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Building alarm system with synchronized strobes

  • US 6,741,164 B1
  • Filed: 12/23/1997
  • Issued: 05/25/2004
  • Est. Priority Date: 09/24/1993
  • Status: Expired due to Term
First Claim
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1. An alarm system comprising:

  • a pair of power lines;

    at least one audible alarm powered by said power lines, the audible alarm being controlled by a change in voltage on the power lines after the audible alarm has been powered; and

    at least one visual strobe powered by said power lines, the strobe comprising;

    a flash lamp;

    a capacitor for carrying a charge to be discharged through the flash lamp; and

    a charging circuit powered from the power lines to charge the capacitor to a firing voltage level that is maintained without activating the strobe, the strobe being triggered to flash with a change in the voltage on the power lines.

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