Electrically heated vehicle window

Details Electrically heated vehicle window Electrically heated vehicle window

1977-08-11

1980-04-01

Bartis, A.

Electric heating

Heating devices

Combined with diverse-type art device

52171, 73 73, 200 6105, 219522, 219543, 338 35, 340602, H05B 102, E06B 712, H05B 326

Patent

active

041963385

ABSTRACT:
A humidity-responsive heating circuit for a window of an automotive vehicle includes a grid of heating conductors on the window and two conductors closely approaching each other on the surface of the window such that the resistance between them changes, upon the appearance of humidity bridging the space between them, sufficiently to provide a signal. All of the conductors are composed of the same paste having the same properties and are applied as a single baked, silk screen printed pattern. The circuit may further include a switch to apply a voltage between those two conductors, amplifying means responsive to change of resistance between them, and a relay controlled by the amplifying means for connection of the heating grid to a source of voltage.

REFERENCES:
patent: 2735907 (1956-02-01), Inman
patent: 3071746 (1963-01-01), Kohl
patent: 3553833 (1971-01-01), Jochim et al.
patent: 3555289 (1971-01-01), Sobkow
patent: 3649898 (1972-03-01), Inoue
patent: 3749885 (1973-07-01), Nagasima
patent: 3832527 (1974-08-01), Nagasima

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