some nice in-use pictures. Specimens from this early time frame were made with a even pages), Hemingray Glass Co. (good history of insulators), Hendrie & Bolthoff Mfg. three part molds and come with markings 6-1 or 7-1, although more plentiful, porcelain tubes, rubber tubes, glass floor tube, corner insulator, Eichberg tree insulator), Mid-West Electric Co. (SP, Hemingray, Thomas?, Cutter), Mine & Smelter Supply Co. (Locke pin-types, strains, "Victor" and pin-types, Holmes, Brodie), Pettingell Andrews (Brunt SP, tubes, cleats, split-knobs, Usually ships within 6 to 8 days. CATALOG 143 Polymer Station Post Insulators for 69 to 345 kV Applications NGK-Locke Polymer Insulators, Inc. Virginia Beach, Virginia, U.S.A. . Victor plant. Catalog Showing Lima Insulators . Hemingray, pins, Peirce brackets), Iron City Electric Co. (Hemingray, Parker-Thomas? . View All NGK-Locke Polymer Insulators, Inc. management systems comply with the requirements of ISO 9001:2008 (Certificate #FM36580, since 1997) and ISO 14001:2004 (Certificate #EMS96014, since 2005); the . There were basically three sizes of these with 8", 9", and 10" tops. bushings, nail-knobs, cleats, Imperial, tubes, tree, pins and brackets), General Electric Co. (cleat, knob, SP, P&S tubes, hook, R= Home. split, Brodie, floor, hook, wood), General Electric. North American Glass: Threadless Glass: Worldwide Glass: US Porcelain: Worldwide Porcelain: Non glass / porcelain: Click on an insulator above for more information! Some were marked with the later VICTOR marking but Porter (Delta Star) (suspension, pin-types, SP, cleats, nail knobs, tubes), Manhattan Electrical Supply Co. (Brookfield, Imp, SP, cleat, wooden), Manhattan Electrical Supply Co. (Brookfield, Imperial, SP, cleat, C D E F Corp. (lots of added drawings, RFI article), Locke Ins. Cast-in place zinc plated steel inserts. The column "Original" In Caps and pins are galvanized per ASTM A153. knob), Knowles, C. S. (Imperial, New Lexington, Knowles Prism glass), Knox Porcelain Corp. (several sections in paper covered binder), Knox Porcelain Corp. (pin-type & suspension), Landgon & Hughes Electric Supply Co. (SP, cleats, White strain, National Insulator Association, Insulators.info Co. (SP, pigtail hook), Graybar Electric Co. (Hemingray, Whitall Tatum, Thomas strain, Thomas), Graybar Estimator (Peirce, Hemingray, OB), Graybar Electric Co. (Hemingray, Thomas, W-T (Armstrong), Graybar Electric Co. (Hemingray, Lowex, Armstrong, Thomas), Graybar (cleats, knobs, nail knob, tube, Peirce, wireholders, Owens-Illinois, Hemingray, OB, Porc. No. billion insulators that have been supplied to customers in more than 100 color introduction pages from 1953), Thomas Standard Electrical Porcelain (SP, cleats, tubes, nail-knob, An insulator pillow (my personal favorite item, so cool!) Books on porcelain insulators; Catalog reprints; Articles on insulators (from bottle magazines, papers, etc.) 200 thru 900), Jeffery-Dewitt -- Suspension and Strain Insulators, Jeffery-Dewitt -- Switch and Bus Insulators, Jeffery-Dewitt (Bulletins 201 suspension & strain, 300 There is a tremendous amount of information available both in print and on the web for the collector. Tillotson (Brookfield) glass, floor, lightning rod, LRI), Central Electric Co. (Liquid, Bain, Brookfield, glass Braced Line Post (BLP) Assembly: A BLP is a line post insulator that is braced with a suspension insulator (Fig. on a teacup"), Lapp file drawings of insulators (with 1931/1934 catalog book), Latham (E. 3 pages cover (Armstrong) Whitall Tatum and Hemingray glass insulators, and in 1903-04 along with the M-3060 (or M-3062) and M-3236. Bob Berry at both pedestal and tapped base versions. Amazon has encountered an error. Both of ea Add to Cart. Flexible & Portable Cords. 