¡ b-_ a ^-\-\ FOREl^lORD -. This Catalog has been prepared as a setvice to utilities and agents, commercial, industrial and residential customers and all other inter- ests concefned with the practical use of the most efficient General Electric lamps available for specifrc lighting services. Of the tens of thousands of lamps developed by General Electric, only those in popular demand are included in the Catalog. These are the tyPes and sizes that represent the great majority of the nation's annual lamp requirements. They include such fecent General Electric developments as Coloramic Lamps, Bonus Line Lamps, Colored Reflector and Projector Lamps, High Output and Power Groove Fluorescent Lamps and \Øhite Mercury Lamps. They do not include aîy of numerous special service lamps, photographic lamps, automotive, flashlight and other miniature lamps' Essential technical information, scaled illustrations and brief descrip- tions of usage are given to assist buyers and sellers in selecting the right lamp for any particular application' For no matter what the lighting requirement may be, there is a General Electric lamp de' signed specifically for that service' Information on lamps for more specialized services, as well as additional types of lamps for services fisteà, may be obtained through your General Electric Lamp Sales or Service District representative. TARGE tAMP llEPARTMENT GEIIERAL ETECTRIC t Edison's incomparable skill and genius and his tireless res€arch efforts produced the ñrst practicaf incandescent ramÞ. This ûrst unit gf the indu.stry also laid the pattern for General Eiectric lamp development laboratories and resea¡ch programs from which have come many m-emorable achievements th-at ñigtrtigtrt three quarters of a century of continuous progtess. t 2 a GEl{ERAL ETECTRIC INDEX Page Page FILAMENT LA,MPS 7.48 MERCURY 52-55 INDUSTRIAL INFRARED 49 BL,{.CK LIGHT 56 HEAT . 50 FLUORESCENT ,7-69 SUN 50 \TATTAGE GERMICIDÄL 5L INDEX BY 70-7 L OZONE DISTRICT MAP 72 'L G-E LAMPS BY LIGHTING SERVICES OR TYPES Appliance Lamps 28-29 Industrial Infrared Lamps 49 Airport Lamps . Locomotive Lamps 40-41 Black Light Lamps .' 56 Low Voltage Service (Lamps 6v, l2v,) 48 Coloramic 20-21 Lumiline Lamps . 26 Decorative Lamps 22-23 Marine Lar-nps 46 Deluxe White Lamps 19 Mercury Lamps 52-56 Floodlight Lamps 32 Mine Lamps 39 Fluorescent Lamps(Operation and Types) 57-61 Night Lite Lamps 28-29 With Starters 62-65 Optical Devices Lamps 27 \Øithout Starters 65-69 Ozone Lamps 5r Instant Start 65 Projector Lamps 34-35 R.F.. 65 Reflector Lamps . 36.37 Rapid Start 66 Rough Service Lamps 38 High Output . 67 Show case Lamps 33 Power Groove 67 Sign and Decorative Lamps 24-25 68-69 Slimline Lamps Spotlight Lamps 30-32 Circline . 68'69 Studio and Theatre 30-3L General Lighting Incandescent Lamps Display 32 Inside Frosted 10-11 Street Lighting Lamps 44-45 Clear Lamps 12'13 Railway Lamps 47 Silvered and Semi-Silvered Bowl. L4'15 Street Daylight Lamps 16 Sun Lamps 50 tüØhite Bowl Lamps . L6 Th¡ee Lite Lamps L7 GA Lamps (Decorative Enamel) . 18 Trafftc Signal Lamps 47 Germicidal Lamps 5L Train Lamps . 40-4L Heat Lamps 50 Tubular Lamps 33 High Voltage LamPs 48 Vibration Lamps 38 Indicator Lamps 28-29 Yellow Lamps 18 Lamps shown in this catalog are approlimately one'thitd act.râl size except Fluoresceñt, Germicidal, Lumiline, and the Mercury Lamps. Colored lamps are shown in as close , to actual colors ãs possible. Fluorescent lamps and the Surprise Pink Lumiline lamp are shown in approximately the colors as they appear when lighted. 3 One oJ the ntany príaøte laboratoríes in ubícb scíentísts continaally uorï oat ansu)ers to neu design problems, q Pogress ls Our irîosf /mporfanf Producf In General Electric's new Lamp Develop- more efficient lamps and new types of lamps ment Laboratories at Nela Park a staff of ex- to meet new lighting requirements-prog- perts camy on a broad program of research ress that will pass along to the public huge and experimentation with greatly expanded benefits in the form of tremendous savings in facilities and supported by a vast accumulation the cost of light and broader horizons of of scientifrc data. F¡om these effo¡ts will come living made possible by better lamps and continued p¡ogress in the development of better lighting. 4 Installed in thís sectíon are nearly 300 larnþs, 22 dffirent types and sízes, makíng possible innanerable combínatíons of lígbt¡ng efecß, t Progress in application engineering is dem- Visitors to the Institute include representa- onstrated in several "classrooms" of the tives from every division of the lighting in- General Electric Lighting Institute at Nela dustr/i utility executives, architects, engineers, Park. Here, during each year, new light students, lighting equipment manufacturers, sources and techniques in lighting are ex- wholesalers, salesmen and many thousands of plained and demonstrated to many thousands others who have special interest in the neq/est of "students" by the most authoritative staff developments in lamps and lighting for home, of lighting experts in the world. In the above industry of commerce. section of the tighting Institute is demon- A feature display at the Institute is a pano- strated applications of lighting in retail rama of lamp types which porúay the amazing store areas. In other sections, with equal range of services for which General Elecric flexibility, lighting of industial plants, offices, has developed specialized sources oflight and schoolrooms, recfeation centers,. festaurants, related radiation. It suggests the scope of streets, homes and many other special fields available manufacturing, engineering and dis- are demonstrated. tribution services. ) The Measure oÍ OUALITY! The basic function of a lamp is to transform of the finished product. electric current into light. How efficiently it per- Each specification, length and diameter of fila- forms this function during its normal life is the ment, spacing between coils, mandrel size and so measure of its quality. forth is specified sometimes to a one hundred- The current any lamp consumes costs many times thousandth part of an inch. A. frlament which in a the cost of the lamp itself. For insrance a lo0-watt single spot is lVo less in diameter (in a 6-watt lamp which costs 23 cents may use more than 1O lamp that is five-millionths of an inch) than spec- times its cost in current during its life of 7 5O hours. ifred,may reduce its life 2r%. All specifications, for A lamp that initially, or at any time during its life, more than LO,OOO different types of lamps, are is as little as one percent less efficient than another promptly revised when new data indicates a possible is therefore an extravagance regardless of its cost improvement. or life rating. Also essential to uniform high quality is the de- Lamp quality begins with design. To make the velopment of lamp-making machinery and manu- best lamp possible for any particular lighting service facturing procedures that will assure each lamp's requires the skill of the most expert in lamp design. conformance with all details of design. This is For each of the more than IO,OOO different types a challenge to the greatest ingenuity and skill. of General Electric incandescent lamps nov/ manu- General Electric specialists have always met this factured, complete speciñcation for each lamp part challenge and produced machines and methods of is required. such amazing accuracy that the most rigid stand- There aÍe at present about 7oo different speci- ards of quality are attainable in the manufacture fications for glass parts, 2OO speciÊcations for of any type of lamp. To make sure that all quality bases, about 6ooo specifications fo¡ lead-in wires standards are maintained, a comprehensive testing and supports, a countless variety of filament wire of lamps is made during each phase of manufacture sizes, lengths, diameters and processing schedules - 480 tests and checks are made from raw material and more than 2oo different chemicals or compon- to finished product - and millions of sample ents. Each item must conÍibute to the quality lamps are tested every year. This þboto sboøs þart oJ tlte extensiue life test and lamps of all types and sizes, Voltage is controlled by þbotonaetric facilities at Nela Parþ uhìcl¡ are enz- electronic deoices to øitbin one tentb of a oolt in ployed constøntly in quality testìng of lønps, Ran- 120-t,olt circaits. Tìnte of burning ìs determined by dona selections of lømps from all factorìes arrìae aatomatic tinze recorders, daily for testing, Tbere are ooer 12,000 sockets lor ;*rF_ --*.' "1 :irF ör* \ j{l )¡ 6 G.E FILA]YIENT LAMPS a FI LA]YIENTS Electric current passing through the frla- ment rnust ovefcome its ¡esistance and the lol pov/ef consumed heats the frlament to tl incandescence. The almost universally l"I ,îid used Êlament material is tungsten, The l:fl!,i ûlament may be straight wire, a coil, or a coiled-coil (indicated respectively by the letters S, C and CC). Coiling the wire reduces gas losses, increases effi- ciency. The illustrations show some of ilHÅ the commonly used frlament forms (num- W positions. s-r C-1 c-9v c-Cn c-5 c-5 c-ó erals) and their speci6c burning Anv Anv Any Base Up Any Base Down Anv Gas Support lVires Used in most lamps of 4o watts Molybdenum wires hold the and above, prevents rapid evap- filament in place; minimum oration of the frlament, permit- number desirable to ¡educe ting higher temperatures which heat losses. result in higher efficiencies. Gas- frlled lamps are indicated by the letter C, vacuum lamps by ihe letter B. Usual gas is a mixture of nitrogen and argon.