Building alarm system with synchronized strobes
US5886620A · kind A · utility
19Cited by
31References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1996 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | Jul 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a building fire alarm system, the light strobes of a network of strobes are synchronized to flash simultaneously. Each strobe has a charging circuit to charge a capacitor which discharges through a flash tube. Once a capacitor is charged, the charging circuit is disabled. A synchronization pulse is applied through common power lines to trigger discharge of each strobe capacitor through the flash tube followed by recharging of the capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.