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 696
the playof this valve that renders the machine self-acting. To accomplish this, the valve is made of or loadedwith such a weight as just to open when the water in B is at rest; i. e., it must be so heavy as toovercome the pressure against its under side when closed, as represented in Fig. 3664. Now…
Mechanical engineering -- Dictionaries
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