Camera shutters which also act as diaphragms

Claim 1

IN A CAMERA, IN COMBINATION, COAXIAL LEADING AND TRAILING ROTARY SHUTTER RINGS AND A PLURALITY OF SHUTTER BLADES EACH PIVOTALLY CONNECTED TO ONE OF SAID RINGS AND EACH HAVING A PIN-AND-SLOT CONNECTION WITH THE OTHER OF SAID RINGS, SAID RINGS TURNING TOGETHER FROM A REST TO A COCKED POSITION AND SAID LEADING RING RUNNING DOWN FROM ITS COCKED TO ITS REST POSITION IN ADVANCE OF SAID TRAILING RING FOR DISPLACING SAID BLADES TO AN OPEN POSITION AND SAID TRAILING RING THEN RUNNING DOWN FROM ITS COCKED TO ITS REST POSITION TO RETURN SAID BLADES TO A CLOSED POSITION; A PAIR OF SPRING MEANS OPERATIVELY CONNECTED TO SAID RINGS FOR URGING THE LATTER FROM SAID COCKED TO SAID REST POSITIONS THEREOF; RETARDING MEANS OPERATIVELY CONNECTED TO SAID LEADING RING FOR RETARDING THE RUNNING DOWN MOVEMENT THEREOF; ELECTRICAL DELAY MEANS RESPONSIVE TO THE LIGHTING CONDITIONS AND OPERATIVELY CONNECTED TO SAID TRAILING RING FOR DELAYING THE RUNNING DOWN THEREOF FOR A TIME DETERMINED BY THE LIGHTING CONDITIONS, SAID DELAY MEANS INCLUDING A CONTROL SWITCH; FIRST ADJUSTING MEANS OPERATIVELY CONNECTED TO SAID LEADING RING FOR ADJUSTING THE RATE AT WHICH THE LATTER RUNS DOWN FROM ITS COCKED TO ITS REST POSITION; AND SECOND ADJUSTING MEANS COOPERATING WITH SAID CONTROL SWITCH FOR CONTROLLING THE MOMENT OF ACTUATION THEREOF.