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V le c e l laneous PLAINTIFFS .EXHIBIT ! E- 17 3 } t ! ! ) I 1 i f i i ' RBB 00780 SC-ELEC-00700 A Heatproof Pendant Fixture Cord vHRV plant electrician knows of the troubles E experienced with ordinary rubber drop cord. Modern factory lighting practices call for high wattage gas filled lamps and these generate sur prisingly high socket temperatures. Even with lamps of comparatively low wattage, the high temperatures generated ruin the rubber insulation of ordinary drop cord and cause both mechanical and electrical trouble. Now the National Electrical Code requires heatresisting wire in all sockets and Rockbestos offers a wire for this purpose that is permanently in sulated with the basic heat-resisting material-- asbestos. The insulation on Rockbestos Fixture Wire is million year old asbestos, specially prepared and placed on the wire by the ROCKBESTOS 91-4 1st Avenue So. Seattle Process. Every fiber is saturated with flame proof and moisture resisting insulating cements and the resulting sheath is burnished down by pressure to form a firm, dense, permanently flex ible insulation which will not change or de teriorate in any wav. even under temperatures up to 400F. Rockbestos Fixture Wire can never grow hard and brittle as rubber wire does. Made in all wanted sizes, polarized for easy wir ing and furnished with a tough braided cotton jacket. Order direct or through your jobber. Specify "ROCKBESTOS Duplex Fixture Wire, black glazed cotton braid." Furnished also in triplex style. Glad to send samples and socket heating data, Loo. Please send the coupon to Rockbestos Products Corporation 360 Ninth St. San Francisco, Cal. ibO COLYTON StEIET Lod ANCELES ROCKBESTOS tde wire with permanent insulation ROCKEESTOS PRODUCTS CORPORATION 360 Ninth Street- Sin Francisco, Cal. Yes. send me a sample of yout drop cotd that can t deteriorate, also socket beating data. No obligation of course. s.'nrr>j> Title______ ComponyAddreiS-- Rcf>ro\t front Electrical JfYsi, Oct. 1st, RBB 00831 What makes Modern Fixtures Modern ? ^V^ODERN appearance is nor enough by any means. The inside must be modern, too. The modern trend in fixtures.'--higher wattages and better shading--was recognized by the Code in writing its new requirements that heat resisting wires snail be used - in all sockets. And this is only a matter of sound design. With mod ern high wattage lamps, socket temperatures regularly reach from 180 to 200 F. * and in pendant fixtures the entire wiring is exposed to what really amounts to a mild baking. No wonder that ordinary fixture wire shrivels, hardens, cracks and crumbles! Now if you're going to use a heat-resisting wire why not go "whole hog"--do the thing right--by using wire insulated with the basic heat-proof material--asbestos. Which leads us to our favorite story. When you handle ROCKBESTOS Fixture Wire you will see how supple, flexible and easy skinning it is--a fine pro duct. These qualities are permanent. After installation the wire will not grow hard or brittle, crack or crumble with heat or age. Asbestos is a mineral millions of years old in its present form and is not subject to the deterioration that takes place in animal or vegetable matter from which ordinary insulating materials are made. We simply prepare it. apply it to the wire and impreg nate it with special insulating compounds by the ROCKBESTOS Process. It is then, literally, "the permanent insulation". Let us send you generous samples and tell you about our new low prices. The coupon is handy but if you prefer to write address ROCKBESTOS Products Corporation, 329 Nicoll St., New Haven, Conn. `Test data substantiating this statement sent on reguest. Over 170f>0 Ca-r. Koiirund & (Jttnntfcn i ordered f&r Empire State Bniidinp. Branch offices:--Seattle--$an Francisco--Los Angeles ROCKBES TOS PRODUCTS CORPORATION 3 29 NicoM Street. New Haven, Conn. Your story interests me. Please send nte. without obligation, samples and prices on ROCKBESTOS Fixture Wire. Same__ -- 7"i`r/e--------Company^. Address----- Reprint from Electrical West for Morch, 1932. RBB 00832 . a.6 3 0 DESIGNED,ESPECIALLY A Unretouched photograph of several cable ends taken at fault points. These ends were within a few inches of the point of the arc, the temperature of which is estimated to have been 3000*0. Note condition of insulation. In 1882 Thomas A. Edison, "the father of electric light," struggled with the crude Kruesi tubes--ropewound copper rods in iron pipe--in the first low volt age "network" distribution system in history. But although improved electrical conductors were later put into use, the first cable designed especially for the single purpose of being used in low voltage distribution systems did not make its appearance until 1933--51 years later--and that was Rockbestos Secondary Network Cable. The insulation of Rockbestos Secondary Network Cable is unlike any other kind of wire insulation. It is pure asbestos, inorganic and inert--millions of years old in its present form. This is processed on to the conductor and impregnated with an inorganic insulat ing compound which has the same fireproof, non-toxic and non-explosive characteristics as asbestos. Power companies can now install cable in secondary network systems with full assurance that if faults do occur--no matter how severe--the cable will clear quickly and cleanly, without smoke, without fire, without giving off toxic or inflammable gases. Trouble crews go into manholes as soon as the fault has cleared. Manhole explosions are a thing of the past. Every engineer charged with the responsibility of proper and safe operation of networks owes it to him self and his company to thoroughly investigate this new cable. Many power companies already have, and eight are now making installations. We'd like to hear from you. ROCKBESTOS PRODUCTS CORPORATION NEW HAVEN, CONN. RcpnnleJ from the May 1934 issue of Electrical Engineering RBB 00838 That's what the silky but tough fibres shredded from heat proof, fireproof, age-resistant crude asbestos do for Rock bestos A.\ .C. wires and cables. They actually armor them against baking heat, oxidation, rotting fumes, oil, grease, and even flame, with insulation that is practically indestructible/ Tliis permanent insulation gives you cables that guarantee dependable operation of induced draft fans operating in high ambient temperatures over boilers--coal grinding mills, ex hausters, boiler feed pumps, forced draft fans, ash slush pumps--or any equipment that must function without failure even though it has to operate under severe conditions. For permanent installations that practically eliminate main tenance and replacement, use Rockbestos A.V.C. and All Asbestos wires and cables--in 600 to 5000 volt ratings--single or multi-conductor--plain, lead sheathed or armored. Send for a catalog. Rockbettas Product* Corp, 131 McoN Stmt, How Kma 4, Cow. ROCKBESTOS A.V.C. lie Wire with Permanent Insulation NEW YORK BUFFALO CLEVELAND CHICAGO PITTSBURGH ST. LOUIS LCS ANGELES SAN FRANCISCO SEATTLE PORTLAND* ORE. A PHMANBNT tOCKBISTOS CONSTRUCTION THAT ASSURES LONO-UVID SKRVICI The Rockbestos A.V.C. 600 Volt Power Cable illua* traced has individuals insulated exactly Like out single conductor Power and Motor Lead Cables (maximum operating temperatures 110*0.) minus the outer braid: 1 A tough impregnated asbestos yarn braid* resis tant to heat, feme, moisture* oil* grease and fumes. 2 Tape binds jute fillers (asbestos if required) and cabled assembly securely. 3 Heat* feme and moisture resistant impregnated felted asbestos insulation that won't dry out* crack or rot. Asbestos-protected varnished cambric for high dielectric strength and added moisture resistance. Inner wall of impregnated felted asbestos with stands conductor-beating overloads and won't bake brittle or bum. Conductors are perfectly and permanently cen tered in helically applied non-flowing insulation that provides greater current carrying capacity. One of 1SS differmi construction* designed for severs or unueual operating condition* by Rockbestos, RBB 00605Advertisement which appeared in the April iasue of Electrical Engineering and April 13 issue of Electrical World, 1946. THIS INSULATION will outlive children not yet born--and their children's children Father Time meets his match when you protect your hot-spot circuits with Rockbestos A.Y.C. wires and cables. Their permanent insulation of ageless, impregnated asbestos not only withstands the march-oftime. but the life-shortening destruction of baking heat, rotting fumes, oil, grease, and even flame, because it is practically inde structible. You'll find Rockbestos A.V.C. paying its way in theworst places-- where ambient temperatures run high (as over boilers)--where sulphurous fumes rot ordinary cables (as in coal-burning power plants)--and in other installations where you can't afford trouble such as power leads to exhausters, boiler feed and ash slush pumps, precipitators, and forced and induced draft fans. Solve your maintenance problems in advance! Save re-wiring time and cable costs by installing Rockbestos A.V.C. in your short life circuits. 600 to 3,000 volt ratings include lighting and switch board wires, lead sheathed or armored power and control cables and X. E. Code types. Write for a catalog. ROCKBESTOS PRODUCTS CORPORATION 314 Nk*ll Si., New Haven 4, Conn. ROCKBESTOS A.V.C. tOCKKSTOS A.V.C. M0 VOtT MOTOR LEU CUU TYPt AVA Insulated with impregnated asbestos And var nished cambric afid covered with asbestos braid, like single and three conductor power cable, this cable withstands high ambient and conductor temperatures in coi\ connections* motor and transformer leads. Also resistant to oil, grease, moisture and flame. Sizes lfl AWG to 1,000 MCM. tOCXRCTOS A.VX* m VOLT #T*0L tUli In one to 19 conductors with individuals in* sulated tike Motor Lead Cable, coded cotton braids, and asbestos braid overall unless lead sheath, armor, or lead and armor are preferred. For permanent installations under high temper* aVura and corrosive luxnes and elimination of fire hazard. Standard stranding* AWG 13-- 19/^25 and AWG 9--lD/#22. Others on order. Mb 125 different permanently inmlated wire* hare been developed by RoeiAeeto* to meet seeere operas tnjr condition*. The Wire with Permanent insulation NEW YORK. BUFFALO CLEVELAND PITTSBURGH DETROIT CHICAGO ST, LOUIS LOS ANGELES SAN FRANCISCO SEATTLE PORTLAND, ORE, RBB 00607 PERMANENTLY INSULATED TO RESIST HEAT FUMES - OIL - GREASE - MOISTURE - FLAME From the three basic designs illustrated Rockbestos has developed a complete line of 125 failure resisting wires, cables and cords, a few of which are described. All have the same performance guaranteeing characteristics de tailed below. Write for a catalog or samples. ftMfcbGftos Rermanartt Insulation Insuros Long-Lived Sorvke 1 A tough impregnated asbestos braid, resistant to heat, flame, moisture, oil, grease, alkalies and corrosive fumes. 2 Felted asbestos insulation impregnated with heat, flame and moisture resisting compounds will not dry out with age, burn, or bake brittle under high temperatures. 3 Lubricated varnished cambric for high dielectric strength and added moisture resistance -- protected from heat, flame and oxidation by felted asbestos walls. 4 Impregnated asbestos insulation that withstands heat of overloads and aging and won t become brittle, crack, rot or burn. 5 Conductors are perfectly centered in helically applied non-flowing insulation and will always remain so. ROCKBESTOS 300 VOLT HEAT REStSTmC FUTURE WIRE (Underwriters' Type AF) Stztt So. /*> to }-i .4 FTC ttranded plain copper conductor ininlotat ifith Mack or white impregneted /died aebeetoe-- With or \etlho,tt braid. Rockbestos asbestos insulated fixture wires, approved by the Underwriters' Laboratories for lighting fixture wiring, will not bake out under the high socket temperatures developed in modern high-wattage fixtures. Also used for `mall motor and apparatus leads, switch boards etc. ROCKBESTOS A.V.C. 600 VOLT BOILER ROOM WIRE `Electric*! Code, Type AVA) Sizee So. 13 toS A B"G iruuloied with varnithedcambric. mvregnatedfrlted aebeetoe and aebeetoe braid. Siue 6 to i/0 note another wall offelled aebeetoe next to the conductor. For lighting and control circuits exposed to heat and moisture, oil, grease, corrosive fumes or fire hazard around furnaces, ovens, lehrs, soaking pits, boilers, etc., this permanently insulated wire is ideal. It won't bake brittle, crack, rot, flow or swell. ROCKBESTOS Md VOLT NEAT RESIST** duplex flexible cord (Underwriters' Type AFPD) Slice So. 10 to 13 .-UrG tlrondrd plain copper conduetpn ineulated with impregnated /(tied aebevtoe. poianted. tvieted together and covered rilA a cotton 6raid. This heat-resisting cord is approved for use in lighting fixtures and is recommended for pendant types as it does not dry out or crack at the socket. Also on apparatus and appliances which develop heat in operation or ate used in hot, dry places. Twisted pair, tripled or triplex constructions also available. ROCKBESTOS A.V.C. 600 VOtT SWITCHBOARD WIRE ROCKBESTOS THERMOSTAT CONTROL WIRE . Njnioaai Electrifttl Code. Type AVBi Sizf Sr,. )\ to So. i " .4lf'G m'rt vanitked cambric and xmp'i'j'nitrd oeflctloe tneulation and prop, black, white or eO^Ori't flameproof braid. Combine fire insurance and fine appearance in your switchboards with flame and heat resist ant Rockbestos A.V.C. Switchboard Wire. Taken right angle bends without cracking because asbestos wall acts as a cushion beneath braid. Rockbestos A.V.C. Hinge and Switch board Hus cables have same characteristics. Sia* So. H, 10 and 23 A H'G in heo to fire conductor* with .013-.<f2 Y' or (for I t i toll irrticr) .Of/" of impreg nated felled aebeetoe insulation and tteel amor. A multi-conductor wire for fuel burner con trols, safety pilots, intercommunications and signal systems. Heatproof, fireproof insulation and steel armor give trouble-proof circuits. ROCKBESTOS A.V.C. 6tt VOLT FLEXIBLE CORO Siiei So, 10 to la AII G triiA (wo or three conductor* riwti* laird with impregnated felted atbeetoe, vomithed cambric, felted atbeetoe, catered wiM Aeflfy impregnated aebeetoe braid. A heavy duty, high-dielectric, heat and mois ture resistant flexible cord used in locomotive Cab circuits, high wattage lighting units, flood lights and for leads on apparatus exposed to heat. Specify polarised conductors if desired. For high temperature applications where re sistance to moisture is not required