Pivoted arm control arrangements
US4023130A · kind A · utility
8Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1975 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Apr 24, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/125
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The vertical movement of a phonograph pick-up arm is controlled magnetically or electro-magnetically by means including a body of magnetic material attached to the arm and magnetic field producing means arranged to exert a force on the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.