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 262
magnet m, around which, fine wire was wound anda Diaphragm or disk d, made of thin iron and placed in thefield of the magnet. Each apparatus was provided with aspecial mouthpiece, of such a shape as to gather the largestpossible amount of sound and concentrate it upon thediaphragm. There was no… … 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…
Electrical engineering
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