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Base station for monitoring call boxes

  • US 4,406,995 A
  • Filed: 05/12/1981
  • Issued: 09/27/1983
  • Est. Priority Date: 05/12/1981
  • Status: Expired due to Fees
First Claim
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1. In a base station for monitoring the status of several function conditions at remote call boxes, each of which is assigned a distinctive identification code and is capable of selectively transmitting a message in the form of a plurality of successive signals upon a change in a function condition, several of said signals being representative of a box identification code and at least one of said signals being a code representative of the changed function condition, said base station having means for decoding said message, the improvement comprising:

  • said decoding means including means for creating a particular one of a plurality of output selector signals upon decoding of a given box idenfication code in a message being processed;

    means for creating a particular output function signal in response to said coded representation of said message being processed;

    means for directing said output function signal in parallel to a plurality of output matrixes each of which has a particular exhibited function indicia controlled by said output function signal when said matrix is energized and means for energizing a selected one of said matrixes by the created output selector signal.

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