US2409129A - Gas burner - Google Patents

Description

o@ s, 1946. l

H.LANGE GAS BURNER Filed Sept. 16, 1943 2 Sheets-Sheet l 0cm s, 1946.

H. LANGE GAS BURNER Filed Sept. 16, 1943 2 Sheets-Sheet 2 Patented Oct. 8, 1946 GAS BURNER Henry Lange, Quincy, Ill., assignor to The Quincy Stove Manufacturing Company, Quincy, Ill., a corporation of Illinois Application September 16, 1943, Serial No. 502,583

7 Claims.

This invention relates to improvements in gas burners.

In domestic cooking ranges of the combination type, such as are designed for burning coal or wood as well as gas, it has been common practice to locate the gas burners within the bottom flues of the ovens, which, during use of a solid fuel in the rebox, receives hot combustion products from the i'lrebox for applying heat to the bottoms of the ovens. Such gas burners have produced cool spots of substantial areas on the oven bottoms, and notwithstanding the use of heat conducting closure plates or lids in the openings above the gas burners, they have impaired the uniformity of the bottom heat supplied by the bottom flues when the ovens were heated from the re box.

One object of the present invention is to provide a novel gas burner for the oven of a combination range which occupies less area in the oven bottom than the prior types of burners of equal heating capacity, and thereby .permits a better distribution of bottom ilue heat whenever the oven is heated by a solid fuel.

Another object of the invention is to provide an improved gas burner having a novel arrangement of gas ports which insure that each flame will receive an adequate supply of secondary air and thereby prevent floating flames and incomplete combustion of the gas.

An additional object of the invention is to provide a gas burner generally of tubular form having a tubular combustion chamber within which the flames are conned and supplied with secondary air for eicient combustion.

Another object of the invention is to provide a gas burner having an internal combustion chamber forming member which can be removed ent improvements;

Fig. 2 is a broken enlarged sectional elevation taken on line 2--2 of Fig, 1;

Fig. 3 is a top plan view of the improved burner;

Fig. 4 is a sectional view taken on line 4-4 of rig. s;

Fig. 5 is a sectional view taken on line 5-5 of Fig. 3.

In Fig. 1 of the drawings, I0 indicates a combination range generally, the particular details of which are not pertinent to the present improvements. The oven is shown as being provided with a conventional rebox Il for receiving solid fuel,

' the hot combustion gases from which are caused to circulate about the exterior of the oven for heating the same. For example, a top flue I2 is shown which communicates with the rebox and through which combustion gases flow into a vertical iiue I3 which communicates with a bottom flue I4 deiined by the bottom I5 of the oven and the bottom wall I6 of the range. The hot combustion gases flowing into and through the bottom iiue Hi supply heat to the bottom of the oven and may ow thence to a back flue (not shown) whence they exhaust through an exhaust i'iue il'.

For the lpurpose of heating the oven with gas when it is not desirable to utilize a solid fuel in the rebox II, a gas burner is positioned in the bottom flue I4 preferably centrally of the oven bottom. The gas burner is indicated generally by the numeral I8, and, as shown more in detail in Figs. 2 to 5 inclusive, it comprises an outer tubular shell i9, which may be of cast iron, for example, which is supported on the range bottom IS and extends upwardly into contact with the oven bottom I5. The shell I9 is shown provided with a stepped or flanged bottom portion providing annular flanges and 2| through the former of which, as shown in Fig. 4, bolts 22 may be passed for securing the shell I9 in firm Contact with the range bottom I6. The range bottom is shown provided with an annular rib 23, which contacts the lower portion of the shell to assist in affording a gas-tight connection. The bottom surface of the flange 2| is also shown contacting the bottom I6 with intermediate sealing or gasket forming material 24 therebetween.

The construction described provides adequate contact between the lower end of the shell I9 and the bottom I6 to provide a gas-tight connection therebetween, whereby combustion gases flowing within the ue cannot pass beneath the lower end of the shell. The upper end of the shell I9 is also provided with horizontal steps or flanges 25 and 26, the former of which terminates in an upwardly directed rib 21 which contacts the lower surface of the oven bottom I5, while the flange 26 provides a seat for an inner tubular burner member hereinafter described.

The bottom wall I6 is provided with an opening 28 concentric with the burner, and the oven bottom I5 is likewise provided with an opening 29 concentric with the burner whereby secondary air from beneath the range can ilow upwardly through the central combustion chamber of the burner structure as mentioned hereinafter. The marginal portion of the oven bottom I5 adjacent the opening 29 is shown with a depending flange 30 which seats upon the flange 25 for the purpose of affording a tight seal between the bottom I5 and the upper end of the member I9 to prevent escape of combustion gases from the flue I4.

The ilange 25 is shown enlarged at opposite portions to form ears 3l for accommodating latches 32 which may be moved to inoperative position as described hereinafter whenever it is desired to clean the burner. The depending flange 35.1 is shown cut away adjacent the ears 3I to accommodate swinging movement of the latches 32 as shown in Fig. 4. The inner tubular member previously referred to is indicated by the numeral 33 and is adapted to seat at its lower end upon the flange 2| while its upper end is provided with an outwardly directed flange 34 which is adapted to rest upon the flange 2S and to make gas-tight Contact with the flanges 2l and 23.

The inner tubular member 33 is of less diameter than member I9 and said members cooperate to form therebetween an annular gas distributing passage35. Gas is supplied to the burner through a duct 36 which, at its outer end, is provided with a conventional mixing valve 31 as shown in Fig. 2. Primary air and gas flow through the duct 35 into the distributing passage 35 and thence through a plurality of gas ports 33 provided in the inner shell or tubular member 33. The ports 38 are shown arranged in inclined rows to provide a staggered arrangement of the individual ports to insure to each jet of gas a supply of secondary air flowing upwardly through the opening 23.

As illustrated in the drawings, the tubular members I9 and 33 flare outwardly slightly in an upward direction and such shape of the inner member 33 reduces the likelihood of the individual flames contacting the inner surface of the member 33 and being cooled and causing a deposit of carbon on the wall. The jets of gas issuing through the ports 38 are, by the construction disclosed, supplied with adequate quantities of secondary air whereby the flames are stable and floating llames resulting from incomplete combustion of the gas are avoided. The unimpeded flow of secondary air into the combustion chamber afforded by the described construction of the burner provides an adequate supply of air to the individual flames, and hence a relatively large number of gas ports 38 may be provided so that the improved burner obstructs a smaller portion of the oven bottom I5 than a conventional burner of equal heating capacity. When the oven is being heated by hot combustion gases within the flue I4, the improved gas burner interferes less with the uniform heating of the oven bottom by the combustion gases than does a conventional burner of equal heating capacity.

It will be seen that when the oven is being heated by combustion gases flowing within the flue Iii, the gases can circulate freely about the gas burner, and by providing a closely fitting lid 39 within the opening 29 substantial heat conduction by the lid materially reduces the cooling effect produced by the gas burner.

When the gas burner is in use, a baille plate 1343 which is positioned in the lower part of the oven serves to distribute the heat from the burner so that the oven temperature is uniform. Since the flames at each of the ports 33 are conned within the combustion chamber and generally do not extend upwardly into the oven, the baille 40 may be placed at a lower elevation within the oven than where a conventional burner is employed. Lowering the level of the baille increases the effective pan-holding capacity of the oven. The baille 4i) is shown supported at its side edges by lugs 4I.

-When it becomes desirable to clean the burner, the latches 32 may be swung to non-latching position with reference to the inner shell 33 and the latter lifted out, and cleaned readily and replaced without difllculty.

The improved burner not only can be cleaned readily by removal of the inner tubular member or sleeve 33, but improved combustion of the gas is effected by the unobstructed flow of secondary air to all sides of the individual port flames which is facilitated by the flaring shape of the inner tubular member 33 and by the circumferential and vertical staggering of each gas port with respect to adjacent ports.

While I have shown and described in detail the present preferred construction of the burner in adapting the same for use in a domestic range, it will be apparent that various changes in described details may be made within the spirit of the invention.

I claim:

1. In combination with spaced horizontal walls of an oven gas flue provided with vertically aligned openings therein a gas burner positioned between said horizontal Walls, said burner comprising an outer tubular member extending between said walls and provided with means at the upper and lower ends thereof providing gas-tight seals with said walls at the margins of said openings, an inner tubular member positioned within said outer member, said inner member defining therein a central combustion chamber substantially equal in length to the distance between said walls and being open at the upper and lower ends for permitting flow of air upwardly through the chamber, said tubular members having upper and lower contacting portions providing gas seals therebetween and being spaced apart intermediate said contacting portions to provide an annular gas distributing passage therebetween, and a plurality of gas ports in said inner member for jetting gas from said passage into the stream of air in said chamber for combustion therein.

