A piece of mechanism, working on the principle of the wheel and axle, on a vertical axis, the power being applied by movable bars or levers inserted in horizontal sockets made round the top, and pushed by men walking round, whereby the apparatus is made to revolve and wind up a cable round its cylinder or barrel; it is used especially on board ship for weighing the anchor, also for hoisting heavy sails, etc., and for raising weights out of quarries, mines, coal-pits (see gin n.1), and the like.

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