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US4089632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel control safety apparatus
Assignee: Individual
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Filing: 1976-09-01
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Granted: 1978-05-16
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Expires: 1996-09-01
Abstract
Abstract A thermocouple is connected to a fuel control valve which automatically feeds fuel to the burner of a gas or oil appliance when activated by a current generated by the thermocouple due to heat produced by the burner. A fusible link safety device having an electrically non-conducting base and containing a fusible filament adapted to melt at a predetermined temperature is located above and in front of the burner. The fusible link safety device is electrically connected in series with the thermocouple and the fuel control valve such that when the predetermined temperature of the fusible filament is attained thereby melting the filament, the electrical circuit from the thermocouple to the fuel control valve is broken thereby deactivating the fuel control valve and shutting off the flow of fuel to the burner.
Inventors
- 👤 Basil E. Rexroad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:37
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/107
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
177 words
A fuel control safety apparatus for preventing continued overfiring of a burner means comprising: thermocouple means adapted to generate an electrical current in response to temperature; fuel control means adapted to automatically feed fuel to said burner means when activated by the current from said thermocouple means; fusible link safety means having a fusible filament adapted to melt at a predetermined temperature, said fusible link safety means being disposed above and in front of said burner means; and, circuit means connecting the fusible filament of said fusible link safety means in series with said thermocouple means and said fuel control means such that when said predetermined temperature is attained and said fusible filament melts, the electrical current from said thermocouple means to said fuel control means ceases thereby deactivating said fuel control means and stopping the flow of fuel to said burner means; wherein said thermocouple means is physically connected to said fuel control means by a threaded electrical insulating means surrounding said thermocouple to prevent direct grounding of said thermocouple means to said fuel control means.
Claim 2
Dependent Claim
177 words
A fuel control safety apparatus for preventing continued overfiring of a burner means comprising: thermocouple means adapted to generate an electrical current in response to temperature; fuel control means adapted to automatically feed fuel to said burner means when activated by the current from said thermocouple means; fusible link safety means having a fusible filament adapted to melt at a predetermined temperature, said fusible link safety means being disposed above and in front of said burner means; and, circuit means connecting the fusible filament of said fusible link safety means in series with said thermocouple means and said fuel control means such that when said predetermined temperature is attained and said fusible filament melts, the electrical current from said thermocouple means to said fuel control means ceases thereby deactivating said fuel control means and stopping the flow of fuel to said burner means; wherein said thermocouple means is physically connected to said fuel control means by a threaded electrical insulating means surrounding said thermocouple to prevent direct grounding of said thermocouple means to said fuel control means.
Claim 3
Dependent Claim
192 words
A fuel control safety apparatus for preventing continued overfiring of a burner means comprising: thermocouple means adapted to generate an electrical current in response to temperture; fuel control means adapted to automatically feed fuel to said burner means when activated by the current from said thermocouple means; fusible link safety means having a fusible filament adapted to melt at a predetermined temperature, said fusible link safety means being disposed above and in front of said burner means; and, circuit means connecting the fusible filament of said fusible link safety means in series with said thermocouple means and said fuel conrol means such that when said predetermined temperature is attained and said fusible filament melts, the electrical current from said thermocouple means to said fuel control means ceases during thereby deactivating said fuel control means and stopping the flow of fuel to said burner means; wherein said thermocouple means is physically connected to said fuel control means in a manner to prevent direct grounding of said thermocouple means to said fuel control means; wherein a plastic bolt connection means secures and prevents the grounding of said thermocouple means to said fuel control means.
Claim 4
Dependent Claim
192 words
A fuel control safety apparatus for preventing continued overfiring of a burner means comprising: thermocouple means adapted to generate an electrical current in response to temperture; fuel control means adapted to automatically feed fuel to said burner means when activated by the current from said thermocouple means; fusible link safety means having a fusible filament adapted to melt at a predetermined temperature, said fusible link safety means being disposed above and in front of said burner means; and, circuit means connecting the fusible filament of said fusible link safety means in series with said thermocouple means and said fuel conrol means such that when said predetermined temperature is attained and said fusible filament melts, the electrical current from said thermocouple means to said fuel control means ceases during thereby deactivating said fuel control means and stopping the flow of fuel to said burner means; wherein said thermocouple means is physically connected to said fuel control means in a manner to prevent direct grounding of said thermocouple means to said fuel control means; wherein a plastic bolt connection means secures and prevents the grounding of said thermocouple means to said fuel control means.
Claim 5
Dependent Claim
27 words
The apparatus according to claim 2, wherein said fuel control means comprises a fuel control valve for automatically regulating the flow of fuel to said burner means.
Claim 6
Dependent Claim
31 words
The apparatus according to claim 2 wherein said fuel control means comprises an electrical relay to a fuel control valve for automatically regulating the flow of fuel to said burner means.
Claim 7
Dependent Claim
40 words
The apparatus according to claim 2 wherein said fusible link safety means comprises a low melting metal filament adapted to melt at a predetermined temperature and secured to a plastic base, said filament being connected directly to said circuit means.
Claim 8
Dependent Claim
56 words
The apparatus according to claim 2 wherein said circuit means comprises first and second conductors, said first conductor being connected to the exterior of said thermocouple means and to one end of said fusible filament, and said second conductor being connected to the second end of said fusible filament and grounded to said fuel control means.
Claim 9
Dependent Claim
154 words
A fuel control safety link device for an appliance having a burner, a thermocouple adapted to generate an electrical current in response to temperature, and a fuel control valve for automatically feeding fuel to the burner when activated by the current from said thermocouple, said fuel control safety link device comprising a fusible link safety means having a fusible filament adapted to melt at a predetermined temperature and disposed in front of and above said burner, a threaded electrical insulating means surrounding and mounting said thermocouple means on said fuel control valve for preventing grounding of said thermocouple to said fuel control valve, and circuit means connecting said fusible filament in series with said thermocouple and said fuel control valve such that when said predetermined temperature is attained and said filament melts, the electrical current from said thermocouple ceases thereby deactivating said fuel control valve and stopping the flow of fuel to said burner.
Claim 10
Dependent Claim
154 words
A fuel control safety link device for an appliance having a burner, a thermocouple adapted to generate an electrical current in response to temperature, and a fuel control valve for automatically feeding fuel to the burner when activated by the current from said thermocouple, said fuel control safety link device comprising a fusible link safety means having a fusible filament adapted to melt at a predetermined temperature and disposed in front of and above said burner, a threaded electrical insulating means surrounding and mounting said thermocouple means on said fuel control valve for preventing grounding of said thermocouple to said fuel control valve, and circuit means connecting said fusible filament in series with said thermocouple and said fuel control valve such that when said predetermined temperature is attained and said filament melts, the electrical current from said thermocouple ceases thereby deactivating said fuel control valve and stopping the flow of fuel to said burner.
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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |