Single-lens reflex cameras with lens shutters

Claim 1

A SINGLE-LENS REFLEX CAMERA WITH A LENS SHUTTER AND HAVING A LIGHT AXIS, SAID CAMERA COMPRISING: A SET RING ROTATABLE ABOUT THE LIGHT AXIS OF SAID CAMERA, A CONNECTING AND DISCONNECTING LEVER PIVOTALLY CONNECTED TO SAID SET RING FOR PIVOTAL MOVEMENT ABOUT AN AXIS PARALLEL TO SAID LIGHT AXIS, SAID LEVER HAVING ONE ARM WITH A HOOKSHAPED END AND A SECOND ARM FORMING A TAIL LINK, A ROTATABLE OPENING AND CLOSING RING CINSTITUTING PART OF AN IRIS MECHANISM FOR SAID CAMERA, A PIN ON THE LATTER SAID RING RELEASABLY ENGAGED WITH THE HOOK-SHAPED END OF SAID LEVER, SHUTTER-CHARGING MEANS FOR ACTIVATING A SHUTTER OF THE CAMERA, AND A SWING LINK HAVING ONE END PIVOTALLY CONNECTED TO SAID SHUTTER-CHARGING MEANS AND A FREE END WHICH IS ENGAGEABLE WITH THE TAIL LINK OF SAID LEVER, SAID SET RING AND OPENING AND CLOSING RING BEING ADJACENT ONE ANOTHER AND ROTATABLE ABOUT SAID LIGHT AXIS AS A COMMON AXIS SUCH THAT WITH SAID SET RING ROTATED IN A DIRECTION IN WHICH THE IRIS MECHANISM IS ACTIVATED, THE HOOK-SHAPED END OF SAID LEVER DRIVES SAID PIN TO ROTATE SAID OPENING AND CLOSING RING SIMULTANEOUSLY, SAID TAIL LINK BEING ENGAGED BY SAID SWING LINK ON SAID SHUTTER-CHARGING MEANS WHICH IS RETURNING TO ITS ORIGINAL POSITION, WHEN THE SHUTTER IS RELEASED JUST BEFORE COMPLETION OF ROTATION OF SAID OPENING AND CLOSING RING TO DISENGAGE THE HOOK-SHAPED END OF SAID LEVER AND SAID PIN OF SAID OPENING AND CLOSING RING TO ALLOW THE LATTER RING TO RETURN TO ITS ORIGINAL POSITION, THE MOVEMENT OF SAID OPENING AND CLOSING RING BEING TRANSMITTED TO A REFLECTING MIRROR AND LIGHT-INTERCEPTING PLATE OF SAID CAMERA.