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Method and means for reducing false alarm rates in security systems

  • US 4,227,052 A
  • Filed: 05/18/1978
  • Issued: 10/07/1980
  • Est. Priority Date: 05/18/1978
  • Status: Expired due to Term
First Claim
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1. A security system comprising;

  • (a) a first transducer,(b) an alarm detector fed by the output of the transducer,(c) means for transmitting the alarm information to a remote site, including automatic dial equipment controlled by the alarm detector and connected to a telephone line, said transmitting means further including means to cause distant telephone receiving equipment to be activated and means for transmitting information as to the location of the (a) transducer,(d) a second transducer located in close proximity to the first transducer, and,(e) recording means fed by the second transducer, said recording means controlled to record sounds that occur at least for a period shortly before the alarm detector operates to the instant the alarm actually operates and which plays back said sounds to said remote site in response to the activation of said telephone receiving equipment for use in ascertaining the validity of the alarm.

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