Stylus cleaning system for disc record player
US4046384A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1976 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Mar 16, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/5881
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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 me…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.