Patent US1912535A successfully refreshed from Google Patents.
Patent US3862820A successfully refreshed from Google Patents.
US3862820A
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US
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Direct burner ignition system
Assignee: Eaton Corp
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Filing: 1974-01-16
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Granted: 1975-01-28
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Expires: 1994-01-16
Abstract
Abstract A direction ignition system is provided for a valve controlled ignition system. The system utilizes an electrically actuated electromagnetic valve means connected between the fuel burner and a fuel supply. The valve means has an armature and includes means for biasing the armature in a normally closed position. The biasing means is adjustable and force-calibrated to prevent actuation of the valve means at less than a minimum voltage drop thereacross. The system also includes a fuel ignition element, electrically in series with the electromagnetic valve means, which reaches fuel ignition temperature in response to a predetermined current flow. Alternatively, there may be provided an electrically actuated thermal valve, fluidically in series with the electromagnetic valve means, and electrically in series with the fuel ignition element. The electromagnetic valve means is then in parallel electrically with the thermal valve and ignition element.
Inventors
- 👤 Melvin E Hantack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:58
CPC Classifications
F; F23; F23Q; F23Q7/00; F23Q7/06; F23Q7/10; F23Q7/12; F16; F16K; F16K31/00; F16K31/02; F16K31/025; F23Q7/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
136 words
A direct ignition system for a valve controlled fuel burner comprising: a. an electrically actuated thermal valve connected between said fuel burner and a fuel supply; b. electromagnetic valve means fluidically in series with said thermal valve, said valve means having an armature and including means for biasing said armature in a normally closed position, said biasing means preventing actuation of said valve means at less than a minimum voltage drop across said valve means; c. means providing a fuel ignition element proximate to the outlet of said burner, said fuel ignition element reaching fuel ignition temperature in response to a predetermined current flow therethrough; and d. parallel electric circuit means operating i. said thermal valve in response to a fuel ignition temperature being present in said fuel ignition element, and ii. said electromagnetic valve means.
Claim 2
Dependent Claim
136 words
A direct ignition system for a valve controlled fuel burner comprising: a. an electrically actuated thermal valve connected between said fuel burner and a fuel supply; b. electromagnetic valve means fluidically in series with said thermal valve, said valve means having an armature and including means for biasing said armature in a normally closed position, said biasing means preventing actuation of said valve means at less than a minimum voltage drop across said valve means; c. means providing a fuel ignition element proximate to the outlet of said burner, said fuel ignition element reaching fuel ignition temperature in response to a predetermined current flow therethrough; and d. parallel electric circuit means operating i. said thermal valve in response to a fuel ignition temperature being present in said fuel ignition element, and ii. said electromagnetic valve means.
Claim 3
Dependent Claim
28 words
A direct ignition system as set forth in claim 1 wherein said electromagnetic valve means is a solenoid valve and said biasing means includes a helical compression spring.
Claim 4
Dependent Claim
27 words
A direct ignition system as set forth in claim 2 wherein said biasing means includes means to adjust the voltage drop required to actuate said valve means.
Claim 5
Dependent Claim
34 words
A direct ignition system as set forth in claim 3 wherein said adjustment means includes an adjustable threaded member providing a seat for said spring, said threaded member being oppositely disposed from said armature.
Claim 6
Dependent Claim
36 words
A direct ignition system as set forth in claim 1 wherein said fuel ignition element is a variable resistance means electrically in series with said thermal valve and electrically in parallel with said electromagnetiC valve means.
Claim 7
Dependent Claim
19 words
A direct ignition system as set forth in claim 5 wherein said ignition element is a negative slope thermistor.
Claim 8
Dependent Claim
45 words
A direct ignition system as set forth in claim 1 including: an electrical power source; and a manual switch series connected to said parallel circuit means to control the connection of said electrical power source to said parallel circuit means and said fuel ignition element.
Claim 9
Dependent Claim
31 words
A direct ignition system as set forth in claim 1 wherein said fuel ignition element includes a negative resistance thermistor having a fuel ignition temperature when a predetermined current flows therethrough.
Claim 10
Dependent Claim
45 words
A direct ignition system as set forth in claim 1 wherein said parallel circuit means includes a substantially constant resistance heater mounted to said thermal valve to control the opening of said thermal valve in response to said predetermined current flowing through said resistance heater.
Claim 11
Independent Claim
125 words
A system for igniting a fuel burner comprising: a. electromagnetic valve means connected between said fuel burner and a fuel supply, said valve means including an armature selectively movable between a position opening said valve means and a position closing said valve means, said valve means further including means for biasing said armature to prevent opening of said valve means at less than a minimum voltage drop across said valve means; b. means providing a fuel ignition element proximate to the outlet of said burner, said fuel ignition element reaching fuel ignition temperature in response to a predetermined current flow therethrough; and c. said biasing means includes a helical compression spring and means to adjust the voltage drop required to actuate said electromagnetic valve means.
Claim 12
Independent Claim
125 words
A system for igniting a fuel burner comprising: a. electromagnetic valve means connected between said fuel burner and a fuel supply, said valve means including an armature selectively movable between a position opening said valve means and a position closing said valve means, said valve means further including means for biasing said armature to prevent opening of said valve means at less than a minimum voltage drop across said valve means; b. means providing a fuel ignition element proximate to the outlet of said burner, said fuel ignition element reaching fuel ignition temperature in response to a predetermined current flow therethrough; and c. said biasing means includes a helical compression spring and means to adjust the voltage drop required to actuate said electromagnetic valve means.
Claim 13
Dependent Claim
23 words
A system as set forth in claim 10 wherein said ignition element includes variable resistance means electrically in series with said valve means.
Claim 14
Dependent Claim
17 words
A system as set forth in claim 11 wherein said ignition element is a negative slope thermistor.
Claim 15
Dependent Claim
32 words
A system as set forth in claim 10 wherein said adjustment means includes an adjustable threaded member providing a seat for said spring, said threaded member being oppositely disposed from said armature.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |