Shutter stopping means in motion picture cameras

Claim 1

A MOTION PICTURE CAMERA COMPRISING DRIVING MEANS, A ROTARY SHUTTER DRIVEN BY SAID DRIVING MEANS AND HAVING AT LEAST ONE AXIALLY-OPENING RECESS PROVIDED ON THE FACE OF THE SHUTTER WITHIN THE PERIPHERY OF SAID SHUTTER, A SINGLE MANUALLY-OPERABLE RELEASE MEMBER HAVING AN AXIAL DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE FACE OF SAID SHUTTER AND MOVABLE IN THE SAID AXIAL DIRECTION THEREOF BETWEEN A POSITION OF REST AND A POSITION OF OPERATION, SAID RELEASE MEMBER BEING PROVIDED WITH A LOCKING PORTION OVERLYING THE PERIPHERY OF SAID SHUTTER AND AXIALLY PROJECTING DIRECTLY INTO SAID RECESS ON THE SHUTTER WITH SAID RELEASE MEMBER AXIALLY MOVED INTO SAID POSITION OF REST, SAID SHUTTER HAVING OPPOSED ABUTMENT SURFACES DEFINING THE SIDES OF SAID RECESS AND ENGAGEABLE WITH SAID LOCKING PORTION TO THEREBY RESPECTIVELY LOCK SAID SHUTTER AGAINST MOVEMENT IN OPPOSITE DIRECTIONS OF ROTATION, ONE OF SAID ABUTMENT SURFACES BEING ENGAGEABLE WITH SAID LOCKING PORTION TO INTERRUPT FORWARD MOVEMENT OF THE SHUTTER AND THE OTHER SURFACE BEING SO POSITIONED WITH RESPECT TO SAID LOCKING PORTION AS TO BLOCK THE SHUTTER FROM SWINGING OPPOSITELY WITH RESPECT TO SAID FORWARD DIRECTION OF ROTATION UPON ENGAGEMENT OF SAID LOCKING PORTION AND SAID ONE SURFACE, AND SPRING MEANS FOR URGING SAID RELEASE MEMBER IN THE AXIAL DIRECTION THEREOF INTO SAID POSITION OF REST TO THEREBY ENABLE THE SELECTIVE TAKING OF EXPOSURES.