The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 382
f the points. The blocks are carriedon a standard and base D. The blocks are connected with two ter-minals X, y, of a circuit, including a telephone and battery. Thereare two contacts to be disturbed. If delicately adjusted a fly walking over the base-board will dis-turb the contacts enough to… … Fig. 242. Microphone. Microphone Relay. A combined microphone and telephone.A microphone is placed close to the diaphragm of a telephone.The slight sound waves emitted by the telephone affect the micro-phone and are repeated in its circuit. The microphone circuitincludes a local battery and…
Electricity
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