Hardwired alarm system with power-on sequence
US7825817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2006 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Oct 10, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/181
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A sensor and alarm system having a power-on sequence. The system has a power supply permanently-like connected to a power line of a facility. There may be a power interrupt to the power supply, which may initiate a power-on sequence of alarms. The sequence of alarms may indicate whether the system is wired properly and operating normally. If the sequence does not occur in a pattern as expected, then there may be a problem with the system. Also, the sensor portion of the system may set off an alarm pattern if a sensed gas has a concentration greater than a first magnitude. The system may set off another alarm pattern if a sensed gas has a concentration greater than a second magnitude. If a sensing element of the sensor portion goes out of calibration, then the system may set off still another alarm pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.