US2541710A - Sheet metal multiple gas burner - Google Patents

Description

Feb. 13, 1951 J. w. MILLER SHEET METAL MULTIPLE GAS BURNER 2 Sheets-Sheet 1 Filed Sept. 21, 1948 A TTdi/VE Y5 Feb. 13, 1951 J. w. MILLER 2,541,710

SHEET METAL MULTIPLE GAS BURNER Filed Sept. 21, 1948 2 SheetsSheet 2 IN V EN TOR.

c/a/m W. MU/er ATTQRNEYJ UNITED STATES PATENT OFFICE SHEET METAL MULTIPLE GAS BURNER John W. Miller, Lansing, Mich., assignor to Motor Wheel Corporation, Lansing, Mich., a corporation of Michigan Application September 21, 1948, Serial No. 50,261

8 Claims.

This invention relates to a gas burner and more particularly to a gas burner made from one or more strips of sheet metal.

It is old in the art to fabricate a gas burner of parallel transversely extendingflutes Ill. Each flute I is in the form of a semi-cylinder so that when sections 1 and 8 are juxtaposed in complementary relation the flutes cooperate to form gas from two strips of steel which are stamped or outlet ports H. Fluted edges 9 of sections 1 rolled to shape to form complementary right and and 8 contact as at i2 between the flutes and left hand members which are positioned one are preferably spot Welded together at these conupon the other and then welded together along tacting portions 52. Sections 1 and 8 can be a portion of their periphery and provided with joined together in any suitable manner but prefa line of ports along one of the edges. When this erably are welded together along their lower edge type of burner is made in the form of a relaportions 13 and the outer end portion is. tively long thin unit and the gas is supplied Each jet tube 2, 3 and 4 is of the Bunsen type through a jet tube at one end of the unit, a seriand provided with a plurality of air inlets l5 ous problem arises in respect to uniformly disin the body of the jet tube. Burner body 1 is tributing the gas to all of the burner ports. One provided with two air inlets it for each of the of the defects of this type of burner has been that jet tubes adjacent the outlet ends l'i. the gas will not be uniformly distributed to all Each burner section I and 8 is provided with of the ports throughout the length of the burner, three longitudinally extending parallel corrugawhich has caused some of the ports to burn with tions or flutes l8, l9 and 25 which, when sections a higher flame than others, 7 and 8 are secured together in juxtaposed com- This invention contemplates a gas burner made plementary relation, provide sockets into which of strip metal in a relatively long narrow unit the jet tubes 2, 3 and 6 respectively are received in which the combustible gas (such as, natural in tight fitting relation. Preferably there should gas 1025 B. t. u., city gas 550 B. t. u.) will be be one corrugation for each jet tube. Accordinguniformly supplied to the burner ports through- 1y, since, by way of illustration, I have .shown out the length of the burner, my burner with three jet tubes (2, 3, 4), the

It is also an object of the invention to produce burner body will be provided with three corrua gas burner of strip metal which is of simple gations (l8, i9, 28). Corrugation #8 will exstructure, easy to fabricate, long-lived, and eftend about one-third of the length of the burner ficient in operation. 30 body, corrugation l9 about two-thirds of the Fig. 1 is a side elevation of my burner. length of the burner body, and corrugation 20 Fig. 2 is a top view of my burner. will extend substantially throughout the length Figs. 3, 4, 5 and 6 are sections along the lines of the burner body, Burner sections 1 and 8 fit 33,44,55 and 6-6 of Fig.1. tightly together along the troughs 2| between Fig. 7 is an enlarged horizontal sectional view corrugations I 8 and i9 and also along troughs through the top jet tube of the burner shown in 22 between adjoining corrugations l9 and 20. Fig, 1 Since the burner sections come tightly together Fig. 8 is a fragmentary side elevation of a along troughs 2| and 22, it is not necessary to modified form of burner, and Weld these corrugations together but they can be Fig. 9 is a fragmentary top view of the same. welded along elongated contacts 2| and 22 if de- Fig. 10 is a section taken along the line Ill-i0 sired. of Figs. 8 and 9. Top corrugations [8 form top channel 23 Referring more particularly to the drawings, through which a mixture of combustible gas and my burner comprises a burner body, generally air is fed from jet tube 2 to substantially onedesignated l, to which a combustible gas is supthird of ports H. Corrugations l9 form chanplied through a plurality of jet tubes which, by nel 25 through which a mixture of combustible Way of illustration, are exemplified by jet tubes gas and air is fed primarily from jet tube 3 to 2, 3 and 4, which are positioned one above the the middle one-third portion of ports ll and corother and are threaded into a gas manifold 5 to rugations 20 form a. lower channel 25 through which a combustible gas under pressure is supwhich'a mixture of combustible gas and air from plied through a pipe line 6 controlled by a, conjet tube 4 is fed to the outer or right hand subventional gas valve (not shown). stantially one-third of ports I i. Channels 23 The burner body is made from two strips of and 24, of course, communicate at the end of metal 1 and 8 which are formed complementary troughs 2! as at 26 and channels 24 and 25 right and left handed. Members I and 8 are communicate at the ends of troughs 22 as at 21. placed together to form a body. Burner sections ,Thus, abutting trough portions 2| and 22 can I and 8 are preferably formed by stamping but also be considered as bafiles extending from the conceivably can be made as rolled sections. jet tube end of the burner approximately one- Each section 1 and 8 has its upper longituthird and two-thirds respectively of the length dinal edge portion 9 provided with a plurality of burner body I. Thus, the effect of corrugations l8, l9 and 20 is to distribute and direct the combustible gas-air mixture from jet tubes 2, 3 and -.4 through the burner body I so that the gaseous mixture is uniformly distributed to all of the ports ll. With my arrangement of feeding channels I have obtained a burner in which the gaseous mixture is uniformly distributed to ports H and the flames over ports II will be of uniform height during the operation of the burner.

The form of burner shown in Figs. 8, 9 and is identical with the principal ,form of burner shown in Figs. 1 to '7 except that ports II are divided by a thin strip of ,metal 30 running'lengthwise of the burner body, Strip 30 can be conveniently retained in place by spot welding the same at a plurality of points to trough portions l2 of the fluted edges of sections 1 and 8.

During operation of this modified form of burner ribbon 30 tends to lower the temperature of the burner at ports H.

Burner body I is preferably made from two strips of stainless steel.

The burner shown in Figs. 1 through '7, as an exemplification of my burner, has ports H the size of a #29 drill and ports II are spaced four per inch. The length of the burner body I is approximately 22 inches, the overall height in the area of section 4-4, 2 inches, and the thickness -7 of an inch. From the above dimensions it is evident why this burner has been characterized as a strip burner and why it has been defined as a long thin unit.

Gas is used herein generically to cover both combustible .gas and air or mixtures thereof.

I claim:

1. A gas burner comprising a hollow body formed of sheet metal the side walls of which are secured along one longitudinal edge, a row of substantially parallel flutes formed in the other longitudinal edge of each side wall of said burner, said flutes extending substantially perpendicular to the longitudinalaxis of said burner, the flutes in each edge being juxtaposed'in aligned relation with the flutes in the other edge and with the concave faces of the flutes opposed whereby the flutes form a row-of ports in the one longitudinal edge of saidburner, a plurality of lengthwise corrugations of different lengths in the side walls of said burner extending from one end of said body to said row of ports, each of said lengthwise corrugations in one side wall being juxtaposed-to a corresponding lengthwise corrugation in the other side wall and with their concave faces opposed and with their trough portions in contact substantially throughout their lengths, the-shorter corrugation being positioned between the said row of ports andthe next longer corrugation, said corrugations having their concave faces positioned inwardly of the burner body whereby the corrugations cooperate to form enclosed channels of different lengthsin the burner body and extending-from one end thereof .to saidrow of ports, and means 'at said end of the burner body for supplying gas underpressure into :said channels whereby the gas is distributed'by said channels to different portions of said row ofports, the shorter channel distributing gas to a portion of said row of ports closer to the jet tube end of said burner than the portion of said row of ports supplied by said longer channel.

2. The gas burner claimed in claim 1 wherein :said means comprises .a jet-tube for each of :said

4 channels and the jet tubes extend into the outer ends of said channels.

3. The gas burner claimed in claim 2 wherein said flutes and corrugations are stamped in said sheet metal burner body.

4. The gas burner claimed in claim 3 wherein :the number of lengthwise corrugations correspond to the number of jet tubes and the length -of each corrugation is substantially a multiple of the shorter corrugation whereby each of said v channels supplies substantially a corresponding number of ports with gas.

5. The gas burner claimed in claim 4 including a manifold communicating with said jet tubes for supplying gas thereto.

. 6. The gas burner claimed in claim 5 wherein each jet tube is provided with at least one port for supplying air to the combustible gas flowing through said jet tube and wherein the side wall of the burner is provided with an air inlet port adjacent the outlet end of said jet tube.

7. A gas burner comprisin a hollow body formed of sheet metal, the side Walls of which are secured along one longitudinal edge, a 'row of substantially parallel flutes formed in the other longitudinal edge of each side wall of said burner, said flutes extending substantially perpendicular to the longitudinal axis of the burner, the flutes'in each edge being juxtaposed in aligned relation with the flutes in the other edge and with the concave faces of the flutes opposed, whereby the flutes form a row of ports in one longitudinal edge of said burner, a plurality of lengthwise corrugations of different lengths in the side walls of said burner, said corrugations extending generally longitudinally of said body from one end thereof and being vertically spaced and inclined toward said-row of ports, each of said lengthwise corrugations in one side wall being juxtaposed to a corresponding corrugation in the other side wall and with their concave faces opposed and with their trough portions in contact substantially throughout their lengths, the shorter corrugation being positioned between-said row of ports and the next longer corrugation, said corrugations having their concave "faces positioned inwardly of the burner body whereby the corrugations cooperate to form enclosed channels of different lengths in the burner body extending from one end of said body to said row of ports,.-and means at saidend of said burner body for supplying gas under pressure into said channels whereby the gas is distributed by said channels to different portions of said row of ports, the shorter channel distributing gas to a portion of 'saidrow of ports closer to the jet tube end of said burner than the portion of said row of ports supplied by said longer channel.

8. The gas burneras claimed in claim? wherein the cross sections of the inclined portions of at least the longer corrugationsprogressively increase in size toward said row of ports.

JOHN W. MILLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 'Zimbelman et a1. "May 24, 19,49

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