Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 28
aphragm fastened a small » Vol. XXIV., Llllustration, Paris, Aug. 26, 1864. 6 AMERICAN TELEPHONE PRACTICE. piece of platinum, F- Near this he mounted a heavy brass spring,s, with which the platinum alternately made and broke contact whenthe diaphragm was caused to vibrate. These contact points… … FIGS. 6 AND 7.-REIS TELEPHONE TRANSMITTER AND RECEIVER. wire and mounted on a cigar box for a sounding board. Its opera-tion was as follows: The sound waves set up in the air struck againstthe diaphragm of the transmitter, causing it to vibrate in unison withthem. This caused the alternate making…
Telephone
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