Adjustable bulkhead

Claim 1

A LOCKING MECHANISM FOR RETAINING A DEVICE IN A PRESELECTED POSITION, SAID LOCKING MECHANISM INCLUDING A LOCKING MEMBER, MEANS SUPPORTING SAID LOCKING MEMBER UPON SAID DEVICE FOR MOVEMENT INTO AND OUT OF ENGAGEMENT WITH A COOPERATING LOCKING MEMBER, A TORSION MEMBER SUPPORTED UPON SAID DEVICE FOR ROTATION, MEANS OPERATIVELY CONNECTING SAID TORSION MEMBER TO SAID LOCKING MEMBER FOR OPERATING SAID LOCKING MEMBER UPON ROTATION OF SAID TORSION MEMBER, SAID TORSION MEMBER HAVING A RADIALLY EXTENDING BORE FORMED THEREIN, AN OPERATING HANDLE JOURNALED FOR ROTATION UPON SAID TORSION MEMBER CONTIGUOUS TO SAID BORE, SAID OPERATING HANDLE BEING ROTATABLE FROM AN AT-REST POSITION TO A LOCKING MECHANISM ACTUATING POSITION, A PIN SUPPORTED FOR RECIPROCATION BY SAID OPERATING HANDLE, SAID PIN BEING JUXTAPOSED TO SAID BORE AND OUT OF ENGAGEMENT WITH SAID BORE WHEN SAID OPERATING HANDLE IS IN ITS AT-REST POSITION, AND MOTION TRANSMITTING MEANS FOR RECIPROCATING SAID PIN INTO ENGAGEMENT WITH SAID BORE UPON ROTATION OF SAID OPERATING HANDLE FROM ITS AT-REST POSITION TOWARD ITS LOCKING MECHANISM ACTUATING POSITION FOR SIMULTANEOUS ROTATION OF SAID TORSION MEMBER AND SAID OPERATING HANDLE UPON CONTINUED ROTATION OF SAID OPERATING HANDLE TO ITS LOCKING MECHANISM ACTUATING POSITION.