US2575101A - Dual band gas burner with crossover burner grid - Google Patents
Dual band gas burner with crossover burner grid Download PDFInfo
- Publication number
- US2575101A US2575101A US9524A US952448A US2575101A US 2575101 A US2575101 A US 2575101A US 9524 A US9524 A US 9524A US 952448 A US952448 A US 952448A US 2575101 A US2575101 A US 2575101A
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- United States
- Prior art keywords
- arcuate
- burner
- elements
- casting
- rib
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
- F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
- F23D14/586—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits formed by a set of sheets, strips, ribbons or the like
Definitions
- the casting 16 includes a main hollow cylindrical portion 22, closed at opposite ends by walls 23 and 24.
- the wall 23 is provided with the tapped aperture I1 while the opposite wall 24 has .
- a tapped hole 25 closable by a matchingly threaded plug not shown.
- a pair of like horizontal ribs 26 are a pair of like horizontal ribs 26, these extended from close to one end of said casting, to a short distance from the other end thereof.
- ribs 26 Through said ribs, and extending almost from end to end thereof, are cut slots 21, within which are band or ribbon assemblies pursuant to the patents aforesaid.
- These assemblies are made of corrosion-proof and non-oxydizing metal ribbons.
- Such'assemblies are secured in thefslots 21 in any desired way; for instance, by lines of rivets as indicated at 29.
- a burner assembly 31 for providing burner-orifices for the connecting cross-over.
- the burner assembly 31 is of arcuate formation, and is here shown as comprising two outer plane band or ribbon elements 38 and 39 and two inner corrugated band or ribbon elements 40 and 4
- are semi-annular and have their corrugations, as illustrated, extended along lines radial to such annulus. These elements are sandwiched in between the elements 38 and 39, which latter are also semi-annular. The bottom curvilinear edges of all said elements are aligned, to partially nest the crest portions of the corrugations of one of the elements 40 and 4
- the plane elements 38 and 39 while semi-annular like the elements 40 and 4
- Any suitable means may be employed to establish the assembly 31 by coupling the elements 38 4I to clamp the elements 40 and 4
- may be provided with matching apertures 45 as shown in-Fig. 3, for connecting said elements 38- -4I as in Fig. 4 by applying rivets through said apertures, such rivets countersunk in the outer ends ofthe apertures through the. elements 39 and 39 so as to have the rivet ends flush with the outer surfaces of said elements 38 and 39.
- the width of the slot 36 is such that when the assembly 31 is forced down all the way into said slot, the upper portions of the outer elements 38 and 39 will close in to establish the required intimacy of contact between said elements 38 and 39 and the inner elements and 4
- silver solder may be used as just described, and the apertures may also be present, with the latter used, in connection with matching apertures through the rib halves 35, for anchoring the assembly 31 in place in the slot 36, by readily removable L-shaped pins applied at the apertures through said assembly and said rib halves.
- a now preferred way of mounting the assembly 31 in the slot 36 is to shape one of the two outer plane elements 39 and 39 so that the same includes tabs 41 to be bent over for projection perpendicularly from one side of the assembly 31, so that such tabs at their underlying faces will engage the top of a half rib 35 when the assembly 31 is properly positioned in the slot 36.
- both of the elements 38 and 39 are provided with tabs 41. Whether one or both of the elements 38 and 39 carry said tabs.
- At least one of said elements will preferably be provided with at least two of the tabs, these located at suitably spaced points in the direction of curvilinear extension of the assembly 31 to insure that when both the last mentioned tabs engage the adjacent rib half 35 the assembly will be properly centered in the slot 36.
- Adjacent a pad 48 at the top and near one end of the casting H5 is an electrical ignition means including a sparking electrode 49 projected from a casing 59 of insulating material, such casing held ina mounting clip 5
- the burner may be ignited from any desired point along the entirety of the H-shaped array of burner orifices.
- the point of ignition is along one of the main flame spaces at a slot 21, the flame instantly travels all along such space, and, instantly also flashes along the cross-over line of burner-orifices at the device 31, and then instantly all along the other main flame space at the other slot 21.
- the ribs 35 forming the cross-over is shown at substantially the center of the burner and extended at right angles thereto; however, it is pointed out that the ribs may be formed at any point intermediate the length of the burner and at any desired angle.
- the intermediate ribbons of the ribbon assemblies 28 and 31 are illustrated as being corrugated, this is by way of illustration, as they may take any desired shape which provides spaces between the adjacent faces.
- a gas burner comprising aho'llow feasting for connection to a source of combustible gas and formed along diametrically opposite sides with parallel ribs having elongated slots, burner-as: sembliesinsaid slots for discharging the combustible gas from the casting in a burnable sprayga burner assembly for, igniting the gas discharging, from one side when the, gas discharging from the other side has been ignited said burner assembly comprising an-arcuate rib formed across thfiltOp orthecasting and extended between the tops ofs'the'parallel ribs, saidadrchate :rib bein divided into a pair of adjacent rib portions by an intermediate slot, said slot communicating with the interior of the casting and with the slots of the parallel ribs, and an arcuate burner assembly mounted in position between the adjacent faces of said adjacent rib portions to have the combustible gas discharge therefrom in a burnable spray to be ignited by the burning gas along the said
- a gas burner comprising a hollow casting for connection to a source of combustible gas and formed along diametrically opposite sides with parallel ribs having elongated slots, burner assemblies mounted in said slots for discharging the combustible gas from the casting in a burnable spray, a cross-over for igniting the gas discharging from one side when the gas discharging from the other side has been ignited, said crossover comprising an arcuate rib formed across the top of the casting and extended between the tops of the parallel ribs, said arcuate rib being divided into a pair of adjacent rib portions by an intermediate slot, said slot communicating with the interior of the casting and with the slots of the parallel ribs, and an arcuate burner assembly mounted in position between the adjacent faces of said adjacent rib portions to have the combustible gas discharge therefrom in a burnable spray to be ignited by the burning gas along the said other side of the casting to carry the flame to the said one side thereof and ignite the combustible gas discharging from that said
- said crossover comprising an arcuate rib formed across the top of the casting and extended between the tops of the parallel ribs, said arcuate rib being divided into a pair of adjacent rib portions by an intermediate slot, said slot communicating with the interior of the casting and with the slots of the parallel ribs, and an arcuate burner assembly mounted in position between the adjacent faces of said adjacent rib portions to have the combustible gas discharge therefrom in a burnable spray to be ignited by the burning gas along the said other side of the casting to carry the flame to the said one side thereof and ignite the combustible gas discharging from that said one side, said arcuate burner assembly comprising a pair of adjacent inner corrugated arcuate ribbon elements, a flat outer arcuate ribbon element located on either side of said inner ribbon elements and concentric therewith, means securme said ribbon elements together as a unit to be slipped into position in the slot between said arcuate rib
- a gas burner comprising a hollow casting for connection to a source of combustible gas and formed along diametrically opposite sides with parallel ribs having elongated slots, burner assemblies mounted in said slots for discharging the combustible gas from the casting in a burnable spray, a cross-over for igniting the gas discharging from one side when the gas discharging from the other side has been ignited, said crossover comprising an arcuate rib formed across the top of the casting and extended between the tops'of the parallel ribs, said arcuate rib being divided into a pair of adjacent rib portions by an intermediate slot, said slot communicating with the interior of the casting and with the slots of the parallel ribs, and an arcuate burner assembly mounted in position between the adjacent faces of said adjacent rib portions to have the combustible gas discharge therefrom in a burnable spray to be ignited by the burning gas along the said other side of the casting to carry the flame to the said one side thereof and ignite the combustible gas discharging from that
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
Nov. 13, 1951 w. B. ENSIGN ETAL 2,575,101
DUAL BAND GAS BURNER WITH CROSSOVER BURNER GRID Filed- Feb. 19, 1948 IN V EN TOR! WLLIAM B. ENSIGN O'r'ro WILDERMAN.
able pipe for supplying a combustion mixture of gas and air.
