Stylus cleaning system for disc record player

Details Stylus cleaning system for disc record player Stylus cleaning system for disc record player

1976-03-16

1977-09-06

Wolff, John H.

Undertaking

358128, G11B 358

Patent

active

040463842

ABSTRACT:
A pickup arm, pivotally mounted at one end within an arm housing, supports a stylus at its free end. The housing is subject to translatory motion between a rest position, clear of a disc record supporting turntable, and playback positions over the turntable. A brush is mounted in proximity to the turntable and beneath the path of travel of the housing, with the bristles of the brush extending from a holder in directions substantially parallel to the direction of housing travel. As the housing reaches an intermediate position in passage toward the rest position, the pickup arm is depressed to cause stylus engagement with the brush bristles, which clean debris from the stylus during completion of the passage. At the rest position, the stylus is supported by the brush bristles at an elevation substantially corresponding to the stylus elevation obtained during disc record engagement in the course of playback. Additional cleaning is effected during housing passage from rest to intermediate position upon commencement of a playback sequence. Pickup arm elevation causes stylus retraction within housing during travel between intermediate and playback positions. A rotatable brush cleaning member, responsive to the translatory motion of the housing, causes agitation of the brush bristles during housing travel between playback and intermediate positions to remove debris from the brush.

REFERENCES:
patent: 3189351 (1965-06-01), Hathaway
patent: 3212784 (1965-10-01), Tatter et al.
patent: 3881734 (1975-05-01), Leedom

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