Alarm system having plural diverse detection means
US4319229A · kind A · utility
28Cited by
13References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1980 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Jun 9, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for detecting a fire emergency condition employs three separate and diverse sensors; a heat detector, a smoke detector, and an infrared radiation detector. Either or all of these detectors can activate the alarm. Additionally, the infrared radiation detector can be used to control the energization of the room's artificial illumination means. All sensors are mounted in a common housing and a mirror or lens arrangement is provided to focus the infrared radiation upon the appropriate detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.