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 379
it being fixed in the center only. When the piston passes thedead center on the return stroke, the valve closes. The function of the cushion plate is toact as a buffer, absorbing any shock that might otherwise fall on the valve, thus prolongingthe life of the valve and reducing the noise. AIR… … Fig. 4,376.—Ingersoll-Rand Imperial type, compound or two stage duplex belt driven air com-pressor with underneath intercooler. The cranks are at 90°, thus giving the advantages ofstress reduction, and nearer uniform effort inherent in this sequence of crank. Ques. Describe the cycle of compound…
Electrical engineering
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