US1727527A - Tubular burner - Google Patents

Description

sept. 1o, l1929.` R. THURM 1,727,527

TUBULAR. BURNER Original Filed Oct. 15, 1925 INVE TOR l Patented Sept'. 10, 1929.

UNITED STATES RICHARD THUBM, F 'SAGINAW, MICHIGANQ PANY, INCORPORATED, OF SAGINAW, MICHIGAN,

renom Bunyan ASSIGNOR T0 BAKER PERKINS COI- A CORPORATION OF NEWVYOBX.-

Original application illed October 15, 1925, Serial No. 62,511. Divided and this application med January 31, 1928. Serial No.' 250,849.

This invention relates to burners for illuminating gas, producer gas, water gas, vaporized oils and similar fuels, and partie'- ularly to the long tubular burners which are used for burning mixtures of gaseous fuels and air in substantially yoxygen-free atmospheres as, for example, in baking ovens. When the ordinary long tubular burner supplied with a combustible mixture of air an gaseous fuel is located so" that the combus' tion at its outlets takes place in a lmore or less confined space in an atmosphere that is substantially free from or at least deficient in yoxygen and raised to a comparatively high temperature, there is liability to objectionable and somewhat dangerous backiiring and explosions.

The principal object of the present invention is to provide an improved burner so constructed as to prevent such back-firing and explosions and to insure a continuous and substantially uniform combustion throughout the length of'the burner.

Vith these and other objects in view, the invention comprises the novel and improved features, constructions andr` combination of parts hereinafter described and particularly pointed out in the claims, the advantages of which will be clearly understood and appreciated by those skilled in the art.

This application is a divisional application based upon certain subject matter contained in a prior application, Serial No. 62,511, filed October 15, 1925, by Richard Thurm and Eugene Oscar Engels.

The invention will be clearly understood from the accompanying drawings illustrating the invention in its preferred form, and the following detailed description of the constructions therein shown.

In the drawingsn i Figure 1 is a View in side elevation ofra' oven and its connection to thei'n'eit'ns for sup'- plying fuel thereto; p k1 y Figure `2 is a vertical sectionalv view through heburner taken on the' line 2-2 of Figure 1;

Figure 3 is a top plan View on an enlarged scale of a portion of the burner; and

Figure 4 is a detail vertical sectional view illustrating certain parts of the burner removed therefrom.

Inthe illustrated embodiment of the invention, the burner includes a suitable fuel chamber to which combustible fuel is supd rplied from a suitable conduit which preferbly extends substantially throughout the length of the' fuel chamber. This conduit is supplied with combustible fuel from a fuel main to which the fuel is supplied from a mixing device which in turn has connection with suitable means for supplying the different elements of which the fuel is composed. From the fuel chamberlthe fuel is discharged and burned at the point of discharge.

One type of chamber which has proven quite successful in actual operation consists of a tubular member 14 substantially circular in cross sectional form. This tubular member 14 is provided with an elongated opening preferably in the form of a the length of which is determined by the length of flame desired. In this type of burner a conduit l is employed and this conduit extends preferably throughout the entire length of the chamber formed by the 'tubular member 14, as indicated by dotted lines in Figure l. This conduit 15 is of tubular form, semi-circular in cross section and, as shown in Figure 2 is( located in the lower portion of the tubular member 14 with its plane wall positioned upwardly, thus providing a fuel chamber 2G.v Suitable dischargeJ openings, staggered perforations 2l, are provided in the plane wall of the conduit 15 and these discharge openings serve to permit the fuel j to pass from the conduit 15 into the chamber 120, .formed by the tubular member 14 in a burner embodying the invention showings' its arrangement in the chamber of '1a' vbaking manner which maintains a uniform pressure of fuel in the chamber/20. ,Fuel is supplied' yto the conduit 15 by means of a suitable pipe w t controlled byva` valve 8 and connected to a combustible fuel supply in the form of a fuel main 7. Combustible fuel is supplied slot 16,-

such for example, as the,

to the 'fuel main 7 from a suitable mixing y.

v device 9-to which the elements of the fuel be provided with suitable means, which forms a pluralit of relatively long through w ich the fuel passes in lts discharge from the tubular member 14.

To obtain the aforementioned results a suitable structure is positioned within the elongated opening or slot 16V and this structure preferably com rises two parallel bars 0r plates 24 which orm side walls for the elongated opening and slot 16 as more clearly shown in Figure 2. These side walls are retained in spaced relation b means of 'a suit'- vable distributing element w ich in the present instance is shown as a length or-strip of wire mesh Aof substantially the same width as the plates 24 interposed between said plates. This structure, including the plates 24 and the wire mesh spacing and distributing member 25 may be secured together to form a unitary .structure by a suitable fastening means such,

for example, as rivets 26 arranged in suitably spaced openings 29 provided, in the plates which form'the side walls, and said plates 24 are maintained in predetermined spaced relation b ysuitable spacing members 30, which prefera ly surround the Yrivets 26.

