Gage, Alfred P. (Alfred Payson), 1836-1903, Fessenden, C · Toronto : W.J. Gage · leaf 320
nly alocal circuit, as may be seen by reference to Fig. 2006, a singleLeclanche cell is generally sufficient to operate it. The currentsinduced by the fluctuating primary current traverse the line-wire andgenerate sonorous vibrations in the disk of the receiver in the samemanner as in the original… … § 246. Microphone. — In Figure 201, A and B are buttons ofcarbon ; the former is attached to a sounding-board of thin pine wood,the latter to a steel spring C, and both are connected in circuit with abattery and a telephone used as a receiver. The spring presses Bagainst A, and any slight jar will…
Physics
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