Tangential tracking tonearm
US4153256A · kind A · utility
8Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1977 |
| Grant date | May 8, 1979 |
| Priority date | — |
| Expiry date | Nov 25, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/121
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tonearm system is provided in accordance with the invention in which the tonearm is mechanically maintained in tangential tracking relationship in the groove in a record during the playing thereof, the record being mounted on a rotating turntable. The principle of the mechanical system according to the invention is to provide the tonearm in fixed relationship with a bracket combination capable of pivoting the tonearm horizontally on a vertical axis which bracket in turn is adapted to rotate about a secondary vertical pivotal axis, this axis being in fixed relationship to the axis of the turntable and the record being played.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.