Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 388
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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