| 摘要 |
An automatic device for locking and unlocking a hopper car door operating lever mechanism. This device, which prevents unintentional opening of hopper doors and includes pivoted and connected spaced locking members connected by an operating bar, is locked onto the door operating drive lever and is removed automatically from the levers on actuation of the door opening air cylinder when a cammed portion of the air cylinder ram contacts and lifts the operating bar thus allowing operation of the door operating mechanism.
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