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 323
PLUNGER zpS=«S5S^ Hum DISCHARGEVALVE \. CLOSED … FlGS. 4,257 and 4,258.—Elementary single acting plunger pump showing essential parts. Thedistinction between a plunger and a piston should be carefully noted. In operation, during the up stroke, atmospheric pressure forces waterinto the cylinder as in rig. 4,254; during the down stroke this water…
Electrical engineering
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