Automatic exposure control for multiple-objective motion picture cameras

Claim 1

IN A MOTION PICTURE CAMERA, IN COMBINATION, A CAMERA HOUSING HAVING A WALL FORMED WITH AN EXPOSURE APERTURE; A PLURALITY OF OBJECTIVES; CARRIER MEANS CARRYING SAID OBJECTIVES; CONNECTING MEANS CONNECTING SAID CARRIER MEANS TO SAID HOUSING FOR MOVEMENT WITH RESPECT TO THE LATTER TO A PLURALITY OF POSITIONS WHERE SAID OBJECTIVES ARE RESPECTIVELY IN PICTURE-TAKING POSITIONS ALIGNED WITH SAID EXPOSURE APERTURE; A PLURALITY OF DIAPHRAGMS COOPERATING WITH SAID OBJECTIVES, RESPECTIVELY, EACH DIAPHRAGM BEING COMPOSED OF A PAIR OF LEVERS TURNABLY CARRIED INTERMEDIATE THEIR ENDS BY SAID CARRIER MEANS AND HAVING OVERLAPPING APERTURE-FORMING ENDS FORMING AN APERTURE THE SIZE OF WHICH IS DETERMINED BY THE ANGULAR POSITION OF THE PAIR OF LEVERS WITH RESPECT TO EACH OTHER, EACH PAIR OF LEVERS HAVING, RESPECTIVELY, FREE ENDS OPPOSITE FROM SAID APERTURE-FORMING ENDS THEREOF; LIGHT SENSING MEANS CARRIED BY SAID CARRIER MEANS FOR SENSING THE LIGHTING CONDITIONS AND SAID LIGHT-SENSING MEANS INCLUDING A GALVANOMETER WHOSE ROTOR ASSUMES AN ANGULAR POSITION DETERMINED BY THE LIGHTING CONDITIONS; AND MEANS CONNECTING SAID ROTOR TO SAID FREE ENDS OF SAID LEVERS OF EACH DIAPHRAGM FOR AUTOMATICALLY TURNING SAID LEVERS IN RESPONSE TO TURNING OF SAID ROTOR RESPECTIVELY TO POSITIONS WHERE EACH PAIR OF LEVERS PROVIDES AT ITS OVERLAPPING APERTUREFORMING ENDS AN APERTURE OF THE PROPER SIZE FOR THE LIGHTING CONDITIONS.