Patent US3887325A successfully refreshed from Google Patents.
US3887325A
Expired / Lapsed
US
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Control method and apparatus for burners
Assignee: Sioux Steam Cleaner Corp
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Filing: 1973-05-29
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Granted: 1975-06-03
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Expires: 1993-05-29
Abstract
Abstract Control apparatus for burners having independent spark and flame sensors which control turn-on in three phases. A spark is produced in the first phase, a low flame in the second, and a high flame in the third. Fuel for the low and high flame is supplied through independent lines and valving. The control apparatus prevents the burner from being turned on unless certain operating conditions are present.
Inventors
- 👤 John F Finger
- 👤 Merle E Pochop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:04
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N2227/00; F23N2227/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
A method of operating a burner for heating a flowing fluid, the burner having first and second operating temperatures associated therewith, and a combustion chamber for highly volatile explosive fuel requiring an operating combustion air pressure, the method including the following steps: a. sensing the first operating temperature; b. sensing the fluid flow; c. sensing the air pressure; d. forming a spark only if the sensed first operating temperature, fluid flow, and air pressure are within predetermined operating ranges; e. directly visually sensing the spark; f. providing a small amount of said volatile fuel to the combustion chamber only if the spark is visually sensed, the spark igniting the fuel, which in burning forms a flame that is low; g. sensing the flame; h. sensing the second operating temperature; and i. providing a large amount of said volatile fuel to the combustion chamber only if the flame is sensed and the second operating temperature is within a predetermined operating range, the low flame igniting the large amount of fuel which in burning forms a flame that is high.
Claim 2
Independent Claim
178 words
A method of operating a burner for heating a flowing fluid, the burner having first and second operating temperatures associated therewith, and a combustion chamber for highly volatile explosive fuel requiring an operating combustion air pressure, the method including the following steps: a. sensing the first operating temperature; b. sensing the fluid flow; c. sensing the air pressure; d. forming a spark only if the sensed first operating temperature, fluid flow, and air pressure are within predetermined operating ranges; e. directly visually sensing the spark; f. providing a small amount of said volatile fuel to the combustion chamber only if the spark is visually sensed, the spark igniting the fuel, which in burning forms a flame that is low; g. sensing the flame; h. sensing the second operating temperature; and i. providing a large amount of said volatile fuel to the combustion chamber only if the flame is sensed and the second operating temperature is within a predetermined operating range, the low flame igniting the large amount of fuel which in burning forms a flame that is high.
Claim 3
Independent Claim
178 words
A method of operating a burner for heating a flowing fluid, the burner having first and second operating temperatures associated therewith, and a combustion chamber for highly volatile explosive fuel requiring an operating combustion air pressure, the method including the following steps: a. sensing the first operating temperature; b. sensing the fluid flow; c. sensing the air pressure; d. forming a spark only if the sensed first operating temperature, fluid flow, and air pressure are within predetermined operating ranges; e. directly visually sensing the spark; f. providing a small amount of said volatile fuel to the combustion chamber only if the spark is visually sensed, the spark igniting the fuel, which in burning forms a flame that is low; g. sensing the flame; h. sensing the second operating temperature; and i. providing a large amount of said volatile fuel to the combustion chamber only if the flame is sensed and the second operating temperature is within a predetermined operating range, the low flame igniting the large amount of fuel which in burning forms a flame that is high.
Claim 4
Independent Claim
178 words
A method of operating a burner for heating a flowing fluid, the burner having first and second operating temperatures associated therewith, and a combustion chamber for highly volatile explosive fuel requiring an operating combustion air pressure, the method including the following steps: a. sensing the first operating temperature; b. sensing the fluid flow; c. sensing the air pressure; d. forming a spark only if the sensed first operating temperature, fluid flow, and air pressure are within predetermined operating ranges; e. directly visually sensing the spark; f. providing a small amount of said volatile fuel to the combustion chamber only if the spark is visually sensed, the spark igniting the fuel, which in burning forms a flame that is low; g. sensing the flame; h. sensing the second operating temperature; and i. providing a large amount of said volatile fuel to the combustion chamber only if the flame is sensed and the second operating temperature is within a predetermined operating range, the low flame igniting the large amount of fuel which in burning forms a flame that is high.
Claim 5
Dependent Claim
271 words
A failsafe burner control apparatus for controlling the supply and ignition of highly volatile and explosive fuel such as gasoline or jet fuel in a burner used within a larger system having a plurality of measurable operating quantities, comprising: a. first sensing means for sensing a plurality of said operating quantities and for respectively providing a plurality of control signals indicative thereof; b. means for forming a spark when energized; c. control means responsive to said plurality of operating quantity control signals and operatively connected to said spark forming means for energizing said spark forming means only when each of said plurality of operating quantities is within a predetermined range; d. a spark sensor mounted to directly visually sight the presence or absence of said spark for providing a sensed spark output signal in response thereto; e. first fuel control means operatively connected to receive and responsive to said sensed spark output signal for providing a small amount of said volatile fuel for ignition by said spark, thereby forming a low flame; f. a flame sensor, operatively independent of said spark sensor, connected to sense the presence or absence of said flame for providing a sensed flame output signal in response thereto; g. second sensing means for sensing a single one of said plurality of operating quantities and for providing a single control signal indicative thereof; and h. second fuel control means operatively connected to receive and responsive to said sensed flame output signal and said single operating quantity control signal for providing a large amount of said volatile fuel for ignition by said low flame, thereby forming a high flame.
Claim 6
Dependent Claim
271 words
A failsafe burner control apparatus for controlling the supply and ignition of highly volatile and explosive fuel such as gasoline or jet fuel in a burner used within a larger system having a plurality of measurable operating quantities, comprising: a. first sensing means for sensing a plurality of said operating quantities and for respectively providing a plurality of control signals indicative thereof; b. means for forming a spark when energized; c. control means responsive to said plurality of operating quantity control signals and operatively connected to said spark forming means for energizing said spark forming means only when each of said plurality of operating quantities is within a predetermined range; d. a spark sensor mounted to directly visually sight the presence or absence of said spark for providing a sensed spark output signal in response thereto; e. first fuel control means operatively connected to receive and responsive to said sensed spark output signal for providing a small amount of said volatile fuel for ignition by said spark, thereby forming a low flame; f. a flame sensor, operatively independent of said spark sensor, connected to sense the presence or absence of said flame for providing a sensed flame output signal in response thereto; g. second sensing means for sensing a single one of said plurality of operating quantities and for providing a single control signal indicative thereof; and h. second fuel control means operatively connected to receive and responsive to said sensed flame output signal and said single operating quantity control signal for providing a large amount of said volatile fuel for ignition by said low flame, thereby forming a high flame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |