Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 263
Fig. 113. The working of this telephone may be explained in thefollowing way: Many magnetic lines of force of the rodmagnet m, pass the coil, and some of them enter the diaph-ragm d, pass through it and return toward the opposite pole.When the speakers voice causes the diaphragm to vibrate,however… … Fig. 114. approaches the pole of themagnet, while less lines en-ter it when it moves away.Through this operation, thenumber of magnetic lines offorce passing through the coilis decreased when the dia-phragm approaches the poleand increased when it movesaway from it. When thesechanges occur in the…
Electrical engineering
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