Material Co. (wireholder, rack spool, strain, Hendee tree) | 1927 | 15 | |||||
| Line Material Co. (loop ins. & feeder cable ins.) | 1928 | 1 | |||||
| O | Line Material Co. | 1938 | |||||
| Line Material Co. (L-M, Hemingray, wireholders) | 1958 | 14 | |||||
| Locke Ins. Mfg. Co. | 3 | 1895 | 9 | tiff | |||
| Locke Ins. Mfg. Co. | 3 | 1897 | 15 | tiff | |||
| Locke Ins. Mfg. Co. | 4 | 1899 | 14 | tiff | |||
| O | Locke Ins. Mfg. Co. | 5 | 1900 | ||||
| O | Locke Ins. Mfg. Co. | 6 | 1902 | ||||
| O | Locke Ins. Mfg. Co. | 8 | 1904 | 56 | tiff | ||
| Locke Ins. Mfg. Co. (Supp. No. 1) | 8 | 1905 | 2 | ||||
| Locke Ins. Mfg. Co. | 9 | 1906 | 2 | ||||
| O | Locke Ins. Mfg. Co. | 9 | 1907 | 59 | |||
| O | Locke Ins. Mfg. Co. | 1910 | 90 | tiff | |||
| O | Locke Ins. Mfg. Co. | 1912 | 20 | tiff | |||
| Locke Ins. Mfg. Co. | 1913 | 200+ | |||||
| O | Locke Ins. Mfg. Co. | 1916 | 184 | ||||
| Locke Ins. Mfg. Co. | 1919 | 136 | |||||
| O | Locke Ins. Corp. (pin type ins.) -- Bulletin #4 | 25 | 1923 | 19 | |||
| O | Locke Ins. Corp. (suspension & hardware) -- Bulletin #2 | 25 | 1923 | 54 | |||
| O | Locke Ins. Corp. | 25 | 1925 | 253 | |||
| O | Locke Ins. Corp. | 27 | 1927 | 309 | |||
| O | Locke Ins. Corp. (added drawings, notes, Locke Sign ) | 27 | 1927 | 309 | |||
| Locke Ins. Mfg. Co. | 27 | 1927 | 52 | ||||
| O | Locke Ins. Corp. ("The Locke Sign" -- multiparts only) | c. 1929 | 16 | ||||
| O | Locke Ins. Corp. ("The Locke Sign" -- suspensions only) | c. 1930 | 20 | ||||
| O | Locke Ins. Corp. | 32 | 1932 | 320 | |||
| O | Locke Ins. Corp. (lots of added drawings, RFI article) | 32 | 1932 | 320 | |||
| O | Locke Ins. Corp. -- "Locke Hi-Top One-Piece Insulator" | 1933 | 4 | ||||
| O | Locke Ins. Corp. "Switch & Bus Insulators" | 1934 | 27 | ||||
| O | Locke Ins. Corp. (Seyler hardware) | 36 | 1936 | 224 | |||
| O | Locke Ins. Corp. (loose leaf hard cover) | 1939-1943 | |||||
| O | Locke Ins. Corp. (loose leaf hard cover) [few additional pages] | 1939-1943 | |||||
| Locke (G-E) (Hemingray - Manufacturer cross-reference) | 1945 | 20 | |||||
| O | Locke Ins. Corp. (Radio Insulators) | c. 1945 | 28 | ||||
| O | Locke Incorporated -- RM Handylog (pin-types, suspension, etc.) | 1949 | 99 | ||||
| O | Locke Ins. Mfg. Co. | 55 | 1955 | 233 | |||
| Locke - NGK (cap & pin ins.) | 871 | ?? | 12 | ||||
| Locke - NGK (suspension ins.) | 861 | ?? | 18 | ||||
| O | Locke Ins. Corp. (Modern Radio Broadcasting Insulators) | ??? | 22 | ||||
| O | Manhattan Electrical Supply Co. (Brookfield, SP, cleats, rubber tube, rubber ramshorn, Victor split tree) | 6 | 1896 | 104 | |||
| Manhattan Electrical Supply Co. (rubber, hook, cleat, tubes, SP, GE knob, Victor split, floor, Brookfield?, Brown pony) | 10 | 1898 | 337 | ||||
| Manhattan Electrical Supply Co. (floor, tubes, cleats, Victor split, Brookfield, Brown's pony) | 11 | 1899 | 5 | ||||
| O | Manhattan Electrical Supply Co. (feeder wire, Brookfield, Pittsburg, SP, cleats, nail knobs, tubes) | 13 | 896 | ||||
| Manhattan Electrical Supply Co. (Brookfield, Imp, SP, cleat, wooden) | 18 | 1902 | 67 | bmp | |||
| Manhattan Electrical Supply Co. (Brookfield, Imperial, SP, cleat, tubes, wooden) | 1904 | 16 | |||||
