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 643
e other. When the shaftchanges its direction, a secondpump-rod is attached to thefirst by means of a Y-bob, asshown in Fig. 3540. A A arepins for connection with firstrod; B, bearing for secondrod; C, fulcrum. The line AC is horizontal when at centreof motion.Fig. 3541 represents a Cornish pump on… … PUMPS. 613 strokes per minute. Its steam-valve arrangement is the same as on the Knowles steam-pump (secPumps, Steam), but it can be made single-acting by shutting off the steam from one end of thecylinder. Vacuum-Pumps.—Pumps of this variety, in which the steam and water are in direct contact…
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