Control system for electrical cord reel
First Claim
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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Accused Products
Abstract
In an electrical cord reel, a rotatable member can rotate about a winding axis to spool and unspool a linear material. An input power connector can couple to an electrical power source. An output power connector on the rotatable member can couple to an electrical cord at least partially wound about the rotatable member. A switch is adjustable to allow or prevent electrical current flow from the input power connector to the output power connector. In an aspect, the electrical cord reel includes an electric cord comprising a first power wire, a second power wire, and a signal wire. A method of controlling the electric cord spool system includes energizing the first power wire and the signal wire. The method further includes determining a continuity of the signal wire. The method further includes de-energizing the first power wire when determining discontinuity of the signal wire.
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Citations
22 Claims
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1. An electric cord control system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of controlling an electric cord spool system comprising an electric cord comprising a first power wire, a second power wire, and a signal wire, the method comprising:
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energizing the first power wire and the signal wire; determining a continuity of the signal wire; and de-energizing the first power wire when determining discontinuity of the signal wire. - View Dependent Claims (20, 21, 22)
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Specification