Disc-record players

Details Disc-record players Disc-record players

1976-10-27

1978-02-28

Stephan, Steven L.

Undertaking

G11B 310

Patent

active

040762580

ABSTRACT:
An anti-skating device for a disc-record player comprises two permament-magnet plates carried by the pickup-arm support and each extending over a sector of a circle round the same, the plates being magnetized, each across its thickness, with opposite polarities to produce each a magnetic flux at right angles to the direction of plate movement, and a coil fixed to the player structure in which two conductor elements extend across the flux of each magnet plate respectively, transversely to the direction of magnet movement, and carry the coil current in opposite directions.
Current cut-off means are preferably provided to allow the winding to be de-energized when, particularly during a cueing operation, the pickup stylus is lifted from the record surface.

REFERENCES:
patent: 3292935 (1966-12-01), Cooper
patent: 3731938 (1973-05-01), Wren
patent: 3779563 (1973-12-01), Irisawa

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