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 60
connection with an attendant operators idle cord circuit in anyposition of the switchboard. Fig. 2,968 shows the system of wiring connectors or selectors at thecentral office. The lever consists of double blades and the lines shownrepresent double line wires. When the attendant operator learnsthe… … ARMATURE C0N&IN5LI?- n ARMATURE ( O Btll C0IL5 -TRUNK HOLDlNbCOIL
Electrical engineering
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