GE Photographic Lamp Catalog 1954

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    L A M P D I V I S I O N

    GENERAL . ELECTR IC

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    G E N E R A L E L E C T R IC[})C00lJ0@~~[PCO D@[billQJ [;>0

    complete line of General Electric

    lamps for all photographic purposes

    w i th illu stra tio nsl des cr i p tion s,

    applications and technical data.

    L A M P D IV IS IO N

    GENERALe ELECTR IC

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    FOREWORD I

    2

    A substantial part of the great progress made in theart olf photography has been contributed by new andimproved Iight sources - lamps for picture taki n g,picture processin g, pictu re production, reproducti on,picture viewing and projection.Each of the many lamps used in photography

    is designed to do one specialized job. A photoflashlamp must deliver a great quantity of light during theexect.spllt second that a camera shutteris open;a projection lamp must pour a, maximum amount of lightthrough a very tiny opening in order to projectthe brightest possible image on the screen; aphotollood lemp must deliver ligkt of exactly the rightcolor in maximum amounts with minimum currentconsumption. Many different types of lamps are neededto meet different requirements and there mustbe a variety of sizes to accommodate a range of needs,To fill the many special needs for lamps in photographyin the best possible way requires experience, skill andextensive resources. General Electric leadership inthe development of better Iight sources forphotography has continued since Edison'sfirs~ lampopened the way to today's achievements.The lamps shown in th.is catalog include only those

    types and sizes in greatest general demand andthose required for newer types of equipment or designedto replace older types of lamps. Information onlamps not listed may be obtained from any of theGeneral Electric Lamp Division OFFices listed on theback cover.

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    GENERAL . ELECTR IC

    ENTSABLE OF

    PageHighest Quality Assured for G . E .'s Complete Line of Photographic LampsThe G-E Photoflash LampPhotoflash L am ps fO Tshutters having X or F SynchronizationPhotoflash Lam ps for shutters havin 9 IIM" SynchronizationPhotoflash Lam ps for F P type shutters and for Open Flash .B lue Photoflash Lam psRepeating Flash TubesPhotoflood Lamps .Reflector Photoflood Lam psAdvanced Design of G-E Projection L am psRecommended line of G -E Projection LampsProjection Lam ps for Slides and M oviesE xc ite r L am ps for S ou nd R ep ro du ctio nFilm View ing and Editing LampsPhotographic Enlarger Lam psPhotocolor Lam ps fo r C olo r V ie win gDark Room Lamps

    4-56789101112131415

    16-171818191920

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    RESEARCH,DESIGN, MANUFACTURE ASTANDARD OF PERFORMANCE FRO

    ..------- TESTING~ Step by step as G E Lamps are built each opera-

    tion is m easured, tested, controlled to m ake su re- t.hat every lam p is up to ex acting stan dards. lndepend-ent testing agencies assure a double check on ourow n testing and inspection . A definite number off.inis.hed lam ps are ta k en from producti on at reg u l arinlervals daily and thoroughly tested.

    HANDWORKM anufacturing is a complex operation requiting

    painstak ing handwork al m any steps. The com-billed skill and experience of G E trainedoperators is reflected in the precise uniform ity w ithwhich GE Photolamps perform in a w ide V arietyof epplications.

    The integratin g light m eter shown here m easu resthe amount of light em itted during a flashtube flash.It is the only type of equipm ent so far devised fo raccurately determ ining the ligh t d istribution fromflashtube.reflector com binations. These data in turnprovide the basis for compiHng exposure tables.

    MACHINESMachines for lampmaking are designed and built

    by G eneral Elecldc. Better m achines m ean betterlamps at low er cost. M achine developm en t is aconstant andessenlial pari o f the whole G -Elam pm aking operatio n. I n the whole history ofm achine developm ent m any G .E firsts ate nowstandard for the industry.

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    ESTING FACILITIES ASSURE HIGHESTENERAL ELECTRIC PHOTOLAMPS

    INSPECTIONInspection of projection lamps for source dimen-

    sions, axial alignment, and light center length.All General Electric projection lamps are care-fully inspected on equipment similar to this one tomake sure that the filament is properly positionedto insure the highest efficiency in optical systems.

    DESIGNThis group of laboratory equi.pment was assembledto provide camera manufacturers with much-needed

    answers to many questions regarding the design ofsynchron izers bui It into camera shutters. As withvirtually all such investigations, the object is toachieve photographic equipment designs which areof maximum reliability, convenience, and economyto the ultimate user.

    SINTERINGHigh efficiency, precisely formed tungsten fila-

    ments are sintered under closely controlled con-ditions of temperature and time to insure goodfilament performance with a minimum of deformation.

    O PT IC AL SY ST EMExam ining a lamp and a test optical system in

    General Electric's Optical Bar. As a result of suchcooperative studies portable movie and slide pro-jectors today deliver the maximum amount of lightto the screen.

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    THE PHOTOFLASH LAM.OXYGENPHOTOFLASH

    LAMP PARTSLACQUER

    fiLAMENT

    LEAD.IN W IRES

    EXHAUST TUBE

    W h y G E P h o t o f l a s h L a m p s N o w A r e " w i c e a s F l a s h a b l eTHE parts of the photoflash lamp

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    F O R S H U T T E R S H A V I N G n x " o r U F " S Y N C H R O N I Z A T IO NShutters of these types are situated at or in the camera lens. Class "F"svnchroniz ers close the sw itch contacts. to flash the lamp up to about5 m illiseconds before the shutter is fully open.W ith class "X" syn-chronization, the sw itch contacts close alm ost immediately after theshutter is fully open. For either type of shutter synchronization and ex-posure times no faster than 1/50 second the photoflash lamp shouldproduce its light w ithin about 25 m iiliseconds after the sw itch doses.0.8

    ~\\,~ ~

    _/ ' " , -

    0.7Zw 0. 6~:J 0. 5--' 0.4ow 0.3: : i :'" "

    0.2J::e 0. 1: : : : ;

    0

    I'

    r \ .v ~

    PH/M2

    o 5 10 15 20 25 30TIME-M llliSECON OS

    T he new est, smallest, most econom ical, mostconvenient, and revolutionary photoflash lampyet produced. Designed prim arily for use w ithsim ple cam eras, for which new , smaller, moreefficient, and more convenient Hash equipmentis just becom ing available. W ith a socket adapter,m ay also be used in present larger reflectorsdesigned for m idget lamps such as the SM foradded convenience and economy.

    5 10 15 20 25 30T IM E M I L LI S EC O N OSHjSM

    T he original photoflash lam p for sim ple cameras,Has shortest flash duration of all photoflash lam ps- stops action about as effectively as a 1/200th-second shutter setting. Most nearly perfect colorquality for all indoor (tungsten type) color film s.CLASS "XU and "Fu PHOTOFLASH LAMPS

    Max. APp,ox'l Appro>. ApP1o ... ApPl"Ox.Bulb Over- lumen. Peak RecomNumbe, Bulb 8ast Volts Dia~ .1 1 C.lton Ce Seconds Lumens lime to Mean mendedInches length, aty. aty. Peak in . Colo, Type FilmInche. in thou nd. Second. Temp.PH/M2 j B 6 I Min. Bav. I 3 I % I Hi I 12 1 120 I 4.21 550 I .015 I 44000K I AnvPH/SM without pinsBl1 S. C. Bay. 3 1% 2% 12 120 4.8 810 .005 33000K Any

    NEW PACKAGES SAVE TIME AND SPACEThe popular 12-84 lamppackaging technique now em-

    ployed by General E lectric for all m idget type lamps isalso used in packaging M2 lamps. The 12 lamp cartons of3 four-lamp packs are packed 10 cartons to a case. Thecase of 120 M2 lamps is 9" x 7}" X 3 Y 2 ! 1 or about thesize of a shoe box. Four cases of M2 lamps occupy aboutthe sam e space as one case of m idget lamps.

    The photo shows relative sizes of cartons and cases of M 2lamps, PH /8 lamps and PH Is lamps.

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    G -E 7Jk ,F O R S H U T T E R S H A V IN G n M "

    Shutters o.f th is type sre also situated at or in the cam eralens. The Class" M " synchronizers of such shutters causethe sw itch contacts to close about 15 m illiseco nd s befo re

    N o. 8 - The sm allest of theG E Lamps w ith this tim ing char-acteristic. Prod u ces .5 Iig h tl y m oreconcentrated beam than No. 5 inm any m idget reflectors. W ith faslfilm and ave ra gesh utter speeds Jadequate light for m ost picture-taking situations. Flash on Iy frombatteries or o ther sources of lowvoltage.No. S - This is an excellen tlamp for all around picture tak-ing . It is the most popular andmost w idely used of all G -E Photo-

    flash l.am ps. Has precise uniformflash, ideal for synchronized use.The preferred type for new spaper,candid and advanced am ateur use.Requires a filter at the cam era lensfor best resu lts w ith indoor colorfilm s. For low voltage flash ing only,No. 11 - The smallest of theG -E Lamps for use in flash equip-m en! having m edium screw sockets.W henever possible it is more eco-nom ical and more convenient touse an appropriate medium -to-

    the shutter is fully open. A ll G -E Lamps for such equip-ment have the same average tim e 10 peak of flash as shownby the timel.igh t curves and tabulated data below .

    PHIS1 T1H/11

    bayonet socket adapter and to sub-stitute the No.5. For low voltageH ash in g o nly.

    PH/22No, 22 - For professional use- adequate light for most indoorcolor pictures or for extra coverageor h igh speed shots on black-and-

    w h il .e f ilms .

    I\I I f , P I- -2

    0 J 1 \ P H 1 1I ~~ ~ . P -1-5II I ~ K _ . . . P H BrAi l ~ "vI(~ ~rI ~ ~ "'- t ' - - .

    Z 4.0; 3. 5::I 3.0~ 2.3w 2.l:..:. 1.5::t:o 1.0....I 0.5

    o S 10 15 zo 15 30 3S 40 45 50 35 60TIM E M I LliSECON OS

    CLASS "M" PHOTOFLASH LAMPSMIII; IC, I Appro., I Appro Appro>, Approx,I ;Bulb Over- Lumens Peek RecomNumb ..r Bulb Ba Volts l O l a . .11 C.rlo~ C Seconds Lumens Tim, to Mun mendedInches Len,lh, Qly. Oty, Peak In Colo. Tvpe FilmInches ln thou nd. Second. Temp.

    PH/a

    IBT-B

    IS. C . Bay, 3 1 2 r \ - 12 120 8 900 ,0110 38000K Any

    I PHis Bll' S . C. Bay. 3 1% 2% 12 120 16 1200 .020 3800"K AnyPH/l1 A-15 Medium 3 1% 4 8 120 30 1800 .020 3BOOoK AnyPH/22 A-19 Medium 3-125 2% 4% 6 120 63 4000 .020 3aOo"K Any

    8

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    PH/6

    "FP" stands for "focal plane"and describes the type of shutterthat is located at the film (focal)plane of certain cameras. For syn-chronized flash photography withsuch shutters it is necessary to uselamps having a special and longerflash duration of the type illus-trated here. For pictures by the"open flash" method any photo-flash lamp appropriate to thereflector equipment can be used.

    ; ~ 1 1 t t m f l 1 10 20 30 40 50 60 70 80 90 100TIME.MlLlSECONDSIZw 5.0:!:::. 4.5I . : > ~.Ow~ 3.5. . : .: z : : 3.0o_. 2.52.01.51 .00.50PH/31

    No.6 - For high shutter speed synchronization with the majorityof smaller focal plane shutters for most cameras up to 2}i" X 334".No. 31 - For USewith cameras requiring a longer flash duration'than the No.6.

    N o. 50The No. 50 Photoflash lamp has the greatest light output ofall G-E Photoflash Lamps. Preferred for studio color pictures orlarge area coverage, particularly at small lens apertures. Should beused on open flash - or at shutter speeds no faster than 1/25second with M synchronization.

