Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 172
Fig. 3.—Wharf-crane plan. Fia. 5.—Overhead crane. 158 CRANES. and a differential raising or lowering action results, by which two men are able to hoist a loadof 5 tons. When the two barrels are coupled together, the pawl must be lifted out of theratchet-wheel of the small barrel. When a workman has…
Mechanical engineering
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