US1758628A - Tubular burner - Google Patents

Description

May 13, 19301 R. THURM ET A1..

' TUBULAR BURNER iled oct. i5, 1925 :5 shee'tsfsheet 1 w .Sk

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Y May 13, 1930. R. THURM ET Ax.

TUBULAR BURNER Filed Oct. 15, 1925 5 Sheets-Sheet 2 1 INV N'ToR.

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ATTORNEYS.

May 13, 193m 8 2 M, 5 N 7 e 0 1 T S A L e e n.. S L 5 A m m mv hw n m l M B N o o U o m m t. o o \o o o o ww C .I J 11` .nl J l. l. l .1 l. 1. .l l .l 1... ..l 1.. ...l1 1 .I H UD 0 1 .1 1 1 11 1 1 w 1 1 11.1 1 F 11.1 1 1 1 R m .S N Vi H 3 1 /\l 1 1 Mw w 1 1 1 1 1 1 1 1 1 1 1 1 1 |1 |1\|1 1 11.! RR a .l .1. .1. 1 v mw E HUM 1111111 1 1@..11U1|11.111 Wm H H11 MOH1H111111 1H111111 MHH H11OU1111111H1111M M H H u Wm H @www Patented May 13, 1930 UWE 12;

4RICHARD THURM AND EUGEN'E OSSCAR ENGELS, OF SAGINAW, MICHIGAN, ASSIGNORS T BAKER-PERKINS COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW TUBULAR BURNER Application led October 15, 1925.' Serial No. 62,511.

This invention relates to burners for illuminating gas, producer gas, water gas, vaporized oils and similar gaseous fuels, and particularly to the long tubular burners which are used for burning mixtures of gaseous'fuels and air in substantiallyoxygen free vatmospheres as, for example, in baking ovens. When the ordinary long tubular burner supplied with a combustible mixture of air and gaseous fuel is located so that the combustion at its outlets takes place in a more or less conlined space in'an atmosphere that is substantially free from or at least deficient in oxygen and raised to a comparatively high temperature, there is liability to obJectionable and 'Sometimes dangerous back-iirn and explosions.

An object of the present invention is to" provide a burner so constructed as to pre-- vent such backtires and explosions and to insure a continuous and substantially uniform combustion throughout the lengths of the burners.

Reference is had to the accompanying drawings showing various embodiments of the invention in which Y y Figure 1 shows a burner constructed in accordance with the present invention, the view being in side elevation.

Figure 2 is a vertical sectional view through the'burner taken approximately on the line 2-2 of Figure 1.

Figure 3 is a top plan view of one end of the burner. i

Figure 4 is a longitudinal vertical sectional View ofthe burner.

Figure 5 is a vertical sectional view taken on the line 5 5 of Figure 4.

Figure 6 is a. view in elevation of one of the elements of the burner. I

Figure f7 is a vertical sectional view of a slightly modified form of the invention.

Figure 8 is a top plan view of the modified form of the invention shown in Figure 7.

Figure 9 is a longitudinal sectional view of a stillfurther modified form of the invention.

Figure 10 is a vertical sectional view of the form of the burner shown in Figure 9 the view being taken in a plane at right angles 50 to said Figure 9.

Figure 11 is a vertical sectional view of that form of the invention shown in Figure 9, and taken on the line 11-11 of said Figure 9.

Figure 12 is a detail bottom plan view of 55 a portion of the burner employed in the Inodified form of the invention shown in Figures 9 to 12 inclusive.

Figure 13 is a longitudinal sectional view of a still further modified form of the invention, and l Figure 14 is a vertical sectional view taken on the line 14-14 of Figure 13.

Referring more specifically to the drawings, and particularly to Figure 1 the referencev character 25 designates a burner of the type known as tubularf In bakers ovens, and in similar heating apparatus several of these burners are employed and in such an installation each burner is connected, by means of a pipe section 26, with a gas supply main 27. Each pipe section 26 is preferably provided with a valve 29 by means of which individual operation of the burners may be controlled. The gas is supplied to the main 75 27 by a suitable mixing apparatus 28 which serves to supply to the gas the proper amount pf air to insure an efcient combustible mixure.

In the present embodiment of the invention, these burners extend from the rear wall 30 through the frontlwall 32 of the chamber to be heated and, aiding in the support of said burners 25, there are cross members 31 which in the present instance are in the form of channel irons. The front wall of the chamber ispreferably provided adjacent to 'each burner with an observation door 33 by means of which the burner may be from time to time inspected as to its operation.

The burner 25 comprises a suitable conduit, such as a tube preferably circular in crosssection, and said tube is provided with a slot 44 extending throughout the major portion ofthe length thereof. Mounted within the burner 25 is a second tubular member 34 which is preferably substantially semi-circuvlar in cross-sectional form and is positioned in the burner 25 with its flat wall extending across the diameter of the burner 25 and with 100 its curved wall conforming tov the curved wall of the burner 25, as is clearly shown in Fi ures 2 and 7.

t is this inner tube 34 which receives the gas from'the main 27 and delivers the gas through the Hat wall thereof to the tubular burner 25, the flat wall bein@r formed with a plurality of perforations 41 iior this purpose. Carried by the outer end of each burner is a coupling, which coupling 'comprises two flanged collars 39 and 40 which have threaded connection with the burner 25 and the pipe section 26 res ectively. Interposed between the flanges-of) these collars 39 and 40 is a plate 37, which, in turn, has an opening of a shape corresponding to the cross-sectional shape of the inner tube 34. This opening receives the end of the inner tube 34, which latter is flanged as at 38 for the rece tion of securing meanspreferably in the form of rivets 38 which serve to secure the inner tube` 34 to the plate 37.. Suitable bolts 39 pass through the flanges of the flanged collars 39 and 40 and a suitable packing 40 may be employed if desired.

' Xtending transversely of the burner 25 are bolts 42, which bolts are spaced with respect to one another, and are so positioned .as to overlie the inner tube 34, One end 0f there are` two of these check bars 45 .ar-,

ranged in spaced relation to each other.

Positioned betweenV the check bars 45 is a bar 50 which is maintained in spaced relation with respect to these `check bars by means of a wire 49 wound 'spirally around the -bar I50 in such a manner that when said bar is in place between the check bars 45 passages 52 etween the'wire, the bar 50l and the check bars' 45 are provided which passages permit of a free flow of the fuel from` theburner. This assemblage, that is the check bars 45 and the bar 50 is retained in assembled relation by means of rivets ,or the like 51 andis retained in position within the slot 44 of the burner 25 by means of a pluralit of over- V lying lingers 46 and by a tightemng of the nuts 43 on their bolts 42 which latter causes a contraction of the slot 44 suiicient to move the sides of said ,slot into engagement with the check bars 45 and form a tight joint therewith.' At each end of the burner 25 there is a plate 47 secured to said burner by cap screws or other suitable fastening means 48 and this plate is shaped to conform to the eaterior of the .burner 25. By means of this plate 47, escape of fuel around the check l bars at'the ends of the slot is prevented.

' When a burner havinga double flame is desired, a construction such as shown in Fighereto ore jdescribed form of the invention. Y i rThe two bars 53 and 54 are positioned within the slot 44 of the tubular member 25 of the burner, it being understood that the slot 44 in theftubular member 25 in this form of the invention is of greater width than in the previously described form of the invention and of suflicient width to accommodate the two bars 53 and 54, a spacing bar 55 and the two check bars 45. The check bars 45, the two bars '53 and 54,and the spacing bar 55 are secured together in a unitary structureby suitable fastening means illustrated in the present instance as rivets 56, and this entire assemblage is retained in the tubular member 25 of the burner by the curved fingers 46 and the plates 47 heretofore mentioned.

In Figures 9 to 12 inclusive is shown a still` further modified form of the invention in which the inner tube 34 is dispensed with, the das entering the tubular burner 25 direct. In t is form of the invention, the check bars 57 are spaced by a bar 60 around which the wire 49 is wrapped to provide passages 62, and these parts are secured in this relation by suitable fastening means such as rivets 64.

In order to provide a chamber between the check bars 57 and bar 60,- which chamber is designated by the reference numeral 61, the

bar 60 is relatively narrower than the check' bars 57 and has its upper edge positioned flush with the upper edges of the vcheck bars 57. The bottom wall of the chamber 61 is .formed by a plate 59 secured to the check .bars 57 as at 58, and to permit of gas entering this chamber 61 the plate 59 is formed with a plurality of openings 63. In' this form of the invention the assemblage comprising the check bars 57 and bar 60 are fixed together 4by rivets 64 and secured in position in vthe slot 44 of the tubular member 25 by the fingers 46 and plates 47 in the same manner as heretofore described, and for the purpose of closing the ends of the chamber 61 plates 65` are provided.

In Figures 13 and 14,-a still further modil fied form of the invention is shown in which the check bars 66 are formed with a plurality of openings 67. The bar 69 around which the wire 49 is wrapped to provide fuel passages 73 is of such a width or depth that its lowei` edge will occupy a position above the openings '67 and will therefore not obstruct the nvaaeae 3 passage of fuel therethrough. This bar 69 is held in position between the bars 66 by means of rivets or other suitable fastening means designated by the reference numeral '70. A bar 71 is secured between the inner edges of the check bars 66 by suitable fastening means which in the present instance is illustrated as rivets 72 and this constructign provides a chamber 68 which has communication with the interior of the tubular member 25 through the openings 67 in the bars 66.

ln those forms of the invention in which the bar about which the wire 49 is wrapped is relatively narrow, the Wire is so wrapped' that it presents a greater number of convglutions in a given length than is the case where this bar is of greater width thus providing relatively7 narrow channels which are designated by the numeral62 in Figure 9 and the numeral 73 in Figure 13.

lt will be observed that in each of the embodiments above illustrated the tube 25 is one form of a `conduit for gas and the like, which has an elongated opening therein, preferably but not necessarily formed asa narrow slot, and that this slot is provided with side walls which in the preferred embodiment are at least in part located within the slot and are spaced apart considerably less than their width, so that when there is inserted between them mechanism, in any of the various forms shown, which form gas passages at the exterior surface, each of these passages is narrowand relatively long from inside thetube i outward, so that the gas has to pass a distance considerably greater than that between the plates, before issuing at its burning point. The distance between the plates may be whatever seems feasible in the particular installation and with the particular kind of gas and pressure existing. No specific sizes for all the various conditions are necessary here as these will depend on conditions present. But the arrangement shown results' in forms which'experience has determined will substantially prevent all danger of back firing and at the same time will insure a burner construction which will serve to maintain in operation the gas ames in spite of the heavy steam or moisture often present in baking ovens of this character.

While we have described above various embodiments of our invention, we realize that it may be embodied in widely diierent forms other than those shown. We, therefore, do not limit ourselves to the particular constructions illustrated and described herein.

What is claimed as new is:

l. A gas burner comprising a conduit having an elongated opening therein, an elongated bar mounted in said opening, a spacing strip wound about said bar, and surfaces enaging the stri onfeach side of the bar to rorm a series o gaspas'sages on each side of said bar.

2. A gaseous burner comprising a conduit for gas and the like having a slot therein, side plates located in said slot and spaced from each other, a passage-forming means between said plates comprising a bar and a strip wound about saidbar thereby forming a series of gas passages on each side of said bar.

3. In a gaseous fuel burner, a chamber having an elongated slot 'formed therein, two elongated plates extending along said slot and projecting within the burner, a third elongated plate interposed between the first two plates and a length of wire wrapped about said third plate in spiral form to maintain the same in spaced relation to the rst two plates so as to provide a plurality of individual fuel passages on each side of the third plate between the same and the first two plates.

4. A gaseous fuel burner comprising a tubular member having an elongated opening, two spaced elongated bars extending along said opening and projecting within the conduit, a third bar of less width mounted between said lirst two bars, the first two bars extending beyond the third bar within the conduit, spacing means interposed between the third bar on opposite sides thereof to space the same from the first two bars, a bar extending along the inner margins of the first two bars to form a chamber between the same, and means for delivering gas from the conduit into said chamber.

Signed at Saginaw, Michigan, this 9th day of October, 1925.

RCHRD THURM. EUGENE OSCAR ENGELS.

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