Method and apparatus for the prevention of fast-forwarding of a video cassette tape
US5005099A · kind A · utility
28Cited by
1References
4Claims
0Family size
Inventors
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to a method and apparatus for preventing the fast-forwarding of a video tape cassette through a commercial advertisement recorded at the beginning of the tape. The methods disclosed make use of the standard photoelectric circuitry normally built into a video cassette recorder for sensing the transparent ends of a tape and stopping the recorder. Actuation of the standard stop circuitry may be accomplished by adding an auxiliary light source and associated operating circuitry to illuminate the photocell thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.