Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 390
1570. POST CRANE.—Driven by hy-draulic Hft under tlie platform. The boomswings on the post. The rope is carried upthe hollow post … 1571. WHARF CRANE, withtrussed arch jib. Pivoted to turn inany direction. Power shaft turns incrane pivot. 38o MISCELLANEOUS DEVICES.
Mechanical movements
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