Electrically heated window

Details Electrically heated window Electrically heated window

H - Electricity

05

B

H05B 3/86 (2006.01) H05B 3/84 (2006.01)

Patent

CA 2194936

A window is provided which includes an array of fine, closely spaced wires through which electric current is passed to heat the window. Such windows are useful as vehicle windows, e.g. windscreens, because the heating disperses ice or condensation on the surface of the window, thereby improving visibility. According to the invention, at least some of the wires extend along diverging lines, so that the heated area extends over substantially the whole of the transparent portion of the window. It is also described how to achieve a sufficiently uniform heating effect over the extended heated area. A method of manufacturing such windows, and an apparatus for forming such arrays of wires, are also provided.

ne fenêtre est dotée d'un ensemble de fils minces disposés en espacement serré et dans lesquels passe un courant électrique dans le but de chauffer la fenêtre. Ces fenêtres sont utiles dans les véhicules, p. ex. comme pare-brise, parce que la chaleur disperse la glace ou la condensation à la surface de la fenêtre, ce qui améliore la visibilité. Selon l'invention, au moins quelques-uns des fils s'étendent suivant des lignes divergentes, de sorte que la surface chauffée couvre à peu près tout le vitrage de la fenêtre. On explique également comment obtenir un effet de chauffage suffisamment uniforme sur l'ensemble de la surface chauffée. On décrit aussi une méthode de fabrication de ces fenêtres et un appareil permettant de former l'ensemble de fils chauffants.

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