GB190319856A - A Pneumatic Diaphragm for Recording and Reproducing Sound in connection with Phonographs, Graphophones, and similar Machines.
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A Pneumatic Diaphragm for Recording and Reproducing Sound in connection with Phonographs, Graphophones, and similar Machines.
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Expired
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Henry Albert Seymour
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Holding Or Fastening Of Disk On Rotational Shaft
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Abstract
19,856. Seymour, H. A. Sept. 15. Phonographs, graphophones, &c.-The diaphragms of phonographs, graphophones, &c. are composed of two discs b, d of glass, mica, &c., united by an india-rubber or other elastic ring c so as to form a pneumatic chamber g. The larger disc b is attached to the sound-box h by means of an elastic ring a. The dome setting for the ball point f is attached to the centre of the smaller disc d.
GB190319856D1903-09-151903-09-15A Pneumatic Diaphragm for Recording and Reproducing Sound in connection with Phonographs, Graphophones, and similar Machines.
ExpiredGB190319856A
(en)