Vibration transmission mechanism for a phonograph

Details Vibration transmission mechanism for a phonograph Vibration transmission mechanism for a phonograph

1976-06-15

1977-12-06

Aegerter, Richard E.

Undertaking

274 1A, 274 25, G11B 300

Patent

active

040613437

ABSTRACT:
In a phonograph of the type wherein, during playback, a pickup arm travels in sliding contact with an overlying intermediate vibrator for transmission of stylus vibrations thereto, a lever is fulcrumed at its intermediate point on the intermediate vibrator. A constant force is applied to one end of the lever, as by a spring, and the other lever end is urged against a loudspeaker diaphragm rigidly supported by the phonograph casing, so that the vibrations of the intermediate vibrator are transmitted via the lever to the diaphragm to cause same to produce corresponding sound waves. Preferably, the distance between the said other end and fulcrum of the lever is at least equal to the distance between the said one end and fulcrum of the lever.

REFERENCES:
patent: 1020485 (1912-03-01), Edison
patent: 1215410 (1917-02-01), Repp
patent: 1260790 (1918-03-01), Nystrom
patent: 1408514 (1922-03-01), Johnson
patent: 2541163 (1951-02-01), Hornbostel
patent: 3589735 (1971-06-01), Watanabe
patent: 3721449 (1973-03-01), Sirinek

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