Tubular player arm for an optical recording and reproducing device with drive coil and tachogenerator coil on other end
US3969574A · kind A · utility
8Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1974 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Apr 29, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/034
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for writing information in a disk-shaped record carrier, and/or for reproducing the recorded information, the transducer being radially movable relative to the record carrier, which transducer is disposed on a tubular member, which at its one end is provided with a drive coil and at its other end with a tachometer coil, which coils are movable in an air gap of a stationary magnet system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.