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 228
o glow by storage battery current controlled by a rheo-stat, and the incandescent filament liberates gaseous ions. If,by throwing the switch, oscillating electricity be made to surgethrough the valve tuner or receiving transformer, the currentis rectified and the disturbed ions are detected by the… … Fig. 3,172.—Combination galena detector. This detector is used in case a quick change isnecessary. If one of the points of this detector happen to be knocked out of adjustmentby static or other means, the other detector can be easily thrown in the circuit by makinguse of the two point switch. The…
Electrical engineering
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