Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms
US8754775B2 · kind B2 · utility
10Cited by
74References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2010 |
| Grant date | Jun 17, 2014 |
| Priority date | — |
| Expiry date | May 4, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/185
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A smoke alarm comprises smoke detection circuitry for detecting smoke and generating a detection signal responsive thereto. Proximity detection circuitry generates a proximity detection signal responsive to detection of an object within in a selected distance of the smoke alarm. Alarm generation circuitry generates an audible alarm responsive to the detection signal. The audible alarm may be deactivated for a predetermined period of time responsive to at least one proximity detection signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.