    1 \,PH 50

    \,\,/ I' ' - 0 0 . .10 20 30 40 50 60 70 80 90 100TIME.MILLISECON DS

    PH/50

    Max. A_x'l Approx. ApPfolt. AliProl.Bulb Over- lu mens - Peak RecoIII-Nu",, ,", , , Bulb 1 1 0 Volts 01. 1 1 C l on C S.eond. Lam .. .. Th u 10 Mu. ",end"dIncll". length, aly. aw . Pc.ok in Colo. T yp e fU mInche. in thou .. nd. Secondo .1.."".PH/6

    IB-l1 I S. C. Bay. I 3 I 1% I 2% I 12 I 120 I 16 620 1 . . . . ' 38000K I FastPH/31 A21 Medium 3 2% 5 % 6 60 81 1400 .... -- 38000K FastPH/50 A-21 Medium 3-125 2% 5% 6 60 95 5 000 .030 38000K Any

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    G - E B L U E

    PH/US

    PH/228

    Most of the photoflash lamps described on the preceding pagesare also available w ith a special blue filter lacquer for use withdaylight-type color film s. AI! such lamps are listed on this page.The blue filter is compounded to a high order of accuracy toproduce the best possi bl e ph otoflash so urce 0 f a r ti f ieia I da yl i gh t.G . E.'s Blue Photoflash Lamps may be used to supplement dayl i ghtfor outdoor color pictures or as the sale source of light for indoorcolor pictures on daylight types of color films. No other filtersa re re qu ir ed .

    ;,

    2,I H- O E0

    8, f

    ,_ - 'H- 12er - - ~H llBr t ' \I l~V \.I--P H- B4 rl~ ~

    1 1 J 'I ~~ " . . . .

    4

    s ~ PH 311/ "l1/ , F H -c 8 i\.jl ~ "-9 20 30 40 so-: 60 70 80 90

    2.:I.Z 2.

    ... I.~:> 1.6. . . .- < 1.4~ 1.2~ 1.0. . . .J: OSC) ,:::::;0.6

    2.2, 2

    on 2,()Zw 1_ 8: : ! ::> 1.6_ ,- c I..~ 1.2

    ' . : : : ! : 1.0. . : .,J: o .l!l:::; 0,6o.~0.2H/318 o.

    o o10 20 30 40 50 1>0 70 80 90TIM E-MI Lli SECO NDS TIME -MI LUS ECO N DSBLUEPHOTOFLASH LAMPS, ; ; < - t ~

    Max. App ,o . A~p,ox, App,o . Approx,Bulb O . e . L" ,m"n$ , elkN um b B~lb BI . . Volts Di., .11 C.rton Co.~ So

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    G -E

    H-118H-218

    FT-210FT-214

    Flashtubes are the newest form of photograph iclight source. They give a bright, short flash, 1/1000to 1 /1 ,000,000 seconds, of very high in tensitylight and m ay be flashed thousands of tim es. Thecolor temperature of the light from Flashtubes isapproxim ately 7000 Kelvin which m akes themexcellent for photography w ith black-a nd-whitefi Im s and w ith dayl ight type color fi Im s. L ittle orno filter correction is required for color.The FT -118 is designed fo r sm all portable pho-tographic equipm ent pow ered by high voltagedry batteries. Its unique design perm its m inim umover-all cost of the complete equipment. It hasneither bulb nor base - no socket is required. It isintended to be assembled into a specia I plastic-covered reflector by the equipm ent m anufacturer.T he: F T-118 is identical to the FT-118 exceptthat it is designed for som ewhat larger portable,higher voltage photographic equipments. A t itsm axim um energy input, the resulting photographiceffect equals or exceeds that of a FT-220 whichwas form erly used in sim ilar equ ipm ents.T he: F T-ItO is used in large portable and studioty pe p ho to gra ph ic equiprnents, At its m aximumenergy input its photographic effectiveness equa Isor exceeds that of a PH /5 photoflash lam p at 1/100-1/200 second shutter speed. The source of light(helix) and reflector are an integral unit delivering abeam of approxim ately 450 spread. It is the mostrugged flashtube fo r photographic work.FT -210 and fT -t14 - These flashtu bes use thesam e source or helix as the FT .220. They are general

    FT-220MODELING LAMPS

    60T672/1

    Numb., H . . . LifeFT-403FT-503

    60T6Yz/1100T672 1115-120-125 I D. C. Bay. I 100 hrs,115-120-125 D. C. Bay. 50 hrs.

    Volt.

    purpose tubes for photographic as well as otherspecial applications. Both have outer bulbs andbases and can be used in various sizes and shapes o freflectors. T he F T- 21 a is srns !ler in d ia meter a nd thebase fits into an octal radio type socket. The FT-214has a larger diam eter bulb and a base that fjts thegiant 5-pin socket for larger electronic tubes. Thebase of th is flashtube also has a ti" diam eter holethrough which air-cooling can be injected to perm itrepetitive flashing operation for short interva Is.FT -403 - FT-501 - These flashtubes are de-signed for stud io photographic use in large reflectors.They are of the sam e physical dim ensions but theFT-503 has a special quartz helix which allows overfour tim es the energy input of the FT-403 w ithcorresponding increase in Iight output. Provisionis m ade for moun ting a fjlam ent lamp inside thehelix o f both flashtubes. T he continuous illu minationfrom these lamps shows exactly where and how theflashtube Iighting w i II appear on the subject. TheFl403 w ith the 60-watt m odeling lamp is recom -m ended for black-and-white photography. The FT-503 w ith the 100-watt m odeling lamp isrecom mended for color photography.

    FLASHTUBES

    100T67li

    "'r'" '" A:rrox.M... Ap",o . Helie. So.reeflM.be O.ter H..... Dailln W.U Mox. C Dlmen.lons, Inche. L.C.L. M.O.L.Number Bulb VoU.te Second. Lum-Sec. Qty.Tho_nel. Width I HeightH-118 None C D @ 500 125 5 12 @ @ 1% 2%fT-21 0 T-101F Octal 3-Pin 2000 200 7 12 1% 1% 1:Va, 3%fT-214 T-12M Giant S-Pin 2000 200 7 12 1 V a 1% 2 3%FT-218 None C D @ 1000 200 10 12 C D 1% 2%FT-220 PAR.46 3-Screw Term, 2000 200 .. . 12 1% 1% 3 7 ' 2FT-403 T-181F Luge 3-Pin 2000 480 18 12 1% 2% 3 6~FT-S03 T-181F large 3-Pin 4000 2000 100 6 131 2% 3 6%;

    CDThIs f lalMube i . intended lor us. Ol Iy In cavae

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    G E

    PH/4

    PH/2

    PHIl

    PhotoHood lam ps are high efficiency types of incandescentlamps. For better light control as well as 10 perm it useof sm aller, m ore c on ven ie nt reH ecto r eq uip men t/relativelysmaller inside frosted bulb sizes are used than for the samew attage o.f 'general service lam ps.life of ph oto Hoo dlam ps is short compared w ith 'leneral

    L A M P S

    P H / B 2

    PH/B4

    service lamps but is sufficient for rnenv pictures. Thecolor temperature averages close to 3400'" K thr ougho .u tlamp life. They give excellent results with indoor colorfilm s. B lue bulb photoflood lamps are used t o . supplementdaylight in color photos but are nol .recammended as theonly light source fore.xposing da ylight-types color film s.

