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Control system for electrical cord reel

  • US 9,806,505 B2
  • Filed: 03/30/2015
  • Issued: 10/31/2017
  • Est. Priority Date: 08/05/2011
  • Status: Active Grant
First Claim
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1. An electric cord control system comprising:

  • an electric cord comprising a first power wire, a second power wire, and a signal wire;

    a first switch configured to selectively connect the first power wire with a power source in a closed state, and to disconnect the first power wire from the power source in an open state;

    a controller configured to control the first switch and to provide a current to the signal wire;

    a first resistor electrically coupling the signal wire and the second power wire, and configured to allow a first current to flow from the signal wire to the second power wire;

    a continuity detector electrically coupled to the signal wire and configured to provide a continuity detection signal to the controller when the first current is flowing through the signal wire,wherein the controller is further configured to open the first switch when it fails to receive the continuity detection signal from the continuity signal detector.

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