Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 12
ull open.This countL^racting force is supplied by the actionof the hammer itself; for, by means of the tap-pet N, (which is bolted to the hammer-block,)coming into sliding contact, when the latter israised, with the small friction-roller o, mounted on the end of a bent lever O O. the screwed rod… … HAMMER. valve e is raised, tlius cutting off all further ingress of steam under tlie piston, and almost at i,.e sameinstant permitting the escape of that ■which had served to raise the hammer. By this simple contri-vance the upward motion of the hammer is made the agent for its own control in that…
Mechanical engineering · Mechanics · Engineering
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