Video disc stylus retractor
US4256311A · kind A · utility
5Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1979 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Oct 3, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/08577
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A mechanism for retracting a stylus from engagement with the surface of a video disc record. A lever arm arranged parallel to the stylus arm and normally biased to a first position has a filament attached to a free end thereof, the filament being normally disposed to straddle and engage the stylus carrying arm proximate to the stylus to lift and hold the stylus from the record surface. A force which is selectively imparted to the lever arm pivots the lever arm to a second position permitting disengagement of the filament and stylus arm permitting the stylus to engage the record.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.