US5041809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-ceramic temperature sensor for heating ovens
Assignee: General Electric Co
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Filing: 1990-01-08
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Granted: 1991-08-20
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Expires: 2010-01-08
Abstract
Abstract A temperature sensor includes a glass-ceramic substrate and a plurality of conductive elements deposited on the substrate. The substrate serves both as a support for the conductive elements and as a temperature-sensitive resistive material forming an operative part of the sensor itself. The conductive elements are arranged to provide one sensor configuration for sensing temperature over a first temperature range as a function of the resistance of one of the elements, a second sensor configuration for sensing temperature over a second temperature range as a function of the surface resistance of the substrate between two of the elements, and a third sensor arrangement for sensing temperature over a third temperature range as a function of the bulk resistance of the substrate between two of the elements separated by a thickness of substrate material less than the surface distance therebetween. Four contact pads are provided to connect the three sensor configurations to external signal processing circuitry.
Inventors
- 👤 Thomas R. Payne
- 👤 John Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:50
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
107 words
A temperature sensor comprising: a generally planar glass-ceramic substrate; first sensing means for sensing temperature over a first temperature range comprising a first conductive element deposited on one surface of said substrate; second sensing means for sensing temperature over a second temperature range comprising said first element and a second conductive element deposited on said one surface of said substrate adjacent and laterally spaced from a portion of said first element; and third sensing means for sensing temperature over a third temperature range comprising said first element and a third conductive element deposited on the opposite surface of said substrate generally laterally coextensive with said first element.
Claim 2
Dependent Claim
107 words
A temperature sensor comprising: a generally planar glass-ceramic substrate; first sensing means for sensing temperature over a first temperature range comprising a first conductive element deposited on one surface of said substrate; second sensing means for sensing temperature over a second temperature range comprising said first element and a second conductive element deposited on said one surface of said substrate adjacent and laterally spaced from a portion of said first element; and third sensing means for sensing temperature over a third temperature range comprising said first element and a third conductive element deposited on the opposite surface of said substrate generally laterally coextensive with said first element.
Claim 3
Dependent Claim
72 words
A temperature sensor in accordance with claim 1 wherein said first conductive element comprises a conductive film deposited on said one side of said substrate in a generally serpentine pattern and including a contact pad formed at each end thereof for connection to external circuitry and wherein said first sensing means is adapted to provide temperature information as a function of the electrical resistance of said first element between said contact pads.
Claim 4
Dependent Claim
65 words
A temperature sensor in accordance with claim 2 wherein said second conductive element comprises a conductive film including a conductive pad formed at one end thereof for connection to external circuitry and wherein said second sensing means is adapted to provide temperature information as a function of the electrical resistance of said glass substrate proximate said first surface thereof between said first and second elements.
Claim 5
Dependent Claim
54 words
A temperature sensor in accordance with claim 3 wherein said third conductive element comprises a conductive film including a contact pad for connection to external circuitry and said third sensing means is adapted to provide temperature information as a function of the electrical resistance of said glass substrate between said first and third elements.
Claim 6
Dependent Claim
39 words
A temperature sensor in accordance with claim 4 wherein said first temperature range is a relatively low range, said second temperature range is a relatively high range, and said third temperature range is between said first and second ranges.
Claim 7
Dependent Claim
150 words
A temperature sensor comprising: a generally planar glass-ceramic substrate; a first conductive element deposited on one surface of said substrate for sensing temperature over a first temperature range as a function of the electrical resistance of said first conductive element; a second conductive element deposited on said one surface of said substrate adjacent, laterally spaced from a portion of said first element and operative in combination with said first element and said substrate for sensing temperature over a second temperature range as a function of the electrical resistance of said substrate between said first and second elements; and a third conductive element deposited on the opposite surface of said substrate generally underlying said first element and operative in combination with said first element and said substrate for sensing temperature over a third temperature range as a function of the electrical resistance of said substrate between said first and third elements.
Claim 8
Dependent Claim
150 words
A temperature sensor comprising: a generally planar glass-ceramic substrate; a first conductive element deposited on one surface of said substrate for sensing temperature over a first temperature range as a function of the electrical resistance of said first conductive element; a second conductive element deposited on said one surface of said substrate adjacent, laterally spaced from a portion of said first element and operative in combination with said first element and said substrate for sensing temperature over a second temperature range as a function of the electrical resistance of said substrate between said first and second elements; and a third conductive element deposited on the opposite surface of said substrate generally underlying said first element and operative in combination with said first element and said substrate for sensing temperature over a third temperature range as a function of the electrical resistance of said substrate between said first and third elements.
Claim 9
Dependent Claim
39 words
A temperature sensor in accordance with claim 6 wherein said first temperature range is a relatively low range, said second temperature range is a relatively high range and said third temperature range is intermediate said first and second ranges.
Claim 10
Dependent Claim
51 words
A temperature sensor in accordance with claim 6 wherein said second and third elements each include a single contact pad and said first element includes a pair of contact pads, one at each end thereof, one of said pair comprising a common pad utilized over all three of said temperature ranges.
