A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 408
a cylinder of hardened wax. Therotary motion of the cylinder i± 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 paramne. A uniformity of rotation ofthe cylinder is obtained by means of a motor…
Electricity · Electrical engineering
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