The casting 16 includes a main hollow cylindrical portion 22, closed at opposite ends by walls 23 and 24. The wall 23 is provided with the tapped aperture I1 while the opposite wall 24 has .a tapped hole 25 closable by a matchingly threaded plug not shown.
Exteriorly offset from and extended along oppo site sides of portion 22 of the casting I9 are a pair of like horizontal ribs 26, these extended from close to one end of said casting, to a short distance from the other end thereof. Through said ribs, and extending almost from end to end thereof, are cut slots 21, within which are band or ribbon assemblies pursuant to the patents aforesaid. These assemblies, one of which is seen at 28 in Fig. 2, are made of corrosion-proof and non-oxydizing metal ribbons. Such'assemblies are secured in thefslots 21 in any desired way; for instance, by lines of rivets as indicated at 29.
Extending laterally across the top of the casting 6, at a point intermediate its ends, is an external arcuate rib which at its opposite bottom portions joins the upper portions of the side ribs 26. This arcuate rib is divided into two like rib halves 35 by a slot 36; which slot, as shown best in Fig. 2 connects with the two side slots 21.
. All the foregoing is illustrative of the subject matter of applicants said patent application filed herewith.
Referring to the invention disclosed and claimed herein, between the two rib halves 35 is mounted a burner assembly 31 pursuant to the present invention, for providing burner-orifices for the connecting cross-over.
The burner assembly 31 is of arcuate formation, and is here shown as comprising two outer plane band or ribbon elements 38 and 39 and two inner corrugated band or ribbon elements 40 and 4|.
In such assembly the plane elements 38 and 39, while semi-annular like the elements 40 and 4| as just stated, are of greater width than the elements 49 and 4|, so that when these parts are arranged as just above described, an arcuately extending compartment or channel 44, to provide a gas expansion and distribution space, is established in ofiset relation from the outer ends of said orifices between the elements 4|] and 4|.
Any suitable means may be employed to establish the assembly 31 by coupling the elements 38 4I to clamp the elements 40 and 4| between the elements 38 and 39; such clamping coupling being preferably done before the device 31 is mounted in the slot 36.
For instance, the four elements 38-4| may be provided with matching apertures 45 as shown in-Fig. 3, for connecting said elements 38- -4I as in Fig. 4 by applying rivets through said apertures, such rivets countersunk in the outer ends ofthe apertures through the. elements 39 and 39 so as to have the rivet ends flush with the outer surfaces of said elements 38 and 39.
Another way of establishing the device 31 is, with the parts tightly squeezed together as in Fig. 4, to apply silver solder at both lower ends of all the elements, as at the areas marked 46 in Fig. 3.
The width of the slot 36 is such that when the assembly 31 is forced down all the way into said slot, the upper portions of the outer elements 38 and 39 will close in to establish the required intimacy of contact between said elements 38 and 39 and the inner elements and 4| and between the corrugations of the latter.
Also, silver solder may be used as just described, and the apertures may also be present, with the latter used, in connection with matching apertures through the rib halves 35, for anchoring the assembly 31 in place in the slot 36, by readily removable L-shaped pins applied at the apertures through said assembly and said rib halves.
A now preferred way of mounting the assembly 31 in the slot 36,- however, is to shape one of the two outer plane elements 39 and 39 so that the same includes tabs 41 to be bent over for projection perpendicularly from one side of the assembly 31, so that such tabs at their underlying faces will engage the top of a half rib 35 when the assembly 31 is properly positioned in the slot 36. As here shown, both of the elements 38 and 39 are provided with tabs 41. Whether one or both of the elements 38 and 39 carry said tabs. at least one of said elements will preferably be provided with at least two of the tabs, these located at suitably spaced points in the direction of curvilinear extension of the assembly 31 to insure that when both the last mentioned tabs engage the adjacent rib half 35 the assembly will be properly centered in the slot 36.
