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Wireless activation of multiple alarm devices upon triggering of a single device

  • US 6,028,513 A
  • Filed: 02/27/1998
  • Issued: 02/22/2000
  • Est. Priority Date: 02/27/1998
  • Status: Expired due to Term
First Claim
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1. In an alarm system comprising a plurality of wireless alarm emitting devices in wireless communication with a central control unit, each of said wireless alarm emitting devices operating at a duty cycle of less than one hundred percent, the duty cycle comprising an active period and an inactive period, a method of activating the wireless alarm emitting devices to perform an output function synchronously with each other comprising the steps of:

  • transmitting data comprising synchronization data from a central control unit;

    receiving the transmitted data at each of the alarm emitting devices; and

    in response to the synchronization data, each of the alarm emitting devices synchronously performing an output function.

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