Composite temperature and smoke alarm device and equipped smoke sensor therein
US9092959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2012 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Jun 7, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Disclosed is a multipurpose alarm apparatus which includes a smoke sensing unit configured to sense a smoke using a first sensor and a second sensor, each of the first and second sensors including a temperature-sensitive smoke sensor portion disposed between a first electrode and a second electrode; a smoke level measuring unit configured to generate a smoke level measurement signal by comparing a difference between first and second smoke detection signals from the first and second sensors with a reference signal; and a sensing control unit configured to generate a fire alarm signal when the smoke level measurement signal corresponds to a fire generation condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.