    PH OTO FLO OD LAM PS (In s ide F ros ted) 115-110 Volts , N om in .a lI A~ox'l I I I &IbM.ximu.rn

    IRill" I I ~ . . I App.o .Number Bulb s.,'e .Desc.lpllon Oi.mol.o. ()Yeo ... 11 L.",en. ca.. Life .1 Mun11S~1I1 Inc.b Length, at annilly . us Volts Col...Inch". 115 Volt. In Hou," Temp.P H I l 250 A-21 Med. 2% 4ll 8200 60 ) 34000 K.PH/Bl 250 A-21 Med. Daylight 2% 4" 5600 60 3 48000 K6PH/2 500 PS-2S Med. 3% 6* 17000 60 6 34000 KPH/B2 500 PS-2S Med. Daylight 3% 6ft 11000 60 6 48000 KPH/4 1000 PS-3S Mog. 4% 9% 32000 24 10 34000 KPH/B4 1000 PS-35 Mog. Daylight 4% 9% 21800 24 10 4800 K

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    G-E7

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    G .E N ER A L E LE C TR I'C PROJECTION LAMPSARE CONSTANTLY iB E IN G IMPROVED

    The quality of G-E Projection Lamps has resulted from a multitude of developments, extendingover a long period. However, new and additional improvements, have been both rapid and startling.

    Here is shown a G-E Projection Lamp with many improvements which have been introduced duringthe past three years.

    SPECIAL ALLOY BRIDGE SUP.PO RTS - increases strength of w eld .

    JIG FORMED FILAMENT SUP.PORTS- improves screen lumenmeintenence and preserves precisea:l,ignm ent of filam ent segm ents.E lim inates han d form ing and po ssib led isto rtio n o r stra in o f fila m en !.

    MUL TlSECnON LEADS - ma-terials selected to m atch- expansionc ha ra cteristics o f fila me nt a nd mount,H elps prevent filam ent distortion .

    SPECIAL GROUND TUNGSTENSEAL W ,IRE - assures vacuum lightseal at the higher gas pressures usedin th ese lam ps.

    H IGHER GAS PRESSURE INLAM P - im proves uniform ity of life.In cre as es lig ht 0utput and reducessource si ze result.ing in more liShlo n t he screen .

    M ECHAN ICALLY ASSEM BLEDB RID GE S - for accuracy and uniformappearance.

    SPECIAL THREADED PLUG-makes positive electrical contact.In cr ea se s s tre ng th a t filam en t ju nc tu re .In cr ea se s s lr en gth at le ad -in w ir e w e ld .

    MECHANICALLY FORMEDFILAM EN JS - th is improvem ent in-c re as es s cr ee n illum in aHo nin iiia .llyand improves screen lumen main-tenence because the source is moreun:iform , m ore concentrated , and thelight source change during !:ife ism inim ized. In addition, life is moreuniform.

    SPECIAL ALLOY TO W I'TH.STAND HIGH TEM PERATURES -increases siren gth of w e Ids andaccurately holds m ount alignm ent.

    MOLDED SEAL -perm its more_ ......~- accurate positioning of Filam ent andbulb- in relation to the base.AFETY FUSE - the fused w ire lead

    opens circuit i.f arc form s w hen lamp -- .. . . . _ _ . Jburns out and thus prevents dam age tosock et an d protects circuit fu se.

    PLUS the "know how " that comes only w ith years of painstaking lamp m aking, research and developm ent.

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    Bases .. . It will be noticed that this recommended standard lineexhibits only base types which will insure proper orientation 01the filament with respect to the optical system. Only the earlymodels of projectors use screw base type lamps.

    RECOMM ENDED L INE O F PRO JECT ION LAM PSMost modern projectors are designed around the ten typesof lamps listed below. This line 01 tamps gives an adequate rangeof shes Irom 75 watts to 1000 watts. The group of seven lampswith medium preFocus bases Irom 200 wa,tts to 1000 walls represents80 per cent of the demand, with approximately 10 per cent eachfor the lower and a higher wallage group.

    ,.... MlDIUM 'REFOCU5 ---_----------.

    15 150 lO O

    MODER" , TEfORCED

    THE General E lectric Company has always been theleading manufacturer of filam ent lamps for pictureprojection. Its leadership in the developm ent of newand improved light sources has p layed a m ajor partin the advancem ent and developm ent of picture projectionto its present h igh standards of perform ance.Now the General E lectric Company has assum ed a newform of leadership in this im portan t field of lighting. Thevery developm en ts of which it is justly proud haveresulted in a multiplicity of types of projection lamps fargreater than is now needed to serve the varied needs ofold and new projectors. New projectors are beingdesigned for a selected m inimum number of up-la-datelamp sizes. These sam e lamps can often replace oldertypes and thereby enhance the perform ance of olderpro jectors. Th is group of lamps w ill simp] ify the dealer'sstockins problem and make the lamps more readilyava i labl e for re p lace m en! pu rposes. In crea s ed p ro du cti a nof projection lam ps utilizing presen t facilities and furtherquality im provem ents are among the many objectiveswhich are the logical result of standardization.G eneral Electric has, therefore, inaugurated a long-termsimplification program directed tow ards the ultim ateelim ination of obsolescent types and the consolidationof dem and on newer preferred types. There is nothingm andatory about this program . In no instance doesGeneral E lectric propose to im pose any hardship onowners 0 1 p ro je ctio n e qu ip men t. If there is a reasonwhy one of the preferred lamp types should not be used ,General Electric w ill do everyth ing possible to continuesupp lyin~ the type which is required . A ll GeneralE lectric Photo Lamp Dealers are fam iliar w ith this pro-gram , the broad details of which are briefly described Inth e fo llo win g p ara gra ph s.MOST manufacturers of projection equipm ent agreethat, in the fo rseeable futu .re, certain basic lamp wattagesw ill be adequate to m eet their requirem ents. These

