| 摘要 |
A power and free conveyor has trolleys driven along a fixed track by abutments on the trolleys being engaged by dogs depending from an endless drive chain. At a station, a stop is spring-biassed into an operative position in which it depresses the abutment of a trolley out of the path of the dogs. A bellcrank lever has one arm which can be moved into that path. When a dog turns the one arm, the other arm retracts the stop, and the dog then moves the trolley from the station. Thereupon, the trolley releases a latch which holds the stop retracted, so that the stop returns to its operative position.
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