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Solid-state electrical-power demand register and method

  • US 4,509,128 A
  • Filed: 04/16/1982
  • Issued: 04/02/1985
  • Est. Priority Date: 04/16/1982
  • Status: Expired due to Term
First Claim
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1. A register for monitoring electrical-power demand made upon alternating current mains, comprising:

  • (a) means, responsive to power consumed from said mains, for computing values of electrical-power demand over a succession of demand-monitoring intervals, said computing means including;

    (i) sensing means for providing pulses at a rate substantially proportional to consumption of electrical energy in said mains, said pulse rate being electrically programmable;

    (ii) means for defining said succession of demand-monitoring intervals;

    (iii) means, responsive to said sensing means and said defining means, for accumulating said pulses generated during each said demand-monitoring interval; and

    (iv) means, responsive to said accumulating means, for generating said demand-monitoring interval values of electrical-power demand;

    (b) means, responsive to said computing means, for determining a maximum demand-monitoring interval value of the electrical-power demand; and

    (c) nonvolatile read/write memory means, responsive to said determining means, for storing said maximum demand-monitoring interval value even when said memory means is deenergized.

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