Optics: motion pictures – With rewinding of film strips
Patent
1977-02-18
1978-09-26
Hayes, Monroe H.
Optics: motion pictures
With rewinding of film strips
352173, G03B 2300
Patent
active
041165500
ABSTRACT:
A projector with forward and reverse film drive assemblies and a mode controller assembly for selecting operational modes is provided with a control to selectively stop film transporting when a predetermined film tension occurs. The mode controller assembly is manually shiftable to position the film transport stopping control to reset the control.
The control uses a selectively responsive transmitting assembly arranged to transmit a predetermined film tension from a sensor to a reset member when the mode controller assembly is in selected modes as normal forward and reverse. In other modes as fast forward, pause, still and rewind, the selectively responsive assembly is provided with a release locking assembly to prevent transmission of the predetermined film tension condition to the reset member.
The selectively responsive assembly has a pivotal release arm that controls the position of the reset member when the predetermined film tension condition occurs. The reset member is a vertically biased arm with an extension to position the mode controller assembly to stop the film when the reset is released.
REFERENCES:
patent: 2009442 (1935-07-01), Foster et al.
Kim Raymond W. H.
Prelletz Edward R.
Bell & Howell Company
Fitz-Gerald Roger M.
Hayes Monroe H.
Lapacek James V.
Passman Aaron
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