US3840322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control circuitry
Assignee: Fireye Inc
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Filing: 1974-01-11
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Granted: 1974-10-08
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Expires: 1994-01-11
Abstract
Abstract Burner control apparatus includes lockout apparatus for deenergizing the control apparatus comprising a switch and an actuator for operating the switch after a time delay, first and second alternate lockout actuator energizing paths, a control device for actuating the ignition control means, and a timing circuit for providing an ignition timing interval of precise duration. The timing circuit is actuated in response to a request for burner operation and one of the lockout actuator energizing paths is completed in response to the actuated timing circuit. The control device is maintained energized if a signal from the flame sensor is received before the end of the ignition timing interval, and the control device is de-energized and a lockout actuator energizing path is completed in the absence of a signal from the flame sensor.
Inventors
- 👤 P Cade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:52
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N5/20; F23N5/203; F23N2227/00; F23N2227/04; F23N2227/28; F23N2227/30; F23N2229/00; F23N2233/00; F23N2233/06
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
195 words
Burner control apparatus for use with a fuel burner installation having an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in said fuel burner installation, and means responsive to said burner control apparatus for controlling fuel flow and fuel ignition, said burner control apparatus comprising lockout apparatus for de-energizing said control apparatus comprising a switch and an actuator for operating said switch after a time delay, first and second alternate lockout actuator energizing paths, a control device for actuating said ignition control means, a timing circuit for providing an ignition timing interval of precise duration, means responsive to a request for burner operation to initiate an ignition sequence by actuating said timing circuit, circuitry responsive to said actuated timing circuit for energizing said control device and completing one of said lockout actuator energizing paths, means responsive to a signal from said flame sensor to maintain said control device energized, and means responsive to the end of said ignition timing interval to de-energize said control device and to complete a lockout actuator energizing path in the absence of a signal from said flame sensor.
Claim 2
Dependent Claim
195 words
Burner control apparatus for use with a fuel burner installation having an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in said fuel burner installation, and means responsive to said burner control apparatus for controlling fuel flow and fuel ignition, said burner control apparatus comprising lockout apparatus for de-energizing said control apparatus comprising a switch and an actuator for operating said switch after a time delay, first and second alternate lockout actuator energizing paths, a control device for actuating said ignition control means, a timing circuit for providing an ignition timing interval of precise duration, means responsive to a request for burner operation to initiate an ignition sequence by actuating said timing circuit, circuitry responsive to said actuated timing circuit for energizing said control device and completing one of said lockout actuator energizing paths, means responsive to a signal from said flame sensor to maintain said control device energized, and means responsive to the end of said ignition timing interval to de-energize said control device and to complete a lockout actuator energizing path in the absence of a signal from said flame sensor.
Claim 3
Dependent Claim
35 words
The apparatus as claimed in claim 1 wherein said first lockout actuator energizing path includes a solid state switching device responsive To said timing circuit for completing said first path during said ignition timing interval.
Claim 4
Dependent Claim
22 words
The apparatus as claimed in claim 1 wherein said timing circuit includes an RC timing network to produce said ignition timing interval.
Claim 5
Dependent Claim
51 words
The apparatus as claimed in claim 1 and further including a second timing circuit for providing a pre-ignition timing interval of precise duration and wherein said request responsive means actuates said second timing circuit and said ignition timing interval is initiated in response to the end of said pre-ignition timing interval.
Claim 6
Dependent Claim
23 words
The apparatus as claimed in claim 4 wherein each said timing circuit includes an RC timing network to produce its respective timing interval.
Claim 7
Dependent Claim
56 words
The apparatus as claimed in claim 5 wherein said first and second timing circuits utilize a common capacitor, the timing interval of one of said timing circuits being a function of the charging of said common capacitor and the timing interval of the other timing circuit being a function of the discharging of said common capacitor.
Claim 8
Dependent Claim
44 words
The apparatus as claimed in claim 1 wherein said first lockout actuator energizing path includes a first solid state switching device responsive to said timing circuit for completing said first path throughout said ignition timing interval independent of a signal from said flame sensor.
Claim 9
Dependent Claim
52 words
The apparatus as claimed in claim 7 wherein said second lockout actuator energizing path includes a second solid state switching device responsive to said first solid state switching device for completing said second path in the absence of a signal from said flame sensor after the end of said ignition timing interval.
Claim 10
Dependent Claim
36 words
The apparatus as claimed in claim 8 and further including means responsive to said request for burner operation for causing said second solid state switch to complete said second path prior to said ignition timing interval.
Claim 11
Dependent Claim
56 words
The apparatus as claimed in claim 1 and further including a second control device responsive to a signal from said flame sensor for actuating a fuel control means, a normally open switch, and circuitry responsive to energization of said first control device for closing said switch to connect said first and second control devices in series.
Claim 12
Dependent Claim
34 words
The apparatus as claimed in claim 1 and further including inhibiting means responsive to said flame sensor signal prior to energization of said first control device for preventing energization of said first control device.
Claim 13
Dependent Claim
33 words
The apparatus as claimed in claim 11 wherein said inhibiting means includes a circuit connected between said second control device and said first timing circuit for preventing initiation of said ignition timing interval.
Claim 14
Dependent Claim
56 words
The apparatus as claimed in claim 11 and further including a second control device responsive to a signal from said flame sensor for actuating a fuel control means, a normally open switch, and circuitry responsive to energization of said first control device for closing said switch to connect said first and second control devices in series.
Claim 15
Dependent Claim
51 words
The apparatus as claimed in claim 13 and further including a second timing circuit for providing a pre-ignition timing interval of precise duration and wherein said request responsive means actuates said second timing circuit and said ignition timing interval is initiated in response to the end of said pre-ignition timing interval.
Claim 16
Dependent Claim
23 words
The apparatus as claimed in claim 14 wherein each said timing circuit includes an RC timing network to produce its respective timing interval.
Claim 17
Dependent Claim
44 words
The apparatus as claimed in claim 15 wherein said first lockout actuator energizing path includes a first solid state switching device responsive to said timing circuit for completing said first path throughout said ignition timing interval independent of a signal from said flame sensor.
Claim 18
Dependent Claim
52 words
The apparatus as claimed in claim 16 wherein said second lockout actuator energizing path includes a second solid state switching device responsive to said first solid state switchinG device for completing said second path in the absence of a signal from said flame sensor after the end of said ignition timing interval.
Claim 19
Dependent Claim
36 words
The apparatus as claimed in claim 17 and further including means responsive to said request for burner operation for causing said second solid state switch to complete said second path prior to said ignition timing interval.
Claim 20
Dependent Claim
33 words
The apparatus as claimed in claim 18 wherein said inhibiting means includes a circuit connected between said second control device and said first timing circuit for preventing initiation of said ignition timing interval.
Claim 21
Dependent Claim
56 words
The apparatus as claimed in claim 15 wherein said first and second timing circuits utilize a common capacitor, the timing interval of one of said timing circuits being a function of the charging of said common capacitor and the timing interval of the other timing circuit being a function of the discharging of said common capacitor.
Claim 22
Dependent Claim
33 words
The apparatus as claimed in claim 20 wherein said inhibiting means includes a circuit connected to said common capacitor for preventing charging of said one capacitor when said flame sensor signal is present.
Claim 23
Dependent Claim
191 words
Burner control apparatus for use with a fuel burner installation having an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in said fuel burner installation and means responsive to said burner control apparatus for and means responsive to said burner control apparatus for controlling fuel flow and fuel ignition, said burner control apparatus comprising a first actuator for actuating said fuel ignition control means, a second actuator for actuating said fuel flow control means, a normally open switch connected in series between said first actuator and said second actuator, fuel ignition control energizing circuitry responsive to a request for burner operation in the absence of a flame signal from said flame sensor for energizing said first actuator, switch closing circuitry responsive to energizing of said first actuator for closing said normally open switch, fuel flow control energizing circuitry responsive to said signal from the flame sensor when said switch is closed for energizing said second actuator, and inhibiting circuitry responsive to said signal from the flame sensor when said switch is open for preventing energization of said first actuator.
