Automatic iris diaphragm operating mechanisms for reflex type cameras

Claim 1

IN A REFLEX CAMERA HAVING A REFLEX MIRROR SWINGABLY MOUNTED WITHIN ITS BODY BEHIND THE OBJECTIVE AND SWINGABLE TO AN INOPERATIVE POSITION, AND A FILM WINDING MECHANISM, THE COMBINATION WITH AN AUTOMATIC IRIS DIAPHRAGM WITHIN THE CAMERA OBJECTIVE AND CONTROLLED BY AN OSCILLATORY ROTATABLE SHAFT, OF A FIRST ARM PIVOTALLY SUPPORTED ON THE DIAPHRAGM CONTROL SHAFT, A SECOND ARM INTEGRALLY ON THE DIAPHRAGM CONTROL SHAFT ADJACENT TO THE FIRST ARM, AN ACTUATING DRIVE SPRING BRACED BETWEEN THE FIRST AND SECOND ARMS, AN OSCILLATABLE MEANS TO TENSION THE ACTUATING DRIVE SPRING UPON WINDING THE FILM, A LEVER COUPLING THE SECOND ARM TO A DIAPHRAGM ACTUATING RING TO MOVE IT TO A PREDETERMINED APERTURE BY THE TENSION OF THE ACTUATING SPRING, A CAM ADJUSTABLE IN THE PATH OF THE COUPLING LEVER TO PREDETERMINE THE DIAPHRAGM OPENING, A FIRST LATCH ADAPTED TO ENGAGE THE FIRST ARM WHEN SUCH ARM IS SWUNG TO TENSION THE ACTUATING SPRING, A SECOND LATCH ADAPTED TO ENGAGE THE SECOND ARM UPON TENSIONING THE ACTUATING SPRING, A FIRST RELEASING MEANS ACTUABLE BY THE DEPRESSION OF THE RELEASE BUTTON TO RELEASE THE SECOND LATCH, A SECOND RELEASING MEANS RESPONSIVE TO CLOSURE OF THE SHUTTER AFTER AN EXPOSURE IS MADE TO RELEASE THE FIRST LATCH, AND A DIAPHRAGM OPENING SPRING MOVING THE DIAPHRAGM ACTUATING RING IN A PREDETERMINED DIRECTION AUTOMATICALLY TO OPEN THE DIAPHRAGM TO ITS FULL OPEN APERTURE IMMEDIATELY UPON HAVING MADE AN EXPOSURE TO PERMIT THE VIEWING OF A VERY BRIGHT IMAGE OF THE OBJECT TO BE PHOTOGRAPHED THROUGH THE MIRROR IN ITS OPERATIVE POSITION AND THE FULLY OPENED DIAPHRAGM.