Hopper car

Claim 1

FOR USE WITH A HOPPER CAR COMPRISING A COMPARTMENT TAPERING INWARDLY AND DOWNWARDLY AT ITS OPPOSITE SIDES TO AN ELONGATED RECTANGULAR DISCHARGE OPENING AND A TROUGH MEMBER SECURED TO THE COMPARTMENT UNDER THE OPENING HAVING INWARDLY AND DOWNWARDLY TAPERING SIDES DEFINING SMOOTH CONTINUATIONS OF THE OPPOSITE SIDES OF THE COMPARTMENT AND MERGING INTO AN ARCUATE SECTION BOTTOM, A CIRCULAR DISCHARGE TUBE AT AT LEAST ONE END OF THE TROUGH WHOSE BOTTOM PORTION FORMS AN ELONGATION OF THE BOTTOM PORTION OF THE TROUGH, A COVER FOR THE DISCHARGE TUBE HINGED TO THE TUBE AT ONE SIDE THEREOF FOR SWINGING FROM AN OPEN POSITION BESIDE THE TUBE TO A CLOSED POSITION OVERLYING THE END OF THE TUBE, AN ARM PIVOTED AT ONE END ON AN AXIS PARALLEL TO AND AT ONE SIDE OF THE TUBE WITH ITS OTHER END FREE FOR SWINGING CENTRALLY OVER THE OUTER FACE OF THE COVER WHEN THE COVER IS IN ITS CLOSED POSITION, A CAM SURFACE ON THE OUTER FACE OF THE COVER ENGAGEABLE WITH THE FREE END OF THE ARM, A SPRING ACTING ON THE ARM URGING ITS FREE END TOWARD THE DISCHARGE TUBE THEREBY TO PRESS THE COVER RESILIENTLY TOWARD ITS CLOSED POSITION, AND A ROTATABLE LATCH MEMBER CONNECTED TO THE ARM TO BE TURNED THEREBY INTO LATCHIONG ENGAGEMENT WITH THE COVER WHEN THE ARM IS MOVED OVER THE COVER FOR ENGAGEMENT WITH THE CAM SURFACE.