Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 223
a hanger. On a level the stepsform a floor, as the end of the ladder falls withthe tide the hangers lift the forward edgeof the step to keep it level. The shore postsare fixed and vertical. Stringers are pivotedto posts. 814. SCREW ANCHOR for buoys. Is screwedto the required depth in the sand by a… … 8i6. STONE DRY-DOCK, intowhich vessels are floated and a watergate closed, when, by pumping the waterout, the vessel settles upon bearingblocks, and is shored from the side walls. .^F^^^^^T^^^n^w 817. FLOATING DRY-DOCK, inwhich the lifting power is derived fromthe displacement of the water in…
Mechanical movements
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