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 162
eiver across the terminals of any open instrumentor fuse the circuit is temporarily completed and the diaphragm willclick sharply. THE TELEGRAPH 2,255 Printing or Typewriting Telegraphy.—In 1837 AlfredVail, an associate of Morse, made elaborate and detailed workingdrawings of his proposed printing… … Fig. 3,095.—Circuit diagram of the Western Union proportional test set for the use of line-men and cable testers. This set consists of a simplified rheostat, a galvanometer and abattery contained in a box 7X9X5 inches in size. The component parts of the appar-atus, with their connections, are here…
Electrical engineering
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