Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 321
ad. Lift Pumps.—Figs. 4,251 to 4,253 show the essentials andworking principle of a simple lift pump. In construction there are two valves in this type of pump, whichare known as the foot valve and the bucket valve. In operationduring the up stroke the bucket valve is closed and foot valve… … valve opens,which transfersthe water in thecylinder fromthe lower sideof the piston tothe upper sideas in fig. 4,252. During thenext up stroke,the water, al-ready trans-ferred to theupper side ofthe piston, isdischargedthrough theoutlet as in fig.4,253. It will benoted that asthe pistonbegins the…
Electrical engineering
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