Apparatus and method for synchronizing visual/audible alarm units in an alarm system
US6194994A · kind A · utility
14Cited by
8References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Sep 15, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B7/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An apparatus and concomitant method of reducing the number of synchronization pulses transmitted to the alarm units for increasing the reliability of the overall alarm system is disclosed. The synchronization signal is implemented as a reference or reset signal from which the alarm units derive a reference time to begin activation of the alarm units. Thus, when an alarm unit receives a reference synchronization pulse, the alarm unit applies the reference synchronization pulse as a reference point in time to trigger a series of flashes or audio tones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.