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 623
594 PUMPING ENGINES. friction-clutch is thrown into gear again, changing the cut-off, so as to maintain the water-pressureconstant. It will be seen that the cut-off is regulated by positive gear driven by the engine, and theonly work required of the regulator is to connect or disconnect this gear.… … nected, and throws the cut-off to zero instantly if this is requisite. A regulator, it is scarcely neces-sary to say, is an essential feature of a direct pumping system in which the supply constantly varies.The Leavitt Pumping Engine is the design of Mr. E. D. Leavitt, Jr., C. E., of Cambridgeport,…
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