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| Number | Title | Issue Date |
| 4387359 | Titania oxygen sensor with chrome oxide compensator An oxygen sensor utilizes a chrome oxide compensating resistor (5) in series with a titania sensing resistor (3). The chrome oxide resistor (5) not only compensates for the effects of temperature on the titania sensing (3) resistor, but since it exhibits ... | 06/07/1983 |
| 4377801 | Oxygen sensor for detecting the oxygen content of an internal combustion engine exhaust gas system An oxygen sensor (1) for detecting the oxygen content of an internal combustion engine exhaust gas system includes a generally cylindrical hollow insulator (3) having a first resistive element (17), preferably of titania, and a second resistive element (1... | 03/22/1983 |
| 4312120 | Glow plug manufacture The invention is a method of making a pressure tight seal for a glow plug characterized by applying a high current to heat a groove (31) in the outer shell (3) of a glow plug while simultaneously pressing together the sealing elements adjacent the groove ... | 01/26/1982 |
| 4299859 | Thin coat temperature compensated resistance oxide gas sensor A temperature compensated resistive oxygen sensor and a method of manufacturing the same. On the surface of the sensor there are disposed in spaced relation three electrodes. One electrode and a portion of a second electrode is completely covered by a lay... | 11/10/1981 |
| 4294668 | Method of measuring oxygen and process for pretreating a solid electrolyte oxygen gas sensing element An activated solid electrolyte oxygen gas sensing element with increased voltage output, shortened switching time and reduced internal resistance, the sensing element having inner and outer conductive catalyst electrodes thereon, is produced by subjecting... | 10/13/1981 |
| 4234542 | Thin coat temperature compensated resistance oxide gas sensor A temperature compensated resistive oxygen sensor and a method of manufacturing the same. On the surface of the sensor there are disposed in spaced relation three electrodes. One electrode and a portion of a second electrode is completely covered by a lay... | 11/18/1980 |
| 4233033 | Method and apparatus for measuring the O2 content of a gas A method and apparatus for obtaining an electrical signal which is a function of the 02 content of the exhaust gas of an internal combustion engine. Two resistors (1 and 3) are exposed to the exhaust gas of an internal combustion engine. Both r... | 11/11/1980 |
| 4225842 | Resistance type oxygen sensor A temperature compensated oxygen sensor has a generally cylindrical first insulator with an axial bore extending therethrough which is counterbored at one end. A second cylindrical insulator is retained in the bore in the first insulator either by a radia... | 09/30/1980 |
| 4210510 | Gas sensor with closely wound termination springs The helical compression spring which completes the electrical circuit between the interior surface of a tubular ion conductive solid electrolyte gas sensing element closed at one end, and an electrical terminal retained in spaced relation to the open end ... | 07/01/1980 |
| 4186071 | Process for producing oxygen gas sensor elements An activated oxygen gas sensor element having an increased voltage output under rich gas conditions, short switching response and reduced internal resistance is produced by chemically treating the inner conductive catalyst electrode of the sensor element ... | 01/29/1980 |
| 4174258 | Solid electrolyte oxygen sensor with zero oxygen reference A solid electrolyte oxygen gas sensor element 1 comprises an electrolyte body 3 having electrodes 7 and 11 on the outer and inner surfaces 5 and 9 thereof, with the inner surface 9 having a protective means 13 thereon to protect the same from contact with... | 11/13/1979 |
| 4169777 | Process for producing an activated oxygen gas sensor element An activated oxygen gas sensor element having an increased voltage output under rich gas conditions, short switching response and reduced internal resistance is produced by chemically treating the inner conductive catalyst electrode of the sensor element ... | 10/02/1979 |
| 4159234 | Oxygen sensor An oxygen sensor having a removably mounted shield (10) to protect the solid electrolyte tube (30) that extends from the sensor housing (20). In one embodiment of the invention the protective shield (10) includes a radially extending lip (12) that is snap... | 06/26/1979 |
| 4147513 | Method and apparatus for measuring the O2 content of a gas A method and apparatus for measuring the O2 content in an exhaust gas of an internal combustion engine by exposing two resistors to the exhaust gas of an internal combustion engine. The resistance of both resistors varies as a function of the t... | 04/03/1979 |
| 4136000 | Process for producing improved solid electrolyte oxygen gas sensors An oxygen gas sensor having a solid electrolyte oxygen gas sensor element, with an inner conductive catalyst electrode on the interior surface and an outer conductive catalyst electrode on the exterior surface thereof, which has a high voltage output and ... | 01/23/1979 |
| 4125374 | Method and apparatus for determining combustion mixture air/fuel ratio A wide range combustion mixture air/fuel ratio sensor in which an electrochemical cell supplies hydrogen gas to a palladium sensor element at a rate regulated by the output of a Wheatstone bridge circuit incorporating the sensor element. This generated hy... | 11/14/1978 |
| 4123344 | Two fire ceramic sealed oxygen sensing device and method of forming same A solid electrolyte oxygen sensing device, and a method for making the same, wherein an electrolyte wafer is sealed within a ceramic insulator by the shrinkage of the ceramic insulator when it is fired. The wafer is formed from an electrolytic material an... | 10/31/1978 |
| 4111778 | Protection assembly and ground for gas constituent sensor A zirconia type oxygen partial pressure sensor for use with an exhaust system wherein an electrical voltage signal is generated in response to an oxygen partial pressure differential across a solid electrolyte. A reference oxygen partial pressure is intro... | 09/05/1978 |
| 4107018 | Solid electrolyte gas sensor having a protective bonding layer A solid electrolyte sensor for sensing oxygen in exhaust gases having a solid electrolyte body of a thimble-like design with an inner conductor thereon and a nonreactive but compatible bonding layer of magnesium or calcium oxide over the outer surface of ... | 08/15/1978 |
| 4080276 | Gas sensor with protective coating and method of forming same A solid electrolyte oxygen sensor has a protective coating to protect a catalyst or conductive film thereon, which coating is formed as an inorganic reaction product of an oxide material and an inorganic acid which forms a matrix to bond the oxide materia... | 03/21/1978 |
