Mirror control arrangement for reflex cameras

Claim 1

IN A PHOTOGRAPHIC MONOCULAR MIRROR REFLEX CAMERA HAVING A HOUSING, AN OBJECTIVE LENS AND VIEW-FINDER DEVICE ARRANGED IN THE HOUSING A SHUTTER DEVICE, ROLL-FILM SUPPORT MEANS, COCKING AND FILM WINDING MECHANISM IN THE HOUSING OPERATIVELY CONNECTED TO SAID SHUTTER DEVICE AND SAID SUPPORT MEANS FOR SIMULTANEOUS COCKING OF SAID SHUTTER DEVICE AND FILM-WINDING, A REFLEX MIRROR PIVOTALLY MOUNTED IN THE HOUSING AND MOVABLE BETWEEN A FIRST POSITION WHERE IT LIES IN THE OPTICAL PATH BETWEEN THE LENS AND THE FILM IN ORDER TO REFLECT THE IMAGE INTO THE VIEWFINDER DEVICE AND A SECOND POSITION WHERE THE MIRROR IS CLEAR OF SAID OPTICAL PATH DURING PICTURE-TAKING, FIRST SPRING MEANS FOR BIASING SAID MIRROR TOWARDS ITS SECOND POSITION, SAID SHUTTER DEVICE INCLUDING A SHUTTER, A DRIVING WHEEL, TRANSMISSION MEANS CONNECTED BETWEEN SAID DRIVING WHEEL AND SAID SHUTTER, AND SHUTTER RELEASE MECHANISM, THE PROVISION OF A BLOCKING DISC IN THE HOUSING ARRANGED COAXIALLY WITH SAID DRIVING WHEEL, A CAM DISC COUPLED WITH SAID BLOCKING DISC, A CAM SURFACE ON SAID DISC, A CAM FOLLOWER PROVIDED ON SAID MIRROR AND CAPABLE OF ENGAGEMENT WITH SAID CAM SURFACE TO BE DRIVEN THEREBY ON THE ROTATION FO THE CAM DISC TO EFFECT MOVEMENT OF SAID MIRROR