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Smoke detector with performance reporting

  • US 6,838,988 B2
  • Filed: 06/26/2003
  • Issued: 01/04/2005
  • Est. Priority Date: 04/30/2003
  • Status: Expired due to Term
First Claim
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1. A smoke detector comprising a smoke detecting chamber, an operating circuit for sensing smoke particles in said chamber and producing an alarm signal when based on the sensed smoke particles;

  • said smoke detector having electrical circuitry, including a coil, used when an alarm signal is produced;

    an input receiver for initiating a test in response to a test signal being received;

    an evaluation arrangement for determining operating characteristics of said operating circuit which vary over time;

    a controller for reporting the determined operating characteristics of said smoke detector in response to a test signal being received, said controller coding a pulsed signal with said determined operating characteristics and using said coded pulsed signal to drive said electrical coil, said coded pulsed signal causing said electrical coil to produce a coded low power RF signal which includes said determined operating characteristics, said coded RF signal being receivable within a short distance of said smoke detector.

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