(under subclass 94) Draft-rope systems of the type comprising some means other than the weight of the parts themselves for lowering the end of the hoisting cable or for lowering the fall-block at the loading or unloading point.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89, for similar devices in which the trolley is moved in one direction by the hoisting cable.
99, for similar devices comprising a traveling drum, an endless cable for operating the drum, and a clutch between the cable and drum.
