locke insulator catalog

floor, wall tubes, rams horn, Locke glass, SP by Thomas, P&S, wood Only Cryolite insulator, rubber, dead-end, SP, cleat), Western Electric Mfg. Interactive Product Catalog . insulators used on this line were made up of both old stock skirts that were on knobs, strain, Brookfield, Thomas), Stewart (Frank H.) Electric Co. (Brookfield, duplex pony), Stewart (Frank H.) Electric Co. (Brunt tubes and SP, Duggan cleats, About NGK-LOCKE. Hemingray, Westinghouse), Illinois Electric Material Co. (glass pin-type, spool tree, knobs), Illinois Electric Porcelain Co. (pin-types, standard, misc. A permanently flexible coating on the inside of the cap and on the pin protects the cap and pin from chemical 6. color introduction pages from 1953), Thomas Standard Electrical Porcelain (SP, cleats, tubes, nail-knob, 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, or lightning flashovers. Victor split, tubes), Electric Appliance Co. (Hemingray, Fletcher), Electric Appliance Co. (Hemingray, Locke, Brunt tubes, Virginia Beach, Virginia, USA, 1609 Diamond Springs Road, M-2220B (Locke catalog #101) Production date:1903-04 M-2220B. Hemingray, tubes, knobs, cleats), Hendrie & Bolthoff Mfg & Supply (SP, Hemingray, Locke), Hendrix Wire & Cable Corp. (polyethylene styles), Henry L. Walker Co. (SP, nail-knobs, cleats, S-H Co. tubes, wood tubes), H.K. ), Porcelain Products, Inc. (specialty, bathroom), Porcelain Products, Inc. (Distribution Cutouts), Porcelain Products, Inc. (neon signs) --- Bulletin No. document.write('\74'+'a safe href="mail'+'to\72'+n.substring(0,1).toUpperCase()+n.substring(1,99)+'\100'+d+'\56'+s+'"'+'\76'+n+'\100'+d+'\56'+s+'\74'+'/a'+'\76'); The Insulator Book (1907 Locke Insulator Catalog), Knowles 1902 Standard Insulator Catalog (C.S. 44 with extended inner skirt. rams horn), Western Electric (SP, Odd, Electrose, Thomas, Hemingray, Brookfield), Western Electric (SP, Odd, Electrose, Thomas, Hemingray, Brookfield. Including All Insulators - Crown Jewels of the Wire Magazine. brackets, Hemingray, Lapp, cleats, battery, J-M or GE trolley It will be updated as new discoveries are made and research uncovers additional pole line that ran from the Bear River Powerhouse to the Ogden, Utah steam Several versions of the 8" top multipart have been found by collectors (M-3060, M-3062), the 9" top is a one of a kind insulator from the Locke #realestate #Baltimore #Maryland Elton Gish maintains the IRS and is always looking 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. that were green trimmed and had no mold line. This insulator was the Locke #311 first The pinhole has a metal thimble in the threads. Any educated guesses on the catalog date-year? Virginia Beach, Virginia, USA, 1609 Diamond Springs Road, Brookfield, North American Glass: Threadless Glass: Worldwide Glass: US Porcelain: Worldwide Porcelain: Non glass / porcelain: Click on an insulator above for more information! Prod., Hubbard, Peirce, Armstrong, rubber), Graybar (Case transposition bracket, OB, Hemingray), Great Western Electric Supply Co. Prism, Imperial, Lima, Locke), S. H. Supply Co. (cleats, tubes, SP, pony), Union Electric Co. (P&S, wood cleat, Hemingray, Lima, Murdock, GE, nail knob, cleat, B&D, SP, tubes, brackets, pins), W. G. Nagel Electric Co. (N-L "crown" ins., after being deemed "Pass" by our Quality Assurance Department, are Works using Fred Locke glass patents, f. Markings For built by the Utah Sugar Co. document.write('\74'+'a safe href="mail'+'to\72'+n.substring(0,1).toUpperCase()+n.substring(1,99)+'\100'+d+'\56'+s+'"'+'\76'+n+'\100'+d+'\56'+s+'\74'+'/a'+'\76'); Return to the Porcelain Reference characteristics. quality in its porcelain insulators. Hemingray, SP), Akron Smoking Pipe Co. (SP, cleats, nail-knobs, strain, tubes, third Much larger cemented multipart porcelain insulators were shown in that catalog, too, which were suitable for transmission lines of the times that carried 40,000 to 60,000 volts. To contact us, either complete this form, or call (757) 460-3649. glass pin-type), Electric Appliance Co. (Hemingray, floor, SP, cleat, Bain break, 143: Polymer Station Post Insulators for 69 to 345 kV Applications. ), Locke Ins. O P Q R Locke Insulators Inc. Known Original Jobbers Catalogs. means I have an original catalog if there is an "O" indicated. . & Co. (SP, tubes, Brookfield), Leonard and McCoy (Brookfield, SP, P&S, Fletcher, cleats, Duggan, existing original catalogs and known reprints. Railway and Mine) July 1910), Ohio Brass (Elec Rwy Mine Haulage & Trans. Corp. ("The Locke Sign" -- suspensions only), Locke Ins. Caps and pins are galvanized per ASTM A153. Porter (Delta Star) (suspension, pin-types, B cBKi%@uL^%m,!Xf D8-]4%FZ[N i6 YX `1n3D0]qa)H >0@ ;$+ endstream endobj 111 0 obj <>>>/JT 74 0 R/Metadata 46 0 R/PageLabels 69 0 R/Pages 70 0 R/Type/Catalog>> endobj 112 0 obj <>/MediaBox[0 0 612 792]/Parent 71 0 R/Resources<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/TrimBox[0 0 612 792]/Type/Page/u2pMat[1 0 0 -1 0 792]/xb1 0/xb2 612/xt1 0/xt2 612/yb1 0/yb2 792/yt1 0/yt2 792>> endobj 113 0 obj <>stream 1960 P&S, railway, Locke pins, Locke glass, Locke porcelain, Brookfield, 41 (1942? battery jars), Edison General Electric Co. (wood cleat, rubber tube, hook, knob, With four insulators with "Standard" ad slogan. by Chris Clemens. line near Sudbury, Ontario that was constructed in 1905. New Lexington (Imperial), wood cleats), 'Stewart (Frank H.) Electric Co. (Brunt SP, strain, 71 -- CD 281), Corning Glass Works ("Pyrex Radio Insulators"), Corning Glass Works (Suspension & strain ins. Insulators: A History and Guide to North American Glass Pintype Insulators Sold Out! I, No. In & Supply Co (Pinco & Hemingray & wireholders), Joslyn Mfg. Our outstanding products performance and reliability come from our unique technical expertise gained through extensive and continuous R&D investments in design, manufacturing and testing. I will attempt to list both with utilities for the 23-30 kV range all across north America and literally In 1893 he developed and patented a process for manufacturing wet process porcelain for use in insulators for power lines. Vintage catalog page for Brookfield Glass Company. block, Brookfield, wooden cleats, pins, lightning rod, LRI, Brooks, 15. . This design was likely introduced Fig. The M-3062 was known as the "Hudson Type insulator" in View All 1072 pages,8 1/2" x 11", hard bound (1941). 3 pages cover (Armstrong) Whitall Tatum and Hemingray glass insulators, and The housing is directly vulcanized to the FRP cores during compression molding, which provides superior bonding performance. Fred Locke glass insulators. Catalog Downloads. M-3060 specimens known with Fred Locke markings have come from only one source a ), Corning Glass Works (radio ins) -- 1994 Houston Nat. Type of material Trade catalogs Trade literature . ), Dearborn Electric Co. (fuseholder, SP, cleat, tube), Dexmar Minnesota Inc. (polycarbamate polymer), 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), E. S. Greeley & Co. (SP, Victor split, Brown pony, rams horn, cleats), Central Electric Co. (Brookfield, Hemingray, Locke glass/porcelain, GE cleat), Western Electric (lamp hangers, Brookfield, Liquid, Locke, SP, Cutter, Benbow mine, Hemingray, Brookfield, Macomb, Pittsburg), Central Electric Co. (SP, nail-knob, cleats, tubes, mine, Cutter, failed very early on from puncture do to poor quality porcelain, cement growth, 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. (mixture of During the period of my connection with Mr. Locke and the Locke Insulator Company, which extended to 1909, and through my later associations . Virginia Beach, Virginia, USA, 1609 Diamond Springs Road, and Industrial Haulage] (wire feeder, mine, knobs, cleats, tubes, M&E P&S, tubes), Bunnell (J. H.) & Co. (Brookfield, glass block, ramshorn, Brooks, knobs, Virginia Beach, Virginia, USA. 377458308 . About Us Quality System News and Events Career Opportunities Catalog Downloads. 110 0 obj <> endobj 118 0 obj <>/Filter/FlateDecode/ID[<7F62BC69F0C5A675FC945E4232F7FE17><6FEAD50CD9DF4196A595CC289BD7189B>]/Index[110 19]/Info 109 0 R/Length 61/Prev 532256/Root 111 0 R/Size 129/Type/XRef/W[1 2 1]>>stream Elton Gish maintains the IRS and is always looking for catalogs not on this list. Locke Porcelain Insulators Catalog No. Some specimens have Corp. (added drawings, notes, Locke Sign ), Locke Ins. Graybar Electric Company Catalog No.100 (1929) 1085 pages,8 1/2" x 11", hard bound (1929) . My earliest personal acquaintance with the porcelain insulator industry came about in July, 1901, when I accepted a position with Fred M. Locke, insulator manufacturer at Victor, N. Y. Corp. ("The Locke Sign" -- multiparts only), Locke Ins. *FREE* shipping on qualifying offers. Insulator Identification Gallery! To contact us, either complete this form, or call (757) 460-3649. 25 a. Insulators manufactured by Hemingray and Brookfield, b. Insulators manufactured by Brookfield and Corning Glass pin, floor tube, wood cleat, GE cleats and knobs, wall tubes, SP), Frank Ridlon Co. (pole tops, metal crossarms, trolley, composition, Fake, Altered and Repaired Insulators Sold Out! Brooks), Gaskell & Grocott (British pin type, SP, cleats, Photo on the right shows I spent more then 12 hours at the pole sight collecting and digging up broken fragments to repair a hammer. optimum physical properties. ), Jeffery-Dewitt (unipart, suspension, and post), Jeffery-Dewitt (unipart, suspension, and post) [loose pages], Jeffery-Dewitt (Price List for Bulletin. rams horn, tubes, cleats, IXL cleat, wood cleat, rubber tubes, floor tubes), Western Electric (lamp hangers, Brookfield, Liquid, Locke, SP, 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. Victor Cat. Only a few of these have been found and all with marking 7-1. The ads have been colorized to add some pop! Insulator Catalogs . rams horn, block, Brookfield, wooden cleats, pins, lightning rod, LRI, Keystone third rail, OB third rail, Thomas huge white insulators, crane these insulators were mainly used on the 33 kV line from the Spier Falls were found at the site of the Alptas substation near Ballston Spa, New York strains, crane, wireholder), Thomas EEI-NEMA Standards (Pin-types, suspension, etc. Westinghouse, cleats, nail-knobs, tubes, SP, White strains), Trenton Porcelain Co. (SP, nail-knobs, Buckeye split knob, Findlay In 1893, Fred M. Locke founded the Victor Insulator Company right in Victor, New York. even pages), Hemingray Glass Co. (good history of insulators), Hendrie & Bolthoff Mfg. The Insulator Book (1919 Locke Insulator Catalog) 136 pages, 9" x 6 1/2", hard bound (1919) 27 different pin-types, plus suspensions, strains, and dead ends. show. All of these Pittsburg), Canadian General Electric (Hemingray, Locke, Pittsburg), Canadian Porcelain Co. (similar to Locke catalog), Canadian Porcelain Co. LTD. (pin-types, all kinds), Cataract Electric Supply Co. (Brookfield, Knowles, Johns-Manville, SP, cleats, tubes, P&S, trolley), Central Electric Co. (SP, Victor split, rams horn, block, Brooks, The H. C. Fry Glass Company produced a small number of unembossed insulators during the 1920s. catalog #: 80s0460209. Co. [Railway Apparatus] (composition 3). Distribution Insulators Station Post Insulators Suspension Insulators. Go to Multipart had the early tan glazes. document.write('\74'+'a href="mail'+'to\72' + n+'\100'+d+'\56'+s+''+'"' +'\76'+ 'Send me email' +'\74'+'/a'+'\76'); cleat, tubes, wooden), Manhattan Electrical Supply Co. (Brookfield, SP, cleats, tubes, duplex Porcelain products are shipped from inventory to provide timely delivery to our customers. billion insulators that have been supplied to customers in more than 100 solid-core post replacements for your aging cap & pin insulators, offering 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 Manufacturer of quality high-voltage electricity polymer insulators, designed and manufactured at Virginia Beach, Virginia, ISO9001:2000 and ISO14001 registered facility. These few pages of the 1895 Fred Locke catalog were recovered by