Fail-safe control circuit
US4745542A · kind A · utility
39Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1985 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Nov 12, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S303/09
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fail-safe control circuit which requires that all control units produce control signals to operate a controlled device. The control units receive a feedback signal used for comparing with the control signal. When the control signal and the feedback signal do not match, a power supply interruption or disagreement signal causes a relay to disconnect power to the controlled device placing the controlled device in a fail-safe state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.