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 221
over which a lever glides like the lever of a rheostat. The evenwinding of the fine secondary wire on a long spool is usually resortea to because it allows a vari-able contact to slide easily over that part of its surface from which the insulation has been re-moved, thereby giving more accurate… … IDER C SUPER B Fig, 3,162.—Marconi type D tuner. In adjusting, the wave length of the open circuit isvaried by the sliders A and C. A closed oscillatory circuit is variably bridged aroundone of these coils, the inductance of which is varied by means of the sliding contact B.This circuit includes a…
Electrical engineering
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