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 217
the receiver in series with the circuit.Two or more receivers or receiver cords are connected in parallelat the telephone posts so that several pairs may be used. Thebattery current is also variable and its object with the poten-tiometer is to increase the sensitiveness of the carborundumcrystal.… … Fig. 3,156.—Mesco receiving tuning coil. In construction, the coils are wound with blackenameled wire and are properly designed for the use of such wire. The sliding contactmaintains • connection with the wire of the coil. Adapted for wave lengths from zeroto 1.500 meters. Tuned Receiving…
Electrical engineering
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