Communication control system
US4894781A · kind A · utility
43Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1987 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Oct 1, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/23032
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A plurality of control units are connected via a common signal line through which they communicate. Each control unit is operative to control an apparatus according to certain information the control unit normally receives directly through an exclusive signal line by operation of a directly-inputting device. A check is made to determine whether the directly-inputting device is operating normally. If not, then the required information is inputted from its source indirectly through another control unit by way of the common signal line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.