Exposure compensating device for photographic cameras

Claim 1

IN A CAMERA HAVING A TAKING LENS AXIS AND ADAPTED TO MOUNT, ON SAID AXIS, ANY OF A PLURALITY OF TAKING LENSES HAVING DIFFERENT MAXIMUM EXPOSURE APERTURES, EACH OF SAID TAKING LENSES HAVING ASSOCIATED THEREWITH A RESPECTIVE ADJUSTABLE DIAPHRAGM NORMALLY IN A MAXIMUM-APERTURE ADJUSTMENT, SAID CAMERA HAVING AN EXPOSURE CONTROL SYSTEM INCLUDING AN ELECTRICAL MEASURING INSTRUMENT AND A PHOTOCELL ILLUMINATABLE BY SCENE LIGHT THROUGH THE TAKING LENS THAT IS MOUNTED ON THE CAMERA, SAID MEASURING INSTRUMENT HAVING AN INDICATOR POSITIONABLE AS A FUNCTION OF THE ILLUMINATION OF SAID PHOTOCELL, THE COMBINATION COMPRISING: (A) MEANS CARRYING AN INDEX MARK; (B) MEANS FOR MOVING SAID MEASURING INSTRUMENT TO POSITION SAID INDICATOR IN A PREDETERMINED RELATION WITH SAID INDEX MARK; (C) A STOP MEMBER COUPLED TO SAID INSTRUMENT FOR MOVEMENT THEREWITH; (D) A SENSING MEMBER COUPLED TO THE DIAPHRAGM ASSOCIATED WITH SAID MOUNTED LENS, SAID SENSING MEMBER HAVING AN INITIAL POSITION SPACED FROM SAID STOP MEMBER AND BEING ADAPTED FOR MOVEMENT INTO ENGAGEMENT WITH SAID STOP MEMBER TO ADJUST SAID LASTNAMED DIAPHRAGM AS A FUNCTION OF THE ILLUMINATION OF SAID PHOTOCELL; AND (E) MANUALLY OPERABLE MEANS FOR MOVING SAID SENSING MEMBER INTO ENGAGEMENT WITH SAID STOP MEMBER.