Patent US3765820A successfully refreshed from Google Patents.
US3765820A
Expired / Lapsed
US
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Combustion apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1972-08-31
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Granted: 1973-10-16
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Expires: 1992-08-31
Abstract
Abstract Combustion apparatus having a luminous element disposed within, and projecting above, a combustion plate. The light emitted by the luminous element, which will depend upon the state of combustion, is detected by a light detector, which through appropriate electronic circuitry containing various electronic components, will operate to control the air supply to the combustion housing whereby a proper combustible mixture for stable combustion is constantly being maintained. In like manner, the fuel supply may be controlled, in lieu of controlling the air supply.
Inventors
- 👤 T Ito
- 👤 T Nomaguichi
- 👤 M Sakai
- 👤 K Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:25
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23D; F23D14/00; F23D14/46; F23D14/72; F23D14/725; F23N2233/00; F23N2233/06; F23N2233/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
Combustion apparatus comprising: a fuel supplier for supplying fuel to said combustion apparatus; an air supplier for supplying air to said combustion apparatus; a mixing chamber for mixing said fuel and air supplied to said apparatus; a combustion plate for igniting said fuel and air mixture within a combustion chamber; a luminous element disposed within said combustion plate, said luminous element emitting light in an amount which is directly proportional to the amount of heat of combustion received by said element; a light detector for detecting said light emitted from said luminous element; and a control means electronically connected to said light detector for controlling the amount of air supplied by said air supplier.
Claim 2
Dependent Claim
114 words
Combustion apparatus comprising: a fuel supplier for supplying fuel to said combustion apparatus; an air supplier for supplying air to said combustion apparatus; a mixing chamber for mixing said fuel and air supplied to said apparatus; a combustion plate for igniting said fuel and air mixture within a combustion chamber; a luminous element disposed within said combustion plate, said luminous element emitting light in an amount which is directly proportional to the amount of heat of combustion received by said element; a light detector for detecting said light emitted from said luminous element; and a control means electronically connected to said light detector for controlling the amount of air supplied by said air supplier.
Claim 3
Dependent Claim
40 words
Combustion apparatus as set forth in claim 1, wherein said combustion plate contains a plurality of flame holes and separates said mixing chamber from said combustion chamber, and wherein said luminous element projects from said plate into said combustion chamber.
Claim 4
Dependent Claim
68 words
Combustion apparatus as set forth in claim 1, wherein said control means comprises: an amplifier for amplifying a signal emitted by said light detector; a thyristor short angle control circuit for receiving said amplified signal; and a bidirectional thyristor for receiving a signal from said thyristor short angle control circuit for controlling the electric current of an AC power source which in turn electronically controls said air supplier.
Claim 5
Dependent Claim
68 words
Combustion apparatus as set forth in claim 2, wherein said control means comprises an amplifier for amplifying a signal emitted by said light detector; a thyristor short angle control circuit for receiving said amplified signal; and a bidirectional thyristor for receiving a signal from said thyristor short angle control circuit for controlling the electric current of an AC power source which in turn electronically controls said air supplier.
References Cited (Backward Citations)
US3193199A
Cited
US3304989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |