Equipment for playing gramophone records and method of operation

Dynamic information storage or retrieval – Dynamic mechanism subsystem – Specified detail of transducer assembly support structure

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Details

G11B 338

Patent

active

043441688

ABSTRACT:
Equipment for playing gramophone records, and a method of operating same to reduce or eliminate so-called lateral tracking error comprising a turntable deck (10), a rotatable turntable (11) thereon, a tone arm (12, 20, 21) pivotally mounted on the deck and carrying a stylus for tracking across a record placed on the turntable, the tone arm being afforded a component of linear forwards movement during operation in combination with the angular inwards movement of the stylus towards the center of the turntable, there being a guidance system (15, 16, 26, 28, 33, 34) to determine and control movement of the tone arm whereby, in use, the longitudinal center line of the stylus maintains alignment with a tangent to the record groove at the point of stylus contact therewith.

REFERENCES:
patent: 2006605 (1935-07-01), Putnoky
patent: 2585396 (1952-02-01), Martin
patent: 2966360 (1960-12-01), Herve
patent: 3059934 (1962-10-01), Urmenyi
patent: 3313546 (1967-04-01), Yushikawa
patent: 3485501 (1969-12-01), Baker
patent: 3826505 (1974-07-01), Birch
patent: 3924860 (1975-12-01), Saito
patent: 4153256 (1979-05-01), Guha

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