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Remotely-controllable relays

  • US 4,361,766 A
  • Filed: 10/15/1980
  • Issued: 11/30/1982
  • Est. Priority Date: 10/24/1979
  • Status: Expired due to Term
First Claim
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1. A remotely-controllable relay for effecting an operation in response to a control signal in the form of an alternating ripple voltage superimposed upon an alternating power supply voltage in an electric-power distribution network, comprising:

  • means arranged to store predetermined parameters of said operation and said control signal, said parameters including an indication of a preselected period of delay required between reception of said control signal and occurrence of said operation, the value of a predetermined constant, and the value of a predetermined unit time interval, said period of delay being equal to the product of said constant and said unit time interval;

    means responsive to said storage means and coupled to said network to detect the transmission of a control signal conforming to said stored predetermined parameters relating thereto;

    means responsive to said detection means and said storage means and arranged to determine when said period of delay has elapsed following said transmission; and

    means responsive to said delay determining means and said storage means and arranged to effect said operation in accordance with said stored predetermined parameters relating thereto.

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