Lading separating bulkheads for railway boxcars

Claim 1

IN A RAILWAY BOXCAR INCLUDING A PAIR OF UPSTANDING LONGITUDINALLY EXTENDING SIDE WALLS DISPOSED IN SUBSTANTIALLY PARALLEL LATERRALLY SPACED-APART RELATION, AND A PAIR OF LONGITUDINALLY EXTENDING TRACKS RESPECTIVELY CARRIED BY SAID SIDE WALLS AND DISPOSED IN SUBSTANTIALLY PARALLEL LATERALLY SPACED-APART AND ALIGNED RELATION; THE COMBINATION COMPRISING A GENERALLY BLOCK-LIKE HOLLOW BULKHEAD ARRANGED IN SAID BOXCAR, SAID BULKHEAD INCLUDING SUBSTANTIALLY RECTANGULAR FRONT AND REAR WALLS ARRANGED IN SUBSTANTIALLY PARALLEL LONGITUDINAL SPACED-APART RELATION AND A SUBSTANTIALLY RECTANGULAR BOUNDARY WALL SURROUNDING AND JOINING THE PERIMETERS OF SAID FRONT AND REAR WALLS, HANGER STRUCTURE CARRIED BY SAID BULKHEAD AND ENGAGING SAID TRACKS FOR SUPPORTING SAID BULKHEAD IN UPSTANDING POSITION IN SAID BOXCAR EXTENDING LATERALLY SUBSTANTIALLY BETWEEN SAID SIDE WALLS AND FOR MOUNTING SAID BULKHEAD FOR MOVEMENTS ALONG SAID TRACKS INTO DESIRED LONGITUDINALLY SPACED-APART POSITIONS IN SAID BOXCAR, WHEREBY OPPOSITE FIRST AND SECOND SIDES OF SAID BOUNDARY WALL ARE RESPECTIVELY DISPOSED ADJACENT TO FIRST AND SECOND OF SAID SIDE WALLS A PLURALITY OF FIRST LOCKING ELEMENTS MOUNTED WITHIN SAID BULKHEAD IN VERTICALLY SPACED-APART RELATION AND PROJECTING LATERALLY OUTWARDLY THEREFROM THROUGH A CORRESPONDING PLURALITY OF OPENINGS PROVIDED IN SAID FIRST SIDE OF SAID BOUNDARY WALL AND INTO COOPERATING RELATION WITH SAID FIRST SIDE WALL, EACH OF SAID FIRST LOCKING ELEMENTS BEING MOUNTED FOR SELECTIVE VERTICAL MOVEMENTS RELATIVE TO SAID BULKHEAD AND BETWEEN LOCK AND UNLOCK POSITIONS WITH RESPECT TO SAID FIRST SIDE WALL, A PLURALITY OF SECOND LOCKING ELEMENTS MOUNTED WITHIN SAID BULKHEAD IN VERTICALLY SPACED-APART RELATION AND PROJECTING LATERALLY OUTWARDLY THEREFROM THROUGH A CORRESPONDING PLURALITY OF OPENINGS PROVIDED IN SAID SECOND SIDE OF SAID BOUNDARY WALL AND INTO COOPERATING RELATION WITH SAID SECOND SIDE WALL, EACH OF SAID SECOND LOCKING ELEMENTS BEING MOUNTED FOR SELECTIVE VERTICAL MOVEMENTS RELATIVE TO SAID BULKHEAD AND BETWEEN LOCK AND UNLOCK POSITION WITH RESPECT TO SAID SEC-