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 156
SHUNTFIELDCOIL t LAMPS —O— o STORAGE BATTERY huh— IRON BALLAST COIL … SHUNTFIELDCOIL t LAMPS oo STORAGE BATTERYIII IRON BALLAST COIL t Figs. 4,051 to 4,053.—Thermal method ofobtaining self-regulation in the Rushmorelighting system. As a current of constantvolume is desired, it follows that self-regulation must be produced by change inthe volume of current rather than…
Electrical engineering
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