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Building alarm system with synchronized strobes

  • US 20040104811A1
  • Filed: 11/21/2003
  • Published: 06/03/2004
  • Est. Priority Date: 09/24/1993
  • Status: Active Grant
First Claim
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1. A method of synchronizing audible alarms and visual strobes comprising:

  • connecting the audible alarms and visual strobes to common power lines and applying power to the audible alarms and visual strobes through the common power lines; and

    after the audible alarms and visual strobes have been powered, repeatedly changing the voltage on the power lines to control timing of the audible alarms and visual strobes.

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