Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 566
thesmall engine i?, so that the jaws f f rest upon the shoulders of the pile, which sinks down into theground by the effect of the superincumbent weight, till it has reached soil sufficiently firm to supportit; this is indicated by the chain c c becoming slack. The pinion y is then thrown out of… … the valve £ to assume a position which allows the steam which had served to raise the hammer toblow out into the air, and the hammer descends and discharges its momentum in the form of anenergetic blow on the head of the pile. During the descent of the hammer-block, the steam-valveis retained in…
Mechanical engineering -- Dictionaries
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