Structure for starting and stopping a motion picture camera

Claim 1

IN A MOTION PICTURE CAMERA, IN COMBINATION, A CAMERA HOUSING HAVING IN ITS INTERIOR A TRANSVERSE WALL EXTENING SUBSTANTIALLY PARALLEL TO A FRONT WALL OF THE CAMERA; A ROTARY SHUTTER DISC TURNABLY CARRIED AT LEAST IN PART BY SAID TRANSVERSE WALL AND CARRYING AT A FRONT FACE WHICH IS DIRECTED TOWARD SAID FRONT WALL OF SAID CAMERA AN ANNULAR CAM WHOSE CENTER COINCIDES WITH THE CENTER OF SAID DISC, AND SAID CAM HAVING A FRONT HELECAL SURFACE AND BEING FORMED WITH A NOTCH; A LEVER TURNABLY SUPPORTED IN SAID CAMERA HOUSING BETWEEN SAID TRANSVERSE WALL AND FRONT WALL THEREOF FOR MOVEMENT ABOUT AN AXIS PERPENDICULAR TO THE AXIS OF ROTATION OF SAID DISC, SAID LEVER HAVING A PROJECTION LOCATED IN SAID NOTCH TO STOP THE TURNING OF SAID DISC ; DIRVE MEANS OPERATIVELY CONNECTED TO SAID DISC TO ROTATE THE LATTER; AND MANUALLY ENGAGEABLE MEANS MOVABLY CARRIED BY SAID FRONT WALL OF SAID CAMERA HOUSING AND ENGEGING SAID LEVER FOR TURNING THE SAME TO A POSITION WHERE SAID PROJECTION THEREOF IS OUT OF SAID NOTCH SO AS TO RELEASE SAID DISC FOR ROTATION.