Electrically heated, glass vision unit

Details Electrically heated, glass vision unit Electrically heated, glass vision unit

1986-09-11

1988-05-10

Goldberg, E. A.

Electric heating

Heating devices

With heating unit structure

219203, 219522, 219547, 219548, 338309, 427108, 428209, 428210, H05B 316, H01C 1012, B05D 512, E32B 300

Patent

active

047437413

ABSTRACT:
This specification teaches an electrically heated, glass vision unit having a complex curved configuration. The unit is made by cutting a glass substrate (10) from a flat glass bracket (12). The glass substrate (10) has first and second surfaces separated by a uniform distance. A pair of electrically conductive bus bars (16--16) are applied to one of the surfaces of the glass substrate (10). The bus bars (16--16) are so positioned on the flat glass substrate (10) that when the substrate (10) is bent to form the glass vision unit of complex curved configuration, inboard edges (16a--16a) of the pair of electrically conductive bus bars (16--16) are equally distant from one another throughout their entire extent. The flat glass substrate (10) is bent to form the glass vision unit of complex curved configuration. A conductive coating (20) is applied to the one surface of the glass substrate (10) and extends between the pair of bus bars (16--16) throughout their entire extent. In this manner, when electrical energy is applied to the bus bars (16--16), a uniform flow of current takes place from one bus bar to another bus bar so that a uniformly developed heating pattern is established between the bus bars (16--16).

REFERENCES:
patent: 3659079, Whittemore
patent: 3705047 (1972-12-01), Marriott
patent: 4644139 (1987-02-01), Harrison et al.

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