    include the 75 , 1 SO, and 300-w att sizes in the T-B andT-872 bu lbs w ith bayonet bases, and the 300, 500, 750,and 1000-watt sizes in T-10 and T-12 bulbs. In thoseinstances where the T-20 bulb is requ ired, the preferredsizes are 1000 and 1500 watts. The choice of the com-bination of watts and bulb size depends upon the typeof equipm ent and the ventilation available in the variousdevices.In most in stances, natural ventilation is adequate for1 SO watts in the T-8 bulb and 300 walls in the T-1 a bulb.W here higher wattages are desired in these bulb sizes,som e type of forced ventilation is required . to m aintainthe bulb and base temperatu res w ith in soilfe operatinglim its. The highest w attage bayonet base lamp w idely usedin m in iature slide projectors w ith w ell-designed forcedventilation is the 30D-w all, T -872 bulb pro jection lamp.Si m i larl y , w hen we II-desi gn ed forced venti Iation isprovided in the more pow erful slide pro jectors and the Band 16-mm motion picture projectors, the higher w attagemedium prefocus base 500, 750, and 1000-watt sizes inthe T -10 and T -12 bulbs are used.U sually one of the preferred watta.ges can be used w ithadvan tage in existing equipments, For instance, the75-watt projection lamp gives distinctly superior resu ltsin most devices which form erly used 50-w att lam ps.The SOO-wait, T -10 bulb projection lamp is favored asa replacem ent for the 400-watt size in m any older modelequipments. .Of course this does no t m ean that lamps can be substi-tuted w ithout regard for dim ensional and other lim itations.A few projectors, unfortunately , have space lim itationsor special light center length requ irem ents which canonly be satisfjed w ith specific lamp types. To aid you inthe selection of the proper lamp, consult your G eneralE lectric Photo Lam p Dealer, the pro jecto r m anufacturer,or the sales representatives o f the G eneral E lectricL am p D ivision.

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    PH/lOT7SC

    PHI' o o s SC

    P HI 5O S D C

    I8PHI~OTB/41SC PH/l'iTa/12 PH/lsT8/106

    G -E

    PHI,OOTDSe PHIl 00f8/. ossc PHI. 00T81' owe

    PH/200T,OP PH/looT,OP

    G ...E Lamps designed for picture projection arecharacterized by the most advanced and exactin g tech.niques of lamp manufacture. In every type the dimensionsand form of the Ii g ht source are chosen to fi t the particularrequirements of some specific optical system or group ofsystems. For every type of projector, lamps o f highestpossible light output from a small source in a bulb ofminimum size are required, To th is end lamps aredesigned up to the safe limits of the materials involvedI t is only by the closest attention to materials and fabri.cation that the superior performance at this rna ximumefficiency is achieved.

    PH "20A~' ' ' ' 9

    The superlative quality of General Electric Projectionlamps is confirmed not only in laboratory tests but alsoby projector manu factu rers' preference.

    The lamps with bayonet bases are used pri'ncipally inminiature slide projectors in the horne and srne Iler class-rooms with screen sizes up to four or five feet. The higherwattage lamps in this group should be used in equipmentproviding forced cooling to protect the slides and tomaintain safe operating limits for the bulb and base.

    PH/500T.O/1SR

    PHl150T8/70 PH/lsoTa/l9 PH/200TDSC

    F O R

    PH/200UDC

    PH/500T,apPH/lOoT, alb' PH/sOOT.O/1LR

    PH/.BA/T'OP

    Where hi gher wattages are required, medium prefocusbase types are eveilab]e in the T.1 0 and T-12 bulbs. Suchlamps are used for the larger min ia:ture sl ide projectors,some lantern sl ide projectors, and 16mm motion pictureequipment. A high degree of forced venti!ation isimportant in this type of equipment in order to mainteintemperatures a.t " safe operating level for the base and bulb.Additional blower or fan cooling is desirable for slidessince they are exposed to high illumination levels formuch longer periods. than are pictures on motionpicture film.

    For lantern slides, the T-20 bulb lamps - SOO-wattsin the short bulb and 1000-watts in the long bulb-are used when only natural ventilation is available.

    General Electric also hasdv"il"ble a limit~d line oflamps for 35-mm motion picture projection. These specialsources ranging from 1000- to 2100watts are genera Ilyused for small theater projection and are not shown inthis catalog.

    The General Electric Bulletin LD164 "Lamps fo rPicture Projectors," I ists the proper ;Iamp or lamps for usein all Iypesand makes of picture projectors.

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    S L I D E S A N D M O V IE S

    PH/IOOTiOP

    PH/150T)~P

    PH/300T8L~/IO

    PROJECTION SERVICEPH/IM/TltP

    PH/300T8' i /IS(

    PH/110T) ~/3LR

    PH/I M/T20N!P

    PH/1M/T12/lLRPH/IM/T12/SlR PHfIM/TI2j4LR

    PH/1500120/lVPHIl M/T20/~O

    I I light M a l O . Appro.. lihi SO" rc.I Sid. Appre . Appro Over- DimlnlionsNumber Rulb R.s. Wath Voll. PM9. filamenl Hours : LUMe(u I C.nh:r all in mmQly. Llle I L~ngth Length IWidt), Hei!htPH/30T7Se T-7 S, C. Bay. 30 , . 24 C(-2V 25 ... 1% 2% 4.0 4.3PH/50S110C S-11 O. C. Bay . 50 " 120 CC-2V 50 825 Hs 2% ' . . . . . . .. ... , ' ....PH/50TB/47SC T-B S. C . Bay. 50 Std. 24 CC-13 50 810 1 3 3 Y s 5.0 5.08PHj50TB/220C T-B D. C. Bay 50 Std. 24 CC-13 50 Bl0 1 }$ 3% ..PH/7sTB/72 T-8 S. C. Bay. 75 Std. 24 CC-13 50 1300 1 38 3 Y s 5.5 4.1PH/75T8/106 T-8 O. C. Bay . 75 Std. 24 Cel] 50 1300 Hs 3 Y s 5.5 4.1PH/l00Sl1SC S11 S. C. Bay. 100 * 120 CC-2V 25 2050 1 s 23 ',8 .8 .. ..... , , . . - - ....PH/l00TBSe T-8 S. C. Bay. 100 510. 24 ((-13 50 1920 1% 3 Y s 5.5 5.1PH /1 OOT8/1OBSe T-8 S. C . Bay. 100 Sid. 24 CC-2V 50 1950 1% Hi 6.7 6.7PH/l OOTB/lOBOC T-8 O. C . B~y. 100 Std. 24 CC-2V 50 1950 1 ~8 3 Y s 6.7 6.7PH/120A21/49 A-21 Med. 120 ,. 120 C-9 25 2700 33/ 4 ) . . ; ; . _ .-8 1;( .. , .. " ..PH/140Tl0/69 T-l0 Med. 140 : > j ; 60 C-9 25 3350 3h 5Y s , .... , _ .....PH /1S0TB /70 T-8 S. C. Bay. 150 Std. 24 2CC-8 25 3350 1 ~s 3% 5.4 6.BPH /1 50T8/79 T-B O. C. Bay. 150 Std. 24 2CC-8 25 3350 1 38 3% 5.4 6.8PH/200T8SC T-8 S. C. Bay. 200 Std. 24 2CC-8 25 4700 1 ~8 3% 6.2 6.5PH/200TaOC T-8 O. C. .say. 200 Std. 24 2((-8 25 4700 138 3% 6.2 6.5PH/200T8/49 T-8 D. C . Pf. 200 Std. 24 2CC-8 25 4700 Hi 3% .. . .. .,. - -H/200Tl0P T-10 Med. p r . 200 Std. 24 CC-13 50 4250 2ft 5%, "-" , . . . ,- .. - ...PH /300T8 ~MlSC T-B% S. C. Bay. 300 Std. 24 C-130 25 ns 4Ys 6.9 7.0 -PH/300T8~/10 T-BH S. C. Bay. 300 Std. 24 (-13 25 7750 Hs 4;"8 8.7 8.5PH /300T8' 2111 T-8~2 S. C . Bay. 300 Std. 24 C-13 25 1 ~s 4~i 8.7 8.5PH/300Ta.14/17 T-81 2 O. C . Bay. 300 Std. 24 (.13 25 . 1 ~~ 4}8 8.7 8.5PH/300110P . T-10 Med. PI. 300 Std. 24 C-13 25 .'., .. 2i\r 5%, B.7 8.5PH/30DTl 0/6-1 T-l0 Med. Pf. 300 Sid. 24 C-130 25 . . . 2.\ 5 ; l 1 t 6.8 7.1PH/SOOT10P T-10 Med. Pf. 500 Std. 24 (-130 25 , ..... 2ft 5%, B.4 7.BPH/500Tl0/3LR T-10 Lg. Index. Ring 500 Std. 24 C-13D 25 ...... 2,\ 5)..

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    G - E ~ L A M P S F O R SIllUelt~tUu-~

    PH/JSA/5SS( PH/75A/SSSCP PH/75A/saDCPPH{1SA I T 5 / 1

    EXCITER lamps are specially designed for soundreproduction system s 10 i Ilum inale the sound track onmotion picture film s. To insure best possible soundreproduction the dimensions and shape of the Filamentof the exciter lamp are tailored to the requirements of thesound optical systems. In General Electric Bulletin LD164"Lamps for Picture Projectors" lamps are therefore listedspeciFically for each model projector. Lamps other thanthose recommended may have filaments of differentshapes or dim ensions w hich could produce less satisfactory

    PH/75A/lSSCPHIl AfTS/7 PH/20A/TsSCP

    PH /6. 5A flaSep PH/4AfT8/34results either because the di m ensions of the scanningbeam at the film are altered or beca use the quality oramount of illum ination in the beam is changed. Of equalim portance are the electrical characteristics of the lamp.The power supply in most projectors has been designedto provide on Iy the voltage and current necessary tooperate the recommended lamp. A lam p of different volt-age or current m ay not operate at the proper level or maydamage the power supply.

    EXCITER LAMPS FOR SOUND REPRODUCTION

    I I I ISid.

    I i AP~ox'l M . O . L Iumbc l Val l> Bulb BIISI: Ampl, Pkg. elm F i l lmen l I H ,! u.. Lu .un. L.C.L.Qlv. L . f ePH/1sA/5SSC 4 5-s 5. C. Bay. .75 100 C (.6 50 32 2 1}4PH/75A/5S5CP 4 5-8 S. C . PI. .75 100 C (6 50 32 2 1UPH /7 SA /SSD(P 4 5-S D. C. PI. .75 100 C (6 50 32 2 1 YsPH/75A/T5~1 4 T-5 S. C . PI. .75 100 C (.8 50 - 2% lY sPH/75A/T5 ( 4 1-5 S. C. Bay. .75 100 C C-6 50 - 2 1}4PH/6.5AC,SSCP 5 1-8 5_ C. PI. 6.5 24 C C-8 so 365 3)1 1%PH/1AA 5/7 6 1-5 S. C. Pf. 1 100 C C-8 100 I 70 2X 1 Y sPH/20 faSSCP 7 1-5 S. C. PI. .20 100 B C -8 50 15 2% 1;l1PH/4A/8/34 8.5 1-8 S. C . Bay. 4 24 C (-8 100 680 3 Ys 1~

    18

    G - E T~ tlWu~ A N D ~ L A M PFilament lamps used in compact m otion picture film viewers closely resemble

    projection lamps. They must have reasonabl y concentrated filaments and behigh in light output. Low wattage is essential since film is often left exposed toII3ht for extended periods during editi ng and because the equi pment issmall in size.

    FILM VIEWING AND EDITING LAMPSId. A'pprox.Numb . . Volts Bulb B o w_ Ph. C I . . . Fli lment Hoyrs Lumenl M.O.L. L.C.L.Qly. Lif.

