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 273
essitate the use of a condenser to prevent sparking at the interrup-ter. An elementary diagram of a heavy duty high pressure bell, em-bodying the features just described is shown in fig. 3,230. Figs. 3,231 to 3,233 show the action of the condenser in preventingsparking, and figs. 3,234 to 3,237, a… … K—HIGH PRE5SURE LOW*- * PRESSURE MODERATE D1FFLREMCE0FPRE55URE
Electrical engineering
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