Message delivery system operable in an override mode upon reception of a command signal
US4887152A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1988 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Jan 26, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4882
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information transmission system for transmitting signals from a transmitting side through a single transmission line to a plurality of terminal units. When the terminal units are interrupted by a command signal from the transmitting side, transmission of ordinary information signals to the terminal units is inhibited. When the terminal units are released from the interrupt mode, transmission of ordinary information signals automatically resumes, so that the ordinary information signals are reproduced from the point in time point at which they were interrupted. Normal operation of the terminal units is partially or totally inhibited during the interrupt mode. The system may be embodied in a passenger vehicle, in which a terminal unit is provided at each of a plurality of passenger seats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.