    PH/30S11/93 1115-12515-11 D. C . Bay. I 30 I 120 I C I CC2V I 50 I 420 I 2% I 1 Y s PH/30511/93

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    PH/211PH/212PH/213G -E Photo Enlarger Lamps have white bulbs which

    give the excellent diffusion and even distribution of lightmost enlarging equipment requires. Five popular sizesof lamps available are:No. 111 - a 7S-watt lamp in an 5-11 bulb with bayonetbase for horizontal operation in min iatureen largers.Nos. 211 and 212 - 75 watts and 150 watts in A-21bulbs with medium screw bases. Base-up operation isrecommended for these types.

    PH/50j150

    No. 213 - 250 watts, high effi-ciency lamp of the photo flood typefor use when maximum light isneeded. from an A-21 bulb lamp.No. 302 - 500 watts in P5-30bu Ib for base-up operation in thelarger reflector-type enlargers. .Three-Lite Enlarger Lamp - 50-100-150 watts. Thislamp provides the range of printing speeds of the No. 211and No. 212 in one lamp, Requires special switchand socket.

    PHj300PHj302

    PHOTOGRAPHIC ENLARGER LAMPS (White) -115-125 Volts, NominalLisht lif~ Bulb , M.. lmurn RatedNumb. , Bulb B a C.,nt., t 11S Di&metlUt 001 1 Lum Cia.. FllamenlI Length, Volls Inch". ll.gth, 01 115Inoh I Inch Volts

    PH/SOj150 A-21 3-Contact Med, 3.% 100 2% 4 .... , , ( 2C-9PH/ll1 s.i- S. C Bay. 1% 25 1% 2% 1120 C CC-2VPHj211 A-21 Med, Hs 100 2% 4H 1200 c (-9PH/212 A-21 Med. 3% 100 2% 4* 2750 C C-9PH/213 A-21 Med, 3% 3 2% 415 7000 C C -96 IPH/300 PS-30 Med. 6 100 3%' 8llf ',." . C (-9PH/302 PS-30 Med, 6 100 3%' 8fa 11000 c (-9

    G-E~cotot, LAM PS F O R C P t r n t lUuu~- .

    F20T12/P(f13T8/PC

    F40T12jPCThe photocolor fluorescent lampshave been especially designed tobring oul all of the colors of colortrensparencies and prints in theirtrue values. They are a coolsource of light for use in trans-illuminators as well as at colorinspection tables.

    PHOTOCOLOR LAMPS FOR COLOR VIEWING

    I I INomin.1

    I IStd.N~mb .. B~lb Bo,e W.Il. D_ipNo" Pkg.Qty.

    PHjF13T8jPCI

    T-8I

    Md, Sip,I

    13I

    f-12/1 PhotocolorI

    24PHjF20T12jPC T-12 Md, Bip. 20 F-24" Photocolor 24PH/F40T12jP( T-12 Md. Bip. 40 F-48" Photocolor 24* ReCiu i,e. ,poel.1 bell.".

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    G E V~ ~0tJ1It, L A M P SPH/7?1\S/2R

    PH/l0S14/NDA PH/l0S14/NDRPH/25A/NDA PH/2SA/NDR

    The 10 and 2S-walt ruby bulb lamps are recommended for use PH/40A/NDA PH/60A21/NDAwith blue sensitive and orthochromatic film s and plates; the PH/40A/NDR40 and 60-w att sizes are for the less sensitive photo process F ilm s.The amber bulb lamps are useful in darkroom s where bothenlarging and contact printing papers are handled.A !I orders for these lamps should specify "for photographicservice." These lamps should not be used w ith penchrornaticfilms. DARK ROOM LAMPSWatts I I B I S .

    IVolb I I

    II I

    Mill II,

    IlAmp Chd SId. Av,. 0.1,- I FiI.-Bulb Descrlpllon Abb l at io n P I o g . L i f e .1 1 (1." menl

    Qty. lor.!llh772 S 11 Med. Std. Red PH/7MS/2R 6-120 1400 2% B C-7A10 5-14 Med. Std. Amber PH/l0514/NDA 6-120 1500 3M B C-910 5-14 Med. Std. Ruby PH/l0S14/NDR 6-1'20 1500 372 8 C-925 A-19 Med. Std. Amber PH/25A[NDA 6-120 1000 Hi B (-925 A-19 Med. Std. Ruby PH/25A/NDR 6-120 1000 311 B C-9.40 A-'ll Med. Std. Amber PH/40A/NDA 6-120 1000 4 - 1 6 B C-940 A-'ll Med. Std. Ruby PH/40A/NDR 6-120 1000 4ft B C-960 A-'21 Med'l Std. Amber PH/60A21/NDA 6-120 1000 4~ C (-960 A-21 Med. Std. Ruby PH/60A21/NDR 6-120 1000 4lk. C C-9q

    PH/60A21/NDR

    PAGE INDEX OF LAMPSLamp Page Lamp Pa,ge Lamp Page Lamp Page

    PHOTOFLASH PH/82 12 PH/300T8Y2/11 17 FILM VIEWINGPH/SM PH/4 12 PH/300l8M/17 177 PH/B4 12 PH/300l10P 17 PH/30S11/93 18PH/M2 7 PH/RFL2 13 PH/sooTl0P 17PHIS a PH/RSP2 13 PH 1500T 10 13lR 11 ENLARGERPH/5B 10 250R/FL 13 PH/500Tl0t3SR 17PH/6 9 PH375/34R4 13 PH/500T20 17PH/6B 10 PH/750R 13 PH/750T12P 17 P H / 5 0 / 1 5 0 19PH/8 8 PH/RSP2 13 PH/750T12/3LR 17 PH/111 19PH/ll 8 PH/1M/T12P 17 PH/211 19PH/11B 10 PROJECTION PH/1M/T12/3lR 17 PH/212 19PH/22 S PH/30nSC PH/l M/T12/4LR 17 PH/2l3 19PH/22B 10 17 PH/l M/T12/5LR 17 PH/300 19PH/3l 9 PH/50S11DC 17 PHil MjT20MP 17 PH/302 19PH/31B 10 PH 1 5 0T B /4 7SC 17 PH/1M/T20 17PH/50 9 PH /50Ts /22DC 17 PH/1M/T20P 17 PHOTOCOLORPH/SOB 10 PH/75T8/72 17 P H / 1 M / T 2 0 1 4 0 17PH/75TS/106 17 PH/1500l20/39 17 PH/F13l8/PC 19FLASHTUBES PH/l00Sl1SC 17 PH/18A/TtOP 17 PH/F20T12/PC 19FT.118 11 PH/l00T8SC 17 PH /300T 10/61 17 PH/F40T12/PC 19FT-210 11 PH 1 1 oots /1 ossc 17FT214 11 PH/l 00T8/1 08DC 17 EXCITER DARK ROOMFT-218 11 PH/120A21/49 17FT-220 11 PH/140T10/69 17 PH/75A/SSSC 18 PH/7Y2S/2R 20FT-403 11 PH/1S0l8/70 11 PH /75 A/5SSCP 18 PH/10S14/NDA 20FT-S03 11 PH/150T8/79 17 PH/75A/SSDCP 18 PH/l0S14/NDR, 20PH/200Ts5C 17 PH/75A/Ts/l 18 PH/25A/NDA 20

    PHOTOFLOOD PH/200TsDC 17 PH/75A/l5SC 18 PH/2SA/NDR 20PH/200T8/49 17 PH /6. 5'Y:T8SCP 18 PH/40A/NDA 20PH/l 12 PH/200Tl0P 17 PH/1AI 5/7 18 PH/40A/NDR 20PH/Bl 12 PH/30oTsM/1SC 17 PH/20Afl5SCP 18 PH/60A21/NDA 20PH/2 12 PH/300T8V2/10 17 PH/4A/ 81 3 4 18 PH/60A21/NDR 20

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    Sal". Distrid Street AdclreSl Telephone No.ALBANY 7, N. Y.ATLANTA 3, GA.BALTIMORE 2, MD.BOSTON 10,MASS.BUFFALO 2, N. Y. .CHARLOTTE 2, N. C.CHICAGO 4, ILL.ChicaO'o Dist. (LarO'e Lamps) .*Midland Di$1. (Specially Lampo).CINCINNATI 2, OHIOCLEVELAND 14, OHIO.DALLAS 19, TEXASDAVENPORT, IOWADENVER Z, COLO... .DETROIT, MICH.Michiqan Oi.l. (Large Lamp.) ."'MolOr City Dtet. (SpeclaUy L"",po)BOUSTON 2, TEXASINDIANAPOLIS 4, IND.N. KANSAS CITY 16,MO.LOSANGELES 5, CALIF.MEMPHIS 7, TENN.MILWAUKEE 3, WIS.MINNEAPOLIS 13. MINN.NEWARK 2, NEWJERSEYNEWHAVEN 10, CONN.NEW ORLEANS 13. LA.NEWYORK 22,. N. Y.New York DW. (L..rlJe Lamp.) .*Atla.nlic Dtet. (Specially Lampo) .OAKLAND 3, C:'ALIF.. .PHILADELPHIA 2, PA.PITTSBURGH 1 1 1 . PA.PORTLAND 10, ORE.RICIIMOND n,VA;ST. LOUIS I. MO.SEATTLE 4, WASH.TAMPA Z. FLA..

    8 Elk Slreel .187 Spring SI.N. W.Cour! Square Bldg..50 HiqhSI..438 Del.ware Ave ..S 14 Iohnsron Bldg.231 So. LaSall.. SI. .aJO So. Clark 51.36 Ea.t Fourth St. .1320 Willie"",on Bldg..6500 Cedar Spring' Rd.30 1 Do .venport Ilank Illdg.1863 Wuee St..1400 &ok Towe. .820 Fish, .. Bldg.807 C & I Lile BldO'.1115 Circl . . Tower .200 E. 161hAvo.3450 WiI.b.ire llIvd.1179 Morahe ..d 51..5032 Plenktuton Bldg..500 StinoOIl IIIyd. .744 Brood Streel. Room 606185 Church 51..... 11040 St. Charles Av.. . .

    34447CYpr .... 1526MUlberry 57733HAncoclc 6.1680.GArfield 738 I4-8614

    G. F. DavisL. J. .CampbellP. M. WoodC. M. ,snyd ...B..E..JerdenG. E. P.. kT. D . Sea.!!F. F. DennyB . V . Comin.gJ. M. LimeR. A. Nungeli.erF. C. HortonJ. P. RogerE. A. AndelSon, .W. Fl.. i.eherG. S. 'Trotter .r . R. Colville, kD. M. Warre"E. C.HenonG. J. EllloW. P. Guole!"onG. E. NelsonK. C. LarabeeE. A. Haw l:1asT. C. LauckH. A. OlsonE. G.AgeeF. M. FaIgeW. H. Rad.. macherW. P. Thay ..rC. A. RostW. S. HemkerB. H. SullivanD. D. SearllD.Il. Clark

    DEa.bom 24712.DEarborn 24712.DUnhar 2460.CHerry 11010ELmhnmt37252.2646MAin 3-6141 .WOodward 36910TRinity 4-1400PReston 4291 .MElrose 2.2536NOrcla1 3568DUnlQ~k5-168 138-1441 .BRoadway 18580GRanville 7286MArkel 33953LOcusl.29828TUb.ne 0731 .PL... a 5,6300 .PLa:za S -6 3O O .LOckhaven 93422KLtgol ey 5333 .GRant 19050B.Eaoon 2101 .32893CHoo!IInut8920SEneca B300 .22269

    570 L..xlnqtcn Ave.570 Lezinqlon Ave..999 - 98th Ave.1405 Locust St . .238 W. Camon SI.2800 N. W. Nela 51.Soulhern Stat". Bldg."l10 No. Twelfth lllvd.202 Hog.. Bldg .50S Twig"s 51. .

    In addition to the Sa]iI9J:1istrtet Heedqu arie:r."icities l:.isiedabove I G~E'L.a.mpeeleemen are residentin, 79 other cities. Consult your telephone directory under General Electric Company Lamp Di"iErion.; 4 1 ; Distriot Office handling mfnieture, photo and Christmas hunpa;.

    General Offioes: Nele Park, Cleveland 12, Ohio

    L A M P D I V I S I O N

    GENERAL. EL .ECTR IC