Practical and improved fire detector
US5691704A · kind A · utility
38Cited by
6References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Jan 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fire detector which combines an NDIR CO.sub.2 gas detector with a photoelectric smoke detector to minimize false alarms by logic means that can be integrated into a single chip that can have an ASIC section and a microprocessor section. The NDIR CO.sub.2 detector can be single or dual channel. The NDIR CO.sub.2 gas detector and the photoelectric smoke detector can be separate or combined in a single device in which they are optically isolated by a light-tight barrier but still use a common light source. Also, the CO.sub.2 and smoke detectors can be combined on a single substrate within a common housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.