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Smoke detector having variable level sensitivity

DC
  • US RE33,920 E
  • Filed: 07/11/1989
  • Issued: 05/12/1992
  • Est. Priority Date: 03/05/1987
  • Status: Expired due to Term
First Claim
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1. A smoke detector comprising:

  • means for sensing smoke levels and generating a signal .[.charcteristic.]. .Iadd.characteristic .Iaddend.of said smoke levels;

    means for generating an alarm signal responsive to said sensing means detecting a predetermined smoke level;

    means for user testing the operability of said smoke detector, said testing means comprising a single user .[.actuaed.]. .Iadd.actuated .Iaddend.element adapted to cause generation of said alarm signal; and

    means for temporarily diminishing the sensitivity of said smoke detector by increasing in said sensing means the magnitude of said predetermined smoke level causing generation of said alarm signal, said single user element further adapted to actuate said diminishing means.

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