Bearing arrangement for a record player tonearm
US4170361A · kind A · utility
3Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1978 |
| Grant date | Oct 9, 1979 |
| Priority date | — |
| Expiry date | May 2, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/32
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The disclosed arrangement is for a short pickup arm used with a tangential scanning system. The arm is supported on a single jewel thrust bearing and held against sideways tilting by a pair of attracting magnets, one mounted on the arm above the bearing and the other fixed above the first. This permits the arm to move freely in a plane parallel to the record and in a plane perpendicular to the record and tangent to the grooves. The center of gravity of the arm is chosen to be on a line between the bearing point and the stylus point in order to minimize the effects of outside disturbances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.