Adjacent a pad 48 at the top and near one end of the casting H5 is an electrical ignition means including a sparking electrode 49 projected from a casing 59 of insulating material, such casing held ina mounting clip 5| suitably attached, as by a screw 52, to the main cylindrical portion 22 of the casting.
The burner may be ignited from any desired point along the entirety of the H-shaped array of burner orifices. When, as is preferred, the point of ignition is along one of the main flame spaces at a slot 21, the flame instantly travels all along such space, and, instantly also flashes along the cross-over line of burner-orifices at the device 31, and then instantly all along the other main flame space at the other slot 21.
The ribs 35 forming the cross-over is shown at substantially the center of the burner and extended at right angles thereto; however, it is pointed out that the ribs may be formed at any point intermediate the length of the burner and at any desired angle. Furthermore, while the intermediate ribbons of the ribbon assemblies 28 and 31 are illustrated as being corrugated, this is by way of illustration, as they may take any desired shape which provides spaces between the adjacent faces.
While we have illustrated and described the preferred embodiment of our invention, it is to be understood that 'we do not limit ourselves to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.
Having thus described our invention, what we claim as newpand desiretosecure by United states Letters Patent 18: i i. l
l. A gas burner comprising aho'llow feasting for connection to a source of combustible gas and formed along diametrically opposite sides with parallel ribs having elongated slots, burner-as: sembliesinsaid slots for discharging the combustible gas from the casting in a burnable sprayga burner assembly for, igniting the gas discharging, from one side when the, gas discharging from the other side has been ignited said burner assembly comprising an-arcuate rib formed across thfiltOp orthecasting and extended between the tops ofs'the'parallel ribs, saidadrchate :rib bein divided into a pair of adjacent rib portions by an intermediate slot, said slot communicating with the interior of the casting and with the slots of the parallel ribs, and an arcuate burner assembly mounted in position between the adjacent faces of said adjacent rib portions to have the combustible gas discharge therefrom in a burnable spray to be ignited by the burning gas along the said other side of the casting to carry the flame to the said one side thereof and ignite the combustible gas discharging from that said one side, said arcuate burner assembly comprising a pair of adjacent inner corrugated arcuate ribbon elements, a flat outer arcuate ribbon element located on either side of said inner ribbon elements and concentric therewith, means securing said ribbon elements together as a unit to be slipped into position in the slot between said arcuate rib portions, and tabs integrally formed on the outer peripheries of said outer arcuate ribbon elements adjacent their ends, said tabs being bent to extend outward at right angles to said outer arcuate ribbon elements to engage the outer peripheries of said arcuate rib portions securing said arcuate burner assembly against lateral shifting relative to said arcuate rib.
2. A gas burner comprising a hollow casting for connection to a source of combustible gas and formed along diametrically opposite sides with parallel ribs having elongated slots, burner assemblies mounted in said slots for discharging the combustible gas from the casting in a burnable spray, a cross-over for igniting the gas discharging from one side when the gas discharging from the other side has been ignited, said crossover comprising an arcuate rib formed across the top of the casting and extended between the tops of the parallel ribs, said arcuate rib being divided into a pair of adjacent rib portions by an intermediate slot, said slot communicating with the interior of the casting and with the slots of the parallel ribs, and an arcuate burner assembly mounted in position between the adjacent faces of said adjacent rib portions to have the combustible gas discharge therefrom in a burnable spray to be ignited by the burning gas along the said other side of the casting to carry the flame to the said one side thereof and ignite the combustible gas discharging from that said one side, said arcuate burner asembly comprising a pair of adjacent inner corrugated arcuate ribbon elements, a flat outer arcuate ribbon element located on either side of said inner ribbon elements and concentric therewith, means securing said ribbon elements together as a unit to be slipped into position in the slot between said arcuate rib portions, and tabs integrally formed on the outer peripheries of said outer arcuate ribbon elements adjacent their ends, said tabs being bent to extend outward at right angles to said outer arcuate ribbon elements to engage the outer peripheries of saidirarcilate ribirport-ionsssecur ng:isaia@arcuats burneriassemblmaeainst lateralshiitf .a relative is d. arcuatenb said s curingmeans iorrsaid 'ribbonz lements comprising; spotweldsepplied;to paced .n intsonsaid ribbon, elements.
