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1945 Theatre Catalog, 4th Edition, Page 352 (328)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 352
Page 352

1945 Theatre Catalog, 4th Edition, Page 352


Generous consideration should be given to the problem of lighting the projection room.

Indirect or semi-direct ceiling fixtures'

should be provided at the operating side of each piece of equipment. All lights should be shaded to prevent light from entering the auditorium through the portholes.

It is advantageous to provide convenience outlets along the base of the wall for the use of the projectionist.

All portable work lamps shall be provided with approved lamp guards. All projection room fixed lights shall be provided with approved lamp guards or be protected by noncombustible shades or other inclosures.


Two separate ventilation systems are necessary in the projection room: one for the ventilation of the room proper, the other for the carbon-arc equipment.

Projection room ventilation must be provided by means of a vent pipe or pipes, which are installed to vent to the outside atmosphere.

Each piece of equipment of the carbonarc type should be connected to a common duct which runs directly to the outside air. This duct must, where outside venting is not possible, vent into a noncombustible fiue of special design. An exhaust fan connected to this system should provide a movement of not less than 15 cubic feet of air through each arc lamp every minute.

Vent pipes must be run so that they will always be at least 2 inches from any combustible material, or non-combustible, heat-insulating material, 1 inch thick, must be applied in an approved manner to such vent pipes as a safety measure.

The general projection room ventilating system consists of at least two freshair intakes, one at each end of the room, along the fioor line. The exhaust system

must be entirely independent of any other system in the theatre. Exhaust draft must be maintained in the projection room by a fan having a capacity of at least 200 cubic feet a minute for every 80 square feet of door space in the projection room. This system terminated in at least two ceiling grilles, and is operated by a blower of the proper size.


The appearance of the projection room may be greatly enhanced by painting the walls olive green from the fioor to the point where the acoustical material starts. The acoustical material should be painted a dull buff color and the ceiling white. In many localities it is permissible to cover the floor with a good grade of battleship linoleum cemented in place.


Two-way telephone communication between the managers ofiice and the projection room is a definite necessity in modern theatre operation. Provisions should be made to locate the projection room telephone at a point on the front

wall to permit the projectionist to con- ,

tinue observing the screen while using the communication system. In many instances, it may be desirable to have additional stations located at such points as the rear of the auditorium or on the stage.


Rewinding of films should be done in a separate enclosure, known as the rewind room, adjacent to the projection room proper. This rewind room should be a miniature of the projection room with respect to construction.

Because of the flammable nature of film-and the ever-present fire hazard which proper construction seeks tolreduce to the minimumeit is well to digress for a moment and consider very briefiy the handling of film in rewind rooms. Film, while being rewound, should


be enclosed in an approved rewinder, consisting of enclosures similar to the projector magazines. No film shall be exposed during rewinding. Not more than 5 feet of film shall be exposed during examination. Film for the current show, when not being projected or rewound, shall be kept in a fire-resistant, approved film storage cabinet, such cabinet to have an individual storage compartment for each reel. This cabinet should be so constructed that its compartments will be self-closing when a reel is placed in the compartment. All films in the projection room must be kept in such cabinet at all times when not in actual use. Film stored in exchange containers is not permitted in the projection room during show but must be protected by an apprOVed cabinet or compartment. Attraction trailers, leaders, and other film stock not being used must receive the same consideration.

Rewind rooms must provide no less than 80 square feet of floor space for hlm rewinding and storage facilities.

One observation porthole should be provided in such a position that the projectionist may view the screen while in the rewind room. An additional porthole should be provided in the wall separating the rewind room from the projection room proper, and should con .sist of a nxed steel frame and polished

plate wire glass window having an area of not more than 200 square inches. The horizontal centerline of this latter porthole should be located 5 feet above the fioor line.

The rewind room may be connected to the same fresh-air and exhaust system that supplies the projection room.

Painting and general lighting conform with those of the propection room proper.

Recommended auxiliary lighting consists of either a reel light or a fixed wall bracket over the rewind table.


The construction of the power equipment room conforms with that of the projection room proper. The size of the room must be governed by the quantity and kind of equipment installed. It is advisable to allow space for possible future needs.

The power equirment room should be well lighted and convenience outlets provided along the base of the wall. It should be ventilated by the general projection room ventilation system and painted to match the other rooms.

Motor-generators, transformers, rectifiers, rheostats and similar equipment should be located in a separate room; however, under conditions where such installation is not practical, it is well to consult local authorities concerning other approved means of making a safe installation.


A clean, neat, and well-equipped lavatory is a definite asset to the efficient operation of the projection room. Modern sanitary facilities, a good wash basin with running water, and a fiush-type medicine cabinet in a tiled fioor room not only aid the appearance of the projection room, but reflect the generous consideration given to the convenience of the projectionist.


1945 Theatre Catalog, 4th Edition, Page 352