specify ROCKBESTOS A.V.C. ttt VOLT POWER CAKE (National Electrical Code, Type AVA) i:r< V... /> AII C to 3,OtX>,000 CM ineulated ttilk lamt- noifi '''itni abe!in. earnuhed cambne, and tubtaa* braid, (itft'r ->.tfiruetiont for ttnice OoltOQCS to 5000. Thi? cahle is recommended for power leads of hent-expo-ed equipment and circuits that run near boilers, steam lines, furnaces, kilns and other hot *pot$. It withstands high ambient and conductor temperatures and has ample moisture resistance. ROCKBESTOS A.V.C. BM VOLT MOTOR LIAO CABLE (National Electoral Code, Type AVA) Size So. 13 AIVG to CM ineulated vitk two walla of impregnated atbeelot and a htgk-dirlectric sarnieked tombne tneett, teilh a keaty aebeetoe braid ooerell. Use this apparatus cable for coil connections, motor and transformer leads exposed to over loads or high ambient temperatures. It makes a permanent installation as it is resistant to heat, flame, oil, grease and moisture. ROCKBESTOS ASBESTOS INSULATED MAGNET WIRE Round. eq/i'e and rectangular aebeetoe ineulated conductor* Jbtieked to meet carping winding condition* and toil treat ment requirement*. All-Asbestos insulated constructions. ROCKBESTOSAU-ASU5T0B60BV01T RHEOSTAT CABLE (National Electrical Code. Type AlAi Sue* .Vo. id A TUG to }.(*.*/J*>0 CM ineulated iritk a henry wall of felted aehtetot. toterrd wilk a rugged aebeetoe braid finiehed in black, white at colore. Use this cable for wiring rheostats, switch boards, elevator and locomotive control panels and equipment exposed to heat, fumes or fire hazard -- also for open power circuits in hot, Protect motors against heat-induced break dry locations. For flexible conductor specify downs with Class B windings of heat resisting Rockbestos All-Asbestos Flexible Apparatus magnet wire. Rockbestos A.V.C. Motor Lead Cable -- for solid conductor, Rockbestos All ROCKBESTOS A.VX. 600 VOLT CONTROL CABLE Cable completes the failure-proofing. Asbestos Rheostat Wire. In on- u, r> *>,/!union icitk individuate ineulatedlike Motor Lear/ t.'abte, cotton braid covered and cabled with an aebeefot brawl orff aii. standard lirandiupt AlVCr So. 13-^19/335 and ,\ o. '*-)'>/ f.'.1. Other etcandingv cm order. Designed for applications requiring a multi conductor control cable capable of withstand ing high temperatures, corrosive fumes, oil, grease and moisture. It also eliminates fire hazard as it wilt not bum. Used by equipment ROCKBESTOS PRODUCT5 CORPORATION 33# MICOU ST., HIW HAVEN 4, CONN. NEW YORK BUFFALO CLEVELAND DETROIT CHICAGO PITTSBURGH ST. LOUIS LOS ANGELES OAKLAND, CAL. manufacturers, power companies, steel mills. Advertisement in the April issue of Electrical Engineering, Electrical Weet, Electrical World. Factory Management & Alainlenance, Iron A- Steel Engineer, Poorer, 1948. RBB 00608 SELECTED COMPOUNDS in felted asbestos walls + quality varnished cambric tapes add up to ROCKBESTOS A.V.C (N.E.C. TYPE AVA) Compounds -- speciolly selected compounds -- which ore used to impregnate asbestos walls, are one of the important reasons why you can count on Roekbestos A.V.C. for dependable, long lasting service. Far this impregnation, Roekbestos engineers not only set up rigid compound specifications but conduct a con tinuing testing program to insure that these standards are always met. Thus, the exactly right compound is ap plied to the asbestos wail at the correct temperature and at the correct pressure. The Result ... the seamless, felled Roekbestos wall. In Roekbestos A.V.C. impregnated felted asbestos walls seal varnished cambric tapes away from air and moisture. The tapes are made to Roekbestos specifica tions and are applied under controlled methods assuring uniform dielectric strength. Roekbestos A.V.C. gives you long life and dependable service under every type of operating condition ... in temperatures up to 230F. Complete construction and test specifi cations of Roekbestos A.V.C. are in the new booklet "Specification RSS-88". Write today for your copy. ROCKBESTOS products corp NEW HAVEN 4, CONNECTICUT NEW YORK . CLEVELAND . DETROIT . CHICAGO PfTTSSURGH ST. LOUIS LOS ANOflSS NEW ORLEANS OAXLAND, CAUfORNIA . SEATTLE SSftrrtTueacOnjTdCtoeaKnrr*dIPqvoCoeJOoi,AogrSyl**pTrfoTrAOA.tVVaA.mCC..OtdAAiVaSnQrT*-, tbfrtatpnnchwiot.fficCeo* d writ* ft4dr*f Advertisement in the October issue of Electric Light < Power, Electrical Construction & Maintenance, Electrical Engineering, Electrified Industry, Iron & Steel Engineer, 1956; October 15 issue of Electrical World, 1956: November issue of Electrical West, Plant Engineering, 1956. RBB 00816 PRINTED IN U. *.A. 1 t\ RBB 00609 Beneath the Braid that Assures Long Cable Life Seamless Pelted Asbestos Walls + Impregnation with selected compounds + Quality Varnished Cambric Tapes N.E.C. Type AVA Wire and Cable may look alike on the surface. But a look under the braid will quickly