US3853455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner control apparatus
Assignee: BLOOM-1 Inc A CORP OF
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Filing: 1973-09-24
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Granted: 1974-12-10
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Expires: 1993-09-24
Abstract
Abstract Disclosed is a d.c. powered burner control system having a fuel valve controlled by a micro-power oscillator exclusively powered by energy present in electrical current rectified by flame emanating from the burner. A d.c. to a.c. inverter controlled by the oscillator converts the d.c. supply into an a.c. signal applied across a region occupied by flames emanating from the burner which flame rectifies the a.c. signal to thereby produce the negative flame signal required to power the oscillator. Preferably a capacitor stores energy present in the flame rectifier current and provides operating power to the oscillator, the output of which maintains the fuel valve in an open position.
Inventors
- 👤 W Riordan
- 👤 G Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:56
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/12; F23N5/123; F23N5/20; F23N5/203; F23N2223/00; F23N2223/22; F23N2223/26; F23N2227/00; F23N2227/36; F23N2229/00; F23N2229/12; F23N2231/00; F23N2231/06; F23N2231/10; F23N2231/12; F23N2235/00; F23N2235/12; F23N2235/14; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
Burner control circuit apparatus comprising: valve means for controlling the flow of fuel to a burner; flame sensor means for providing a source of power in response to the presence of flame at the burner; oscillator means connected to receive power from said flame sensor means and to produce an oscillating signal in response thereto; and valve control means for opening said valve in response to said oscillating signal.
Claim 2
Dependent Claim
69 words
Burner control circuit apparatus comprising: valve means for controlling the flow of fuel to a burner; flame sensor means for providing a source of power in response to the presence of flame at the burner; oscillator means connected to receive power from said flame sensor means and to produce an oscillating signal in response thereto; and valve control means for opening said valve in response to said oscillating signal.
Claim 3
Dependent Claim
60 words
Apparatus according to claim 1 including electrode means defining a gap in the region occupied by flame generated by the burner, source means for applying an a.c. signal to said electrode means, and wherein said flame sensor means comprises energy storage means connected to said electrode means and adapted to store the energy carried by current rectified by the flame.
Claim 4
Dependent Claim
34 words
Apparatus according to claim 2 wherein said energy storage means comprises flame capacitor means connected to be charged by the current rectified by the flame and to supply operating power to said oscillator means.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 3 wherein said oscillator means comprises amplifier means for amplifying said oscillating signal.
Claim 6
Dependent Claim
29 words
Apparatus according to claim 3 including a d.c. supply means and wherein said source means comprises an inverter means for producing said a.c. signal from said d.c. supply means.
Claim 7
Dependent Claim
26 words
Apparatus according to claim 5 wherein said inverter is controlled by said oscillating signal, and said oscillating signal has a frequency substantially greater than 60 Hz.
Claim 8
Dependent Claim
45 words
Apparatus according to claim 6 wherein said inverter means comprises a transformer having a primary winding, and an electronic switch operable to provide power to said primary winding from said d.c. supply means, and wherein said electronic switch means is controlled by said oscillating signal.
Claim 9
Dependent Claim
46 words
Apparatus according to claim 6 including a spark generating means for providing sparks to ignite fuel emanating from the burner, said spark generating means comprising a spark transformer and a converter means for converting said a.c. signal into a d.c. ignition supply for said spark transformer.
Claim 10
Dependent Claim
37 words
Apparatus according to claim 8 wherein said converter means comprises ignition storage capacitor means for storing electrical energy, and an ignition switching means for discharging said storage capacitor means into the primary winding of said spark transforMer.
Claim 11
Dependent Claim
34 words
Apparatus according to claim 9 including leakage circuit means for discharging said ignition storage capacitor, said leakage means including an open circuit portion disposed so as to be closed by flame at the burner.
Claim 12
Dependent Claim
13 words
Apparatus according to claim 3 wherein said oscillator means is a micro-power oscillator.
Claim 13
Dependent Claim
116 words
Apparatus according to claim 1 wherein said oscillator means requires an input signal of a given polarity, and including d.c. power supply of a polarity opposite to said given polarity with respect to circuit common, power supply capacitor means having one end coupled to said oscillator means, sequential switching means operable in a first state to connect said d.c. supply to an opposite end of said supply capacitor means so as to induce charging thereof and operable in a second state to connect said circuit common to said opposite end so as to induce discharge of said supply capacitor means into said load, and switch control means for changing the state of said sequential switching means.
Claim 14
Dependent Claim
28 words
Apparatus according to claim 12 wherein said switch control means comprises timing means for maintaining said sequential switching means in said first state for a predetermined charging period.
Claim 15
Dependent Claim
40 words
Apparatus according to claim 13 wherein said sequential switching means comprises a differential current amplifier with one input connected to said d.c. supply, a second input connected to said timing means and an output connected to said supply capacitor means.
Claim 16
Dependent Claim
13 words
Apparatus according to claim 14 wherein said timing means comprises an R.C. timer.
Claim 17
Dependent Claim
22 words
Apparatus according to claim 14 including resistor means connected to said supply capacitor means for controlling the discharge rate into said load.
Claim 18
Dependent Claim
31 words
Apparatus according to claim 16 including blocking means for preventing the flow of energy from said supply capacitor to said circuit common with said sequential switching means in said second state.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |