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 29
It employs asemi-circular magnet, like a bell watch case receiver magnet, each pole ofwhich carries a soft piece of iron on which the coils are wound. Thesesoft iron magnet cores are fastened by screws to the steel magnet ends. 2,122 HAWKINS ELECTRICITY The Watch Case or Head Receiver.—This type is… … -RECEIVER HOOKTRANSMITTER RECEIVERCORD
Electrical engineering
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