Lock push button control

Claim 1

IN A LOCK OF THE CLASS DESCRIBED HAVING A KNOB, A PUSH BOTTON MOVABLE ON THE KNOB AND EQUIPPED WITH A LUG, AND A SUBSTANTIALLY L-SHAPED SLOT FORMED FOR SAID LUG ON A PART OF THE KNOB, SAID SLOT INCLUDING A LONGITUDINAL PORTION IN WHICH SAID LUG MOVES AS THE PUSH BUTTON IS DEPRESSED TO AN AXIALLY INWARD LOCKING POSITION, AND A TRANSVERSE PORTION IN ALIGNED RELATION TO SAID LUG WHEN THE PUSH BUTTON IS IN SAID AXIALLY INWARDLY POSITON AND IN WHICH PORTION SAID LUG MAY BE MOVED INCIDENTAL TO ROTATION OF THE BUTTON, THE IMPROVEMENT THAT COMPRISES MEANS EXTENDING BETWEEN THE LONGITUDINAL AND TRANSVERSE MEANS OF THE L-SHAPED SLOT ON SAID PART OF THE KNOB WHEREBY TO HOLD SAID LUG AGAINST MOVEMENT FROM THE LINGITUDINAL TO THE TRANSVERSE SLOT PORTION WHILE SAID BUTTON IS IN SAID AXIALLY INWARD POSITION, AND SAID SLOT FORMED WITH A PORTION ALLOWING CLEARANCE FOR MOVEMENT OF SAID LUG PAST SAID MEANS WHEN THE PUSH BUTTON IS IN A POSITION SOMEWHAT DISPLACED LONGITUDINALLY FROM SAID AXIALLY INWARD POSITION, SO THAT A ROTATING MOVEMENT THEN MAY BE UTILIZED FOR PLACING THE PUSH BUTTON IN ITS AXIALLY INWARD POSITION.