Electronically controlled aperture and shutter arrangements for use with cameras

Claim 1

IN A CAMERA OPERABLE WITH A LIGHT SENSITIVE FILM, THE COMBINATION, COMPRISING: AN APERTURE DEVICE ADAPTED TO MOVE FROM AN INITIAL POSITION TO PREDETERMINED APERTURE POSITIONS THEREOF, A SHUTTER DEVICE ADAPTED TO MOVE FROM A CLOSED POSITION TO AN OPEN POSITION AND RETURN TO SAID CLOSED POSITION, MEANS FOR ACTUATING SAID APERTURE AND SHUTTER DEVICES TO COMMENCE MOVEMENT TO SAID PREDETERMINED APERTURE POSITIONS AND TO SAID OPEN POSITION, RESPECTIVELY, AND MEANS FOR CONTROLLING THE TIME INCREMENT ELAPSING BETWEEN THE MOVEMENT OF SAID SHUTTER DEVICE FROM SAID CLOSED POSITION AND RETURNING THEREOF TO SAID CLOSED POSITION, SAID MEANS COMPRISING LIGHT SENSITIVE MEANS FOR SENSING THE LIGHT INTENSITY TO WHICH SAID FILM IS EXPOSED THROUGH SAID APERTURE DEVICE, A SOURCE OF POTENTIAL, CAPACITOR MEANS FOR CHARGING TO A PREDETERMINED THRESHOLD LEVEL FROM SAID SOURCE OF POTENTIAL, VARIABLE RESISTANCE MEANS CONNECTED IN CIRCUIT RELATIONSHIP WITH SAID SOURCE OF POTENTIAL AND SAID LIGHT SENSITIVE MANS FOR CONTROLLING ATTAINMENT OF SAID THRESHOLD LEVEL BY SAID CAPACITOR MEANS, THE ARRANGEMENT BEING SUCH THAT SAID TIME INCREMENT IS LESS THAN THE TIME REQUIRED FOR SAID APERTURE DEVICE TO MOVE TO SAID PREDETERMINED APERTURE POSITIONS THEREOF.