| Manhattan Electrical Supply Co. (Brookfield, Locke, Imperial, SP, cleat, tubes, wooden) | 21 | 1905 | 736 | ||||
| O | Manhattan Electrical Supply Co. (Brookfield, SP, cleats, tubes, duplex pins) | 16 | 1910 | 80 | |||
| Manhattan Electrical Supply Co. (Imp, SP, cleat) | 25 | 1912 | |||||
| O | Manhattan Electrical Supply Co. (Brookfield, Locke glass, Pittsburg, SP, cleats, tubes, nail knobs) | 27 | 1914 | 918 | tiff | ||
| O | Manhattan Electrical Supply Co. (Brookfield, Locke glass, Pittsburg, SP, cleats, tubes, nail knobs, rubber ramshorn, duplex pins, J-M trolley) | 30 | c. 1922 | 896 | |||
| Mayer & Englund (glass, Imperial, New Lexington) | 1905 | 21 | jpg | ||||
| Mayer & Englund (glass, Imperial, New Lexington) | 1905 | 11 | pdf/tiff | ||||
| McCarthy Bros. & Ford (SP, Hemingray, West.) | 1920 | 10 | |||||
| McGraw Co. (Pittsburg, Westinghouse, Hemingray) | 15 | 1916 | 8 | ||||
| O | McGraw-Hill Electrical Trade Catalog (dozens of companies) | 1927-28 | 370 | ||||
| McGraw-Edison | 1968-70 | 4 | |||||
| O | Metropolitan Electrical Supply Co. | c. 1890's | 32 | ||||
| Metropolitan Electric Co. (Hemingray, Stuart insulator, Thomas SP, Conover knob and cleat, P&S, Hammond knob and cleat, Nashold cleat, Eureka cleat, Duggan cleat, wood cleats, rams horn, split knob, porcelain tubes, rubber tubes, glass floor tube, corner insulator, Eichberg tree insulator) | 3 | 1895 | 755 | pdf/tiff | |||
| O | Mid-West Electric Co. (SP, Hemingray, Thomas?, Cutter) | 18 | 1918 | 736 | |||
| O | Mine & Smelter Supply Co. (Locke pin-types, strains, Hemingray, tubes, nail-knobs, cleats, mine, SP, and Locke pins) | 26 | 1913 | 672 | |||
| Mine and Smelter Supply Co. (SP, Fireplugs, Westinghouse, Hemingray, strain) | 56 | 1919 | 16 | ||||
| O | Mohawk Electrical Supply Co. (tubes, Paragon knob, nail-knobs, cleats, SP, White strain, Holmes tree, Brookfield, Locke Victor) | 7 | 1916 | 1119 | |||
| Montana Electric Co. (Thomas, SP, P&S) | 1912 | ||||||
| Morley Brothers Electrical Supplies (Hemingray) | 1 | 1920 | 5 | ||||
| O | W. G. Nagel Electric Co. (Imperial, Knowles, Hemingray, Feeder, Brookfield, Jumbo, Columbia, Fred Locke pony, Peru SP, cleats, B&D, self-tying, STANDARD tubes, floor, P&S, Murdock) | 1 | 1904 | 904 | |||
| O | W. G. Nagel Electric Co. (Hemingray, New Lexington Crown, nail-knob, tubes, SP, cleats) | 8 | c. 1912 | 560 | |||
| National Electrical Supply Co. (Brookfield, Hemingray, Prism, Imperial, Lima, Locke) | 1907 | 11 | |||||
| National Electrical Supply Co. (Thomas) | 16 | 1914 | 3 | ||||
| O | National Metal Molding Co. (National wireholders, racks, brackets) | 603 | 1922 | 12 | |||
| O | National Metal Molding Co. (National wireholders, racks, brackets) | 18-007 | 1927 | 24 | |||
| National Porcelain Co. | 1962 | 10 | |||||
| New Haven Clock Co. (wooden cleat, rams horn, UPW SP, pony pin-type) | 1889-1890 | 3 | |||||
| New Haven Porcelain Co. (superior porcelain) | 1972 | 17 | |||||
| New Lexington | 1908 | ||||||
| O | Newark Electrical Supply Co. (tubes, SP, nail-knobs, Brookfield, General Porcelain Co.) | 19 | 1919 | 728 | pdf/tiff | ||
| Newell Porcelain Co., Inc. | 1990 | 14 | |||||
| NGK Insulators, LTD | 15C | ?? | 18 | ||||
| NGK Insulators, LTD | 15 | 1971 | 14 | ||||