2. In combination with spaced horizontal walls of an oven gas flue provided with vertically aligned openings therein, of a gas burner positioned between said horizontal walls, said burner comprising an outer tubular member extending between said walls and provided with means at the upper and lower ends thereof providing gas-tight seals with said walls at the margins of said openings, an inner tubular member positioned within said outer member, said inner member defining therein a central combustion chamber substantially equal in length to the distance between said walls and being open at the upper and lower ends for permitting flow of air upwardly through the chamber, said tubular members having upper and lower contacting portions providing gas seals therebetween and being spaced apart intermediate said contacting portions to provide an annular gas distributing passage therebetween and a plurality of gas ports in said inner member for jetting gas from said passage into the stream of air in said chamber for combustion therein, said gas ports being arranged in inclined rows spaced circumferentially of said inner member distances greater than the distance between adjacent ports within a row whereby each port of any row is spaced from any directly subjacent port in an adjacent row a distance greater than the distance between the respective rows.

3. ln combination, a pair of vertically spaced oven walls defining therebetween a circulation line for het gases, said walls having a pair of aligned openings therein, a tubular member positioned in said openings and sealed to the flue walls at the margins of the openings to prevent escape of iue gases through said openings, an inner tubular member positioned in said first mentioned tubular member and annularly spaced therefrom to provide an intermediate gas distributing passage, means at the upper and lower ends of said members for sealing the respective ends of said passage, means for conveying gas to said passage, and a plurality of gas ports in said inner tubular member distributed over the portion intermediate the ends thereof for directing gas from said passage into the interior of said inner tubular member for combustion there- 4. A gas burner adapted to be positioned in a pair of vertically aligned openings in the horizontal walls of an oven heating flue comprising a pair of coaXially arranged separable tubular members having upper and lower contacting portions providing gas seals therebetween and defining an intermediate annular gas distributing pas- 2 sage between said members, releasable vmeans for latching said tubular members in gas sealing relation, means for supplying gas to said passage, and a plurality of cireumferentially spaced oblique rows of gas ports in the inner of said members for letting gas from said passage into the interior of said inner member for combustion within the latter.

5. In combination, an oven provided with spaced bottom walls dening therebetween a bottom heating iiue and having registering openings therein, a tubular member spanning said ue in alignment with said openings and united to said walls at the margins of said openings to prevent leakage of gases from said flue around said tubular member, a gas supply duct communicating with said tubular member, an inner tubular member -dening an inner combustion chamber and coaXially positioned Within said iirst tubular member and coacting therewith to provide an annular gas distributing passage therebetween closed at the upper and lower ends of said inner tubular member, and a plurality of gas ports in said inner tubular member arranged in circumferentially off-set oblique rows in communication with said gas distributing passage for jetting gas into said combustion chamber for combustion therein.

6. A gas burner comprising an outer tubular member, an inner tubular member intermediately spaced apart and providing seals adjacent the upper and lower ends to form an annular gas distributing passage therebetween, means for conducting gas to said passage, and a plurality of burner ports in said inner tubular member communicating with said passage and arranged in circumferentially off-set inclined rows for jetting gas into the interior of said inner tubular member for combustion therein and whereby secondary air passing upwardly through said inner tubular member can flow to each jet Without'obstruction by a subjacent jet.

7. A gas burner comprising an outer tubular shell open at the ends, an inner tubular member Within said shell open at the ends to enable the free flow of secondary air axially through the saine, means sealing the ends of said inner tubular member to said shell and spacing the same apart annularly intermediate said sealing means to provide therebetween an annular gas passage, means for conducting gas into said passage, and a plurality of oblique rows of gas ports in said tubular member through which gas is jetted into the interior of said tubular member for combustion within the secondary air stream flowing through said member, said rows of openings being spaced apart circumferentially distances greater than the spaces between ports within a row to insure access of the flame at said ports to fresh secondary air flowing through said tubular member.

HENRY LANGE.

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