Coating processes – Electrical product produced – Metal coating
Patent
1979-10-01
1981-04-28
Smith, Ronald H.
Coating processes
Electrical product produced
Metal coating
427238, 427282, 427286, 427287, 4273835, 4273766, 204195S, 118406, 118408, 118421, 118504, 425110, 425468, 425469, 264269, 264516, B05D 512, B05C 302, B29F 110
Patent
active
042646472
ABSTRACT:
A reference electrode is rapidly automatically applied to the interior of tapered vitrified zirconia thimbles for an exhaust gas oxygen sensor. The coating is consistently smooth and predetermined in physical and electrical characteristics. In a specific example, a hollow elastomeric finger is nested within the thimble after dispensing a measured quantity of conductive ink into the thimble bottom. A gas jet applied to the ink from the finger lower end flows the conductive ink throughout a coating cavity below a shoulder in the finger after the ink quantity is substantially all applied to cavity walls, it no longer blocks a cavity vent, and allows the gas to flow freely through the cavity. Gas flow is then discontinued, and the finger withdrawn from the thimble.
REFERENCES:
patent: 3889628 (1975-07-01), Usab
patent: 3978006 (1976-08-01), Topp et al.
patent: 4001469 (1977-01-01), Harvey
patent: 4021326 (1977-05-01), Pollner et al.
patent: 4039703 (1977-08-01), Kemijo et al.
patent: 4107018 (1978-08-01), Bode et al.
patent: 4169778 (1979-11-01), Mann et al.
Bucker Richard
General Motors Corporation
Smith Ronald H.
Wallace Robert J.
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