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 374
.^) Figs. 4,345 to 4,349.—Parts of Ingersoll-Rand Imperial direct lift discharge valve and assembly.The valve proper is machined from steel and ground to seat; the projecting lip or rim abovethe seat is caught in the back lash of the compressed air when the piston stops and assiststhe spring in…
Electrical engineering
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