Photographic camera with electrical exposure meter

Claim 1

FOR USE IN A PHOTOGRAPHIC CAMERA OF THE TYPE EQUIPPED WITH AN EXPOSURE METER HAVING A PHOTO-RESISTANCE CELL, CONNECTED IN A BRIDGE CIRCUIT INCLUDING A VOLTAGE DIVIDER RESISTANCE HAVING AN ADJUSTABLE TAP, AND HAVING A MOVING COIL INSTRUMENT OF THE NULL BALANCE TYPE CONNECTED ACROSS THE BRIDGE CIRCUIT AND TO THE ADJUSTABLE TAP, THE RESISTANCE OF THE CELL BEING INFLUENCED BY THE SETTING OF AN OBJECTIVE DIAPHRAGM: THE COMBINATION COMPRISING AN EXTERNALLY ACCESSIBLE MANUALLY ADJUSTABLE SETTING DEVICE; AN ADJUSTABLE DIAPHRAGM APERTURE SETTER; AN ADJUSTABLE SHUTTER TIME SETTER; DIFFERENTIAL GEARING INTERCONNECTING SAID SETTING DEVICE, SAID DIAPHRAM APERTURE SETTER, AND SAID SHUTTER TIME SETTER FOR INTERDEPENDENT OPERATION OF SAID DIAPHRAGM APERTURE SETTER AND SAID SHUTTER TIME SETTER BY SAID SETTING DEVICE; MEANS RELEASABLY RETAINING SAID SHUTTER TIME SETTER IN ADJUSTED POSITION; MEANS POSITIVELY LIMITING THE RANGE OF MOVEMENT OF SAID DIAPHRAGM APERTURE SETTER; WHEREBY, UPON ADJUSTMENT OF SAID SETTING DEVICE, SAID DIAPHRAGM SETTER WILL BE ADJUSTED WITHIN ITS LIMITED RANGE OF MOVEMENT AND, AT EITHER END OF SAID RANGE, SAID DIAPHRAM APERTURE SETTER WILL REMAIN STATIONARY SO THAT ADJUSTMENT OF SAID SETTING DEVICE WILL EFFECT MOVEMENT OF SAID SHUTTER TIME SETTER; A MOUNTING MEANS FOR SUCH ADJUSTABLE TAP; AND MEANS ADJUSTABLY COUPLING SAID MOUNTING MEANS TO SAID SHUTTER TIME SETTER FOR CONJOINT MOVEMENT WITH THE LATTER.