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1950-51 Theatre Catalog, 9th Edition, Page 471 (447)

1950-51 Theatre Catalog, 9th Edition
1950-51 Theatre Catalog
1950-51 Theatre Catalog, 9th Edition, Page 471
Page 471

1950-51 Theatre Catalog, 9th Edition, Page 471

Methods of Exhibition

Two main systems are presently being used by those theatres pioneering theatre television. The First of these is a direct and instantaneous projection system by which high brilliance kineoscopic images are projected through an efficient reflective optical system. The other, discussed below, is a film intermediate system which uses standard motion picture projection techniques, once the television images have been photographed on motion picture film and suitably processed.


This theatre television system, developed by General Precision Laboratory, Pleasantville, N. Y., and demonstrated at the 1950 TESMA Show in Chicago and the TOA Convention in Houston, represents an ideal "marriage" between the immediacy of television broadcasting and the technical advantages of motion picture film projection, as opposed to the imperfections of the ordinary video image.

Anyone who has ever witnessed a conventional telecast can attest to the fact that the picture shown on the receiver screen is often marred by fiicker, blur, unevenness of light distribution, and other shortcomings which have yet to be ironed out in the direct view method.


These drawbacks are, however, not found in the GPL System because, as the name implies, the television picture shown screened is on film with all possible clarity, brightness, and tonequality present.


The GPL Videofilm Theatre System is made up of three compact units: a video recorder, a rapid film processor, and a 16mm projector. An important part of the video recorder is the receivers monitor, designed for quality reception of commercial telecast bands and adaptable to the type of reception involved in each individual installation - whether direct, by microwave, or by coaxial cable. It is said to contain many times the power of an ordinary television receiver with the picture in sharp focus over the entire tube area. The television picture tube image flashes on automatically when film frame is in place. An electronic shutter permits one complete 525-line film scanning, then shuts off the tube while the next frame is moved into position. The high-quality picture monitor assists the operator in obtaining the best results for projection.

The video recorder as a whole uses 16mm, 24 frame-per-second motion picture sound film. Images are produced in negative, reversal positive, or direct

positive. Video recording can be made with video signals received from remote locations. A built-in corrector electronically converts the harsh ffgray" scale of television pictures, as customarily broadcast, to the less contrasting, more pleasant gamma that the public associates with motion pictures. Standard stock tubes are used throughout, and the recorded sound is of superior quality.

The rapid film processor develops film at a synchronous speed of the 16mm sound projector-24 frames a second, 36 feet a minute. The total film processing time from the entrance to the developer and exit from the waxer is 40 seconds. Since operation is fully automatic, the part-time attention of one man only is required. The system shuts off automatically if the film breaks anywhere in the system. Standard film and solutions are used, and the unit may be operated in a fully lighted room. Ordinary hose connections are suitable for all water, air, and waste facilities. Developer, fix, and wash are automatically neutralized so that they can be discharged into any sewer connection.

The 16mm projector used in the GPL System is reported to afford the same brilliance, contrast, and sharpness gen THE PICTURE TRAIN from air to screen passes through the three joined units in less than one minute, plus any editing time necessary.
1950-51 Theatre Catalog, 9th Edition, Page 471