US3952276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid tight NTC high temperature sensor and method of producing same
Assignee: Siemens AG
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Filing: 1975-02-06
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Granted: 1976-04-20
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Expires: 1995-02-06
Abstract
Abstract A thermistor for use as a temperature sensor for high temperatures which is sealed into a quartz tubular housing in a gas and liquid tight manner. In this construction current conductor elements are fused into the quartz housing to seal the thermistor in the housing in a fluid tight manner. Current supply lines of platinum in the form of wire or bands are connected between the thermistor and the molybdenum supply lines.
Inventors
- 👤 Horst Walch
- 👤 Urlich Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:13
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/08; G01K7/00; G01K7/16; G01K7/22; G01K7/223; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49085
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
49 words
A gas and liquid tight NTC-high temperature sensor comprising: a quartz housing; a thermistor built into said quartz housing and disposed in an oxidizing atmosphere; molybdenum current carrying elements partially molten into said quartz housing; platinum current carrying elements connected between said thermistor and said molybdenum current carrying elements.
Claim 2
Dependent Claim
49 words
A gas and liquid tight NTC-high temperature sensor comprising: a quartz housing; a thermistor built into said quartz housing and disposed in an oxidizing atmosphere; molybdenum current carrying elements partially molten into said quartz housing; platinum current carrying elements connected between said thermistor and said molybdenum current carrying elements.
Claim 3
Dependent Claim
18 words
The NTC-high temperature sensor of claim 1 wherein said platinum current carrying elements are constructed as a wire.
Claim 4
Dependent Claim
18 words
The NTC-high temperature sensor of claim 1 wherein said platinum current carrying elements are constructed as a band.
Claim 5
Dependent Claim
19 words
The NTC-high temperature sensor of claim 1 including an insulator disposed between said molybdenum and platinum current carrying elements.
Claim 6
Dependent Claim
14 words
The NTC-high temperature sensor of claim 4 wherein said insulator comprises a quartz material.
Claim 7
Dependent Claim
14 words
The NTC-high temperature sensor of claim 1 wherein said thermistor comprises a metal oxide.
Claim 8
Dependent Claim
15 words
The NTC-high temperature sensor of claim 6 wherein said metal is a rare earth metal.
Claim 9
Dependent Claim
16 words
The NTC-high temperature sensor of claim 1 wherein said thermistor comprises a mixture of metal oxides.
Claim 10
Dependent Claim
14 words
The NTC-high temperature sensor of claim 8 wherein said metals are rare earth metals.
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) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |