Great facts : a popular history and description of the most remarkable inventions during the present century (1860)
Bakewell, Frederick C. (Frederick Collier), 1800-1869 · New York, D. Appleton and company · leaf 319
e of it is brought to bear, isequal to five tons and a half. The force of the blowof the hammer, when falling from its greatest height,is equal to IM tons. By the arrangements of levers, screws, and pipesand valves, shown in the engraving, the steam is first SELF-ACTING ENGINES. 303 admitted under… … lever, which then shuts off the steam, and allows it toescape ; whereupon the hammer falls with its fullforce vertically on the anvil. The end of the lever 304 GEEAT FACTS. which turns off the steam may be adjusted at anyheight, according to the required force of the blow, sothat the hammer may…
Inventions
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