Patent ID: 8669493

Claim:
An assembly comprising: an electrically heatable glazing unit; and an apparatus sensitive to magnetic fields that is separate from the glazing unit and installed adjacent the glazing unit; wherein the glazing unit includes a plurality of collector conductors that supply a plurality of heating conductors with an electric current used to heat up the heating conductors and the glazing unit, the plurality of collector conductors including a first pair of collector conductors and a second pair of collector conductors, wherein the first pair of collector conductors includes a first collector conductor and a second collector conductor disposed, respectively, along opposing longitudinal sides of the glazing unit, wherein the second pair of collector conductors includes a third collector conductor and a fourth collector conductor disposed, respectively, extending along the longitudinal sides of the glazing unit and parallel with the first and second collector conductors, the third and fourth collector conductors being disposed between the first and second collector conductors so as to be closer to a center of the glazing unit than the first and second collector conductors, and the third and fourth collector conductors being shorter in length than the first and second collector conductors so as to extend over a portion of the glazing unit less than a length of extension of the first and second collector conductors, wherein the apparatus is situated adjacent to a partial region of a surface of the glazing unit which region corresponds to the portion of the glazing unit over which the third and fourth collector conductors extend, the partial region including an arrangement of adjacent parallel heating conductors connected at ends thereof between the third and fourth collector conductors and in which current flows in an opposite direction to a direction of current in the heating conductors disposed across a part of the glazing unit outside of a periphery of the partial region, and wherein the arrangement of adjacent parallel heating conductors minimizes by mutual compensation or elimination a magnetic field acting locally within the partial region and perpendicularly to a plane of the glazing unit when the current flows.