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1949 THEATER TELEVISION 325
installation either suspended from the balcony or mounted on a platform in front of the theater mezzanine rather than in the regular projection booth. The ' 'throw distance" can be varied from 45 to 80 feet. RCA plans to manufacture pilot models before the end of 1949 for sale to theaters at a price under $25,000. The first such unit has been ordered for installation in the Fabian Fox Theater in Brooklyn, New York. The installation of microwave receiving equipment and a transmission line would cost approximately $3500 at present prices. The viewing screen is an important element of the direct-projection system. The cathode-ray tube, which is the light source for projection television at this stage of development cannot compete with the carbon arc which is the light source in conventional motion picture projectors. Thus, while standard motion picture screens are generally Jnot directional in distributing the light, much research has been de1 voted to the development of directional screens for theater i television.
The Paramount intermediate-film system consists of (1) television \ receiving equipment , (2) a specially developed recording camera, (3) I rapid film-processing equipment, capable of developing film in less 'than a minute, and (4) a conventional 35-mm motion picture projec! tor. If the program is received over microwave relay, receiving equipjrnent and a transmission line must be installed.
The television receiving equipment is contained in one unit, which c douses both video and audio equipment, and high and low-voltage I power supplies.
The receiver utilizes a 10-inch cathode-ray tube, aluminum-backed, ind with a flat-face screen, from which the picture is photographed. lA 15-inch cathode-ray tube is provided for monitoring purposes. The special recording camera utilizes an electronic shutter, rather ;han a mechanical one, and is synchronized at the standard film rate }f 24 frames per second. Twenty frames before exposure of the picture the sound track is impressed on the film. One of the amazing Matures of this system is the high-speed film-processing unit, into ivhich the film passes by chute directly from the recording camera. The film is lead by vertical chutes into solutions which develop, fix, xnd wash it, and into a compartment which dries it in a maximum Deriod of 66 seconds. The processed film either may be wound on 'I "eels or fed directly to the conventional 35-mm film projector by chute. The equipment requires a room of about 10 by 20 feet floor space, •vhieh is usually located directly above the projection booth. Jit has