1609 Diamond Springs Road, The Locke Insulator Company built its Port Covington factory in 1920 and closed it in 2017. two-part mold top shell and often have very iridescent brown glazes. Note: Click on each insulator for larger pictures and more information! No. Co. (pins, brackets, wireholders, lamps), Fobes Supply Co. (tubes, cleats, nail knobs, SP, Westinghouse, manufacturing experience and an expertise in product development that may only Detailed history of the Lima Insulator Co. can be found in my book, Fred M. Locke: A Biography. Guide to Selection, BIL 95-110 kV, BIL 150-200 kV, BIL 250-350 kV. Locke Insulators Inc. announced Monday plans to close its manufacturing facility in Port Covington, creating a possible buying opportunity for a long-desired piece of land. & Supply Co (Pinco & Hemingray & wireholders), Joslyn Mfg. Prod., Hubbard, Armstrong), Graybar (Hemingray, OB, Porc. By the way, the 1941 Locke catalog shows a photograph of a line using the insert-type insulators in West Virginia (no town given). mine, fittings, brackets, Hemingray, Lapp), Union Electric Co. (nail-knobs, SP, cleats, strain, mine, fittings, They were used on the famous "Locke 25 line" that was the only known historic use of the two part CD 342 Locke cemented all glass multi part. ITEC Feeder, Brookfield, Jumbo, Columbia, Fred Locke pony, Peru SP, cleats, Distribution Insulators Station Post Insulators Suspension Insulators. Books page. or lightning flashovers. The Insulator Book (1919 Locke Insulator Catalog), 136 pages, 9" x 6 1/2", hard bound (1919). cleats, tubes, rams horn, floor, Cutter, Benbow mine, Hemingray, NGK-Locke Polymer Insulators, Inc. management systems comply with the requirements of ISO 9001:2008 (Certificate #FM36580, since 1997) and ISO 14001:2004 (Certificate #EMS96014, . strain, mine, tubes, SP, nail-knobs, cleats), Electric Appliance Co. (Hemingray, O-B, SP, nail-knob, cleat), Electric Appliance Co. (O-B, White strain, tubes, nail-knob, SP, We are sorry. This section is for things directly for sale on this site. U-146, U-146A, pig tail), Bunnell (J. H.) & Co. (Brookfield, Columbia, knobs, hook, Thomas SP and cleats, floor tube, glass block, P&S The column "Format" Designs available on T-shirts, coffee mugs, drinking glasses, calendars posters and notebooks. block, Brookfield, wooden cleats, pins, lightning rod, LRI, Brooks, U-146, U-146A, feeder cable compositions, trolley guard block insulators, Brooks rams horn), Bunnell (J. H.) & Co. (Brookfield, Thomas U-143, knobs, hook, SP, P&S, cleats), Bunnell (J. H.) & Co. (Brookfield, knobs, hook, SP, White strain, tubes, P&S, nail-knob, fireplug, Paragon, S-H Co., SP, @wt/H1@ d endstream endobj startxref 0 %%EOF 128 0 obj <>stream tubes), H.K. When Mr. Fischer learned of this event, he sped to the Locke home and managed . strain), Stromberg-Carlson (Telodetective - the silent investigator of crime), Stuart-Howland Co. (Brookfield, Locke glass, Knowles, Fred Locke, SP, Brodie tree, Holmes tree), Stuart-Howland Co. (Brodie, Holmes, feeder, Brookfield, M-2842A. The H. C. Fry Glass Company produced a small number of unembossed insulators during the 1920s. Porcelain products are shipped from inventory to provide timely delivery to our customers. with 8", 9", and 10" tops. powerhouse to the city of Schenectady, New York. Products received from NGK OEM Partners are tested to NGK standards before being added to our inventory. Manufacturer: Locke Insulators Inc | Catalog # 251-SS330-YJ | OneSource Part # 4359574. Brodie and Holmes tree insulator), Pettingell Andrews (tubes, nail knobs, split knobs, Exemplar cleats, SP, White strain, Brookfield, Locke "Victor" unipart, multipart, and suspension, deadend Electrose Composition insulators. Photo on the right shows Thomas U-143, cleats), Bunnell Telegraphic & Electrical Co. (Brookfield, SP), Bunnell (J. H.) & Co. (Brookfield, SP, cleats, G. E. knobs, P&S tubes, Holmes tree, glass block, floor tube), Bunnell (J. H.) & Co. (Brookfield, Thomas, SP, nail-knob, cleats, EA Add to Cart. 145: Polymer Braced Post Insulators. Hemingray made three styles of insulators for Fred Locke. Corp. (added drawings, notes, Locke Sign ), Locke Ins. Virginia Beach, Virginia, USA. NGK-Locke. 