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 103
on the line, a trouble hunter will locate it in thesubscribers telephone set. If the trouble be inside, the exchange tests should then be madefor opens and short circuits by throwing the key of the test set markedS and the key marked V. If the circuit be open, the voltmeterwill show no deflection,… … Figs. 3,043 and 3,044.—Master station dictograph and substation dictograph. A head receiveris shown at the master station which may or may not be used. The opening to the rightis in reality the funnel or horn which allows the sound of the interior receiver to be heardwithout the use of the head…
Electrical engineering
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