Patent ID: 6300597
Filing Date: 2001-10-09
Classification: H05B

Abstract:
An electrical heating pad for use with an ungrounded source voltage, the heating pad comprising:a heating element arranged in the heating pad and defining a substantially coplanar plane, the heating element including:a first core made of an insulating material;a first conductive element wound around the first core using the first core as an axis;a second core made of an insulating material arranged in surrounding relation to the first core and the first conductive element; anda second conductive element wound around the second core using the second core as an axis, wherein the first and second conductive elements are connected to each other at one ends and are connected to the ungrounded source voltage at the other ends to at least partially cancel out magnetic field generated from each conductive element; and a fabric outer cover coplanarly enclosing the heating element.