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 346
Fig. 4,298.—Transparent view of Taber rotary pump showing all parts. It consists of acircular barrel containing four vanes or valves projecting through slots of a cylindereccentric to the circular barrel, and arranged to move in or out to maintain contact withthe interior surface of the circular… … *S?.-,_. Fig. 4,299.—Deming rotary force pump designed to meet the demand for pumps for pumpingsmall quantities of oil or gasoline. It is also recommended for pumping water for housesupply or other purposes where power is available, and the liquid is entirely free fromgritty substances. It is…
Electrical engineering
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