Method and apparatus for use in cleaning a gramophone disc
US3992018A · kind A · utility
6Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Jan 31, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A combination of a turntable for playing phonograph records, a lid covering the turntable, tone arm for tracking record grooves, and a cleaning element mounted on the lid for movement into contact with a constant annular area on the top side of the record for cleaning. A counterbalance weight controls the pressure of the cleaning element upon the record.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.