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 311
ed. especially when the cells are subjected to vibration, spring snapconnectors should be used as shown in fig. 3,304. For large buildings the most economical bell ringing current supply isalternating current stepped down by means of :reducers or step down 2,402 HAWKINS ELECTRICITY transformers. It… … Fig. 3,304.—Spring snap connectors and view showing connector in connecting two terminals.The use of this device insures permanent and perfect electrical connection between bat-tery cells at all times. It is placed in position by pressing the spring clips together andplacing same over the binding…
Electrical engineering
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