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1950-51 Theatre Catalog, 9th Edition, Page 472 (448)

1950-51 Theatre Catalog, 9th Edition
1950-51 Theatre Catalog
1950-51 Theatre Catalog, 9th Edition, Page 472
Page 472

1950-51 Theatre Catalog, 9th Edition, Page 472

UNIT No. l is the Video Recorder which takes the picture from small receiving tube through a special camera using 16 m.m. film and electronically corrects it to normal film speed of 24 frames per second.

erally associated with 35mm performance. The lens resolves 90 lines per mm. over all parts of the screen image, and there is no center ffhot spot" effect. A sprocket type intermittent, running in a continuous oil bath sealed so that no oil reaches the film, insures long life for intermittent and film. Sound fiutter or "wow" is said to be at an absolute minimum. A scanning slit less than iive tenthousandths of an inch provides a sound response essentially flat from 25 to 7,000 cycles. The equipment may be wired to existing sound facilities with results allegedly equal in quality to 35mm sound.

The three units of the GPL Videofilm System can be located in separate rooms, different parts of the same projection room, or side by side, depending on the geography of the theatre and the space available.


The operation of the GPL System (see. accompanying diagram) is briefly as follows: The video program is photographed froni a small picture tube onto moving film. The film continues into the rapid film processor, where it is developed, washed, dried, and waxed, all in a feW seconds. It next is passed into a 16mm arc lamp projector sufiiciently


powerful to throw a clear image onto a full 24 x 18' screen.

Conversion of the 30-frame-a-second frequency of television to the 24-framea-second standard speed of the motion picture camera is effected electronically when the program is photographed. After the camera has pulled down one frame and is holding it motionless before the aperture, 21 cam-actuated connection

between camera and the video receiver

switches the picture tube into action. The tube remains in operation until scanning of 525 lines is completed. When one complete picture has been impressed on the face of the film frame, the picture tube goes dark until the pull-down has been completed and a new frame is in the aperture. An electronic counting circuit regulates the operation of the picture tube.

Since, the picture tube does not show the ordinary television image, but its negative, no negative film is necessary for immediate projection. The negative image on the tube can photograph positive on the film and is ready for projection the moment it has been developed and dried. The versatile film processor also permits the making of sufiicient negatives for any number of circulating prints.

Magazines are available large enough for more than two hours of continuous

entertainment. In the case of a longer program, the mechanism may be stopped at any convenient intermission and a new film. spliced on at the magazine.

The new GPL camera gate is especially designed to permit half-hour operation without cleaning. If the exhibitor does not intend to show the film at once, it can be threaded back from the rapid film processor to a take-up magazine on the projector. It can then be edited at leisure with standard 16mm editing equipment.

Outstanding Advantages

In spite of the fact that a direct theatre television system projects a picture onto the screen instantly without any delay whatsoever, whereas the GPL Videofilm System requires a few moments to transfer the image to film, the whole process takes only 60 seconds, so the time interval between actual receipt of the signal and the projection of the picture is negligible, especially in View of the previously mentioned benefits to be derived from film as far as the quality of image is concerned.

The advantages of this film intermediate system are not, however, by any means limited to better projection of a

,television broadcast. As a matter of

fact, the GPL Videofilm System has many other features and potentialities which a direct projection system does not provide and which are important from many points of View.

First of all, the GPL System offers the exhibitor complete control over programming. The televised feature can be recorded before the theatre is open to the public, while the feature film is on the screen or at any other time. It can then be projected almost simultaneously with its reception or edited and shown later. The exhibitor can repeat its showing any number of times or route it through an entire circuit of theatres With no additional cost for re-projection of the television recording.

By way of contrast, it is impossible to set showing times for direct projec: tion television unless the televised attraction is definitely scheduled, and even then such scheduling would be subject to fate and the time zones. For example, if Pearl Harbor were to be bombed again at 6 am. on a Sunday morning and a television camera chanced to be on the spot in newsreel fashion, it would reach the theatre television projector set at 10 3.111. on the same Sunday in Philadelphia and New York before theatres were open or patrons available. It could not be delayed, recaptured, or shown later when the audience had assembled under the direct projection system, and, therefore, its stimulant as a boxoliice attraction would be dissipated.

By the same token, the Kentucky Derby and the Rose Bowl football game would be shown at dinner time in certain sections of the country because of the time zone element, while the Philadelphia New Years Parade would start at 5 a.m. in the morning on the screens of West Coast theatres. Obviously, not many theatre patrons would get up this hour to see anything. Thus, even though it is possible to schedule and advertise definite events, as contrasted to the spot news impossibility of doing so on unexpected occurrences such as Pearl Harbor,

1950-51 Theatre Catalog, 9th Edition, Page 472