US3754853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual rate gaseous fuel burner assemblies
Assignee: Robertshaw Controls Co
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Filing: 1971-06-22
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Granted: 1973-08-28
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Expires: 1991-06-22
Abstract
Abstract Dual rate gaseous fuel burner assemblies wherein a unitary burner is designed to operate at dual rates for full and standby operation in accordance with the fuel flow supplied from a single supply conduit. A flame sensing element is cooperatively disposed upon the burner assemblies such that both the main and standby flame patterns impinge upon the sensing element to provide an effective safety feedback signal for control of the fuel flow to the burner.
Inventors
- 👤 H Braucksiek
- 👤 J Katchka
- 👤 T Dykzeul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:21
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/72; F23D14/725; F23D14/84
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
187 words
A dual rate gas burner comprising burner housing means defining a closed annular chamber surrounding an open vertical air passage, said burner housing means including a cylindrical housing member and a cylindrical, hollow tube concentrically disposed within said housing member and affixed therein to define said annular chamber therebetween, a single fuel inlet port for said housing means supplying fuel thereto at high and low rates, flame spreading means carried by said housing means, said flame spreading means being disposed in spaced super-position with said housing means for spreading a flame issuing therefrom when a high rate of fuel flow is supplied to said housing means, and outlet means in said housing means defining burner orifice means in the top of said annular chamber for supporting high and low rate flame patterns in accordance with the rate of fuel supplied thereto and for directing both of such flame patterns upwardly of said housing means developing an updraft through said open air passage, said cylindrical housing member having annular shoulder on an upper end thereof and a plurality of upstanding tabs spaced about the periphery of said flange.
Claim 2
Dependent Claim
187 words
A dual rate gas burner comprising burner housing means defining a closed annular chamber surrounding an open vertical air passage, said burner housing means including a cylindrical housing member and a cylindrical, hollow tube concentrically disposed within said housing member and affixed therein to define said annular chamber therebetween, a single fuel inlet port for said housing means supplying fuel thereto at high and low rates, flame spreading means carried by said housing means, said flame spreading means being disposed in spaced super-position with said housing means for spreading a flame issuing therefrom when a high rate of fuel flow is supplied to said housing means, and outlet means in said housing means defining burner orifice means in the top of said annular chamber for supporting high and low rate flame patterns in accordance with the rate of fuel supplied thereto and for directing both of such flame patterns upwardly of said housing means developing an updraft through said open air passage, said cylindrical housing member having annular shoulder on an upper end thereof and a plurality of upstanding tabs spaced about the periphery of said flange.
Claim 3
Dependent Claim
55 words
The invention as recited in claim 1 wherein said cylindrical tube has an outwardly flared, fluted upper end cooperating with said housing member to define a plurality of burner outlet ports comprising said burner orifice means, and wherein the lower end of said tube is sealingly secured to the lower end of said housing member.
Claim 4
Dependent Claim
43 words
The invention as recited in claim 1 wherein said hollow tube has an inverted annular channel contiguously formed on an upper end thereof, and wherein said burner orifice means comprises a plurality of spaced burner outlet ports in the floor of said channel.
Claim 5
Dependent Claim
35 words
The invention as recited in Claim 3 wherein said hollow tube has an annular flange on the periphery of said channel, and wherein said flange is sealingly secured with said shoulder of said housing member.
Claim 6
Dependent Claim
27 words
The invention as recited in claim 1 wherein said flame spreading means comprises a flat plate supported upon a plurality of legs affixed to said housing means.
Claim 7
Dependent Claim
26 words
The invention as recited in claim 5 wherein said flat plate is centrally deformed to define a smooth, radially symmetrical bulge over said burner orifice means.
Claim 8
Dependent Claim
154 words
A multiple rate gas burner and flame sensor combination comprising a multiple rate burner having a single inlet port adapted to be connected with a source of gas, and outlet means establishing a small standby flame directly adjacent said outlet means and the same said outlet means alternately establishing a larger main flame spaced from said outlet means by the velocity of gas issuing therefrom, a flame sensor, and means for locating said flame sensor proximate to said multiple rate burner adjacent said outlet means such that said small standby flame directly impinges upon said flame sensor and said larger main flame projects beyond said flame sensor, said flame sensor being disposed in a position to develop a decreased-velocity turbulence in the gas flow issuing from said outlet means when said larger main flame is established whereby a portion of said main flame propagates back toward said outlet means to surround said flame sensor.
Claim 9
Dependent Claim
154 words
A multiple rate gas burner and flame sensor combination comprising a multiple rate burner having a single inlet port adapted to be connected with a source of gas, and outlet means establishing a small standby flame directly adjacent said outlet means and the same said outlet means alternately establishing a larger main flame spaced from said outlet means by the velocity of gas issuing therefrom, a flame sensor, and means for locating said flame sensor proximate to said multiple rate burner adjacent said outlet means such that said small standby flame directly impinges upon said flame sensor and said larger main flame projects beyond said flame sensor, said flame sensor being disposed in a position to develop a decreased-velocity turbulence in the gas flow issuing from said outlet means when said larger main flame is established whereby a portion of said main flame propagates back toward said outlet means to surround said flame sensor.
Claim 10
Dependent Claim
47 words
The invention as recited in claim 7 wherein said multiple rate burner includes housing means defining a closed annular chamber surrounding an open vertical air passage and an inlet conduit connected with said housing means at said single inlet port and extending radially from said annular chamber.
Claim 11
Dependent Claim
31 words
The invention as recited in claim 8 wherein said locating means includes attaching means carried upon said inlet conduit, and wherein said flame sensor is obliquely supported upon said attaching means.
Claim 12
Dependent Claim
29 words
The invention as recited in claim 7 including flame spreading means mounted in superposition with said multiple rate burner for spreading the larger main flame from said outlet means.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |