US PATENT SUBCLASS 352 / 187
.~ With intermittently driven carrier-engaging sprocket

Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

166  DF  CAMERA AND/OR PROJECTOR DRIVE MECHANISMS {14}
187.~ With intermittently driven carrier-engaging sprocket {3}
188  DF  .~.~> Cam actuated
189  DF  .~.~> Geneva gear actuated
190  DF  .~.~> Special type gearing

DEFINITION

Classification: 352/187

(under subclass 166) Subject matter in which the power source drives the motion picture film through an intermittently rotated toothed drum or disc which engages perforations in the film strip.

SEE OR SEARCH CLASS

226, Advancing Material of Indeterminate Length,

76+, for material advancing structure including a rotating sprocket engaging modifications in the material.