SINGLE FRAME ADVANCE MECHANISM FOR PICTURE PROJECTORS

摘要

A mechanism for motion picture projectors and the like for advancing a strip of film one frame at a time. A brake mechanism is tripped by a pin located upon one of the rotating shutter blades which then permits the brake to engage another of the shutter blades to stop its movement at a position leaving the shutter open. At the same time the mechanism disengages a clutch drive between the shutter and its drive motor so that the shutter is free running just prior to braking.