| Northern Electric Co. (Hemingray, Dominion, Hermsdorf, Thomas) | 1915 | 5 | tiff | ||||
| O | Northern Electric Co. (Brookfield (green illustrations), Thomas, suspension, Holmes tree, Electrose, SP, cleats, wall tubes, pins, Electrose, Fletcher wireholders, nail knobs, strains, mine) | 3 | 1917 | 1461 | |||
| Northern Electric Co. (SP, cleats, tubes, nail-knobs, Hemingray, Dominion, Thomas, Electrose strain, Canadian Porcelain, strain, Hewlett) | 7 | 1945 | 959 | ||||
| Northwestern Electric Equipment Co. (Westinghouse, Hemingray No. 41 [CD 224.5]) | 1915 | 9 | |||||
| Northwestern Electric Equipment Co. (tubes, nail-knobs, fireplug, Paragon, S. H. Co., White strain, SP, Brookfield, Thomas, Holmes tree) | 1914-15 | 26 | |||||
| O | Northwestern Electric Equip. Co. (SP, fireplugs, tubes, cleats, Hemingray, Westinghouse, White strain, Holmes tree, nail knobs) | 16 | 1915-16 | 1304 | |||
| O | NW General Electric Supply Co. (Hemingray, Locke, Macomb, SP) | 29 | 1928 | 370 | |||
| Novelty Electric Co. (ramshorn, knob, cleat, CD131, CD102) | 1885 | 4 | |||||
| Ohio Brass (Electric Railway Supplies) -- Hemingray | 4 | 1899 | 245 | ||||
| Ohio Brass (Bain break strain, glass knobs, SP, Holmes tree, Victor tree, Hemingray, Locke, mine, Locke glass, Hemingray, pins, Locke gutter dead-end) | 6 | 1903 | 66 | pdf/tiff | |||
| Ohio Brass (Elect. Rwy, Lt & Pwr) -- Hemingray | 6 | 1903 | 7 | ||||
| Ohio Brass (Elec Rwy & Mine Supplies) - (Hemingray) | 7 | 1907 | 553 | ||||
| Ohio Brass - October | 1 | 1907 | 64 | ||||
| Ohio Brass (Elect Railway) - Oct. (odd strain) (supplement to #7) | 7 | 1908 | 4 | ||||
| Ohio Brass (H-T Porcelain Insulators) - Jan. | 2 | 1909 | 102 | ||||
| O | Ohio Brass Co. (April - Elec., Rail & Mine) - (Hemingray) | 8 | 1910 | 297 | |||
| Ohio Brass (Elec Rrwys, Mine, Trans.) - June (porcelain & Hemingray) | 9 | 1910 | 218 | ||||
| Ohio Brass (H-T Porcelain Insulators) - July | 10 | 1910 | 120 | ||||
| O | Ohio Brass Co. (Elect. Railway and Mine) July 1910) | 10 | 1910 | 120 | |||
| Ohio Brass (Supplement No. 2) - July | 1911 | 91 | |||||
| Ohio Brass | 12 | 1912 | 9 | ||||
| Ohio Brass (Elect Rwy, Mine & Trans) | 12 | 1912 | 2 | ||||
| O | Ohio Brass Co. (Hemingray) | 12 | 1912 | 487 | |||
| Ohio Brass (Elec Rwy Mine Haulage & Trans. Lines) Hemingray | 14 | 1914 | 606 | ||||
| O | Ohio Brass Co. (Hemingray) | 16 | 1916 | 654 | |||
| O | Ohio Brass Co. (Hemingray) | 17 | 1919 | 671 | |||
| O | Ohio Brass Co. (Hemingray) | 18 | 1921 | 638 | |||
| Ohio Brass | 19 | 1925 | 13 | ||||
| O | Ohio Brass Co. (Ins. section) - (Hemingray) | 19 | 1924-25 | 340 | |||
| O | Ohio Brass Co. (Hemingray) | 20 | 1926-27 | 916 | |||
| O | Ohio Brass Co. | 21 | 1934 | 422 | |||
| O | Ohio Brass Co. (Ins. section) | 21 | 1934 | 182 | |||
| O | Ohio Brass Co. (switch & bus ins.) | Bul. 607H | 1934 | 24 | |||
| O | Ohio Brass Co. (all kinds) [small 2-ring notebook] | 1935-1939 | |||||
| O | Ohio Brass (Mining & Industrial) | 22 | 1939 | 160 | |||
| Ohio Brass (control gaps) | 24 | 1940 | 102 | ||||
| O | Ohio Brass Co. | 24 | 1940 | 159 | |||
| O | Ohio Brass Co. | 26 | 1947 | 160 | |||
| O | Ohio Brass Co. (Transit catalog) | 25 | 1948 | 206 | |||
