Videodisc player with drive means engaging videodisc guide groove
US4260858A · kind A · utility
Inventor
Key dates
| Filing date | Jun 26, 1978 |
| Grant date | Apr 7, 1981 |
| Priority date | — |
| Expiry date | Jun 26, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosure is directed to a system for storing and reproducing analog or digital information, such as television information. There is provided a recording disk having a mechanical guiding track formed in a spiral or circular pattern on a surface thereof. A signal recovery device is provided and includes mechanical tracking means to effect guiding along the mechanical guiding track of the disk. The signal recovery subsystem also includes an optical scanning means for scanning the optical records. In the preferred embodiment of the invention, the signal recovery device includes mechanical driving means, synchronized with the optical scanning means, for engaging the guiding track and causing motion of the disk with respect to the signal recovery device. The disk is preferably mounted on a passive turntable, and rotation of the disk and turntable is achieved by the mechanical driving means of the signal recovery device acting directly on the disk. Since the mechanical driving means is synchronized with the optical scanning means, proper tracking is achieved, and this is done without the need for complicated servomechanisms as would be needed for precise independent direct driving …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.