| 摘要 |
A lock for a railway hopper car having a hinged door. The lock comprises a pivotable eccentric member to which is pivotably and eccentrically mounted at latch which engages a lug to hold the car door either loosely or tightly closed. The lug is mounted on the door and loosely engages the latch, which is on the door frame, when the door is swung out. Cam surfaces on the latch and lug cause engagement of the latch and lug. The eccentric member can be rotated to draw the door tightly closed. Rotation of the eccentric member engages the latch in a tightly locked, over-center position on the lug, and the latch and eccentric member can be held in the tightly locked position by a pivotable cam lock. Rotation of the eccentric member in the opposite direction disengages the latch from the tightly locked position and further rotation of the eccentric member causes projections on that member and on the latch to abut so as to lift the latch out of engagement with the lug to permit the door to open fully.
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