.1 3.145 :aas ,gbnrnerzcomprisine. Laghollow casting ior;; c,enne tion :to :a source of combustiblezzeas and formed :along diametrically opPositesidsfi with-p r llel ribs having elongated .slots..;burner assembliesmounted in saidslots fordischarging thegcombustible gas; fromthercasting .in ma burnable spray, a crosseover for :ignitingthe gasz-discharginafrom. oneside when the gas discharging fromntheaothenside:has :;been ignited, said crossover comprising an arcuate rib formed across the top of the casting and extended between the tops of the parallel ribs, said arcuate rib being divided into a pair of adjacent rib portions by an intermediate slot, said slot communicating with the interior of the casting and with the slots of the parallel ribs, and an arcuate burner assembly mounted in position between the adjacent faces of said adjacent rib portions to have the combustible gas discharge therefrom in a burnable spray to be ignited by the burning gas along the said other side of the casting to carry the flame to the said one side thereof and ignite the combustible gas discharging from that said one side, said arcuate burner assembly comprising a pair of adjacent inner corrugated arcuate ribbon elements, a flat outer arcuate ribbon element located on either side of said inner ribbon elements and concentric therewith, means securme said ribbon elements together as a unit to be slipped into position in the slot between said arcuate rib portions, and tabs integrally formed on the outer peripheries of said outer arcuate ribbon elements adjacent their ends, said tabs being bent to extend outward at right angles to said outer arcuate ribbon elements to engage the outer peripheries of said arcuate rib portions securing said arcuate burner assembly against lateral shifting relative to said arcuate rib, said arcuate burner assembly being of a length to have its ends rest directly on the burner assemblies of the parallel ribs providing a continuity of discharge ports.
4. A gas burner comprising a hollow casting for connection to a source of combustible gas and formed along diametrically opposite sides with parallel ribs having elongated slots, burner assemblies mounted in said slots for discharging the combustible gas from the casting in a burnable spray, a cross-over for igniting the gas discharging from one side when the gas discharging from the other side has been ignited, said crossover comprising an arcuate rib formed across the top of the casting and extended between the tops'of the parallel ribs, said arcuate rib being divided into a pair of adjacent rib portions by an intermediate slot, said slot communicating with the interior of the casting and with the slots of the parallel ribs, and an arcuate burner assembly mounted in position between the adjacent faces of said adjacent rib portions to have the combustible gas discharge therefrom in a burnable spray to be ignited by the burning gas along the said other side of the casting to carry the flame to the said one side thereof and ignite the combustible gas discharging from that said one side, said arcuate burnerassembly comprising a pair of adjacent inner corrugated arcuate ribbon elements, a flat outer arcuate ribbon element located on either side of said inner ribbon elements and concentric therewith, means secur- 1: ing said ribbon elements together as '8- unit I'D I 4 REFERENCES CITED be Shpped mto posltlon in the slot between said The following references are of record in the arcuate rib portions, and tabs integrally formed me patent. on the outer peripheries of said outer arcuate ribbon elements adjacent their ends, said tabs 5 UNITED STATES PAIENIS being bent to extend outward at right angles to Number Name Date said outer arcuate ribbon elements to engage 832,879 Roy Oct. 9, 1906 theouter peripheries of said arcuate rib por- 1,571,636 Nieberding Feb. 2, 1926 tions securing said arcuate burner assembly 2,210,069 Ensign Aug. 6, 1940 against lateral shifting relative to said arcuate 10 2,235,635 Herman Mar. 18, 1944 rib, said tabs being secured to the outer periph- 2.3481011 Koppel May 2, 1944 eries of said 'arcuate rib portions. 2,42852'71 Ensign et a1. Sept. 30, 1947 -WILLIAM B. ENSIGN. 2,4433101 Flynn June 8, 1948 OTTO WILDERM'ANN. 2,491.;430 Tullis Dec. 13, 1949
