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 375
at of compression, as al-ready explained, represents work done upon the air for which there is AIR COMPRESSORS 3,029 usually no equivalent obtained, since the heat is all lost by-radiation, before the air is used. Simple Compression.—In the earlier compressors, compres-sion was accomplished in one… … Fig. 4,353.—Ingersoll-Rand air cylinder with hurricane inlet valves. The spray injection cylinder has now given way almostentirely in this country to the dry or jacketed cylinder. Ques. What are the features of the spray injectionprocess? Ans. A higher thermal efficiency may be attained than bythe…
Electrical engineering
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