Phonograph for use with record cartridges

Details Phonograph for use with record cartridges Phonograph for use with record cartridges

1977-04-14

1978-10-31

Stephan, Steven L.

Undertaking

274 9C, G11B 340, G11B 304

Patent

active

041230655

ABSTRACT:
A phonograph for use with a record cartridge wherein a disc record is attached to a sheet-like record holder, comprises a cartridge holder mounted on a casing for immovably holding the record cartridge with its record facing downwardly. Within the casing, a motor-driven turntable is rotatably mounted under the cartridge holder, and a speaker cone is mounted further under the turntable in concentric, back-to-back relationship for simultaneous rotation therewith. A tone arm pivoted eccentrically on the turntable has a reproducing stylus extending upwardly therefrom for engagement with a record groove of the record cartridge. The vibrations set up in the reproducing stylus during rotation of the turntable relative to the record cartridge are transmitted to the speaker cone via a vibration transmitter rod mounted on the turntable.

REFERENCES:
patent: 3648385 (1972-03-01), Barlow et al.
patent: 3740056 (1973-06-01), Nuttall et al.
patent: 3773331 (1973-11-01), Watanabe
patent: 3811686 (1974-05-01), Watanabe
patent: 3825268 (1974-07-01), Holland et al.

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