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Method and apparatus for remotely controlling an electrical appliance

  • US 4,329,678 A
  • Filed: 03/24/1980
  • Issued: 05/11/1982
  • Est. Priority Date: 03/24/1980
  • Status: Expired due to Term
First Claim
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1. Apparatus for remotely controlling an electrical appliance connected across an alternating current power line, the apparatus comprising:

  • a transmitter having an output adapted to be connected across an alternating current power line at a point remote from an appliance to be controlled, the transmitter including a capacitor, an inductor, a controlled rectifier having an anode, a cathode, and a gate electrode, means for connecting the capacitor, the inductor, and the anode and cathode of the controlled rectifier in series across the output, means during alternating current half cycles of one polarity for charging the capacitor, means during alternating current half cycles of the other polarity for firing the controlled rectifier rapidly to discharge the capacitor, and means for holding the controlled rectifier in a conducting state during the remainder of the alternating current half cycle after the controlled rectifier fires; and

    a receiver adapted to be connected across an alternating current power line to couple the line to an appliance to be controlled, the receiver including means responsive to control pulses generated by the transmitter for controlling the transfer of power from the line to the appliance.

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