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US 4,127,763 AGranted
Heated window with a moisture sensor having a high impedance
AssigneeSaint-Gobain Industries
InventorSergio Roselli
Life of this patent
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AssigneeSaint-Gobain Industries
InventorSergio Roselli
Estimating the term…
A window has a heating grid and a moisture sensor formed thereon for connection to a detector which automatically controls the heating. The sensor has an output terminal and another terminal connected to a heating conductor, the sensor being positioned outwardly of the heating grid with the area of the sensor including the output terminal lying in the heating zone. Advantageously the outer limit of the sensor is closely adjacent the outer limit of the heating zone. The output terminal is positioned between the outward limit of the sensor electrodes and the boundary heating conductor. A shield electrode connected to the heating conductor may be provided. The sensor may be located between a pair of heating conductors adjacent a heating grid collector with one electrode connected to the conductors. For deep windows, the sensor may be located in an offset branched section of a boundary heating conductor.
A heated window having a heating grid formed of a plurality of resistive heating conductors and a moisture sensor formed on the window for connection to a moisture detector for automatically controlling the energization of the heating grid, said sensor having a first electrode connected to an output terminal and a second electrode connected to a heating conductor of the heating grid, the area of the sensor including said output terminal being disposed within the heating zone of the heating grid and said output terminal being positioned closer to the center of the heating zone than the edge of the area of said sensor furthest from the center of the heating zone.
Dependencies are inferred from the claim text.