show why the Rockbesfos A.V.C. gives longer lasting service. First, two dense, uniformly impregnated felted asbestos walls seal the varnished cambric tapes. They keep the dielectric strength high . . . give added strength against damage and flexing. Second, the varnished cambric tapes are made to our own exacting specifications which incorporate standards beyond those called for by industry. Add to this, thirty years of know-how in the application of asbestos and VC Tapes to Rockbeitos A.V.C. and you get wires and cables that eliminate costly rewiring jobs and expensive maintenance ... assure long cable life. Write for the new booklet "Specification RSS 88" which gives complete construction and test specifications. ROCKBESTOS PRODUCTS CORPORATION NEW HAVEN 4, CONNECTICUT NtW YORK * CLEVELAND DETtOtT . CHICAGO - KTTttUltOH * St. LOUtt LOS ANGELES NEW OftUANS OAKLAND. CAUAOtNU * SEATTLE STOCKED COAST TO COAST Isekbttfoi A.V.C. can* (MIC. lyp AVA, AVI, fcj r* fttlobU for bwMdfofo ihipaaw. Cal or vrtfo MaraT branch Advertisement in the March issue of Electrical Construction <Jt Maintenance, Electrified Industry, 195"; I o1I RBB 00815 COMBINATION Beneath the Braid that Assures Long Cable Lif< Seamless Felted Asbestos Wafts + Impregnation with selected compounds f Quality Varnished Cambric Tapes N.E.C. Type AVA Wire end Coble may look dike on the surface. But a look under the braid will quickly show why the Rockbestos A.V.C. gives longer lasting service. First, two dense, uniformly impregnated felted asbestos walls seal the varnished cambric tapes. They keep the dielectric strength high . . . give added strength against damage and flexing. Second, the varnished cambric tapes are made to our own exacting specifications which incorporate standards beyond those called for by industry. Add to this, thirty years of know-how in the application of asbestos and VC Topes to Rockbestos A.V.C. and you get wires and cables that eliminate costly rewiring jobs and expensive maintenance . . . assure long cable life. Write for the new booklet "Specification RSS 88" which gives complete construction and test specifications. ROCKBESTOS PRODUCTS CORPORATION NEW H AV EN 4, CONNECTICUT NEW YORK * CLEVELAND * DETROIT CHICAGO PITTSBURGH * ST. LOUIS. LOS ANGELES NEW ORLEANS OAKLAND, CALIFORNIA * SEATTLE STOCKED COAST TO COAST 5*on4rd RocfcbHW A.V.C. ton* nwettaft {NiC. ryp* AVA, AVB. tL] gr evgioblg for iMpnwl. Cal or writ* Maratl branch affica. Advertisement in the March issue of Electrical Construction < Maintenance, Electrified Industry, 1957; March 4 issue of Electrical World, 1957. PRINTED IN U. . A. This is One foot of i oa Over 10 million feet of this 600 VOLT Control Cable is already in use in hundreds of utilities, steel mills, oil refineries and industrial plants. Rockbestos PNR is the ideal control cable for many coai preparation plant operations. Get all the details on PNR -- write now for the new, free catalog. ROCKBESTOS PNR FEATURES INCLUDE: 46% smaller in area ,,, 23% smaller in diameter . . . than conventional control coble, Uie smaller conduit and fittings or put more conductors in existing conduit. Lighter, easier to handle, store, ship, pull through conduit. Dielectric breakdown. . . . over 40 times operating voltage. Rated 600 volts . . . conductor operating temperature 167F, Flexible from 1 67 to "*676F. No crocking ! WRITE TODAY FOR COMPLETE DETAILS ON ROCKMSTOS PNR, ROCKBESTOS PRODUCTS CORP. NEW HAVEN 4f CONNECTICUT ap polyerhyl**#, N -- nylon, R -- fiotkhide (PVC) nlw yoRK * Cleveland * Detroit ST, LOUIS * lO$ ANGELES NEW ORLEANS Chicago OAKLAND. CALIFORNIA SEATTLE Pittsburgh RBB 00814 Advertisement in the April issue o: Coal Age> ]Uo7. POINTED IN U. S. A. i- \ Dl~) depend on performance-proven v-V" in burning motors for heavy-duty coal mining machinery, leading motor manufacturers de* pend on performance - proven Rockbestos A.V.C. Motor Lead Cable. for example, in building motors for use in Joy Manufacturing Company's 208U-) high ca pacity loader, the manufacturer specified and used Rockbesfos Motor Lead Cable. This coble not only withstands oil ond grease but also gives protection against starting overfoods, high ambient temperatures and the many other operating tortures of heavy-duty mining equipment k ir, h-. 1 ?V- u i; This Rockbestos A.V.C. Motor Lead Cable has also been performonce*proven in mill motors ond other heavy-duty stationary and traction- type motors. You, loo, con get trouble-free wire performonce by specifying ond using Rockbestos A.V.C. Motor Lead ond Apparatus Cable. Remember, it'll keep its flexibility indefinitely won't rot or bloom when exposed to grease -- won t burn or corry flame. Write today for full details -- ask for Specifi cations RSS-98 ROCKBESTOS PRODUCTS CORPORATION NEW HAVEN 4, CONNECTICUT NEW YORK, CLEVELAND, DETROIT, CHICAGO, PITTSBURGH, ST. LOUIS, LOS ANGELES. ATLANTA. DALLAS, OAKLAND, SEATTLE RBB 00807 AdvertiytnienL in the May issue of Eleclricol Manufacturiup, 195' printco in u, s. a. I O 5L3 ROCKBESTOS Can Fill Your Wire and Cable Needs from its Chicago Warehouse These quality Rockbestos wires and cables are regu larly stocked for your needs at Rockbestos' Chicago warehouse. For complete details on these and other Rockbestos wires and cables visit us at Booth 212 at the Electrical Industry Show. ROCKBESTOS PRODUCTS CORPORATION NEW HAVEN 4, CONNECTICUT new york * Cleveland * DETRorx Chicago pnrjiusCK st. louis iOS ANGELEJ * OAKLAND ATLANTA . DALLAS . SEATTLE lockbiitos A V C (N.E.C. Type AVA) Power Coble ftotkbettof Varnished Cambric power 6abie Rockbestos A V C (N.LC Type AYB} Switchboard wire Solid or Stranded Rockbestos N.E,C. Type TA Switchboard and flexible hinge coble -- solid, stranded and flexible stranded Rockbestos RNt 600 volt small diameter control cable Rockbestos N.C.C. Type A1A Rheostot wire RBB 00805 Rockbestos NE.C. Type AA Motion picture coble Advertijie/iM'Jii in the May i: TM Chicago Eit-clrical 3 *J5 7. 'fibNTEt :n S * I 0 3> Performance- Proven that's the Success Story of ROCKBESTOS A.V.C. Motor Lead Cable standard equipment for heavyduty mining machinery motors. Today hundreds and hundreds of motors in heavy-duty mine machinery give continuous trouble-free performance, thanks to Rockbestos A.V.C Motor Lead Coble. This Rockbestos cable was designed for use where oil and grease resistance is important, where protection against high ambient temperatures, starting overloads and other operating tortures is of prime importance. And Roekbestos A.V.C Motor Lead Cable is standard equipment in motors used by leading mining machinery manufacturers such as Goodman, Jeffery, and Joy. Be sure to get this quality cable -- specify Cable ML, Rockbestos A.V.C. ROCKBESTOS PRODUCTS CQRP. * NEW HAVEN 4, CONN. MEW TOW, CLEVELAND, CHICAGO. rrTTSSUItGH, LOS ANGELES. DfiaOJT, ST. LOUIS, NEW ORLEANS, OAKLAND. SfAtTlf Ad* ernsemenr in rhe Aprjf -svue of Cf<ai Aft. 19^3- RBB 00791 tO Another famous plane PROVEN IN SERVICE 1923 two DeHovillond DH-4BA4't OChigvg Tint mp-gsr jefgclin^ Wtfh me gid cl tug mid.o>' reive&Bfl. WC Amy pfioTj Hffr*d aloli lowf ggyt ever Sen Diego, CelilorJiw. Thirty-five years ego. mid-sir refueling was front-page news -- today it is a commonplace occurrence, typical of the tremendous strides made by the aviation industry. And keeping pace with aviation's growth, Rockbestos high tem perature wire and cable has earned a proven-in-service reputation. Today many Rockbestos Aviation wires, produced TO the continu ally high standards of the aviation industry, are integral parts of the nation's aircraft and missiles. ROCKBESTOS HEAT20NE AIRCRAFT WIRE Typical of the many Rockbestos Aviation Wires which cover a temperature range from 257*F to 750*F is this RockbestOS HATZONEiJ -- a 400*F wire for power, control and communication circuits made in accordance with MIL-W-7139A. It is ideal for general pur pose aircraft wiring because it has excellent resistance to flame, moisture, gasoline, fungus, alcohol, grease, oil and hydraulic fluids, it has high dielectric strength and ex cellent flexibility at low temperatures (-- 55"C>. it is especially recommended for high im pedance circuits. for compile ip^cifitohonj on Hgeltonr and Other RodbeitOJ oviohon wires, wriie tor coioioj 56a. if you have a special reavirement. please send us your specifications ROCKBESTOS PRODUCTS CORPORATION NEW HAVEN A, CON NECTI CUT MEW YORJt Cleveland Chicago * Oakland - 10s angers SE TT EPITTSBURGH - $1. LOUIS * DETROIT a i ATLANTA PALLAS Ad^t-rmeroeni in the April 2b issue of Aviation Uytd. 1958 - 1 VC RBB 00786 Ik u. t t oiF Steel Mill ond Foundry "hot spots" provide one of in* duitry'j worst torture chambers for wire and coble. Heat, overload* and corrosive fumes combine to kiN ordinary cable quickly. Don't take a chance on ordinary cable for troublesome "hot spot'1 applications- Specify ond use Rockbestos A.V.C. This supe rior AVA co ble, with asbestos, va rnished cambric insulation, takes temperatures up to 230Fr assuring con tinuous operation in hot spot applications, provides greater current carrying capacity for increased and new loads. When you specify and bay Rockbestos A.V.C., you reduce your electrical maintenance and construction costs . . . you get years more dependable service. Write now for the new Rockbestos R55-88 to help you specify and buy Rockbestos A.V.C. ROCKBESTOS PRODUCTS CORPORATION NEW HAVEN A, CONNECTICUT NfW YORK CLEVELAND DETROIT - CHICAGO OAKLAND PITTSBURGH - ST. LOUIS LOS ANGElES * SEATTLE > ATLANTA DALLAS ROCKBESTOS THE SUPERIOR A RBB 00788 Advertisement ir the April issue of utal & A'.^imenanct. E.t<ir:cal IT'tsi. Jtt. $tttt Ersgtntef. lf.1,vN. May issue of E/tc:ru^ r.ngifitenni Cf-"-r Brpnrrrmg. 