Title: Film-transport mechanism for motion-picture projectors, and the like

Abstract: A single rotary cam has one cam track which controls movement of the transport claw in both the forward and reverse film-transport directions. The cam track is so configured that the claw motion constituting the one-frame advancement motion for forward transport constitutes part of the return stroke during reverse transport, and vice versa. The cam-track configuration is such that, despite the constancy of the motion performed by the claw, the position of projected frames is unchanged when switching over between forward- and reverse-transport modes of operation.

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Inventors: Ziegler, Karl (Nellingen, DE, US)

Application Number: 857043
Filing Date: 1977-12-02
Publication_date: 1979-12-04
Assignee: Robert Bosch GmbH (Stuttgart, DE)
Primary Class(es): 226/51 226/65, 226/70
Other Classes:
US Patent Ref:

3612370	Oct, 1971	Thevanaz	226/65.
3640441	Feb, 1972	Keznickl	352/195.

Other Refs:
Primary Examiner: Knowles, Allen N.
Assistant Examiner:
Attorney: Striker; Michael J.