Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 309
1210. HORSE-POWER HOIST-ING DRUM, double speed. Thespeed is changed by dropping oneor the other driving gear by the le-vers. A release for running back ismade by turning the crank whichdisengages the gear clutch. … 1211. STEAM HOISTING ENGINE, with flat chain drum and reversing link.The flat chain winds upon itself on anarrow drum. MINING. 3or
Mechanical movements
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