A history of the growth of the steam-engine (1878)
Thurston, Robert Henry, 1839-1903 · New York, D. Appleton · leaf 231
dle, L, and the link,n, and its connections, including the counterweighted bell- 206 THE MODERN STEAM-ENGINE. crank, M, this link could be raised or depressed, thusbringing the pin on the link-block, to which the valve-stem was connected, into action with either eccentric. Or,the link being set in… … Fio. 5S.—The Stephenson Valve-Gear, 1833. catch on L could be dropped, enabled the driver to placethe link where he chose. In intermediate positions, be-tween mid-gear and full-gear, the motion of the valve issuch as to produce expansion of the steam, and some gainin economy of working, although…
Steam-engines
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