| Ohio Brass (Mining and Industrial) | 27 | 1949 | 6 | ||||
| O | Ohio Brass Co. | 28 | 1953 | 167 | |||
| O | Ohio Brass Co. | 53 | 1967 | 58 | |||
| O | Ohio Brass Co. | 60 | 1970 | 59 | |||
| Ohio Brass | 60A | 1973 | 10 | ||||
| O | Ohio Brass Co. (Hi-Lite plastic rod ins.) | Pub. 2554-H | 1976 | 28 | |||
| Ohio Brass | 1980 | 60 | |||||
| Owens-Illinois Glass Co. (LOWEX) | 1940 | 7 | |||||
| Pacific States Elec. Co. (Locke, SP) | 26 | 1921 | 14 | ||||
| O | Pacific States Electric Co. (Locke, Hemingray) | 26 | 1918-1922 | 472 | |||
| Parker | 1915 | 11 | |||||
| Partrick & Carter (Brooks, La Bastie, CD 136.7, knob) | 1878 | 2 | |||||
| O | Partrick & Carter Co (glass pin-types, knobs, battery) | 1895 | 130 | ||||
| Pass & Seymour | July 1, 1892 | 1 | tiff | ||||
| Pass & Seymour | Nov. 16, 1892 | 31 | |||||
| O | Pass & Seymour | 11 | 1899 | 60 | tiff | ||
| O | Pass & Seymour | 12 | 1900 | 63 | tiff | ||
| O | Pass & Seymour | 1911 | 70 | ||||
| Pass & Seymour (cut-out, cleats, strain, tubes) | 21 | 1912 | 3 | ||||
| Pass & Seymour (cut-out) | 22 | 1914 | 1 | ||||
| Pass & Seymour (cut-out, tubes, cleats) | 23 | 1915 | 1 | ||||
| O | Pass & Seymour | 28 | 1927-8 | 36 | |||
| Pass & Seymour (cut-out) | 29 | 1929 | 1 | ||||
| Pass & Seymour (cut-out) | 30 | 1930 | 1 | ||||
| Pass & Seymour (cut-out) | 32 | 1932 | 1 | ||||
| Pettingell Andrews | 1893 | 198 | |||||
| O | Pettingell Andrews (Brunt SP, tubes, cleats, split-knobs, Brookfield, Elmer glass, Columbia, Jumbo, Locke glass, Fred Locke "Victor" and pin-types, Holmes, Brodie) | 1901 | 285 | ||||
| O | Pettingell Andrews (Brunt SP, tubes, cleats, split-knobs, Brookfield, Elmer glass, Columbia, Jumbo, Locke glass, Fred Locke "Victor" and pin-types, Holmes, Brodie, rubber ramshorn, Bryant fuse holder) | 12 | 1905 | 681 | |||
| Pettingell Andrews (Brookfield, Locke, misc) | 14 | 1910 | 43 | ||||
| O | Pettingell Andrews (cleats, nail knobs, split knobs, wall tubes, SP, P&S, railway, Locke pins, Locke glass, Locke porcelain, Brookfield, Brodie and Holmes tree insulator) | 14 | 1910 | 723 | |||
| Pettingell Andrews (Brookfield, Locke, misc) | 15 | 1914 | 67 | tiff | |||
| O | Pettingell Andrews (tubes, nail knobs, split knobs, Exemplar cleats, SP, White strain, Brookfield, Locke "Victor" unipart, multipart, and suspension, deadend spools, Holmes and Dunton tree insulators) | 18 | 1918 | 1216 | |||
| O | Pettingell Andrews | 22 | 1922 | 720 | |||
| Pettingell Andrews (Lynchburg, Illinois, Pinco, misc) | 25 | 1924 | 23 | ||||
| Pettingell Andrews (radio antenna bone insulator) | 1925 | 1 | |||||
| O. D. Pierce & Co. (UPW SP, pony, floor, rubber tubes) | 1893 | 108 | |||||
| O | Pinco | 1 | 1921 | 22 | |||
| O | Pinco | 3 | 1922 | 49 | |||
| O | Pinco | 4 | 1926 | 82 | |||
| O | Pinco (2 suspensions & hardware) | Supp. #1 | 1927 | 16 | |||
| O | Pinco (4 sections: General, Suspension, Pin Type, S & B) | 5 | 1936 | 174 | |||
| O | Pinco (The Hi-Line Hand Book) - suspensions | c. 1936 | 32 | ||||
| Pinco | 1941 | 28 | |||||
| O | Pinco | 49 | 1949 | 152 | |||
| O | Pinco | 301-62 | 1962 | 63 | |||
| Pittsburg | 1908 ? | 16 | |||||
| Pittsburg | 2 | ?? | 81 | ||||
| Pittsburg | 3 | 1913 | |||||