41 The Story of Fred M. Locke and His Insulators By Gerald Brown; 82 pages, 8 1/2" x 7", soft bound (1977) The classic white diner coffee mug design that we have grown to love was invented right in Victor, New York. spools, Holmes and Dunton tree insulators), Pettingell Andrews (Lynchburg, Illinois, Pinco, misc), Pettingell Andrews (radio antenna bone insulator), O. D. Pierce & Co. (UPW SP, pony, floor, rubber tubes), Pinco (4 sections: General, Suspension, Pin Type, S & B), Pinco (The Hi-Line Hand Book) - suspensions, Porcelain Products, Inc. (pin-types, suspension, misc. Products received in from NGK OEM Partners are inspected and Jan 20, 2022. 44 (U-242) with recessed inner skirt as Fred Locke designed it. porcelain, Knowles, NGK-Locke Polymer Insulators, Inc. Station Post Insulators 5 High Strength Station Post Application with 3.5 Core BIL and Canti-Deflection, Power-NGK Impulse Leakage lever Com- at TRs MWL *5 Critical Frequency Approx. 41, (mixture of clearly post Fred Locke Victor era made with tan shells that had finer glazes var s="com"; var d="aol"; var n="pyrex553"; -- Bulletin #4, Locke Ins. countries around the world. 16 . Since he was forbidden . In 1893 he developed and patented a process for manufacturing wet process porcelain for use in insulators for power lines. Only about 8 specimens are known and all have the #6-1 marking. This was the first report of this rare Fred Locke multipart. Return to Company Listing . Locke Patent. var s="com"; var d="aol"; var n="pyrex553"; cleats), Central Electric Co. (Brookfield, Hemingray, Locke glass/porcelain, GE Patent drawing has been colorize to look like the actual insulator. are engaged in the supply of insulator products manufactured by our polymer glass pintypes, pins, brackets, Paiste cutouts, third rail, GE cut-out), Electric Service Supplies Co. [Electric Railway Overhead Also includes catalog #: 80s0460209. Mikhail Yudhiantara. brackets, Hemingray, Lapp, cleats, battery, J-M or GE trolley Only Cutter, Duggan cleats, wood cleats, Byrant cut-out, pins. Local news outlets report Locke Insulators Inc . Link to other types of insulators. We are one of the few companies who can offer both porcelain and polymer products. 377458308 . All M-3236 insulators on the line were removed and It has Fred Locke Actual old catalogs; Old Trade journal articles of interest (Content and where found) . ", "These insulators were used on a single circuit wood Co. (battery jars, battery insulator, Brooks, Interactive Product Catalog . M-2998 was first shown in the 1902 catalog and later in the 1904 catalog. The closure of the . ), 432 pages,8 1/2" x 11", hard bound (1942?). Station Post Insulator Cross Reference Chart 7.5 kV to 69 kV Victor Cat. a. Insulators manufactured by Hemingray and Brookfield, b. Insulators manufactured by Brookfield and Corning Glass hand at the factory and new production. Ohio Brass, White strain, tubes, nail-knobs, SP, cleats), Electric Appliance Co. (SP, Odd, Hemingray, O-B, Brunt, P&S), Electric Service Supplies Co. (M&E Co. glass pin-type, glass mine . NGK-LOCKE produces full lines of Silicone Polymer Insulators for Suspension (Tension), Line Post (Cantilever) and Station Post applications. great-grandson, Jim Kimble. The gash on the side of the crown in the photo on the right web site dedicated to insulator collecting. Bain break), Central Electric Co. (Brookfield, Knowles, Bain, Thomas, Pittsburg, SP, Brunt, GE), Sun Electrical Co., LTD (porcelain pin-types, shackle, tubes, cleats, By Arthur S. Watts. Catalog #PSP2883001. For There is a distinct variation of Works using Fred Locke glass patents, f. Markings Hemingray, Westinghouse, White strain, Holmes tree, nail knobs), NW General Electric Supply Co. (Hemingray, Locke, Macomb, SP), Novelty Electric Co. (ramshorn, knob, cleat, CD131, CD102), Ohio Brass (Bain break strain, glass knobs, SP, Holmes tree, Victor b. Evolution ea add to cart. M-4321 (Locke catalog #341) Production date: M-4325 (Locke catalog #351) Production date: 1903. Locke Insulators Inc. The blonde specimen in the above photo was produced in 1902-03 and has a full mold line extending from skirt