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1948-49 Theatre Catalog, 7th Edition, Page 352 (339)

1948-49 Theatre Catalog, 7th Edition
1948-49 Theatre Catalog
1948-49 Theatre Catalog, 7th Edition, Page 352
Page 352

1948-49 Theatre Catalog, 7th Edition, Page 352

FOR PORTABLE EMERGENCY LIGHTING. packaged all-contained units such as this are availabieJP/Jo/o (om-1:41) 0/ Elev/rir Slurrth Bil/157'} Ca.)

lighting are generally considered adequate; and some theatres, after a study of the power situation in their own localities, may iind storage batteries to be their most practical choice. Size of the theatre, the availability of an emergency power circuit such as in larger cities, and basic lighting requirements will also be decisive factors in this choice.

A specialized type of emergency lighting plant, a water motor generator, was available at one time but does not appear in catalogs or advertising at the present time. To generate 300 watts, this plant required 30 pounds of water pressure and a iiow rate of 55 feet per minute. However, its dependence upon a pressure of at least 30 pounds rendered it useless whenever the pressure dropped because of a fire in the vicinity or for any other cause. Its most logical location would seem to be close to a consistent source of water with a steady pressure, for example, a reservoir supplying water from a hill or mountain top. Otherwise, it can hardly be considered practical.

Storage Batteries

One company, specializing in storage battery systems for emergency lighting for many years, offers 32-volt equipment for a load of 1200 watts or less in small buildings or limited areas where several lights are required. For loads from 1200 watts up to 10,000 watts and more, and for any practical length of emergency protection, 115-Volt equipment is available. Both types consist of a multi-cell, acid-tight, sealed glass jar storage battery system, an automatic charging unit, and an automatic transfer switch unit.

Emergency light is supplied instantaneously and automatically upon failure of the normal light supply. Upon restoration of the normal supply, the emergency lighting is cut off immedie ater from the storage battery and the energy taken out of it during the emergency is quickly and automatically restored. Special charge controls automatically reduce the charge rate at the Proper time to a small trickle to maintain the battery fully charged and instantly ready for the next emergency.


A 32-VOLT EMERGENCY LIGHTING BATTERY BANK is compact and adaptable to small space. Automatic charging unit and power transfer switch accompanies each. (Ply/1m [our/ex) of Eler/rir Sludge Battery Co.)

The entire initial cost, as well as maintenance, is low. The apparatus is simple, reliable in operation, and is so designed that with the use of first class materials, long life is assured without expensive upkeep. With proper care, the complete equipment will give satisfactory life. The system does not require skilled attention.

Another automatic emergency lighting unit produced by the same company is a small inexpensive single or double flood light portable 6-volt set which is

plugged into an ordinary light socket. Lighting more than 8000 square feet, the unit will furnish light continuously for 21/2 hours with standard lamp, and 11/2 hours with both lamps. This type of equipment is very economical, of course, and is said to be very effective for exit lighting.

Standby Power Plants

For more extensive electrical supply, standby power plants which generate electricity are indispensable. Gasoline, illuminating gas or diesel-driven emergency generating units provide practically unlimited periods of standby service and usually range from about 3 to 50 k.w. rating. They are commonly arranged for automatic starting upon failure of the regular power supply.

One of the outstanding manufacturers of this type of electric generating plant provides units with continuous power outputs of 5, 10, 15, 25, and 35 k.w. Normally utilizing gasoline, these plants can also be operated with natural gas, butane, or propane fuels with the installation of gas carburetion equipment.

The plants provide a dependable source of A.C. electricity for both con A llS-VOLT EMERGENCY LIGHTING SYSTEM requires more space, together with automatic charging unit

and automatic transfer switch boxes. not illustrated here.

(Play/o marten of Elern'ir Storage Battery Co.)
1948-49 Theatre Catalog, 7th Edition, Page 352