Circuit arrangement for electrically operated repetitive still cameras

Claim 1

IN A CONTROL CIRCUIT ARRANGEMENT FOR ELECTRICALLY OPERATED PHOTOGRAPHIC CAMERAS OF THE TYPE IN WHICH A CONSTANTLY OPERATING MOTOR SOMETIMES DRIVES A CONTROL SHAFT THROUGH A SWITCH-ENGAGED ELECTROMAGNETIC CLUTCH, SAID CONTROL SHAFT BEING OPERATIVELY CONNECTED TO A SHUTTER ACTUATOR THROUGH AN ENERGY-STORING MEANS WHICH THEREFORE SOMETIMES BIASES SAID SHUTTER ACTUATOR TOWARD AN EXPOSURE-TAKING POSITION, SAID ACTUATOR BEING NORMALLY HELD IN INOPERATIVE POSITION BY A STOP MEANS, WHICH IS ELECTRICALLY RELEASABLE AT TIMES TO ALLOW SAID ENERGY-STORING MEANS TO OPERATE SAID ACTUATOR TO EFFECT AN EXPOSURE; THE IMPROVEMENT WHICH COMPRISES: A CONJOINT ELECTRIC CONTROL MEANS OPERATIVELY CONNECTED TO SAID STOP MEANS AND SAID ELECTROMAGNETIC CLUTCH, SAID CONJOINT ELECTRIC CONTROL MEANS BEING OF SUCH CONSTRUCTION THAT ELECTRICAL ACTUATION THEREOF WILL RELEASE SAID STOP MEANS AND SIMULTANEOUSLY SWITCH SAID ELECTROMAGNETIC CLUTCH TO ITS ENGAGING POSITION, THEREBY INITIATING THE EXPOSURE-TAKING OPERATION OF SAID SHUTTER ACTUATOR AND, AT THE SAME TIME, STARTING THE ENGAGEMENT OF SAID ELECTROMAGNETIC CLUTCH TO DRIVINGLY CONNECT SAID MOTOR AND SAID CONTROL SHAFT, SO AS TO BEGIN THE STORING OF ENERGY FOR THE NEXT EXPOSURE IN SAID ENERGY-STORING MEANS AS EARLY AS FEASIBLE.