Patent US3969064A successfully refreshed from Google Patents.
US3969064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of gas burners
Assignee: Individual
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Filing: 1976-02-02
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Granted: 1976-07-13
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Expires: 1996-02-02
Abstract
Abstract A circuit for protecting a gas burner is described to shut the flow of gas off, if the air blower fails.
Inventors
- 👤 Earle W. Ballentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:48
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/24; F23N5/245; F23N2233/00; F23N2233/06; F23N5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A burner for heating a cooking pan having a burner means, a combustion chamber above the burner means and an impeller driven by a motor for feeding air to the combustion chamber, an electrical control system for and connected to the motor, comprising: ballast resistor means positioned in the stream of air flowing radially from the impeller means, one terminal of the ballast resistor means being connected to one side of the power line; a fixed resistor connected to the other terminal of the ballast resistor; relay means having a switch and a coil, the coil being connected to one terminal of a diode means, the other terminal of the diode means being connected to one terminal of the fixed resistor means, the relay being connected additionally to the other terminal of the fixed resistor means; and the switch of the relay controlling the power supply to the motor to turn the impeller off when the airflow across the ballast resistor decreases to a small value.
Claim 2
Dependent Claim
166 words
A burner for heating a cooking pan having a burner means, a combustion chamber above the burner means and an impeller driven by a motor for feeding air to the combustion chamber, an electrical control system for and connected to the motor, comprising: ballast resistor means positioned in the stream of air flowing radially from the impeller means, one terminal of the ballast resistor means being connected to one side of the power line; a fixed resistor connected to the other terminal of the ballast resistor; relay means having a switch and a coil, the coil being connected to one terminal of a diode means, the other terminal of the diode means being connected to one terminal of the fixed resistor means, the relay being connected additionally to the other terminal of the fixed resistor means; and the switch of the relay controlling the power supply to the motor to turn the impeller off when the airflow across the ballast resistor decreases to a small value.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |