A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 406
a cylinder of hardened wax. Therotary motion of the cylinder is obtained by meansof an electric motor. Two diaphragms are used,one for recording, and one for reproducing thesound waves. As shown in Fig. 423, the record-ing diaphragm is in position against the cylinder.The recording diaphragm is… … Fig. 424. Bell and Tainters Graphophone.or engrave a cylinder of hardened wax. Twoseparate diaphragms are employed, one for speak-ing, and the other for hearing. The recording surface is made of a mixture ofbeeswax and paraffine. A uniformity of rotation ofthe cylinder is obtained by means of a…
Electricity · Electrical engineering
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