Camera shutter assembly

Claim 1

IN A CAMERA SHUTTER ASSEMBLY, IN COMBINATION, SUPPORT MEANS; FIRST AND SECOND COAXIAL SHUTTER RINGS TURNABLY CARRIED BY SAID SUPPORT MEANS FOR TURNING MOVEMENT AROUND THEIR COMMON AXIS; A SHUTTER BLADE HAVING A PIVOT CONNECTION WITH ONE OF SAID RINGS AND A PIN AND SLOT CONNECTION WITH THE OTHER OF SAID RINGS AND BEING MOVABLE FROM A CLOSED TO AN OPEN POSITION DURING TURNING OF SAID FIRST RING IN ONE DIRECTION ABOUT SAID AXIS WITH RESPECT TO SAID SECOND RING AND FROM SAID OPEN TO SAID CLOSED POSITION DURING TURNING OF SAID SECOND RING ABOUT SAID AXIS IN SAID ONE DIRECTION WITH RESPECT TO SAID FIRST RING, SAID FIRST AND SECOND RINGS HAVING THE SAME POSITIONS RELATIVE TO EACH OTHER WHEN SAID BLADE IS IN SAID CLOSED POSITION THEREOF; A PLURALITY OF TEETH CARRIED BY EACH RING; A THIRDD RING COAXIAL WITH SAID FIRST AND SECOND RINGS AND CARRIED BY SAID SUPPORT MEANS FOR TURNING MOVEMENT AROUND SAID AXIS; A DRIVE MEMBER CARRIED BY SAID THIRD RING; A PAWL TURNABLY CARRIED BY SAID DRIVE MEMBER AND ENGAGING THE TEETH OF SAID RINGS FOR TURNING THE LATTER IN SAID ONE DIRECTION WHEN SAID DRIVE MEMBER AND THIRD RING TURN IN SAID ONE DIRECTION; AND CAM MEANS CARRIED BY SAID SUPPORT MEANS AND COOPERATING WITH SAID PAWL FOR TURNING THE LATTER WITH RESPECT TO SAID DRIVE MEMBER WHILE THE LATTER AND SAID THIRD RING TURN IN SAID ONE DIRECTION FROM A FIRST POSITION WHERE SAID PAWL ENGAGES THE TEETH OF SAID FIRST RING TO TURN THE LATTER WHILE SAID PAWL IS IN SAID FIRST POSITION WITH RESPECT TO SAID DRIVE MEMBER TO A SECOND POSITION WHERE SAID PAWL ENGAGES THE TEETH OF SAID SECOND RING DURING CONTINUED TURNING OF SAID THIRD RING AND DRIVE MEMBER THEREWITH SO THAT SAID FIRST RING TURNS FIRST IN SAID ONE DIRECTION TO MOVE SAID BLADE FROM SAID CLOSED TO SAID OPEN POSITION AND SAID SECOND RING THEN TURNS IN SAID ONE DIRECTION TO MOVE SAID BLADE FROM SAID OPEN TO SAID CLOSED POSITION THEREOF.