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Apparatus for remotely monitoring controllable devices

  • US 5,764,159 A
  • Filed: 08/02/1996
  • Issued: 06/09/1998
  • Est. Priority Date: 02/16/1994
  • Status: Expired due to Fees
First Claim
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1. A remotely monitored installation comprising:

  • a plurality of controllable equipment, each of said equipment including control means activated in response to a control information sequence, said control information including information concerning duration of operation, said control means comprising means for transmitting the sequence of control information for controlling the operation; and

    a portable control device held by a person responsible for controlling said equipment by inputting at least said control information sequence, said portable control device comprising;

    memorizing means;

    means for receiving said sequence of control information from said equipment and for storing at least a portion of said sequence of control information in said memorizing means, whereby at least a portion of the control information relating to each of said equipment in association with information identifying said equipment are memorized, said memorized information including at least the information representative of the operating duration of said equipment;

    means for generating time information;

    means for initializing the time information to a time base related to each of said equipment being controlled, thereby obtaining elapsed time information measured from the initial time base;

    means for comparing said operating duration with the elapsed time information; and

    means for issuing an alarm signal as a function of the result of said comparison.

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