Claim 24
Dependent Claim
191 words
Burner control apparatus for use with a fuel burner installation having an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in said fuel burner installation and means responsive to said burner control apparatus for and means responsive to said burner control apparatus for controlling fuel flow and fuel ignition, said burner control apparatus comprising a first actuator for actuating said fuel ignition control means, a second actuator for actuating said fuel flow control means, a normally open switch connected in series between said first actuator and said second actuator, fuel ignition control energizing circuitry responsive to a request for burner operation in the absence of a flame signal from said flame sensor for energizing said first actuator, switch closing circuitry responsive to energizing of said first actuator for closing said normally open switch, fuel flow control energizing circuitry responsive to said signal from the flame sensor when said switch is closed for energizing said second actuator, and inhibiting circuitry responsive to said signal from the flame sensor when said switch is open for preventing energization of said first actuator.
Claim 25
Dependent Claim
190 words
Burner control apparatus for use with a fuel burner installation having an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in said fuel burner installation and means responsive to said burner control apparatus for controlling fuel flow and fuel ignition, said burner control apparatus comprising a first actuator for actuating said fuel ignition control means, a second actuator for actuating said fuel flow control means, fuel ignition control energizing circuitry responsive to a request for burner operation in the absence of a flame signal from said flame sensor for energizing said first actuator, fuel flow control energizing circuitry responsive to said signal from said flame sensor for energizing said second actuator, inhibiting circuitry responsive to said signal from said flame sensor prior to energization of said first actuator for preventing energizing of said first actuator, and time delay circuitry including an electrical energy storage device for producing a time delay, said time delay circuitry being operative in the absence of said signal from said flame sensor to de-energize said first actuator at the end of said time delay.
Claim 26
Dependent Claim
190 words
Burner control apparatus for use with a fuel burner installation having an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in said fuel burner installation and means responsive to said burner control apparatus for controlling fuel flow and fuel ignition, said burner control apparatus comprising a first actuator for actuating said fuel ignition control means, a second actuator for actuating said fuel flow control means, fuel ignition control energizing circuitry responsive to a request for burner operation in the absence of a flame signal from said flame sensor for energizing said first actuator, fuel flow control energizing circuitry responsive to said signal from said flame sensor for energizing said second actuator, inhibiting circuitry responsive to said signal from said flame sensor prior to energization of said first actuator for preventing energizing of said first actuator, and time delay circuitry including an electrical energy storage device for producing a time delay, said time delay circuitry being operative in the absence of said signal from said flame sensor to de-energize said first actuator at the end of said time delay.
Claim 27
Dependent Claim
75 words
Burner control apparatus as claimed in claim 23, said burner control apparatus further including a lock-out switch to shut down burner operation, a lock-out switch actuator to activate said lock-out switch after said lock-out switch actuator has been energized for a preset time period, and circuitry for energizing said lock-ouT switch actuator, said circuitry to become inoperative if fuel ignition is accomplished before said lock-out switch actuator has been energized for said preset time period.
Claim 28
Dependent Claim
22 words
Burner control apparatus as claimed in claim 24, said time delay circuitry including an RC timing network to produce said time delay.
Claim 29
Dependent Claim
30 words
Burner control apparatus as claimed in claim 25 further including an RC timing network for providing a time delay before said fuel ignition control energizing circuitry energizes said first actuator.
Claim 30
Dependent Claim
37 words
Burner control apparatus as claimed in claim 26 further including a normally open switch connected in series between said first actuator and said second actuator, said switch being closed in response to energization of said first actuator.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |