Patent US4620084A successfully refreshed from Google Patents.
US4620084A
Expired / Lapsed
US
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Aircraft thermostat
Assignee: General Electric Co
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Filing: 1983-12-27
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Granted: 1986-10-28
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Expires: 2003-12-27
Abstract
Abstract The present invention relates to thermostats for aircraft water heaters. A temperature sensing circuit receives power through a supply circuit which includes a bridge rectifier and a ripple smoothing capacitor. When a predetermined temperature is reached there is an increase in power through the bridge rectifier. This increase triggers another switch which short circuits the input to the bridge and effects power supply to a heater coil.
Inventors
- 👤 Charles R Cunningham
- 👤 Glenn S Godden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:58
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906; G05D23/1909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3675046A
Cited
US4329568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |