Optics: motion pictures – Camera and/or projector drive mechanisms – With intermittently driven carrier-engaging sprocket
Patent
1976-06-01
1978-08-29
Hayes, Monroe H.
Optics: motion pictures
Camera and/or projector drive mechanisms
With intermittently driven carrier-engaging sprocket
226 76, G03B 124
Patent
active
041100190
ABSTRACT:
An intermittent drive mechanism for film is disclosed. A driven wheel having sprocket teeth for engagement in perforations in film is coupled by face teeth with the driving wheel and supported for turning about a common axis provided by a supporting shaft. The driving wheel is oscillated by an arm also supported on the common shaft. The teeth on both the driving and driven wheels have a saw-tooth shape and mesh to turn the ratchet wheel when the driving wheel is turned in one direction by the arm, and cooperate to move the driving wheel axially to an idle position when the driving wheel is turned in the other direction by the arm. Also disclosed is a bi-directional drive in which a driving wheel having face teeth on both lateral faces is provided and which is movable axially to bring one or the other sets of face teeth into operative engagement with axially spaced driven wheels having similar face teeth.
REFERENCES:
patent: 1714461 (1929-05-01), Chanier
patent: 3301628 (1967-01-01), Hellmund
patent: 3591265 (1971-07-01), Shropshire
Hayes Monroe H.
Staar S.A.
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