US3559457A
Expired / Lapsed
US
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Hydrogen detector
Assignee: General Electric Co
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Filing: 1969-11-20
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Granted: 1971-02-02
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Expires: 1989-11-20
Abstract
Abstract A TRANSFORMER TANK HYDROGEN DETECTOR COMPRISES AN INSTRUMENT HOUSING MOUNTED TO FORM A WALL PORTION OF THE TANK. DISPOSED INSIDE THE HOUSING AND COMMUNICATING WITH AN APERTURE THEREIN IS A TUBULAR DETECTING ELEMENT HAVING A SURFACE COMMUNICATING WITH THE INTERIOR OF THE TANK. THE TUBULAR DETECTING ELEMENT IS FORMED OF A PALLADIUM ALLOY WHICH WILL EXPAND IN THE PRESENCE OF HYDROGEN. INDICATOR MEANS ARE CONNECTED TO THE TUBE AND DISPLAY THE AMOUNT OF ITS AXIAL EXPANSION. VALVE MEANS ARE UTILIZED TO INTRODUCE A STANDARD GAS INTO THE HOUSING FOR CALIBRATION PURPOSES. ALARM MEANS AND TEMPERATURE REGULATING MEANS MAY ALSO BE UTILIZED.
Inventors
- 👤 Ralph L Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:52
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; H; H01; H01F; H01F27/00; H01F27/40; H01F27/402; H01F27/404
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |