Glass manufacturing – Processes – With coating
Patent
1988-05-12
1989-07-11
Kellogg, Arthur
Glass manufacturing
Processes
With coating
65 605, 65107, C03T 23023, C03C 1704
Patent
active
048468690
ABSTRACT:
A moisture sensor consistsof an array of spaced apart, highly abrasion-resistant electrodes disposed on the outside surface of the windshield of a vehicle. When moisture moisture is present, the spaces between the electrodes are bridged by the water and the output impedance of the sensor significantly decreases. This signals the presence of moisture. The electrodes have particles of a conductive metal oxide, e.g., ruthenium oxide, dispersed within a glass matrix which is fused to the windshield glass. The electrodes are formulated as an ink including particles of the metal oxide, a glass frit, and an organic binder. The ink is silk screened onto the windshield in the desired electrode pattern. After drying of the ink, the glass frit is fused to the windshield during normal heating of the windshield to shape it in a known windshield shaping (sagging) process. Novel two layer sensor arrangements, providing even greater resistance to abrasion, are also described.
REFERENCES:
patent: 2877329 (1959-03-01), Gaiser
patent: 3684569 (1972-08-01), Milgram
patent: 4109377 (1981-08-01), Blazick et al.
patent: 4554493 (1985-11-01), Armstrong
patent: 4655811 (1987-04-01), Bitter
patent: 4665351 (1987-05-01), Nyberg
patent: 4718932 (1988-01-01), Pharms
Delco Electronics Corporation
Kellogg Arthur
Wallace Robert J.
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