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1948-49 Theatre Catalog, 7th Edition, Page 436 (423)

1948-49 Theatre Catalog, 7th Edition
1948-49 Theatre Catalog
1948-49 Theatre Catalog, 7th Edition, Page 436
Page 436


1948-49 Theatre Catalog, 7th Edition, Page 436

STRONG

PROJECTION

LIGHTING EQUIPMENT



As the only proiection arc lamps manufactured complete within one Factory, Strong Lamps can be so Engineered as to guarantee best screen results.

THE STRONG MOOIIL

TO -AMPERE - 40 -VOLT PROJECTION ARO LAMP

FOR THE BRIGHTEST POSSIBLE PICTURE



ON THE BIGGEST SCREENS

Projects l5,000 lumens ot lightethe maximum that film will accept without damageeat the lowest possible cost.





S T R O N G 6-TUBE RECTIFIERS

Designed for use with high intensity arcs to product exceptionally smooth output current even beyond the normal requirements of the largest theatres.

The maximum opera. ting load is sufficiently below the capacity of the six l5-ampere tubes to result in exceptionally long life. Regularly supplied for use on 220-volt, three phose, 60-cycle power service. These rectifiers come in three capacities of: 50, 65 and 80 amperes.





STRONG

COPPER OXIDE RECTIFIERS

A rugged, simple and dependable equipment for converting three-phase alternatl ing line supply current to direct current for use with high intensity proiection arcs of from 45 to 65 amps capacity. Transformer taps provide for adiusting the output current over a wide range of amperages and voltage.

Requires no attention or maintenance. There are no moving parts to wear out, make noise or disintegrate.

Built in single lamp units and in two sizes adjustable from 45 to 50 amperes and 45 to 65 amperes.



STRONG UTILITY 1 KW. HIGH INTENSITY PROJECTION ARC LAMPS

for twice the light on screens up to l8 feet in width.



memm STRONG w,msw/

STRONG

4-TUBE RECTIFIERS

Built in two capacities, the 4 v a m p e r e single-phase for use with the l KW. arc lamp, and the 50-ampere threephase for use with larger high intensity lamps, adiustable from 45 to 50 amperes with 35 volts across the arc.

The 40-ampere single-phase rectifier has the exacting volt-amperage characteristics and smoothing reactance to assure a stable burning 40-ampere, 28-volt arc. The 50-ampere 3-phase rectifier has been designed especially to supply DC power to high intensity arcs that are adiustable between 45 and 50 amperes with 35 volts across the arc.





STRONG

2-TUBE RECTIFIERS

The best device for converting alternating current line supply to direct current for low intensity arc operation.

Comprised mainly of a special transformer. a radial switch for regulating the current to the desired number of amperes, two rectifier tubes, a substantial housing, and the necessary sockets, lead wires, etc. An efficiency of 75 per cent means a saving in current, which will soon equal the pur. chase price. Two models, l5-ampere and 30-ampere.





Since the only light which can reach the screen mus the gradual deterioration of a reflector through the use of worn-out reflectors, Endeavoring to make up this light loss throu

is in direct proportion to the loss in mirror efficiency. and amounting to several hundred dollars a year, are not unusual. gh the use of more current similarly represents a pure waste in the form of unwarranted power bills, all of which makes the COst of periodic mirror replacement a good investment. Strong precision reflectors in a variety of types and shes for use in all standard proiector arc lamps have long been recognixed as a dependable standard of quality.

STRONG REFLECTORS

t be reflected by the mirror, the loss in screen light during

Light losses



Write today for free literature on any STRONG

ELECTRIC CORPORATION

THE

One Kilawatt Arc lumps



Lumps

1948-49 THEATRE CATALOG

STRONG



Low Intensity m Lumps

The World's Largest Manufacturer of Proiection Arc Lamps 87 CITY PARK AVENUE



for 35 mm.





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Junior High Ar: Lamps junior High m Lamps Snong Numb, Delaware lwo- Four-lube Rectifiers for is mm.

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products





T O L E D O 2 , O H l O T- E Sixvtubo Copper Oxide Precision Rectifiers Rectifiers Reflectors
1948-49 Theatre Catalog, 7th Edition, Page 436