Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 390
1569. PACKAGE ELEVATOR, for con-tinuous service up or down without reversing.May be arranged for self-dumping both ways, … 1570. POST CRANE.—Driven by hy-draulic lift under the platform. The boomswings on the post. The rope is carried upthe hollow post.
Mechanical movements
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