(under subclass 87) Linear cable hoists of the draft-rope, hoist-rope type, comprising a track, a carriage thereon, and a hoist-rope consisting of two sections, one extending toward each end of the track, which serves to traverse the load in both directions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89, for similar devices in which the hoist-rope is arranged to positively lower the hook or block.