US Patent 10129932 Sensing element

A sensing element for sensing a temperature of an electrically heated window includes a coil of filament wire having a first end and a second end, the coil having a resistivity that changes based on temperature, a first substantially flat conductive material electrically coupled to the first end of the coil, a second substantially flat conductive material electrically coupled to the second end of the coil, a first lead wire electrically coupled to the first substantially flat conductive material and extending outwardly, and a second lead wire electrically coupled to the second substantially flat conductive material and extending outwardly.