US4782708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouple sensors
Assignee: Motors Liquidation Co
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Filing: 1987-08-27
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Granted: 1988-11-08
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Expires: 2007-08-27
Abstract
Abstract An air flow sensor which employs a thermocouple using a film of bismuth 0 .92 antimony 0 .08 to form junctions with gold, platinum or nickel strips and a resistive strip heater of the same metal.
Inventors
- 👤 Charles R. Harrington
- 👤 Joseph P. Heremans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:40
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01F1/684; G01F1/6845; G01F1/688; G01F1/6888; G01F1/704; G01F1/708; G01F1/7084
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A sensor for use in an air flow sensor system which comprises: means forming a common substrate; means forming a resistive strip heater of a first metal supported on said substrate and adapted to be supplied with heating power; and means for forming a pair of thermocouple junctions including a pair of spaced junction elements of the first metal and, extending between the pair of junction elements and forming junctions therewith, a continuous film of Bi 1-x S bx where X=0.01 to 0.15.
Claim 2
Dependent Claim
83 words
A sensor for use in an air flow sensor system which comprises: means forming a common substrate; means forming a resistive strip heater of a first metal supported on said substrate and adapted to be supplied with heating power; and means for forming a pair of thermocouple junctions including a pair of spaced junction elements of the first metal and, extending between the pair of junction elements and forming junctions therewith, a continuous film of Bi 1-x S bx where X=0.01 to 0.15.
Claim 3
Dependent Claim
8 words
The sensor of claim 1 in which X=0.08.
Claim 4
Dependent Claim
21 words
The sensor of claim 1 in which the first metal is taken from the group consisting of nickel, platinum and gold.
Claim 5
Dependent Claim
8 words
The sensor of claim 3 in which X=0.08.
Claim 6
Dependent Claim
34 words
The sensor of claim 1 in which the strip heater means and each of the spaced junction elements lie in a plane whereby they may be formed as separate portions of a common layer.
Claim 7
Dependent Claim
55 words
The sensor of claim 1 in which said resistive strip heater and said pair of spaced junction elements lie in a plane whereby they may be formed from discrete portions of a common metal layer overlying the substrate, and the substrate comprises a thermally conductive support over which lies a layer of a thermal insulator.
Claim 8
Dependent Claim
19 words
The sensor of claim 6 in which the continuous film extends between and overlaps the two spaced junction elements.
Claim 9
Dependent Claim
38 words
The sensor of claim 6 in which the metal of the common layer is taken from the group consisting of nickel, platinum and gold, the thermally conductive support is of silicon and the insulator is a polyimide layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |