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1945 Theatre Catalog, 4th Edition, Page 502 (476)

1945 Theatre Catalog, 4th Edition
1945 Theatre Catalog
1945 Theatre Catalog, 4th Edition, Page 502
Page 502

1945 Theatre Catalog, 4th Edition, Page 502

the reconnncinded range of :10 to 52 feet in width. The usual practice is to have the booth constructed on the third or fourth ramp. These ramps are approximately 200 and 240 feet. respectively, from the screen.

The projection room should be placed so that it allows the most efficientuse of the lot area.

The projection building should be located in the, center of the theatre so that the optical axes of the projectors are equidistant from the center line of the screen. The height of the booth above ground should be kept to a minimum so as not to interfere with screen vision from cars parked on the ramps behind the booth. In order to keep the height of the booth to a minimum, the floor of the booth should be approximately 30 inches below the ground level and the ceiling should not be over 8L.) feet in height.

In the majority of the original driveins, the projection room was placed partially underground, so that the projection ports would only be about 18 inches above the ground level. This places the roof of the projection room only about 4 feet above the ground, so that it does not interfere with the vision from cars direct<

THE PROJECTION HOUSE OF THE DRIVE-IN THEATRE, besides being the location for the projection apparatus and associated equipment, is also the site of the ladies' and men's rest rooms. As a proiection booth, the lay-out is not dissimilar to that described elsewhere in this volume for the standard, indoor theatre. While

ly in back of it.

Reports from projectionists of drive-in theatres now show the desirability of buildingr the projection building above the ground, because below-ground installar tions were alllictcd with water seepage and lot drainage, which caused considerable dithculty with electrical wiring. The loss of revenue from the resulting lesser car spaces is more than offset by the dicreased maintenance expense.

The floor and the walls of this building should be constructed of concrete and sealed to prevent seepage. Concrete walls are necessary only to a height slightly above ground level. Wood frame, metal laths, and plastered walls, topped with a flat composition roof may be used with concrete walls.

Space should be provided in this building for an arc-lamp power room. The power room should be at ground level or slightly higher. Electrical wiring conduits should be mounted on the ceiling and walls above ground level to el'minate the possibility of water gettingsinto the electrical circuits, as well as to make better accessibility.

The rest rooms are located adjacent to each other at one end of this building, for economical construction. It is be POWER ROOM e'-o"x I6"0"



I2"O"X 20" O"


lieved by some drive-in theatre owners, however, that more privacy is afforded by having the rest rooms located at opposite ends of the building.

A fence or bushes should be placed along the sides of the projection building towards the screen to prevent spectators from walking or driving; through the projection beam.

In order to obtain maxinnzm efficiency of light transfer from the arc lamp to the screen, there should be the fewest possible number of light obstructions in the light path from the arc lamp to the screen. Anything placed in the light path, such as glass, wire screening in projection ports, or shields on the ar; lamp reflector, will retard the passage of light and result in decreased efficiency. For example, some projectors have a glass partition placed between the shutter and are lamp to keep drafts from disturbing the arc. Even though the glaSS is kept perfectly clean at all times, a minimum of 8 percent of the light will be lost because of reflections, and when the glass becomes dirty or coated with carbon dust, the loss increases. This loss of light is serious in a drive-in theatre, where all available light must be utilized in order to illuminate the screen properly.

this Radio Corporation of America drawing does not show a separate rewind room, it is no! improbable that the structure could be designed so as to include this feature. The men's room serves also as the praiec'ion room lavatory. Dual exits are provided the proiection room, via the men's room and the power room,


1945 Theatre Catalog, 4th Edition, Page 502