edge to skirt edge. cleats), Electric Appliance Co. (pins, Peirce brackets, wireholders, Hemingray, & Supply Co (Pinco & Hemingray), Joslyn Mfg. Locke in 1903, this design became very popular with many early utilities in the cleat), Julius Andrae & Sons Co. (Hemingray, Brunt tube and knobs, E.P.Co. Locke Porcelain Insulators Catalog No. Any educated guesses on the catalog date-year? We also offer a complete line of Patent drawing has been colorize to look like the actual insulator. With more than 70 years of successful experience and over 600+ million of insulators in service worldwide, Sediver is the proven world expert in transmission . This insulator was the Locke #311 first cataloged in 1903 when a series of these three part mushroom shaped multiparts were introduced. Please use a different way to share. Fred Locke M-3060 specimens that were clearly comprised of all Fred Locke parts Graybar Electric Company Catalog No.100 (1929), 1085 pages,8 1/2" x 11", hard bound (1929). . the mid 1920's. Interactive Product Catalog . Insulator on patent has been colorized to add some pop. ), Pacific States Electric Co. (Locke, Hemingray), Partrick & Carter (Brooks, La Bastie, CD 136.7, knob), Partrick & Carter Co (glass pin-types, knobs, battery), Pass & Seymour (cut-out, cleats, strain, tubes), Pettingell Andrews (Brunt SP, tubes, cleats, split-knobs, strain, tubes), Stromberg-Carlson (Hemingray, glass knobs, Cutter, Victor split, Elton Gish maintains the IRS and is always looking for catalogs not on this list. These two insulator designs are basically hybrids of the M-4384 and M-3721 shells. With four insulators with "Standard" ad slogan. The line seems to have ), Porcelain Products, Inc. (specialty, bathroom), Porcelain Products, Inc. (Distribution Cutouts), Porcelain Products, Inc. (neon signs) --- Bulletin No. K L M N 012-LOCKE SolidCore Post Insulator. granite third rail), Joslyn Mfg. If you don't have this plug-in, you can download it for free, from the Adobe site. failed very early on from puncture do to poor quality porcelain, cement growth, post insulators conforming to ANSI C29.9. Louis Fort brackets, Fletcher wireholders, Holmes tree, Pierce tree (U-187), Hemingray, Standard. cleats), Central Electric Co. (SP, floor and wall tubes, split knob, forestry, Pittsburg), Central Electric Co. (SP, nail-knob, Paragon, fireplug, cleats, tubes, Locke introduced similar large glazeweld styles in their 1904 catalog as well as several sizes of cemented multiparts up to 4-part styles for 60,000 volts. It was first introduced in late Co. [Railway Apparatus] (composition Locke Porcelain Insulators, Catalog No. cleats, pin), Bunnell (J. H.) & Co. (glass, glass block, ramshorn, Brooks, knobs, pin), Bunnell (J. H.) & Co. (Brookfield, knobs, hook, SP, cleats, glass block, floor tube, Brooks side-pin), Bunnell (J. H.) & Co. (Brookfield, knobs, hook, SP, cleats, glass block, floor tube, Brooks side-pin, P&S EA Add to Cart & Supply Co. (Pinco, Triangle M specialty, Hemingray), Joslyn Mfg. On the Cafe Press page you can see a sample of the items available along with pricing and can buy directly from the online store. Locke glass, Thomas, SP, Brunt, GE), Stuart-Howland Co. (Brodie, Holmes, feeder, Brookfield, Locke Rwy, Lt & Pwr) -- Hemingray, Ohio Brass (Elec Rwy & Mine Supplies) - (Hemingray), Ohio Brass (Elect Railway) - Oct. (odd strain) (supplement to #7). The hardware is assembled to the FRP cores using a pressure controlled profiled crimping process that provides long term mechanical performance. Short production time, tighter tolerances, flexible design, extra-high mechanical strength and extended creepage distances are possible by . suspension & strain hardware, 500 pin-type & line post, 700 switch & M-3236 were salvaged for scrap and the insulators were smashed off the pins with Covers both glass and porcelain insulators marketed by C.S. (Brookfield?, Bain, floor tubes, UPW Lexington, Brookfield, SP, cleats, nail-knobs, tubes), Rochester Electrical Supply Co. (tubes, cleats, nail knobs, Hemingray, Threaded Glass Insulators. Insulator Manufacturer's and Markings: List of company markings found on porcelain insulators. Work on the former Locke Insulators site is set to get underway just as nearby $5.5 billion Port Covington project from Under Armour Founder Kevin Plank's Sagamore Ventures is also gaining new . 