Exposure meter interlocking devices for camera

Claim 1

IN A DEVICE FOR INTERLOCKING AN EXPOSURE METER FOR MEASURING A RANGE OF LIGHT VALUES WITH A DIAPHRAGM FOR A PHOTOGRAPHIC OBJECTIVE IN A CAMERA, THE COMBINATION OF A PAIR OF FALCATE DIAPHRAGM SECTORS DISPOSED SYMMETRICALLY WITH RESPECT TO THE OPTICAL AXIS OF THE PHOTOGRAPHIC OBJECTIVE, EACH OF SAID DIAPHRAGM SECTOR BEING PIVOTALLY MOUNTED BY A PIN AT ONE END IN SAID CAMERA, SAID DIAPHRAGM SECTORS INCLUDING PORTIONS OVERLAPPED WITH EACH OTHER ON WHICH ALIGNED SLOTS ARE FORMED, A LEVER PIVOTALLY MOUNTED TO THE CAMERA BODY AT A FULCRUM, SAID LEVER INCLUDING ONE ARM PROVIDED WITH A PIN LOOSELY EXTENDING THROUGH THE ALIGNED SLOTS, MEANS FOR INDICATING STOP NUMBERS PIVOTALLY MOUNTED ADJACENT THE PIN END OF SAID LEVER MEANS FOR PIVOTING SAID INDICATING MEANS IN RESPONSE TO MOVEMENT OF SAID LEVER, AN EXPOSURE METER INCLUDING A ROTATIONAL SHAFT HAVING A RING-SHAPED CAM SECURED THERETO AND POSITIONED ADJACENT TO THE SIDE OF THE OTHER ARM OF SAID LEVER, SAID RING-SHAPED CAM DEFINING A CAM SURFACE EXTENDING SMOOTHLY OUTWARD FOR PROGRESSIVELY INCREASING DISTANCES PARALLEL TO SAID ROTATIONAL SHAFT AND EXTENDING PERIPHERALLY FOR A PORTION OF THE CIRCUMFERENCE, SAID OUTWARDLY EXTENDING DISTANCES REPRESENTING THE RANGE OF LIGHT VALUES MEASURED BY SAID EXPOSURE METER, AND SAID CAM SURFACE FOR ENGAGING THE ADJACENT END OF SAID LEVER, AND A SHUTTER OPERATING ROD INTERLOCKED WITH A SHUTTER RELEASING ELEMENT AND OPERATIVELY CONNECTED TO SAID LEVER THROUGH A SPRING, WHEREBY SAID LEVER IS BIASED BY SAID SPRING INTO CONTACT WITH SAID RING-SHAPED CAM BY THE OPERATION OF SAID SHUTTER OPERATING ROD TO PIVOT ABOUT ITS FULCRUM A DISTANCE LIMITED BY SAID RING-SHAPED CAM, THEREBY ADJUSTING SAID FALCATE DIAPHRAGM SECTORS IN ACCORDANCE WITH THE LIGHT VALUE AS MEASURED BY SAID EXPOSURE METER.