Electrical resistors – Resistance value responsive to a condition – Gas – vapor – or moisture absorbing or collecting
Patent
1982-09-30
1984-04-10
Albritton, C. L.
Electrical resistors
Resistance value responsive to a condition
Gas, vapor, or moisture absorbing or collecting
338 28, H01L 700
Patent
active
044424205
ABSTRACT:
A partial pressure of oxygen sensor which finds utility when inserted into an exhaust system of a hydrocarbon fuel burning device. The oxygen sensor includes a mounting body both (a) threaded on one end for securement to the exhaust system, and (b) having a cylindrical configured bore extending along a central axis thereof. A heated sensing element is also provided which includes a ceramic support, a resistance heater element, and a titania dioxide sensor element in juxtaposition to the resistance heater element. An insulator body having a cylindrical configuration receives the heated sensing element therewithin. The insulator body is mounted in the cylindrical configured bore of the mounting body in a manner that the heated sensing element projects beyond a threaded end of the mounting body. A protection device is provided over the leading portion of the heated sensing element, this protection device also providing (a) an opening therein through which exhaust gases flow, and (b) a seat which accurately locates the heated sensing element therewithin. Electrical connections are made at the rear end of the mounting body to the resistance heater element and the titania dioxide sensor. Further structure is provided for supporting and sealing the electrical lead wires and providing electrical connections in a manner that the heating element is connected to a source of voltage and the sensing element to a sensing circuit.
REFERENCES:
patent: 3915135 (1975-10-01), Kushida et al.
patent: 4288774 (1981-09-01), Takami et al.
patent: 4303613 (1981-12-01), Yasuda et al.
patent: 4308518 (1981-12-01), Hattori et al.
patent: 4338281 (1982-07-01), Treitinger et al.
patent: 4343768 (1982-08-01), Kimura
Albritton C. L.
Ford Motor Company
Johnson Olin B.
Johnson William E.
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