Simplified phonograph

Details Simplified phonograph Simplified phonograph

1975-07-08

1976-11-16

Aegerter, Richard E.

Undertaking

181161, 274 33, G11B 302, G10K 1300, G10K 1114, A63H 333

Patent

active

039920160

ABSTRACT:
A phonograph wherein the vibrations set up by a record groove in a reproducing stylus on a tone arm are transmitted, without conversion into electric signals, to a diaphragm overlying the tone arm. Arranged between the tone arm and diaphragm is an intermediate vibrator which has a vibrator rod extending upwardly therefrom. The diaphragm is conical in shape, is secured to the phonograph casing at the periphery of its base, and has an aperture at its vertex to receive the vibrator rod with clearance. The intermediate vibrator is spring biased into contact with the tone arm, and the vibrator rod also spring biased into contact with the edge of the diaphragm bounding the aperture. This aperture can be reinforced with a hollow member which will receive the vibrator rod with clearance.

REFERENCES:
patent: 2164663 (1939-07-01), Ottofr
patent: 3095201 (1963-06-01), Ryan
patent: 3589735 (1971-06-01), Watanabe
patent: 3633923 (1972-01-01), Watanabe
patent: 3773331 (1973-11-01), Watanabe

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