Patent ID: 6689989
Filing Date: 2004-02-10
Classification: H05B

Abstract:
An electric blanket, comprising:a first core wire having a first end and a second end; a second core wire positioned adjacent the first core wire, the second core wire having first and second ends and engaging the first core wire in response to a predetermined temperature; a cutout operatively connected to the first end of the first core wire, the cutout movable between a first connected state wherein the cutout electrically couples the first end of the first core wire to a variable power source and a second disconnected state wherein the cutout disconnects the first end of the first core wire from the variable power source; and a monitoring circuit operatively connected to the second core wire, the monitoring circuit moving the cutout between the connected state and the disconnected state in response to engagement of the second core wire and the first core wire and including: a resistor and diode combination interconnecting the first end of the second core wire and a neutral point; and a second resistor and diode combination interconnecting the second end of the second core wire and the first end of the first coil wire.