Videodisc reader with longitudinally displaced turntable
US4381556A · kind A · utility
8Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1980 |
| Grant date | Apr 26, 1983 |
| Priority date | — |
| Expiry date | Dec 3, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed a device for displacing a video disk with respect to a reading head which includes the driving of a conductive disk by means of a video disk rotational motor. The conductive disk passes through the air gaps of two electromagnets located on either side of the displacement axis of a movable member supporting the rotational motor. By differentially energizing the electromagnets, a force is produced which provides for forward and backward movement of the complete movable member of the reader.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.