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9524A US2575101A (en) | 1948-02-19 | 1948-02-19 | Dual band gas burner with crossover burner grid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9524A US2575101A (en) | 1948-02-19 | 1948-02-19 | Dual band gas burner with crossover burner grid |
Publications (1)
Publication Number | Publication Date |
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US2575101A true US2575101A (en) | 1951-11-13 |
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Application Number | Title | Priority Date | Filing Date |
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US9524A Expired - Lifetime US2575101A (en) | 1948-02-19 | 1948-02-19 | Dual band gas burner with crossover burner grid |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2747658A (en) * | 1954-09-14 | 1956-05-29 | Ensign Ribbon Burners Inc | Dual band type gas burner with cross-over flame connection |
US2801686A (en) * | 1957-08-06 | H flynn | ||
US3047056A (en) * | 1959-11-12 | 1962-07-31 | John H Flynn | Ribbon assembly for gas burners |
DE1247531B (en) * | 1962-08-24 | 1967-08-17 | John Harold Flynn | Tube burner for gaseous fuels |
FR2063803A5 (en) * | 1969-10-31 | 1971-07-09 | Gaz De France |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US832879A (en) * | 1905-11-20 | 1906-10-09 | American Stove Co | Heating-burner. |
US1571636A (en) * | 1921-08-08 | 1926-02-02 | Margaret H Nieberding | Heater |
US2210069A (en) * | 1938-09-20 | 1940-08-06 | William B Ensign | Ribbon burner |
US2235635A (en) * | 1939-07-24 | 1941-03-18 | Detroit Michigan Stove Company | Burner structure |
US2348011A (en) * | 1940-05-18 | 1944-05-02 | Smith Corp A O | Sheet metal gas burner |
US2428271A (en) * | 1943-10-28 | 1947-09-30 | Ensign Ribbon Burners Inc | Ribbon burner |
US2443101A (en) * | 1944-11-15 | 1948-06-08 | Ensign Ribbon Burners Inc | Ribbon burner |
US2491430A (en) * | 1946-07-31 | 1949-12-13 | Coleman Co | Utility stove and burner assembly therefor |
-
1948
- 1948-02-19 US US9524A patent/US2575101A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US832879A (en) * | 1905-11-20 | 1906-10-09 | American Stove Co | Heating-burner. |
US1571636A (en) * | 1921-08-08 | 1926-02-02 | Margaret H Nieberding | Heater |
US2210069A (en) * | 1938-09-20 | 1940-08-06 | William B Ensign | Ribbon burner |
US2235635A (en) * | 1939-07-24 | 1941-03-18 | Detroit Michigan Stove Company | Burner structure |
US2348011A (en) * | 1940-05-18 | 1944-05-02 | Smith Corp A O | Sheet metal gas burner |
US2428271A (en) * | 1943-10-28 | 1947-09-30 | Ensign Ribbon Burners Inc | Ribbon burner |
US2443101A (en) * | 1944-11-15 | 1948-06-08 | Ensign Ribbon Burners Inc | Ribbon burner |
US2491430A (en) * | 1946-07-31 | 1949-12-13 | Coleman Co | Utility stove and burner assembly therefor |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2801686A (en) * | 1957-08-06 | H flynn | ||
US2747658A (en) * | 1954-09-14 | 1956-05-29 | Ensign Ribbon Burners Inc | Dual band type gas burner with cross-over flame connection |
US3047056A (en) * | 1959-11-12 | 1962-07-31 | John H Flynn | Ribbon assembly for gas burners |
DE1247531B (en) * | 1962-08-24 | 1967-08-17 | John Harold Flynn | Tube burner for gaseous fuels |
FR2063803A5 (en) * | 1969-10-31 | 1971-07-09 | Gaz De France |
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