US3617159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-boiler igniting system
Assignee: Marley Wylain Co LLC
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Filing: 1969-08-15
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Granted: 1971-11-02
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Expires: 1989-08-15
Abstract
Abstract An ignition system for a gas-fired boiler is provided in which electrical circuitry is utilized in a novel matter to consecutively initiate and terminate several stages in the ignition of the boiler burners. Fuel is initially supplied to a multiport pilot burner, is ignited, and the existence of the flame across the entire length of the multiport pilot burner is positively assured by an ultraviolet flame-sensing means. Next, the flow of fuel to the main burner is initiated, and after a predetermined time, the fuel flow to the multiport pilot burner is halted, thereby extinguishing the multiport pilot burner flame. The above-discussed sensing means is then used to supervise and insure that main burner flame is present. Fuel supply to the main burner is cut off in response to an indication by the sensing means that main burner flame is not present.
Inventors
- 👤 William C Arndt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:17
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
The method of initiating and insuring the presence of flame in a boiler having a plurality of burner assemblies, each assembly having a plurality of main burners, at least one multiport pilot burner having two ends and extending across a plurality of the burners in an assembly, and flame sensing means, comprising the steps of: initiating pilot burner gas flame, propagating the pilot burner flame from end to end along the length of the pilot burner, sensing pilot burner flame at one end of the pilot burner, initiating main burner gas flow in a main burner assembly in response to the sensed presence of pilot burner flame at said one end, terminating gas flow to the pilot burner and extinguishing the pilot burner flame after a predetermined elapsed time while simultaneously initiating gas flow in adjacent burner assemblies, sensing continually thereafter the presence of main burner flame by said flame sensing means, and terminating gas flow to all main burners in the absence of sensed main burner flame.
Claim 2
Independent Claim
168 words
The method of initiating and insuring the presence of flame in a boiler having a plurality of burner assemblies, each assembly having a plurality of main burners, at least one multiport pilot burner having two ends and extending across a plurality of the burners in an assembly, and flame sensing means, comprising the steps of: initiating pilot burner gas flame, propagating the pilot burner flame from end to end along the length of the pilot burner, sensing pilot burner flame at one end of the pilot burner, initiating main burner gas flow in a main burner assembly in response to the sensed presence of pilot burner flame at said one end, terminating gas flow to the pilot burner and extinguishing the pilot burner flame after a predetermined elapsed time while simultaneously initiating gas flow in adjacent burner assemblies, sensing continually thereafter the presence of main burner flame by said flame sensing means, and terminating gas flow to all main burners in the absence of sensed main burner flame.
Claim 3
Dependent Claim
62 words
A method according to claim 1 including the step of sensing ultraviolet radiation emanating from the pilot burner flame at one end of the pilot burner, and further including the step of sensing continually the presence of ultraviolet radiation emanating from a point behind said pilot burner opposite that side of the pilot burner upon which said pilot burner parts are disposed.
Claim 4
Dependent Claim
33 words
A method according to claim 1 including the step of igniting said pilot burner flame at an end of said pilot burner opposite said one end where said pilot burner flame is sensed.
Claim 5
Dependent Claim
182 words
In a boiler having at least one assembly of a plurality of main burners, each burner having a plurality of burner ports, the combination comprising: at least one pilot burner having a plurality of ports and extending across a plurality of burners in the assembly, means for producing gas flow in the pilot burner for a predetermined time period only, ultraviolet radiation sensing means positioned behind the pilot burner so that the ports of said pilot burner are disposed upon an opposite pilot burner side, for determining the presence of a flame upon the pilot burner and for emitting a signal in a response thereto, so as to sense the presence of flame upon the main burner after termination of the pilot burner flame and further being capable of emitting a signal in response to the sensed presence of main burner flame, means for initiating gas flow in the main burner in response to the sensing means signal so as to cause flame upon the main burner, and means for halting main burner gas flow in the absence of main burner flame.
Claim 6
Dependent Claim
182 words
In a boiler having at least one assembly of a plurality of main burners, each burner having a plurality of burner ports, the combination comprising: at least one pilot burner having a plurality of ports and extending across a plurality of burners in the assembly, means for producing gas flow in the pilot burner for a predetermined time period only, ultraviolet radiation sensing means positioned behind the pilot burner so that the ports of said pilot burner are disposed upon an opposite pilot burner side, for determining the presence of a flame upon the pilot burner and for emitting a signal in a response thereto, so as to sense the presence of flame upon the main burner after termination of the pilot burner flame and further being capable of emitting a signal in response to the sensed presence of main burner flame, means for initiating gas flow in the main burner in response to the sensing means signal so as to cause flame upon the main burner, and means for halting main burner gas flow in the absence of main burner flame.
Claim 7
Dependent Claim
144 words
In a gas-fired heater having a main burner assembly including a plurality of multiport main burners, at least one multiport pilot burner extending across a plurality of main burners for igniting main burner gas flow, and At least one ignition means for igniting pilot burner gas flow, the improvement comprising: ultraviolet radiation sensing means positioned behind the pilot burner so that the ports of said pilot burner are disposed upon an opposite pilot burner side for sensing the presence of pilot burner flame and for emitting a main burner gas flow initiating signal in response thereto, the ultraviolet radiation sensing means further sensing the presence of main burner flame after the extinguishment of said pilot burner flame, and means for terminating main gas burner flow in response to the absence of any sensed main burner flame after the extinguishment of the pilot burner flame.
Claim 8
Dependent Claim
144 words
In a gas-fired heater having a main burner assembly including a plurality of multiport main burners, at least one multiport pilot burner extending across a plurality of main burners for igniting main burner gas flow, and At least one ignition means for igniting pilot burner gas flow, the improvement comprising: ultraviolet radiation sensing means positioned behind the pilot burner so that the ports of said pilot burner are disposed upon an opposite pilot burner side for sensing the presence of pilot burner flame and for emitting a main burner gas flow initiating signal in response thereto, the ultraviolet radiation sensing means further sensing the presence of main burner flame after the extinguishment of said pilot burner flame, and means for terminating main gas burner flow in response to the absence of any sensed main burner flame after the extinguishment of the pilot burner flame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |