Communications: electrical – Systems – Signal light systems
Reexamination Certificate
2006-02-28
2006-02-28
Swarthout, Brent A. (Department: 2636)
Communications: electrical
Systems
Signal light systems
C315S24100S, C340S286050, C340S286110, C340S331000
Reexamination Certificate
active
07005971
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.
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Stanley Lawrence G.
Stewart Albert J.
ADT Services AG
Swarthout Brent A.
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