Method of making an electrically heated, glass vision unit
US4668270A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1986 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Sep 11, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/016
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This specification teaches a method of making an electrically heated, glass vision unit having a complex curved configuration. The method is initiated 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, 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 betwe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.