19V: May j 2 issue of Elenttm! World. June issut- r,f fcitartr Light 6 Puv u Enctneef Soi/ti. ]<>}> IlfeTft I* \ o3> cj .ttVdr*. INTERLOCKED ARMORED CABLE For Power Distribution in New Plants or in Modernizing Old Plants For more current capacity than coble in conduit or other armored cable, specify and buy RocJrbesfos A, V.C. . .. for easy installation on racks or hangers beneath the ceiling or next to walls, specify and buy Rockbestos A. V.C. . . . ... To eliminate costly conduits and ducts ... to save important dollars on materials and installation time, to permit quick, easy repairs, specify and buy Rockbestos A. VX. ,., All interlocked armored cables ore not alike ... and, for maximum dollar-savings and maximum performance be sure to specify and buy Rockbestos A. V.C. Interlocked Armored Coble -- the superior AVA Cable. Write now for the new Rockbestos manual which gives the application and design date to help you specify and buy Rockbestos A. V.C. KOCKfttSTOS PRODUCTS CORPORATION, NEW HAVEN A, CONNECTICUT NEW YORK * CLEVELAND DETROIT * CHICAGO * OAKLAND * PITTSBURGH ST. LOUIS LOS ANGELES SEATTLE * ATLANTA DAUAS ROCKBESTOS A.V.C THE SUPERIOR A.VA. CABLE _ Hluu;jilllLllllLili;iLiii..uf.imiiLmlaiuLi..ui:iilumiuiiimmmuuimilumii[;1mnuililllllllKi..u;a[|iii||Hlllii;M rcstmrnr ;n the April issue 01 'V -ant .-< r & Pouir. F..r.:r:cjJ Eng:ntti;t:;. Pittn: Engtntotitf Mai issue of E-s:;r/ea/ MuiKitnjncf. Eitftncai y>.-j Jur.L ijsue of Quasipts Ct-ni'dUut' 19^8, Au^um i^uc of L-t<,srt(ei South RBB 00787 1` ^8. Apr;! 2S issue of I.imrtcaf U "*r,v. 1958: hia'wtry. Iron i,vr* Engtmet wTt r i- ^ s ROCKBESTOS -the asbestos covered wire Here it is--the extra flexible fockbestos Motion Picture Qable You will find it oh all the leading projectors, ..... arc-- lights--sun--arcs,--high- intensity- lamps u --wherever heat is. '' * "jYYou'.cab tie it in knotsl And it will not,crack, rior break and the surface re- mains intact--practically forever. ^YYNothihg? bettet|can be used for wiring jihj from panel ..boards* to rheostats--just try : it. - Would you like a piece to tie in a Y.Y knot?. lWe'11 send it. Just a card will Y;.'bringJt.'j7`. - ' When you buy M. P. Cable ask for Rockbestos --the extra flexible. ROCKBESTOS PRODUCTS CORPORAT I O N RBB 5S42 Grand Central Term. Btdg. New Torlc NEW HAVEN, CONN. 224 Madison Term. Bldg.. Chicago . The wise heater cord buyer knows -- What gives Flexibility in Heater Cord He knows for example that it is possible to buy a ROCKBESTOS No. 18 16/30 heater cord, that is more flexible than some No. 18 cords with a 41/34 conductor. Why is this true? The answer is that everything wound, spun or braided over the wire affects the flexibility of the flnished cord. Eight factors are involved and stranding is only one of them. They are the softness of the copper, the stranding, the lay, the cotton serving, the quality ofthe rubber, the asbestos covering,the twinning and the outer braid. Flexible, long wearing heater cord is the result of constant experimental work with each of these factors, while holding the others constant, to determine the most efficient condition of each. We wish the solution of making a very flexible cord was simply the use of a very flexible conductor, but unfortunately it isn't. We know ofno substitute for constant experimental work, fine materials and careful supervision. This is the formula we have followed for years and today the position of ROCKBESTOS in the heater cord fieid bears out the statement that ROCKBESTOS HEATER CORD represents the highest point of de velopment in heater cord construction. 6942 fiud CtRtnl Ttfm, ROCKBESTOS PRODUCTS CORPORATION NEW HAVEN, CONN. N*w Tift 903 Clift Bid*., Pltttfeurjh, Pi. 71$ MttfiW* Itfm. 2143 Raltwiy Excfe. St. Hull, Ml, On tht Padffc C#i*t---Ameantfl Win 4 Call! Cl ROCKBESTOS - the wire with permanent insulation Chkcagi RBB 00826 Heater Cord means We hear a lot about balance--in golf clubs, gasoline, automobiles and whatnot. We presume balance really is necessary in these things. We know it is necessary in heater cord, and it has taken time for us to accomplish the proper balance in heater cord. Time to standardize on the right size of the copper strands. Time for ex periment to settle on just the right lay of the stranded conductors. Lay is the twist--it must be just right, not too tight, not too loose. The cotton serving operation must be studied. The rubber requires much experimental work. Then the asbestos wrapping of the rubberized wires; after that the matter of lay again as the asbestos wrapped wires are twisted together. Can't be too loose; mustn't be too tight. And then the braid. That's all you see of heater cord. Years of exper imental work on braiding has been done by Rockbestos. Each of the factors mentioned must be just right to produce the proper