Fire alarm system, sensor and method
US4871999A · kind A · utility
72Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1987 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | May 18, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fire alarm system, sensor and method for determining a fire by detecting a change in a temperature, smoke density and/or gas concentration due to a fire. The detection data values of the respective analog sensors are corrected based on areas of supervisory regions of the respective analog sensors which are defined by walls, beams or inwardly extending projections surrounding the respective analog sensors, and/or heights from the floor of the respective analog sensors. The fire determination is carried out based on the corrected data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.