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 175
discharged through one of the coils it would induce an electriccurrent in the other, provided there was a spark gap in the first orinducing coil. This accidental discovery led to subsequent experiments,in the performance of which he perfected the oscillator and detectorapparatus shown in fig.… … Fig. 3,104.—Hertz standard oscillator and resonator or detector. It consisted of a powerfulinduction coil A, a battery B, an interrupter or telegraph key C, an oscillator D, anda resonator or detector E. The oscillator consisted of a pair of brass rod F, F, terminat-ing in two highly polished brass…
Electrical engineering
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