Electrical resistors – Resistance value responsive to a condition – Gas – vapor – or moisture absorbing or collecting
Patent
1979-01-22
1980-09-16
Albritton, C. L.
Electrical resistors
Resistance value responsive to a condition
Gas, vapor, or moisture absorbing or collecting
73 27R, 324 65P, 338229, H01L 700
Patent
active
042232937
ABSTRACT:
An improved exhaust gas oxygen sensor of the type adapted for installation in the exhaust conduit of an internal combustion engine. The improved sensor preferably uses a titania metal oxide ceramic element to sense the partial pressure of oxygen in the exhaust gases to which the sensor is exposed. The sensor has a steel body, a ceramic insulator which is used to support the titania sensing element and its wires which pass through the insulator bodies and as terminal pins inserted into enlarged passages in the insulator for connection to the titania sensing element wires. The terminal pins are of an improved design wherein a cement material in the enlarged passage of the insulator is made to flow into a groove in each of the terminal pins and into another space between the exterior of the terminal pin and the interior of the insulator passage. The cement material causes the bond to form between the terminal pin and the insulator and prevent leakage of exhaust gases from the exhaust conduit to flow through the sensor to the ceramic environment. Seepage of the cement material in a location to the terminal pin and its exterior contact point with the insulator also is prevented.
REFERENCES:
patent: 3886785 (1975-06-01), Stadler et al.
patent: 3932246 (1976-01-01), Stadler et al.
patent: 4001758 (1977-01-01), Esper et al.
patent: 4012709 (1977-03-01), Logothetis et al.
patent: 4130797 (1978-12-01), Hattori et al.
Horn William F.
Springer Jerry L.
Wells Charles M.
Albritton C. L.
Brown Robert W.
Ford Motor Company
Sadler Clifford L.
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