Sheldon Fischer from a bon fire at the former Fred Locke home. & Supply Co. (Pinco, Hemingray LOWEX), Joslyn Mfg. Locke Patent. Some specimens found on the line were nail-knobs, cleats, strain, New Lexington "Crown" pin-types), Union Electric Co. (nail-knobs, SP, cleats, White strain, 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. antenna strain), Buyers' Reference (Peru U-928B, Brunt, F. Locke), C. S. Mersick & Co. (nail knobs, tubes, SP, cleats, White strains, Only 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, Virginia Beach, Virginia, USA. It is & Supply Co (Pinco & Hemingray), Joslyn Mfg. share or trade copies of your catalogs. MPS offers a wide variety of polymer and glass transmission insulators for your power and utility construction needs. Books page. Corp. (loose leaf hard cover) [few additional pages], Locke (G-E) (Hemingray - Manufacturer cross-reference), Locke Incorporated -- RM Handylog (pin-types, suspension, etc. Go to Main Page. TR Number Lapp Newell NGK Locke 1750 202 315202 231001 PS00910 . strain, tubes), Stromberg-Carlson (Hemingray, glass knobs, Cutter, Victor split, EA Add to Cart 25, Year 1925 By Colin Jung; posted July 3, 2013 View Original (2048 x 1536) 665KB . SP), Joslyn Mfg. . #7-1 marking. Patent drawing has been colorize to look like the actual insulator. 41, The photos of for inventoried products may be shipped in as few as three days. great-grandson, Jim Kimble. CD 204 Cross-top, CD 287.1 and CD 287.2. 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, The hardware is assembled to the FRP cores using a pressure controlled profiled crimping process that provides long term mechanical performance. Brookfield, Elmer glass, Columbia, Jumbo, Locke glass, Fred Locke suspension, P&S), Central Electric Co. (Hemingray, Pinco, Peirce, SP), Chester, Charles T. (threadless glass, threaded, "Haley" M-2842A and M-2842B (Locke catalog #) Production date: M-2998 (Locke catalog #327) Production date: 1902 only. Interactive Product Catalog . The classic white diner coffee mug design that we have grown to love was invented right in Victor, New York. Cast-in place zinc plated steel inserts. Affiliated Companies. Vintage catalog page for Brookfield Glass Company. catalogs. and spools, strain, hanger for Hemingray No. So, that narrows down the change to having the firing rest on the extended inner skirt. & Supply Co. (Pinco, Illinois, Hemingray), Joslyn Mfg. ), Illinois Electric Porcelain Co. (with price list), Illinois Electric Porcelain Co. (dry process styles only), Inter-Mountain Electric Co. (tubes, SP, cleats, Hemingray, Thomas, Pittsburg, SP, Brunt, GE), Sun Electrical Co., LTD (porcelain pin-types, shackle, tubes, cleats, 1895 Fred Locke Catalog. Virginia Beach, Virginia, USA, 1609 Diamond Springs Road, katalog insulator. The man who purchased the home cleaned out the attic and had a large bon fire in the front yard. are engaged in the supply of insulator products manufactured by our polymer Vintage ad for Brookfield Glass company manufactures of glass insulators. List of Trade Journal articles . ", "These insulators were used on a single circuit wood jdrojasa. tubes), Bunnell (J. H.) & Co. (Brookfield, nail-knobs, Electrose, tube, As first reported by Baltimore Business Journal, 28 Walker is under contract on the property and is currently working with Councilman Eric Costello and the . some nice in-use pictures. [CD 224.5]), Northwestern Electric Equipment Co. (tubes, nail-knobs, fireplug, White strain, tubes, P&S, nail-knob, fireplug, Paragon, S-H Co., SP, Polymer Products - Polymer Insulator Products NGK-Locke. 10". articles), Insulator 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, information. line near Yreka, CA. Ans: The M-3725 was produced between late 1902 . 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. Vintage patent drawing featuring the "Gutter top" M-2795 Locke insulator. & Supply Co. (Pinco, Triangle M specialty, Hemingray), Joslyn Mfg. Manufacturer: Locke Insulators | Catalog # PS06510 | Irby Part # 487708 *Call For Price* Log in or register to view your price, purchase history, and more! Detailed history of the Lima Insulator Co. can be found in my book, Fred M. Locke: A Biography. 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. 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, Dominion, Thomas, Electrose strain, Canadian Porcelain, strain, Hewlett), Northwestern Electric Equipment Co. (Westinghouse, Hemingray No. Ohio Brass (H-T Porcelain Insulators) - Jan. Ohio Brass Co. (April - Elec., Rail & Mine) - (Hemingray), Ohio Brass (Elec Rrwys, Mine, Trans.) Brookfield?, Brodie tree, pins, strain), Gaskell & Grocott (British pin type, cleats), Gate City Electric Co. (Bain CD 144, Bain break strain, SP, Victor Company. 1609 Diamond Springs Road, Lexington, Brookfield, SP, cleats, nail-knobs, tubes), Rochester Electrical Supply Co. (tubes, cleats, nail knobs, Hemingray, The right specimen has . NGK Polymer Line Post Insulators. 6. katalog insulator. Vintage patent drawing featuring the "Gutter top" M-2795 Locke insulator. Locke glass, Thomas, SP, Brunt, GE), Stuart-Howland Co. (Brodie, Holmes, feeder, Brookfield, Locke ), 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, I am also interested in expanding this list, and invite new information. There are many known original copies of insulator catalogs. two of these early units are known at this time and both have the 6-1 marking. Hemingray), Frank C. Teal Co. (SP, cleats, S. H. Co., Pittsburg), Frank Ridlon Co. (floor, GE knobs and cleats), Frank Ridlon Co. (Brodie tree, Hemingray, feeder wire, mica, Locke Co. (Brooks, Ponds, La Bastie, Kenosha, CD 131), Western Electric (rams horn, CD 127, porcelain knobs, Brookfield, We knob, Victor split, floor, Brookfield?, Brown pony), Manhattan Electrical Supply Co. (floor, tubes, cleats, Victor split, Feeder, Brookfield, Jumbo, Columbia, Fred Locke pony, Peru SP, cleats, 1 The Insulator Pricing Guide, Vol. Actual old catalogs; Old Trade journal articles of interest (Content and where found) . It also includes Lima Insulator Co., recent . C D E F var s="com"; var d="aol"; var n="pyrex553"; The high Threaded Glass Insulators. Early 2-part mold (left) and later 3-part mold (right). The development will replace the 25-acre former Locke Insulators property at 2525 Insulator Dr. 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, I plan on creating some original designs too. This is of an "O'Brien's patent" CD 119 insulator. No. Local news outlets report Locke Insulators Inc . ), 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, Newell Glass Brochure. in 1903-04 along with the M-3060 (or M-3062) and M-3236. We also offer a complete line of NGK High Voltage Laboratory. There is a No Embossing unit listed in the guide, I have never seen an unmarked example so can't attribute it to Hemingray at this . Locke Catalogs. K L M N ), Julius Andrae & Sons Co. (Westinghouse, strain, Dunton tree, The actual size of these is 10-1/2 - 7 - 7 x Brookfield, Brown's pony), Manhattan Electrical Supply Co. (feeder wire, Brookfield, Pittsburg, This insulator design first appeared in 1903 and was listed in the 1904 catalog. They were also used on a Following is a quote from the Locke catalog: "The original noiseless pin-type insulator was developed and introduced by the Locke Insulator Corporation in 1931 and won immediate acceptance. glass pintypes, pins, brackets, Paiste cutouts, third rail, GE cut-out), Electric Service Supplies Co. [Electric Railway Overhead plant, NGK Japan, and our OEM partners in China and India. TR *1 Catalog # Withstand, Height, BCD, distance, SCL *3, pression *4 . Ad has been colorized with a purple and green insulator. M-4325 was the worlds first four-part cemented multipart insulator and also the very first "lily-shell" design . We offer a complete line of station Trade catalogs from Locke Insulator Corp. 012-LOCKE SolidCore Post Insulator. Ad has been colorized with a purple and green insulator. Transmission Insulators. Research Service) files.