Patent US4238308A successfully refreshed from Google Patents.
US4238308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for monitoring a component in a fluid mixture
Assignee: Servomex Group Ltd
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Filing: 1978-09-25
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Granted: 1980-12-09
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Expires: 1998-09-25
Abstract
Abstract An oxygen sensor having a solid electrolyte tube and partition. A heater is tightly wound along the length of the tube, which is divided into two equal chambers by the partition, and thermocouples are fixed to either side of the partition by layers of metallic particles. An insulating case and flame trap may be provided for the sensor.
Inventors
- 👤 Riad M. A. Kocache
- 👤 Danny F. Holman
- 👤 Ronald H. Sunderland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:19
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075; G01N27/4076; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G01N33/0016
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A device for monitoring a component in a fluid mixture comprising a solid electrolyte tube, the bore of which is divided into two chambers at a distance substantially mid-way along its length by a disc of said solid electrolyte, said tube being provided with heating means on each side of said disc; said heating means being a heat-producing element which is substantially coextensive with the length of said tube, and substantially everywhere in contact with a corresponding surface of said tube, and the periphery of said disc being continuously integral with said tube, whereby to provide said disc with even heat resulting in substantially the same temperature on each side of said disc, said disc being provided with electrodes on its opposed faces.
Claim 2
Independent Claim
123 words
A device for monitoring a component in a fluid mixture comprising a solid electrolyte tube, the bore of which is divided into two chambers at a distance substantially mid-way along its length by a disc of said solid electrolyte, said tube being provided with heating means on each side of said disc; said heating means being a heat-producing element which is substantially coextensive with the length of said tube, and substantially everywhere in contact with a corresponding surface of said tube, and the periphery of said disc being continuously integral with said tube, whereby to provide said disc with even heat resulting in substantially the same temperature on each side of said disc, said disc being provided with electrodes on its opposed faces.
Claim 3
Dependent Claim
36 words
A device according to claim 1, wherein the disc and tube are integral by reason of said tube being of solid electrolyte which is the same as, and continuous with, the solid electrolyte of said disc.
Claim 4
Dependent Claim
18 words
A device according to claim 1, wherein the disc and tube are separate members which are sealed together.
Claim 5
Dependent Claim
24 words
A device according to claim 1, wherein the heating means comprises a coil of wire wound in grooves on the exterior of the tube.
Claim 6
Independent Claim
118 words
A device for monitoring a component in a fluid mixture comprising a solid electrolyte tube, the bore of which is divided into two chambers at a distance substantially mid-way along its length by a disc of said solid electrolyte said tube being provided with heating means on each side of the disc whereby to provide the disc with even heat resulting in substantially the same temperature on each side of same disc, said disc being provided with electrodes on its opposed faces, one of said electrodes being metal particles fixed to one side of said disc, and there being a temperature sensing element held by said particles to said one side of said disc in close contact therewith.
Claim 7
Independent Claim
118 words
A device for monitoring a component in a fluid mixture comprising a solid electrolyte tube, the bore of which is divided into two chambers at a distance substantially mid-way along its length by a disc of said solid electrolyte said tube being provided with heating means on each side of the disc whereby to provide the disc with even heat resulting in substantially the same temperature on each side of same disc, said disc being provided with electrodes on its opposed faces, one of said electrodes being metal particles fixed to one side of said disc, and there being a temperature sensing element held by said particles to said one side of said disc in close contact therewith.
Claim 8
Independent Claim
39 words
A device according to any of claims 1 through 4 wherein said tube is contained within a cylinder and is everywhere spaced from the said cylinder, and there being insulation filling the space between said cylinder and said tube.
References Cited (Backward Citations)
US3546086A
Cited
US3738341A
Cited
US3720594A
Cited
US3723279A
Cited
US3691023A
Cited
US3928161A
Cited
US3865707A
Cited
US3962866A
Cited
US4057477A
Cited
FR2272395A1
Cited
US3977830A
Cited
US4040930A
Cited
US4088543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |