Dual drive system for phono pickup arm
US4580257A · kind A · utility
0Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1983 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Jan 17, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B3/0957
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dual drive system for an automatic record player of a type in which programmed music selection can be carried out. The drive system includes a mechanical first drive system for mechanically driving the pickup arm and an electromagnetic second drive system for driving the pickup arm using an electromagnetic force. Circuitry is provided for selecting between the two drive systems in accordance with the selected operational mode of the player or the position of the pickup arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.