Railway cars comprising bodies having wide side access openings thereinto

Claim 1

IN RAILWAY CAR BODY COMPRISING A SUBSTANTIALLY RECTANGULAR FLOOR, A SUBSTANTIALLY RECTANGULAR ROOF ARRANGED IN SUPERIMPOSED RELATION WITH SAID FLOOR, A PAIR OF UPSTANDING END WALLS RESPECTIVELY ARRANGED AT THE OPPOSITE ENDS OF SAID BODY, EACH OF SAID END WALLS JOINING BOTH THE ADJACENT END OF SAID FLOOR AND THE ADJACENT END OF SAID ROOF, WHEREBY SAID BODY IS OF ELONGATED BOX-LIKE CONFIGURATION AND HAVING A PAIR OF OPPOSED SIDES THAT ARE OPEN SUBSTANTIALLY BETWEEN SAID END WALLS, A PAIR OF ELONGATED LONGITUDINALLY EXTENDING LOWER RAIL STRUCTURES RESPECTIVELY CARRIED BY THE OPPOSITE LOWER SIDE PORTIONS OF SAID BODY ADJACENT TO THE OPPOSITE SIDES OF SAID FLOOR AND RESPECTIVELY EXTENDING SUBSTANTIALLY BETWEEN SAID END WALLS, A PAIR OF ELONGATED LONGITUDINALLY EXTENDING UPPER RAIL STRUCTURES RESPECTIVELY CARRIED BY THE OPPOSITE UPPER SIDE PORTIONS OF SAID BODY ADJACENT TO THE OPPOSITE SIDES OF SAID ROOF AND RESPECTIVELY EXTENDING SUBSTANTIALLY BETWEEN SAID END WALLS, AND TWO SETS OF UPSTANDING SIDE DOORS RESPECTIVELY ARRANGED AT THE OPPOSITE OPEN SIDES OF SAID BODY AND RESPECTIVELY CARRIED BY THE ADJACENT ONES OF SAID UPPER AND LOWER RAIL STRUCTURES, EACH OF SAID SETS OF SIDE DOORS INCLUDING A PLURALITY OF INDIVIDUAL FIRST SIDE DOORS OF THE PLUG-SLIDING TYPE AND A PLURALITY OF INDIVIDUAL SECOND SIDE DOORS OF THE SIMPLE SLIDING TYPE, EACH OF SAID FIRST SIDE DOORS BEING MOUNTED UPON THE ADJACENT ONES OF SAID UPPER AND LOWER RAIL STRUCTURES FOR LATERAL MOVEMENTS BETWEEN "IN" AND "OUT" POSITIONS RESPECTIVELY DISDPOSED IN CORRESPONDING INNER AND OUTER UPSTANDING PLANES AT THE ADJACENT OPEN SIDE OF SAID BODY, EACH OF SAID FIRST SIDE DOORS IN ITS "OUT" POSITION ALSO BEING MOUNTED UPON THE ADJACENT ONES OF SAID UPPER AND LOWER RAIL STRUCTURES FOR LONGITUDINAL MOVEMENTS THEREALONG IN EITHER DIRECTION IN THE ADJACENT OUTER PLANE, EACH OF SAID SECOND SIDE DOORS BEING MOUNTED UPON THE ADJACENT ONES OF SAID UPPER AND LOWER RAIL STRUCTURES FOR LONGITUDINAL MOVEMENTS THEREALONG IN EITHER DIRECTION IN THE ADJACENT INNER PLANE, IN EACH OF SAID SETS THE ADJACENT ONES OF SAID FIRST SIDE DOORS IN THEIR "IN" POSITIONS IN THE ADJACENT INNER PLANE COOPERATING WITH EACH OTHER AND WITH THE ADJACENT ONES OF SAID SECOND SIDE DOORS IN THE ADJACENT INNER PLANE TO CLOSE THE ADJACENT OPEN SIDE OF SAID BODY, SAID FIRST DOORS IN THEIR "OUT" POSITIONS BEING MOVABLE LONGITUDINALLY IN THE ADJACENT OUTER PLANE INTO COVERING RELATION WITH CORRESPONDING ADJACENT ONES OF SAID SECOND SIDE DOORS IN THE ADJACENT INNER PLANE SO AS TO PRODUCE A COMPOSITE DOORWAY INTO THE ADJACENT OPEN SIDE OF SAID BODY, EACH OF SAID SECOND SIDE DOORS BEING SELECTIVELY MOVABLE LONGITUDINALLY IN THE ADJACENT INNER PLANE UNDER THE ADJACENT ONES OF SAID FIRST SIDE DOORS IN THEIR "OUT" POSITIONS IN THE ADJACENT OUTER PLANE SO AS TO LOCATE THE COMPOSITE SIDE DOORWAY INTO THE ADJACENT OPEN SIDE OF SAID BODY AT ANY LONGITUDINAL POSITION THEREALONG BETWEEN SAID END WALLS, WHEREBY LADING MAY BE READILY PLACED AND REMOVED WITH RESPECT TO SAID BODY AT ANY LONGITUDINAL POSITION THEREALONG AND FROM EITHER OPEN SIDE THEREOF THROUGH AN IMMEDIATELY ADJACENT AND CONVENIENT COMPOSITE SIDE DOORWAY THEREINTO.