US3301308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety control for portable heaters and like equipment
Assignee: Koehring Co
•
Filing: 1965-09-08
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Granted: 1967-01-31
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Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:47
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N2233/00; F23N2233/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN A SAFETY CONTROL CIRCUIT FOR A SPACE HEATER OR LIKE EQUIPMENT INCLUDING A HOUSING HAVING MEANS FORMING THEREIN A COMBUSTION CHAMBER HAVING OPPOSITE ENDS, ONE END BEING OPEN TO ATMOSPHERE, SYPHON NOZZLE MEANS AT THE OPPOSITE END, MEANS FOR CAUSING DELIVERY OF FUEL THROUGH SAID NOZZLE ACTIVATED BY A POWER MEANS, MEANS FOR BLOWING SECONDARY AIR THROUGH SAID HOUSING FROM SAID OPPOSITE END TOWARD AND THROUGH SAID ONE END, A MAIN CIRCUIT SEGMENT FOR DELIVERY OF POWER TO SAID POWER MEANS, SAID HOUSING HAVING A LATERAL OPENING NEAR SAID OPPOSITE END, LIGHT SENSITIVE MEANS MOUNTED TO SIGHT THROUGH SAID OPENING FOR THE PRESENCE OR ABSENCE OF FLAME LIGHT IN SAID COMBUSTION CHAMBER, SAID LIGHT SENSITIVE MEANS PROVIDING INCREASED ELECTRICAL RESISTANCE IN RESPONSIVE EITHER TO EXTINGUISHING OF THE FLAME OR TO A PROJECTING FORWARD OF THE FLAME IN THE CHAMBER DUE TO INSUFFICIENT SECONDARY AIR, THE FLAME BEING NORMALLY IN THE SAID OPPOSITE END OF SAID CHAMBER IN LINE WITH SAID LATERAL
Claim 2
Dependent Claim
162 words
IN A SAFETY CONTROL CIRCUIT FOR A SPACE HEATER OR LIKE EQUIPMENT INCLUDING A HOUSING HAVING MEANS FORMING THEREIN A COMBUSTION CHAMBER HAVING OPPOSITE ENDS, ONE END BEING OPEN TO ATMOSPHERE, SYPHON NOZZLE MEANS AT THE OPPOSITE END, MEANS FOR CAUSING DELIVERY OF FUEL THROUGH SAID NOZZLE ACTIVATED BY A POWER MEANS, MEANS FOR BLOWING SECONDARY AIR THROUGH SAID HOUSING FROM SAID OPPOSITE END TOWARD AND THROUGH SAID ONE END, A MAIN CIRCUIT SEGMENT FOR DELIVERY OF POWER TO SAID POWER MEANS, SAID HOUSING HAVING A LATERAL OPENING NEAR SAID OPPOSITE END, LIGHT SENSITIVE MEANS MOUNTED TO SIGHT THROUGH SAID OPENING FOR THE PRESENCE OR ABSENCE OF FLAME LIGHT IN SAID COMBUSTION CHAMBER, SAID LIGHT SENSITIVE MEANS PROVIDING INCREASED ELECTRICAL RESISTANCE IN RESPONSIVE EITHER TO EXTINGUISHING OF THE FLAME OR TO A PROJECTING FORWARD OF THE FLAME IN THE CHAMBER DUE TO INSUFFICIENT SECONDARY AIR, THE FLAME BEING NORMALLY IN THE SAID OPPOSITE END OF SAID CHAMBER IN LINE WITH SAID LATERAL
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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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |