Film transport system

Details Film transport system Film transport system

1976-11-08

1978-08-08

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With intermittently driven carrier-engaging sprocket

226 76, 352124, 352166, G03B 124

Patent

active

041053117

ABSTRACT:
An improved transport system for a motion picture projector which permits either intermittent or continuous drive of a film advancement sprocket. The transport is capable of use selectively with film having, for example, either two or four perforations per picture frame. During normal operation of the projector, the sprocket is intermittently driven to advance the film through a gate while a shutter interrupts the projection light. For automated film rewind through the projector, the sprocket is driven at a continuous speed which is preferably higher than the average speed in which the film is intermittently advanced through the projector.

REFERENCES:
patent: 1166120 (1915-12-01), Fox
patent: 2390389 (1945-12-01), Redler
patent: 3606526 (1971-09-01), Smith
patent: 3688058 (1972-08-01), Findlay
patent: 3841742 (1974-10-01), Belvard
patent: 3979966 (1976-09-01), Kotte

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