Fire sensor
US5376924A · kind A · utility
25Cited by
6References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1992 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Sep 24, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/002
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fire sensing method and apparatus for detecting a fire based on the detection of a hydrocarbon gas produced before fire ignition and the detection of a second fire indicating phenomenon. Such other phenomenon may comprise the detection of temperature, radiation or combustion product gases. The detection of hydrocarbon gas may generate a pre-alarm condition which permits the use of higher sensitivity conditions for the second fire indicating phenomenon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.