Turntable rotation controlling apparatus

Details Turntable rotation controlling apparatus Turntable rotation controlling apparatus

1978-09-18

1980-04-01

Shepperd, John W.

Undertaking

274 39A, G11B 300

Patent

active

041958454

ABSTRACT:
A turntable rotation controlling apparatus for use in a record player includes a logic sum gate circuit, wherein a phono-motor for rotating the turntable is driven when the gate circuit is conductive. The gate circuit is rendered conductive in response to the horizontal movement of a tone arm and/or the vertical movement thereof.

REFERENCES:
patent: 2489146 (1949-11-01), Louchheim
patent: 3111323 (1963-11-01), Zimmermann et al.
patent: 3163428 (1964-12-01), Laufer
patent: 3342499 (1967-09-01), Fukuda et al.
patent: 3550986 (1970-12-01), Takahashi
patent: 3727922 (1973-04-01), Igata

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