balance. Balance produces flexibility, long wear and protection. You may be interested to know that altho the Underwriters Laboratories Inc. test calls for 1,000 test cycles--all Rockbestos Heater Cord consis tently exceeds this requirement. In a way this is a tribute to the careful experimental work we have done for years to produce a balanced heater cord. ROCKBESTOS PRODUCTS CORPORATION * NI COLL STREET NEW HAVEN, CONN. S942 Grand Ctfitnt Tan*. |ld., Kw Tort 903 Clara Sid?.. Pa. 718 Midlull Tarm. Sidy.. Clileiyi 2143 Railway Eidi. lid).. St. Uala. Md. 0a th# Pacific Coat--anaconda Win a Cilia Ca. ROCKBESTOS - the wire with permanent insulation IN SWITCHBOARD WIRING The fine appearance on this boaid is no acci dent. The skill of the electricians contributed part; ROCKBESTOS Switchboard Wire and Hinge Wire contributed the balance. Unusually sharp bends can be made without cracking. This is possible with no other type of switchboard wire. With ROCKBESTOS Switchboard Wire the bends do not have to be favored. They can be as sharp as you like and no cracking or even opening of the braid will result to spoil that fine appearance. The novel construction of the insulation of ROCKBESTOS Switchboard Wire, original with. ROCKBESTOS, is responsible. The same construction, but on flexible stranding, is used in ROCKBESTOS. Hinge Wire for swinging panels. You will quickly see why these wires are being used by the largest utilities when you examine samples which we will be glad to supply if you will fill in and return the coupon. ROCKBESTOS PRODUCTS CO RPORATION 407 NlCOLC STREET NEW HAVEN. CONN. 5342 Grind C*n|4 Term. Bldg., Now Tort 903 Clark Bldg*. Pittsburgh. Pa. 718M*diton Torn. 8ldg,, Chicago 2143 Railway Caching* Bldg*, St. Loais, Mo. On th Pacific Coast--Anaconda Wlro and Cafal* Co* ROCKBESTOS --the wire with permanent insulation RBB 00822 A HANDY WIRE cJ*J With Many Uses - FOR FIXTURE MANUFACTURERS: Rockbestos insulated fixture wire was first designed for fixtures employing high wattage, gas filled lamps which generated surprisingly high socket temperatures and where, therefore, ordinary insulated wires could not be used because of Code restric tions,1' Naturally engineers who make a logical choice are selecting the wire insulated with the basic heat resisting material--asbestos. ^Article J4. section 1402-d of 1930 National Electrical Code reads in part as follows: "Approved fixture wire .... shall be employed, unless wiring is exposed to temperatures ia exeest of 120*F (49*0 in which case conductors having .... beat resisting covering shall be used." FOR APPLIANCE MANUFACTURERS: Appliance makers soon discovered that Rockbestos fixture wire solved a persistent trouble they were hiving with the connections to the top heating units of waffle irons, through the hinge section. Here the wire must stand exceedingly high temperatures without deterioration, else the iron will give trouble. Rockbestos fixture wire is standard with most appliance manufacturers. IN BUILDING AND REPAIRING MOTORS: A number of manufacturers and motor repair shops handling small motors have found that coil leads of Rockbestos fixture wire are un affected by temperatures encountered in the baking operation. IN SUBSTATIONS: Engineers are finding Rock bestos fixture wire very handy for use in miscellaneous low volt age circuits such as secondary wiring of voltage regulators, end bracket panel connections and other places where a flexible, fire proof and mechanically strong insulated wire is necessary. The wire can be supplied with color coded braids for engineers who want to systematize their wiring. Any Rockbestos insulated wire is strong mechanically. Its insulation is dense yet flexible and will always stay so. It cannot age, even under attack of severe conditions. Asbestos has lain in the earth for millions of years and during this time has met heat, moisture, oil and earth acids yet has not changed or deteriorated. Perhaps you have occasion to require some of this material. Write, telling us of the use you have in mind. We will gladly send samples and usable suggestions. Please address: In Seattle 914 1st Av. So. ROCKBESTOS PRODUCTS CORPORATION 3 60 Ninth Street San Francisco In Los Angeles 430 Colyton St. Please send me a sample of ROCKBESTOS Fixture Wire for................................. and a copy of your Fixture Wire Bulletin No. J 0. Name....................................................................................... Title........................................ Company ....................................................................................... ........................................... Address ......................................................... City................................... State................... ROCKBESTOS--the wire with permanent insulation RBB 00828 RBB 00782