Claim 11
Dependent Claim
121 words
A temperature sensor comprising: a glass-ceramic substrate and a plurality of conductive elements deposited on said substrate, said conductive elements being arranged to provide a first sensing means for sensing temperature over a first temperature range as a function of the electrical resistance of one of said elements, a second sensing means for sensing temperature over a second temperature range as a function of the surface electrical resistance of said substrate between two of said elements and a third sensing means for sensing temperature over a third temperature range as a function of the bulk electrical resistance of said substrate between two of said elements separated from each other by a thickness of said substrate less than the surface distance therebetween.
Claim 12
Dependent Claim
121 words
A temperature sensor comprising: a glass-ceramic substrate and a plurality of conductive elements deposited on said substrate, said conductive elements being arranged to provide a first sensing means for sensing temperature over a first temperature range as a function of the electrical resistance of one of said elements, a second sensing means for sensing temperature over a second temperature range as a function of the surface electrical resistance of said substrate between two of said elements and a third sensing means for sensing temperature over a third temperature range as a function of the bulk electrical resistance of said substrate between two of said elements separated from each other by a thickness of said substrate less than the surface distance therebetween.
Claim 13
Dependent Claim
39 words
A temperature sensor in accordance with claim 9 wherein said one element of said first sensing means comprises one of said two elements in said second sensing means and one of said two elements of said third sensing means.
Claim 14
Dependent Claim
99 words
A temperature sensor comprising: a glass-ceramic substrate and a plurality of conductive elements deposited on said substrate, said conductive elements being arranged to provide a first sensing means for sensing temperature over a first relatively high temperature range as a function of the surface electrical resistance of said substrate between two of said elements and a second sensing means for sensing temperature over a second temperature range as a function of the bulk electrical resistance of said substrate between two of said elements separated from each other by a thickness of said substrate less than the surface distance therebetween.
Claim 15
Dependent Claim
99 words
A temperature sensor comprising: a glass-ceramic substrate and a plurality of conductive elements deposited on said substrate, said conductive elements being arranged to provide a first sensing means for sensing temperature over a first relatively high temperature range as a function of the surface electrical resistance of said substrate between two of said elements and a second sensing means for sensing temperature over a second temperature range as a function of the bulk electrical resistance of said substrate between two of said elements separated from each other by a thickness of said substrate less than the surface distance therebetween.
Claim 16
Dependent Claim
112 words
A temperature sensor for sensing temperature over an operating temperature range divided into an upper portion and a lower portion, said sensor comprising: a generally planar glass-ceramic substrate; first sensing means for sensing temperature over the upper portion of the operating temperature range comprising first and second conductive elements deposited on one surface of said substrate adjacent and laterally spaced from each other; and second sensing means for sensing temperature over the lower portion of the operating temperature range comprising one of said first and second elements and a third conductive element deposited on the opposite surface of said substrate generally laterally coextensive with said one of said first and second elements.
Claim 17
Dependent Claim
112 words
A temperature sensor for sensing temperature over an operating temperature range divided into an upper portion and a lower portion, said sensor comprising: a generally planar glass-ceramic substrate; first sensing means for sensing temperature over the upper portion of the operating temperature range comprising first and second conductive elements deposited on one surface of said substrate adjacent and laterally spaced from each other; and second sensing means for sensing temperature over the lower portion of the operating temperature range comprising one of said first and second elements and a third conductive element deposited on the opposite surface of said substrate generally laterally coextensive with said one of said first and second elements.
Claim 18
Dependent Claim
68 words
A temperature sensor in accordance with claim 12 wherein said first and second conductive elements each comprise a conductive film including a conductive pad formed at one end thereof for connection to external circuitry and wherein said first sensing means is adapted to provide temperature information as a function of the electrical resistance of said glass substrate proximate said first surface thereof between said first and second elements.
Claim 19
Dependent Claim
66 words
A temperature sensor in accordance with claim 13 wherein said third conductive element comprises a conductive film including a contact pad for connection to external circuitry and said second sensing means is adapted to provide temperature information as a function of the bulk electrical resistance presented by the thickness of said glass-ceramic substrate between said third element and said one of said first and second elements.
Claim 20
Dependent Claim
132 words
A temperature sensor comprising: a generally planar glass-ceramic substrate; first and second conductive elements deposited on one surface of said substrate adjacent and laterally spaced from each other and operative in combination with said substrate for sensing temperature over a first temperature range as a function of the surface electrical resistance of said substrate between said first and second elements; and a third conductive element deposited on the opposite surface of said substrate generally underlying one of said first and second elements and operative in combination with said one of said first and second elements and said substrate for sensing temperature over a second temperature range as a function of the bulk resistance of the thickness of said substrate between said third element and said one of said first and second elements.
Claim 21
Dependent Claim
132 words
A temperature sensor comprising: a generally planar glass-ceramic substrate; first and second conductive elements deposited on one surface of said substrate adjacent and laterally spaced from each other and operative in combination with said substrate for sensing temperature over a first temperature range as a function of the surface electrical resistance of said substrate between said first and second elements; and a third conductive element deposited on the opposite surface of said substrate generally underlying one of said first and second elements and operative in combination with said one of said first and second elements and said substrate for sensing temperature over a second temperature range as a function of the bulk resistance of the thickness of said substrate between said third element and said one of said first and second elements.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |