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Alarm system

  • US 5,235,320 A
  • Filed: 12/03/1991
  • Issued: 08/10/1993
  • Est. Priority Date: 06/12/1989
  • Status: Expired due to Fees
First Claim
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1. A method of providing personnel security comprising:

  • assigning a unique code to each of a plurality of receivers;

    visually indicating a unique n-digit location code corresponding to each of said receivers;

    entering a desired unique code from the n-digit visual indicator located proximately to a portable transmitter into said portable transmitter;

    sending said entered unique signal by manual operation of a pushbutton on said portable transmitter;

    receiving said entered unique signal by its corresponding receiver having a code identical to said entered unique signal;

    annunciating an alarm located proximately to said corresponding receiver;

    sending a signal to summon help from said corresponding receiver to a remote central station; and

    resetting said portable transmitter after responding to said alarm signal and determining said signal to be genuine and not a decoy or spurious alarm signal, so that such transmitter can again be used for entering a further desired unique code from another n-digit visual indicator for transmission of said further desired unique signal to another of said plurality of receivers having a unique code identical to said further desired unique signal.

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