Fail-safe alarm circuit
US4764754A · kind A · utility
0Cited by
9References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Jul 1, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/14
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fail-safe alarm system includes a device which allows current to flow in only one direction to insure that the supervisory current in an alarm circuit is flowing in the intended direction rather than in a wrong direction caused by a miswiring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.