| O | Pittsburg (all kinds plus 5-PART multi!) | Export Cat. No. 20 | c. 1920 | 240 | |||
| Porcelain Products, Inc. | 1 | 1930 | 6 | ||||
| O | Porcelain Products, Inc. (pin-types, suspension, misc.) | 1 | 1930 | 62 | |||
| O | Porcelain Products, Inc. (specialty, bathroom) | 2 | 1931 | 25 | |||
| O | Porcelain Products, Inc. (Distribution Cutouts) | c. 1931 | 16 | ||||
| O | Porcelain Products, Inc. (neon signs) --- Bulletin No. 27 | c. 1931 | 8 | ||||
| O | Porcelain Products, Inc. (radio antenna) --- Bulletin No. 21 | c. 1931 | 5 | ||||
| O | Porcelain Products, Inc. (pin-types, suspension, mine, wireholders) | CPG-10 | 1935 | 90 | |||
| Porcelain Products, Inc. | 10 | 1937 | |||||
| O | Porcelain Products, Inc. (pin-types, suspension, mine, wireholders) | 17A | 1940 | 52 | tiff | ||
| O | Porcelain Products, Inc. (pin-types, suspension, mine, wireholders) | 20 | 1947 | 40 | tiff | ||
| Porcelain Products, Inc. (wireholders, clevis) | c. 1952 | 8 | |||||
| O | Porcelain Products, Inc. | 53 | 1953 | ||||
| Porcelain Products, Inc. (pin-types & suspension) | 1976 | 7 | |||||
| Porcelain Products, Inc. (pin-types & suspension) | 1982 | 8 | |||||
| Porcelain Products, Inc. (knobs, telephone, antenna, cleats, nail knobs, forestry, tubes) | 1984 | 2 | |||||
| Porcelain Products, Inc. (pin-types & suspension) | 1986 | 8 | |||||
| Porcelain Products, Inc. (pin-types & suspension) | 1992 | 8 | |||||
| Poter & Berg (SP) | 1904 | 1 | |||||
| Reliance Comm/Tec (plastic) | 1981 | 7 | |||||
| O | H. C. Roberts Electric Supply Co. (Locke, Imperial, New Lexington, Brookfield, SP, cleats, nail-knobs, tubes) | 18 | 1909 | 559 | |||
| O | Rochester Electrical Supply Co. (tubes, cleats, nail knobs, Hemingray, Westinghouse) | 1925 | 464 | ||||
| S. H. Supply Co. (cleats, tubes, SP, pony) | 37 | 1909 | 2 | ||||
| Salt Lake Electric Supply | 1897 | 149 | |||||
| Siemens Brothers & Co. (British porcelain, iron clad) | 11 | 1910 | 22 | ||||
| O | Southern Electric Co. (Holmes tree, Brookfield, Thomas, SP, nail-knobs, cleats, White strains) | 11 | 1918 | 883 | |||
| Southern New England Electric | 1929 | 18 | tiff | ||||
| O | Standard Electrical Supply Co. (Brookfield, Locke glass, Imperial, SP, GE knobs and cleats, P&S, tubes, wood cleats) | 1905 | 686 | ||||
| Stanley & Patterson, Inc. (Holmes tree, Brookfield, Pittsburg) | 19 | 1917 | 12 | ||||
| Stanley & Patterson, Inc. (Holmes tree, Brookfield, Pittsburg, nail-knobs, SP, cleats, White strain, Fort wireholder) | 19 | 1917 | 18 | ||||
| Steiner Electric Co. (Hemingray, Armstrong, Electrose) | 1942 | 4 | |||||
| Stewart (Frank H.) Electric Co. (tubes, P&S, SP, cleats, Murdock knobs, strain, Brookfield, Thomas) | 11 | 9 | |||||
| Stewart (Frank H.) Electric Co. (Brookfield, duplex pony) | 14 | 1 | |||||
| O | Stewart (Frank H.) Electric Co. (Brunt tubes and SP, Duggan cleats, B&D knobs, Murdock knobs, rubber hook, Dunton tree, Cutter, pins. Brookfield, New Lexington (Imperial), wood cleats) | 15 | c. 1908 | 540 | |||
| O | 'Stewart (Frank H.) Electric Co. (Brunt SP, strain, Cutter, Duggan cleats, wood cleats, Byrant cut-out, pins. Brookfield, Crown, Locke glass, Thomas) | 16 | 1909 | 796 | pdf/tiff | ||
| Stewart (Frank H.) Electric Co. (Thomas SP) | 22 | 1919 | 2 | ||||
| Stromberg-Carlson (Hemingray, glass knobs, Cutter, Victor split, strain, tubes) | 1910 | 7 | |||||
| Stromberg-Carlson (Hemingray, glass knobs, Cutter, Victor split, strain) | 1911 | 6 | |||||
| Stromberg-Carlson (Telodetective - the silent investigator of crime) | 1911 | 16 | |||||
| O | Stuart-Howland Co. (Brookfield, Locke glass, Knowles, Fred Locke, SP, Brodie tree, Holmes tree) | 1902 | 332 | ||||
| O | Stuart-Howland Co. (Brodie, Holmes, feeder, Brookfield, Locke glass, Thomas, SP, Brunt, GE) | 3 | 1907 | 784 | |||
| O | Stuart-Howland Co. (Brodie, Holmes, feeder, Brookfield, Locke porcelain, Knowles, Thomas, Pittsburg, SP, Brunt, GE) | 7 | 1912 | 1072 | |||
| Sun Electrical Co., LTD (porcelain pin-types, shackle, tubes, cleats, split knobs, knobs) | 5 | 1936 | 6 | ||||
| O | Superior Porcelain (knobs, cleats, spools, wireholders) | 1949 | 18 | ||||
| Superior Porcelain (old New Haven Porcelain) | 1972 | 17 | |||||
| O | Sweeten-Crossan Electric Co. (Brookfield, Knowles, Locke glass, Thomas glazeweld, SP, wood cleats, Thomas cleats, nail-knobs, tubes) | 15 | c. 1908 | 451 | |||
| T. C. White Co. | 24 | ||||||
| O | Taylor Goodhue & Ames (Brookfield, knobs, cleats, floor tube, Hammond cleat, E. L. knob) | 1893 | 212 | ||||
| O | Taylor Tunnicliff & Co. - Switch Gear Insulators | c. 1940 | 56 | ||||
| O | Thomas | 1904 | 20 | ||||
| Thomas (G. W. Thomas) | 1904 | 22 | |||||
| Thomas | 1907 | 71 | |||||
| Thomas ("Standard Porcelains", dry process pin-types, SP, nail-knobs, cleats, tubes, mine, strain) | c. 1910's | 48 | |||||
| Thomas ("Standard Porcelains", SP, cleats, tubes, strains, ) | c. 1910's | 30 | |||||
| Thomas | 12 | 1912 | 64 | ||||
| O | Thomas | 1915 | 39 | ||||
| O | Thomas | 16 | 1917 | 106 | |||
| O | Thomas | 19 | 1920 | 144 | |||
| O | Thomas - Standard Electrical Porcelain (before E. Liverpool closed in 1927) | 1920's | 30 | ||||
| Thomas (line wire protectors) | c. 1920 | 7 | |||||
| Thomas Standard Electrical Porcelain (SP, cleats, tubes, nail-knob, strains) | c. 1920 | 30 | |||||
| O | Thomas - Insulator Pins & Cross Arms | D-28 | 1928 | 37 | |||
| O | Thomas - Pin Type Insulators | 1928 | 64 | ||||
| O | Thomas - Suspension Insulators & Hardware | 1928 | 112 | ||||
| Thomas Insulator Pins and Cross Arms | D-28 | 1928 | 35 | ||||
| O | Thomas | 30 | 1930 | 463 | |||
| O | Thomas - Supplementary Catalog (to 1930 catalog), Lisbon | 1934 | 50+ | ||||
| Thomas (Supplement to catalog No. 30) | 1934-36 | 59 | |||||
| O | Thomas - Pedestal Ins. for Switch & Bus Supports | 1937 | 13 | ||||
| Thomas (Silent-Type) | 1938 | 6 | |||||
| O | Thomas (several sections in metal ring binder) | 40 | 1940 | 117 | |||
| O | Thomas (several sections in metal ring binder with 10 color introduction pages from 1953) | 40 | 1940, 53 | 127 | |||
| Thomas Standard Electrical Porcelain (SP, cleats, tubes, nail-knob, strains, crane, wireholder) | 1944 | 15 | |||||
| O | Thomas EEI-NEMA Standards (Pin-types, suspension, etc.) | 1956 | 8 | ||||
| O | Tower-Binford Electric & Mfg. Co. (Brookfield, Westinghouse, cleats, nail-knobs, tubes, SP, White strains) | 17 | 1917 | 792 | tiff/pdf | ||
| Trenton Porcelain Co. (SP, nail-knobs, Buckeye split knob, Findlay nail-knobs, cleats, strain, New Lexington "Crown" pin-types) | c. 1908 | 30 | |||||
| O | Union Electric Co. (P&S, wood cleat, Hemingray, Lima, Murdock, GE, nail knob, cleat, B&D, SP, tubes, brackets, pins) | 2 | 1908 | 794 | |||
| Union Electric Co. (nail-knobs, SP, cleats, White strain, mine, fittings, brackets, Hemingray, Lapp) | 8 | 1917 | 13 | ||||
| Union Electric Co. (nail-knobs, SP, cleats, strain, mine, fittings, brackets, Hemingray, Lapp, cleats, battery, J-M or GE trolley composition) | 9 | 1920 | 34 | ||||
| Varney Electrical Supply Co. (Hemingray) | 1913 | 1 | |||||
| O | Victor Insulators, Inc. | 1935 | 70 | ||||
| O | Victor Insulators, Inc. | 1937 | 17 | ||||
| O | Victor Insulators, Inc. | 1939 | 18 | ||||
| Victor Insulators, Inc. | 1941 | 4 | |||||
| O | Victor Insulators, Inc. | 1950 | |||||
| Victor (I-T-E) (fogbowl suspension & other fog types) | 101 | 1956 | 4 | ||||
| Victor (I-T-E) (manufacturer cross-reference) | 56 | 1956 | 23 | ||||
| Victor Insulators, Inc. (fogbowl, pin post, post) | 40R | 1985 | 11 | ||||
| O | Victor Insulators, Inc. (switch & bus insulators) | V300 | 1991 | 47 | |||
| O | Victor Insulators, Inc. (transmission & distribution insulators) | V200 | 1991 | 23 | |||
| Victor Insulators, Inc. (Bulletin #4) | ?? | 4 | |||||
| Victor Insulators, Inc. (Bulletin #8.1.1-1C) | ?? | 20 | |||||
| O | Victor Insulators, Inc. -- Kiln No. 3 | ??? | 12 | ||||
| W. G. Nagel Electric Co. (N-L "crown" ins., Hemingray, SP) | 1916 | 8 | |||||
| Walker & Kepler (SP, cleats, tubes, odd, Spanish slot-top) | 1894 | 20 | |||||
| Washington Electric (Hemingray, Westinghouse, dead-end, SP, cleat) | 19 | 1919 | 12 | ||||
| Washington Electric Supply Co. (Cutter lamp hangers) | 2 | ||||||
| Wesco Supply Co. (Hemingray, Pittsburg, Locke, strains, Locke dead-end, SP, cleat) | 400 | 1922 | 9 | ||||
| Western Electric Mfg. Co. (battery jars, battery insulator, Brooks, Ponds, Kenosha, CD 131) | 1877 | 17 | |||||
| Western Electric Mfg. Co. (Brooks, Ponds, La Bastie, Kenosha, CD 131) | 1878 | 4 | |||||
| Western Electric Mfg. Co. (battery jars) | 1880 | 5 | |||||
| Western Electric Mfg. Co. (battery jars) | 1882 | 4 | |||||
| Western Electric (rams horn, CD 127, porcelain knobs, Brookfield, cleat) | 1889 | 4 | |||||
| Western Electric (rams horn, CD 127, porcelain knobs, Brookfield, cleat) | 1890 | 9 | |||||
| O | Western Electric (lamp hangers, Brookfield, Liquid, Locke, SP, P&S, hook, cleats, Nashold cleat) | 1897 | 526 | tiff | |||
| O | Western Electric (SP, Brookfield, Liquid, Fred Locke, U-928B, P&S, rams horn, tubes, cleats, IXL cleat, wood cleat, rubber tubes, floor tubes) | 1898 | 555 | ||||
| Western Electric (lamp hangers, Brookfield, Liquid, Locke, SP, P&S, hook, cleats, Nashold cleat, glass tubes) | 1898 | 28 | |||||
| O | Western Electric (Locke, Hemingray, Liquid Insulator, Brookfield, Locke glass, Peru, SP, P&S, wood cleats, Holmes tree, tubes, cleats, knobs, floor) | 1901 | 1073 | ||||
| O | Western Electric, Standard Porcelain only | 1901 | 56 | ||||
| Western Electric (Thomas, Brookfield, Hemingray, Locke glass, SP, P&S) | 1904 | 24 | |||||
| O | Western Electric (Hemingray, Thomas glazeweld, SP, Holmes tree, P&S tubes, W and IXL and P&S cleats, knobs, floor) | 1904-05 | 593 | ||||