As shownA in Figure 2 this structure is positioned in the opening or slot 16 and is prefer- I ably adapted to rest upon bolts 22 which extend transversely of the tubular member 14 and are positioned in suitably oppositel disposed openings therein. It will be note that the bars forming the side walls 24 are of such .outer edges of t .resting -upon the bolts 22. After the bars or a width that the project slightly beyond the lie openin 16 when they are side walls 24 have been positioned in the opening or elongated slot 16 nuts 23 carried vby the transversely extending bolts 22 are tightened and theY tubular member 14 is contracted until the sides of the slot 16 engage their respective side walls 24, and u n further tightening of the nuts 23, the si e walls 24 and the wire mesh s acing member 25 will be firmly clampe in position in the elongated opening 16 and the edgesp of the elongated opening 16 by reason of their contact with their respective side walls 24, will form a gas-tight joint therewith to preclude the ssibility of fuel escaping around the outsi e of the side walls 24.

The unitary structure which comprises the i side walls 24 and the wire mesh spacing member 25 may also be retained in the elongated opening 16 by means of end plates 27 which` assageways opening. If desired, one or more clips such as 40 may be employed between the ends of the elongated opening 16, said clips being so formed as to overlie the plates 24 to serve to retain them in position. Each of these clips is secured to the tubular member 14 in any desired manner, a screw 41- being herein shown for this purpose.

By this construction, it willbe apparent that the space between the side walls 24 will be e divided by the wire mesh member 25 into a plurality of sinuous passages through which the fuel is caused to pass in its dicharge from` the'tubular member 14. It has been found that such a structure, that is, one which discharges the fuel through relatively long passages, gives highly satisfactory results and materially aids in tl1e`proper combustion of the fuel at the combustion points.

By varying the mesh ofthe spacing mem-r ber 25, the burner is readily adapted to use with fuels of different character, and in this manner also the volume of heat produced by the burner may be controlled.

A burner construction in accordance with the present invention has many wide and varied vuses. It is herein shown as a burner for baking ovens and it is'to be understood that several. of these burners are employed for heating the oven. The burners may be supported from the opposite walls 10 and l 11 of the oven, as shown in Figure 1, and between these walls 10 and 11 suitable supports 12 extend transversely of the burners to prevent sagging thereof between their,I ends.V

While I have described a referred embodiment of my invention, I rea e that it may be embodied in widely dilerent forms other than that shown and I, therefore, do not limit myself to the particular construction illustrated and described herein.

` What. is claimed as new is:

1. A gaseous fuelburner comprising a coniis duit for gas jand the like having an elongated discharge opening therein, and means for controlling the flow of gas through said opening, said controlling mea-ns'comprising a plu-A rality of check bars extending longitudinallyof said opening, and wire mesh inte used therebetween to maintain them in space rel.- tion, said check bars and Wire'mesh project ing into the conduit to provide relatively longA -passa es for the fuel.

2. gaseous fuel burner comprising a conduit for gas and the like having an elongated discharge opening therein, and means for vcontrolling the-flow of gas through said openi in said controlling means comprising a plura ity of check bars extending longitudinally of said opening, and Wire mesh inter osed therebetween to maintain them in sV ace rela-- tion, said check bars and Wire mes being of substantially the same length and width ,and projecting into the conduit to provide relatively long passages for the fuel.

3. A gaseous fuel burner comprising a cnduit i for gas having an elongated opening therein provided with Walls extending longitudinally thereof, said walls being spaced apart, and a single layer of wire mesh interposed between and engaged by both said walls to provide passages for the fuel..

4. A gaseous fuel burner comprising a conduit for gas and the like having an elongated opening therein provided ,with Walls running longitudinally thereof, 'said walls being spaced a art, and a single layer of Wire mesh of a wi th substantially equal to the width of the said walls, said Walls and Wire mesh ex tending into said gas conduit.

5. A gaseousfuel burner comprising a conduit for gas and the like having an elongated burner opening therein7 a pair of check bars mounted in said opening, and a single layer oiwire mesh interposed between said check bars and engaged by the inner surfaces of the bars to space the bars and formpassages for the fuel. y

6. A gaseousy fuel burner comprising a conduit for gas and the like having an elongated opening therein, and means for controlling the iiow of gas through said opening, said means including check bars mounted in said opening, and a single layer of wire mesh interposed between said check bars, said check bars and wire mesh extending into said con-v duit to form elongated passages'for the fuel.. Signed at Saginaw, Michigan, this 27th day of Jany, ll92v8a RICHARD THURM.

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