Photographic camera with focal-plane shutter

Claim 1

A PHOTOGRAPHIC CAMERA PROVIDED WITH A FOCAL PLANE SHUTTER AND WITH A SINGLE RECIPROCATING OPERATING LEVER HAVING A LONG STROKE EFFECTIVE FOR TRANSPORTING THE FILM AND COCKING THE SHUTTER, AND A SHORT STROKE TAKING PLACE IN THE SAME DIRECTION AS THE SAID LONG STROKE, EFFECTIVE FOR RELEASING THE SHUTTER, SAID CAMERA COMPRISING THE FOLLOWING FEATURES, IN COMBINATION: (A) THE OPERATING LEVER IS PROVIDED WITH A HOLLOW SHAFT COAXIAL WITH THE FILM TAKE-UP SPOOL, SAID SHAFT BEING CONNECTED WITH SAID SPOOL BY A STEP-UP GEAR, (B) A CENTRAL SHAFT COAXIAL IN SAID HOLLOW SHAFT CARRIES RESPECTIVELY, ON ITS TWO ENDS, A CONTROL KNOB FOR ADJUSTING THE DURATION OF AN EXPOSURE, SAID KNOB HAVING A READING FACE IN REGISTRY WITH AN INDEX CARRIED ON THE HUB OF SAID LEVER, AND A SPIRAL CAM EFFECTIVE FOR ADJUSTING THE DURATION OF AN EXPOSURE, SAID CAM BEING OPERATIVELY IN MESH WITH A SHUTTER RELEASE DEVICE, (C) THE HOLLOW SHAFT OF THE OPERATING LEVER CARRIES A RADIAL ARM WHICH IS LINKED BY A CRANK TO A SHUTTER COCKING ROD, SAID ARM FURTHER BEING AN INTERMEDIARY DRIVING MEMBER FOR THE TAKE-UP SPOOL AND ALSO BEING AN INTERMEDIARY MEMBER EFFECTIVE (1) FOR COCKING A SHUTTER RELEASE SPRING AND (2) FOR RELEASING THE SHUTTER.