US PATENT SUBCLASS 352 / 188
.~.~ Cam actuated

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

166  DF  CAMERA AND/OR PROJECTOR DRIVE MECHANISMS {14}
187  DF  .~ With intermittently driven carrier-engaging sprocket {3}
188.~.~ Cam actuated

DEFINITION

Classification: 352/188

(under subclass 187) Subject matter in which the sprocket is driven by means of a rotating element with a groove corresponding to periods of sprocket rotation and dwell, and a cooperating following element.