Device for releasing the movement of a film camera

Claim 1

A RELEASE DEVICE FOR A MOTION PICTURE CAMERA HAVING A DRIVE SHAFT URGED TO ROTATE FOR OPERATING A SHUTTER; SAID RELEASE DEVICE COMPRISING FIRST AND SECOND ABUTMENTS ROTATABLE WITH SAID DRIVE SHAFT AND BEING SPACED APART BOTH CIRCUMFERENTIALLY AND IN A DIRECTION AT RIGHT ANGLES THERETO; A FIRST LEVER PIVOTALLY MOUNTED INTERMEDIATE ITS ENDS AND HAVING A STOP AT ONE END DISPOSED IN THE PATH OF ROTATION OF SAID FIRST ABUTMENT WHEN SAID FIRST LEVER IS IN A REST POSITION TO PREVENT OPERATION OF THE SHUTTER, SWINGING MOVEMENT OF SAID ONE END OF THE FIRST LEVER FROM SAID REST POSITION, IN ONE DIRECTION, SERVING TO WITHDRAW SAID STOP FROM THE PATHS OF ROTATION OF BOTH OF SAID ABUTMENTS SO AS TO PERMIT CONTINUOUS OPERATION OF THE SHUTTER AND, IN THE OTHER DIRECTION, SERVING TO MOVE SAID STOP INTO THE PATH OF ROTATION OF SAID SECOND ABUTMENT SO AS TO PERMIT A SINGLE OPERATION OF THE SHUTTER; A SECOND LEVER EXTENDING ALONGSIDE SAID FIRST LEVER AND PIVOTALLY MOUNTED AT ONE END ADJACENT SAID ONE END OF THE FIRST LEVER FOR SWINGING IN A PLANE PARALLEL TO THAT OF THE SWINGING MOVEMENT OF THE LATTER; COUPLING MEANS CONNECTING SAID FIRST AND SECOND LEVERS AND CAUSING THE OTHER ENDS OF SAID LEVERS TO MOVE IN OPPOSITE DIRECTIONS UPON MOVEMENT OF SAID FIRST LEVER FROM SAID REST POSITION; SPRING MEANS ACTING ON SAID LEVERS ADJACENT SAID OTHER ENDS THEREOF FOR URGING SAID FIRST LEVER TO SAID REST POSITION; AND A RELEASE EFFECTING MEMBER MOVABLE LONGITUDINALLY TOWARD AND AWAY FROM SAID OTHER ENDS OF THE LEVERS AND WITH SAID OTHER END OF BOTH LEVERS SIMULTANEOUSLY IN RESPONSE TO TURNING OF SAID RELEASE EFFECTING MEMBER TO CORRESPONDING ROTATED POSITIONS, WHEREBY LONGITUDINAL MOVEMENT OF THE LATTER TOWARD THE LEVERS SELECTIVELY CAUSES CONTINUOUS OPERATION OF THE SHUTTER, SINGLE OPERATION OF THE SHUTTER AND IS BLOCKED TO PREVENT OPERATION OF THE SHUTTER WHEN SAID RELEASE EFFECTING MEMBER IS TURNABLY POSITIONED FOR ENGAGEMENT OF ITS ECCENTRIC END PORTION WITH ONLY ONE OF THE LEVERS, WITH ONLY THE OTHER OF THE LEVERS AND WITH BOTH OF THE LEVERS, RESPECTIVELY.