Electronic theater projector

Details Electronic theater projector Electronic theater projector

1979-09-24

1981-03-03

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With intermittently driven carrier-engaging sprocket

352228, G03B 124

Patent

active

042537495

ABSTRACT:
An improved electronic film transport is disclosed for advancing motion picture film past a light gate in a motion picture projector. The light gate includes a transparent plate which imparts a desired shape to the film and, preferrably, one or more indexing pins which align the film with the plate. A sprocket is driven to advance the film to the light gate, causing a loop to form in the film and the film to move clear of the plate and indexing pins. A second sprocket then is driven to advance the film from the light gate. When the film advances one frame, it is again in contact with the plate and the indexing pin and the newly indexed frame is projected.

REFERENCES:
patent: 3218115 (1965-11-01), Barocela
patent: 3408144 (1968-10-01), Cowan
patent: 3565521 (1971-02-01), Butler et al.
patent: 3730616 (1973-05-01), Fliesser
patent: 3937378 (1976-02-01), Kopernicky
patent: 3998533 (1976-12-01), Chamberlin
patent: 4022525 (1977-05-01), Boudouris
patent: 4150886 (1979-04-01), Merkel et al.

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