Repeater for smoke and similar alarms
US4189720A · kind A · utility
25Cited by
2References
4Claims
0Family size
Inventor
Key dates
| Filing date | Oct 7, 1977 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Oct 7, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A repeater is provided for a smoke alarm or similar alarm device which picks up the sound from the alarm device and transmits a coded radio signal to a receiver at a remote location. This receiver includes an integrator set for some convenient time interval to prevent false triggering. In accordance with a preferred embodiment of the invention, the receiver may incorporate a location indicator and be used with a plurality of transmitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.