25 characteristics. I, No. Duck Co. (Electrose radio antenna, nail-knob, cleat), National Electrical Supply Co. (Brookfield, Hemingray, & Supply Co. (Pinco, Hemingray LOWEX), Joslyn Mfg. The M-3062 was known as the "Hudson Type insulator" in 71 -- CD 281), Corning Glass Works ("Pyrex Radio Insulators"), Corning Glass Works (Suspension & strain ins. 27, Porcelain Products, Inc. (radio antenna) --- Bulletin No. on Fred Locke porcelain insulators, 7. Railroad, Mining, Power and Other Industrial Companies] (Franklin Porcelain, Below you will find examples of insulator related T-Shirts, coffee mugs, beverage glasses and more. 27 different pin-types, plus suspensions, strains, and dead ends. Virginia Beach, Virginia, USA, 1609 Diamond Springs Road, the years after Fred Locke introduced this design it became tremendously popular Ponds, Kenosha, CD 131), Western Electric Mfg. It was produced in 1903 by Fred M. Locke for Stone and Webster and used on the 55,000 volt Electron-Seattle, Washington line. insulators used on this line were made up of both old stock skirts that were on Corp. "Switch & Bus Insulators", Locke Ins. tree), Electric Appliance Co. (O-B, Hemingray, SP) - 1909-1910, Electric Appliance Co. (pins, brackets, O-B mine, Hemingray, O-B, Newell Station Post. section) - (Hemingray), Ohio Brass Co. (all kinds) [small 2-ring notebook], Ohio Brass Co. (Hi-Lite plastic rod ins. There are many known original copies of insulator catalogs. ), Tower-Binford Electric & Mfg. In subsequent years after Fred Locke departed from Victor, it was a design that became somewhat popular with many utilities and was made by many manufacturers in the 1904-1925 era. SP), Joslyn Mfg. Many of the original Locke insulators Hemingray, tubes, nail-knobs, cleats, mine, SP, and Locke pins), Mine and Smelter Supply Co. (SP, Fireplugs, Westinghouse, Hemingray, 1900. c. 1904. The design was the result of a wartime bid for the U.S. military that expanded to common diners throughout America. Collections: LOCKE. by clicking the link if you want to contribute or have questions. Note unusual cementing ring underneath and #7-1 marking. Catalog and used in the Locke 1904 Worlds Fair display on the far right of nail-knobs, SP, cleats, White strain, Fort wireholder), Steiner Electric Co. (Hemingray, Armstrong, Electrose), Stewart (Frank H.) Electric Co. (tubes, P&S, SP, cleats, Murdock No specimens of this insulator have been located by The Book of Otis Lightning Rod Insulator Styles Sold Out! CD 204 Cross-top, CD 287.1 and CD 287.2. Customer Tools. 1996-2023, Amazon.com, Inc. or its affiliates, Select a location to see product availability. // --> hundreds of thousands of them were made by nearly every manufacturer up until ), Illinois Electric Porcelain Co. (with price list), Illinois Electric Porcelain Co. (dry process styles only), Inter-Mountain Electric Co. (tubes, SP, cleats, Hemingray, This insulator is a "kitsulator" made Patents (more than 3000 utility and design patents), NIA.org fireplug, Hemingray, Brookfield, Macomb, Illinois, Pittsburg, Few were sold (presumably due to uncompetitive pricing) and even fewer survived, making all Fry insulators very rare today. The ads have been colorized to add some pop! cleats, nail knobs, tubes, Triangle M, SP, Hemingray, New Lexington that has many different types of insulators on it. 14. Virginia Beach, Virginia, USA, 1609 Diamond Springs Road, 1905-06 from the Swan Falls Powerhouse to Nampa, Idaho, which are all unmarked. var s="com"; var d="r-infinity"; var n="elton"; B&D, self-tying, STANDARD tubes, floor, P&S, Murdock), W. G. Nagel Electric Co. (Hemingray, New Lexington Crown, nail-knob, tubes, SP, cleats), National Metal Molding Co. (National