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1945 Theatre Catalog, 4th Edition, Page 371 (347)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 371
Page 371

1945 Theatre Catalog, 4th Edition, Page 371


Designed for use with high intensity arcs to produce exceptionally smooth output current even beyond the normal requirements of

the largest theatres.

The maximum operating load is sufficiently below the capacity of the six 15 -ampere tubes to result in exceptionally long life".

Regularly supplied for use on 220-volt, three-phase, 60-cycle power service. These rectifiers come in three capacities of: 50,

65 and 80 amperes.


A rugged, simple and dependable equipment for converting the three-phase alternating line supply current to direct current for use with high intensity projection arcs of from 45 to 65 amps capacity.

Transformer taps provide for adjusting the output current over a wide range of amperages and voltages.

Require 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.


Built in two capacities, the 40-ampere single-phase for use with the 1 KW arc lamp, and the 50-ampere threephase for use with larger high intensity lamps, adjustable 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 steady burning 40 ampere, 27 volt arc.

The 50-ampere 3-phase rectifier has been designed especially to supply DC power to high intensity arcs that are adjustable between 45 and 50 amperes with 35 volts across the arc.


Strong has developed in this unit, that which is recognized to be the best device for converting alternating current line supply to direct current for low intensity arc operation. Two models, 15 ampere and 30 ampere, are available.

The Strong Arc Lamp Rectifier is comprised mainly of a special transformer, for changing the alternating current voltage to a porential suitable for operating the arc, a radial switch for regulating the current to the desired number of amperes, two rectifier tubes7 a substantial housing, and the necessary sockets, lead wires, etc.

The efiiciency of 75 % attained with Strong Rectifiers A means a saving in current, which will soon equal the pur- % chase price of the rectifiers.


Since the only light which can reach the screen must be reflected by the mirror, the loss in screen light during the gradual deterioration of a re

flector is in direct proportion to the loss in mirror efiiciency.

Light losses through the use of

worn-out reflectors, and amounting

to several hundred dollars a year,

are not unusual.

Endeavoring to make up this

light loss through 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 have

long been recognized as a depend

able standard of quality. Replace

ment reflectors in a variety of types

and sizes for use in all standard

projector arc lamps are regularly

stocked for immediate factory ship




"The World's Largest Manufacturer of Proiecn'on Arc Lamps"

i . uH'



Ta [Mi/irate inquiry n {be above, please mention [[115 volume inm' page mun/1N
1945 Theatre Catalog, 4th Edition, Page 371