| Western Electric (SP, nail-knobs, Star Ideal knob, GE, tubes, P&S, Thomas, strain, Brookfield ) | 1908-09 | 25 | |||||
| Western Electric (Thomas, Brookfield, Hemingray, Locke glass, GE, SP, P&S) | 1908-09 | 41 | |||||
| O | Western Electric (SP, Odd, Electrose, cleats, Star knob, GE, P&S tubes, Thomas, Brookfield, composition, Cutter hangers, Holmes tree, rams horn) | 1908 | 838 | ||||
| O | Western Electric (SP, Odd, Electrose, Thomas, Hemingray, Brookfield) | 1915 | 1216 | ||||
| O | Western Electric (SP, Odd, Electrose, Thomas, Hemingray, Brookfield. Tubes, nail knob, cleats, strain, Holmes tree) | 1916 | 1504 | ||||
| O | Western Electric (SP, Odd, Electrose, Thomas, Hemingray, Brookfield) | 1917 | 1312 | ||||
| O | Western Electric (SP, Odd, Electrose, Thomas, Hemingray, Brookfield. Tubes, nail knob, cleats, strain, Holmes tree) | 1918 | 1160 | ||||
| O | Western Electric (bound bulletins) | c. 1918 | |||||
| O | Western Electric (SP, Electrose, Thomas, Brookfield, Tubes, nail knob, cleats, strain, Holmes tree) | 1919 | 1120 | ||||
| O | Western Electric (SP, Odd, Electrose, Thomas, Hemingray, Brookfield, Tubes, nail knob, cleats, strain) | 1920 | 1248 | ||||
| O | Western Electric (SP, Odd, Electrose, Thomas, Hemingray) | 1922 | 1309 | ||||
| O | Western Electric (SP, Thomas, Hewlett, Electrose, cleats, nail knob, Hemingray, tubes, radio antenna, Peirce) | 1924 | 904 | ||||
| O | Western Electric (Hemingray, Thomas knobs and cleats) | 6 | 1925 | 350 | |||
| O | Western Electric (Graybar) (Hemingray, Thomas, Hewlett, Thomas strains and radio strain) | 1926-27 | 1012 | ||||
| O | Western Electric Telephone Apparatus -- Graybar (Hemingray, Thomas strain, knobs, tubes, Peirce) | 7 | 1929 | 400 | |||
| Western Electric (Hemingray, SP) | ?? | 8 | |||||
| Western Electric Year Book (Hemingray, Thomas strain and antenna, Thomas pin-type) | 1926-27 | 3 | |||||
| Western United Electric Supply (Joslyn) | ?? | 4 | |||||
| Westinghouse (Hemingray) | 10 | 1909 | 6 | ||||
| Westinghouse (Hemingray) | 1916 | 32 | |||||
| Westinghouse (Hemingray, No. 41) | 1917 | 82 | |||||
| Westinghouse | 1919 | 44 | |||||
| O | Westinghouse | 1920 | 1456 | tiff/pdf | |||
| O | Westinghouse | 1921-22 | 1311 | ||||
| Westinghouse | 1923 | 6 | |||||
| O | Westinghouse | 1923-1924 | 190 | ||||
| Westinghouse | 1925 | 12 | |||||
| Westinghouse | 8687 | 1926 | 30 | ||||
| Westinghouse | 1925-27 | 40 | |||||
| O | Westinghouse | 8687 | 1926-1928 | 188 | |||
| Westinghouse | 1928 | 16 | |||||
| O | Westinghouse | 213 | 1931 | 73 | |||
| Westinghouse (deadend spools) | 1935 | 1 | |||||
| O | Westinghouse | 1936-1938 | 80 | ||||
| O | Westinghouse | 1939-1940 | 1228 | ||||
| Westinghouse (suspension) | 1941 | 10 | |||||
| O | Westinghouse | 100 | 1949 | 894 | |||
| Westinghouse | 1951 | 7 | |||||
| Westinghoue (Hemingray) | 1959 | 1 | |||||
| O | Wetmore-Savage Co. (Pittsburg, Imperial, Brookfield, tubes, SP, Dunton tree, Brodie tree, Hemingray knobs, floor, nail-knobs, cleats, fuse cut-outs) | 5 | 1911-12 | 1053 | |||
| Wetmore Savage (Hemingray, Westinghouse) | 1929 | 1 | |||||
| O | A. J. Wilkinson & Co. Electrical Goods | 1891 | 81 |