Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 224
sthe essential part of the transmitter, and the electromagnetthe essential part of the receiver. The transmitter now in common useis illustrated in Fig. 258. At the back of the mouthpiece is ametallic diaphragm D, 5 is a carbonbutton attached to tlie diaphragm, and Banother carbon button attached… … Fig. 25S.—The microphonetransmitter used in theBell system.
Physics
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