US3792959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for igniting a burner
Assignee: Volcano Co Ltd
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Filing: 1971-12-29
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Granted: 1974-02-19
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Expires: 1991-12-29
Abstract
Abstract A method of igniting a burner in a short period of time. An igniting device is used which has a heating element made of carborundum provided in an outer pipe which is provided movably in the burner. An electric source initially impresses upon the heating element a voltage approximately 1.5 times its rated voltage and the electric current at the secondary side of the transformer at the time when the heating element has reached the desired temperature is detected by a current relay. At this time, taps on the transformer are switched to impress the rated voltage on the element to obtain the desired igniting temperature.
Inventors
- 👤 K Mori
- 👤 T Toue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:47
CPC Classifications
F; F23; F23Q; F23Q7/00; F23Q7/14; F23Q7/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A method of igniting a burner with an igniting device utilizing a carborundum heating element comprising the steps of initially supplying said heating element with a first voltage approximately equal to one and one-half times the rated voltage of said element, sensing the electric current passing through said element, supplying said heating element with a second voltage substantially equal to the rated voltage of said element when said current reaches a predetermined value, said predetermined current value corresponding to a predetermined temperature of said heating element.
Claim 2
Independent Claim
86 words
A method of igniting a burner with an igniting device utilizing a carborundum heating element comprising the steps of initially supplying said heating element with a first voltage approximately equal to one and one-half times the rated voltage of said element, sensing the electric current passing through said element, supplying said heating element with a second voltage substantially equal to the rated voltage of said element when said current reaches a predetermined value, said predetermined current value corresponding to a predetermined temperature of said heating element.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein said steps of supplying said voltages comprises providing a transformer having a primary winding with an intermediate tap and a secondary winding, and connecting said secondary winding across said heating element.
Claim 4
Dependent Claim
25 words
The method of claim 2 wherein said step of supplying said first voltage comprises connecting a voltage source to said intermediate tap of said transformer.
Claim 5
Dependent Claim
26 words
The method of claim 3 wherein the step of sensing the electric current passing through said element comprises sensing the current flowing through said secondary winding.
Claim 6
Independent Claim
82 words
A device for igniting a burner comprising a hollow pipe member and a terminal casing supporting said pipe member at one end of said pipe member, a carborundum heating element located within said pipe member adjacent the other end thereof, means supporting said heating element, a closure means closing said other end of said pipe member, at least one hole formed in the wall of said pipe member adjacent said heating element and means for supplying electric power to said heating element.
Claim 7
Independent Claim
82 words
A device for igniting a burner comprising a hollow pipe member and a terminal casing supporting said pipe member at one end of said pipe member, a carborundum heating element located within said pipe member adjacent the other end thereof, means supporting said heating element, a closure means closing said other end of said pipe member, at least one hole formed in the wall of said pipe member adjacent said heating element and means for supplying electric power to said heating element.
Claim 8
Dependent Claim
83 words
The device of claim 5 wherein said means for supplying electric power to said heating element comprises means for supplying a first voltage to said heating element, said first voltage being equal to approximately one and one-half times the rated voltage of the element, means for sensing the current flowing through said element, and means for supplying a second voltage to said element when said current reaches a predetermined value, said second voltage being substantially equal to the rated voltage of said element.
Claim 9
Dependent Claim
35 words
The device of claim 6 wherein said means for supplying said first and second voltages comprises a transformer having a tapped primary winding, the secondary winding of said transformer being connected to said heating element.
Claim 10
Dependent Claim
52 words
The device of claim 7 wherein said means for sensing said current coMprises a current relay, said relay being adapted to be activated when said current reaches said predetermined value, said relay carrying switching means connected to said primary winding for changing the taps thereof when said current reaches said predetermined value.
Claim 11
Dependent Claim
11 words
The device of claim 8 wherein said pipe member is cylindrical.
Claim 12
Dependent Claim
67 words
The device of claim 9 wherein said support means comprises an elongated support member secured to said one end of said pipe member and extending coaxially within said pipe toward said closure member at said other end of said pipe, a recess formed in the end of said supporting member and a recess formed in said closure member, said heating element being supported between said two recesses.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |