Abstract: A door locking mechanism for a hopper door includes a latch arrangement which is incorporated into a door closure mechanism activated by a side-of-track camming mechanism. The arrangement includes an actuating device responsive to car wheel engagement and a safety locking combination cooperating with the actuating mechanism.

Abstract: A door locking mechanism for a railway hopper car includes a rotatable latch or rotor member engaging a keeper on the door for releasably locking the same. The latch member includes abutment faces which are engaged in locking position by a spring loaded lever. The lever includes a flat surface engaging a rounded cam surface on the rotor for positioning the same in a release position.

Abstract: The side discharge doors of a railway hopper car are maintained in a closed and locked position by a rotatable latch element which is engaged by a stop and lock member. The stop and lock member is connected to a linkage rigging arrangement which is moved by a ground actuated operating and tripping mechanism. The tripping mechanism includes a cam actuated arm which by linkage means transmits vertical movement to horizontal movement of the linkage rigging which actuates the latch and locking members of the doors.

Abstract: A railway hopper car includes laterally positioned bottom dump discharge openings and doors which are locked in a closed position by a latching mechanism actuated from a ground-mounted trip lever. After the car has been dumped it is moved adjacent to a ground-mounted cam which is engaged by cam followers on the doors thereby swinging the doors again to the closed position.

Abstract: A bottom dump hopper car includes a pair of closure doors interconnected for conjoint movement. One of the doors is provided with a pivoted arm extending toward the center sill and is in operative engagement with a pivoted locking latch. The latch includes a stop and a follower element and is pivotally moved between door opening and closing position by means of a reciprocating actuation rod containing a cam element engagable with the follower element.

Abstract: A static switching apparatus for a track vehicle includes a main line track and a switch track which at a switching junction both include a conventional track rail and a specially constructed rail. A switching cam including cam faces is positioned at the junction and includes straight and curved cam surfaces which are selectively engaged by cam followers supported on the vehicle to provide for steering of the vehicle. The cam followers are lowered and raised vertically by fluid extensible devices which also move them in an orbital path into cam surface engagement.

Abstract: A hopper car door locking mechanism includes a rotatable latch member which includes a keeper receiving portion. The latch member also includes a positioning portion providing stops which are engaged by a rotatable locking pawl in the closed position of the hopper car door. The rotatable locking pawl includes a cam device which is pivoted in response to reciprocating movement of a rod having a suitable cam surface. The rod also includes a stop device which with the rotatable latch member provides a second stop which therefore provides for double locking of the door.

Abstract: A railway car includes a chassis supported on two sub-frames which are relatively pivotally movable. The sub-frames support propulsion motors, differentials, and driven flanged wheels. And intermediate steering axle and wheel assembly are transversly movable in response to track curvature and a steering beam extending outwardly from the steering axle pivots the sub-frames for steering movement.

Abstract: A cable drive mechanism for opening and closing a sliding box car door includes a high friction drive pulley carrying a cable which is anchored at opposite ends to the sides of the box car and a low friction guide pulley which is in aligning relation to the drive pulley. The drive pulley is manually rotated for sliding the box car door between open and closed positions.