Revolver firing action means

Claim 1

IN A CARTRIDGE FIRING DEVICE HAVING A BARREL ELEMENT AND A CARTRIDGE RECEIVING CYLINDER MOUNTED FOR ROTATION TO A POSITION THEREOF ALIGNING A CONTAINED CARTRIDGE WITH SAID BARREL ELEMENT: A FIRING ACTION MECHANISM COMPRISING A TRIGGER MOUNTED FOR PIVOTAL MOVEMENT FROM A RELEASED POSITION TO A POSITION THEREOF TRIGGERING THE FIRING ACTION MECHANISM TO FIRE SUCH CARTRIDGE, A HAND ELEMENT MOUNTED FOR UPWARD MOVEMENT IN ENGAGEMENT WITH SAID CYLINDER TO MOVE THE LATTER TO ITS SAID POSITION, SAID TRIGGER HAVING AN UPWARDLY FACING SURFACE PORTION EXTENDING GENERALLY TOWARDS THAT END OF SAID TRIGGER WHICH MOVES UPWARDLY DURING ITS SAID PIVOTAL MOVEMENT, SAID UPWARDLY FACING SURFACE OF THE TRIGGER INCLUDING AN UPWARDLY PROTRUDING CAM PORTION, AND SAID HAND ELEMENT HAVING A DOWNWARDLY FACING SEAR PORTION ENGAGING SAID CAM PORTION OF THE TRIGGER DURING SAID PIVOTAL MOVEMENT OF THE LATTER, SAID HAND ELEMENT BEING MOUNTED FOR RECTILINEAR MOVEMENT WITH RESPECT TO SAID TRIGGER, WHEREBY SAID CAM PORTION OF THE TRIGGER URGES SAID HAND ELEMENT IN ITS SAID CYLINDER ENGAGEMENT MOVEMENT IN RESPONSE TO SAID PIVOTAL MOVEMENT OF THE TRIGGER.