Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 211
Electrics — Telepliones. 193 ai"e reflected by the reverberator r, and the microphone shown in Fig. 113. upon which rest light balls of carbon This microphone is connected with the or metal suspended principal circuit by means of wires, from hooks by silken which are broken off in the figures. … tongue maybe itself an electrode, and serve as part of tlio current-regulator, in which ease it is formed of metal, carbon, or elastic con- ductor, whether anhygroscopic or not. {Eng. Mech.) (4) Gower's Telephone is a combin- ation of a telephone and microphone in the same case, which arrangement…
Workshop recipes · Technology · Industrial arts
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