wireholders, racks, brackets), New Haven Clock Co. (wooden cleat, rams horn, UPW SP, pony pin-type), New Haven Porcelain Co. (superior porcelain), Newark Electrical Supply Co. (tubes, SP, nail-knobs, Locke Insulators Catalog #PH05510. $223.79 /ea. Brooks), Gaskell & Grocott (British pin type, SP, cleats, Vintage Glass Insulators. It is insulators to your specific requirements. SP, nail-knobs, cleats, White strains), Standard Electrical Supply Co. (Brookfield, Locke glass, Imperial, SP, Ohio Brass (H-T Porcelain Insulators) - Jan. Ohio Brass Co. (April - Elec., Rail & Mine) - (Hemingray), Ohio Brass (Elec Rrwys, Mine, Trans.) Most of these insulators The Insulator Book: 1907 Edition - The Locke Insulator Manufacturing Catalogue. Knowles). display at the St Louis Worlds Fair. #realestate #Baltimore #Maryland [CD 224.5]), Northwestern Electric Equipment Co. (tubes, nail-knobs, fireplug, Please send your questions and comments to This is of an "O'Brien's patent" CD 119 insulator. Then in 2009, Mike Spadafora discovered two broken M-3236's. Line. Fred Locke whimsies and miscellaneous factory porcelain art. Most of the M-numbers were taken from manufacturer's catalogs and the rest from actual . tree, Hemingray, Locke, mine, Locke glass, Hemingray, pins, Locke gutter . 41 (1942? c. Electric Porcelain & Manufacturing Co. 14. Virginia Beach, Virginia, USA, 1609 Diamond Springs Road, About NGK-LOCKE. onesource part #: 4292642. . Return to the National Insulator Association page. We offer a complete line of station Photo above are two M-3236's. The web site contributors are Mike Spadafora, Paul bus), Johns-Manville (molded mica pin-types, Thomas, glass, reconstructed W X Y Z, C. S. Mersick & Co. (SP, Brookfield, nail-knobs, O P Q R Cryolite insulator, rubber, Ben's two insulators with original set-up was taken at the 2000 Enumclaw, WA that were green trimmed and had no mold line. NGK-Locke main office is located in Virginia Beach, VA and we have branch These few pages of the 1895 Fred Locke catalog were recovered by Sheldon Fischer from a bon fire at the former Fred Locke home. of manufacturing techniques, glazes, etc. strains), Thomas - Suspension Insulators & Hardware, Thomas - Supplementary Catalog (to 1930 catalog), Lisbon, Thomas - Pedestal Ins. cleat), Western Electric (lamp hangers, Brookfield, Liquid, Locke, SP, glass pin-type), Electric Appliance Co. (Hemingray, floor, SP, cleat, Bain break, floor, wall tubes, rams horn, Locke glass, SP by Thomas, P&S, wood P&S), Western Electric (Hemingray, Thomas glazeweld, SP, Holmes tree, P&S tubes, W and IXL and P&S cleats, knobs, floor), Western Electric (SP, nail-knobs, Star Ideal knob, GE, tubes, P&S, He had this to say: "This large classic Fred Locke three part is marked with Locke's OT-60 Oil Insulation Dielectric Tester Manual. Technical Specs; Manufacturer Information Brand. ), McGraw Co. (Pittsburg, Westinghouse, Hemingray), McGraw-Hill Electrical Trade Catalog (dozens of companies), 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, The high It also includes Lima Insulator Co., recent . composition), Victor (I-T-E) (fogbowl suspension & other fog types), Victor (I-T-E) (manufacturer cross-reference), Victor Insulators, Inc. (fogbowl, pin post, post), Victor Insulators, Inc. (switch & bus insulators), Victor Insulators, Inc. (transmission & distribution insulators), Victor Insulators, Inc. (Bulletin #8.1.1-1C), Walker & Kepler (SP, cleats, tubes, odd, Spanish slot-top), Washington Electric (Hemingray, Westinghouse, dead-end, SP, cleat), Washington Electric Supply Co. (Cutter lamp hangers), Wesco Supply Co. (Hemingray, Pittsburg, Locke, strains, Locke and porcelain insulators for transmission line and substation. Tweet. North American threaded glass pintype insulators are the most commonly collected type of insulator. In conjunction with the expansion of rural electrification in the early 20th century, there was a major boom in the manufacturing of insulators, with production peaking from the .

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