US1648329A - Gas burner - Google Patents

Description

Nov. 8, 1927.

C. W. SIEVERT GAS BURNER Filed Feb, 2, 1926 55 Y' l lmade of castiron, vis provided withicrcular Patented Nov. 8, 1927. l

UNITED stares attana- -ga E 'gj-operi Ca. .Y u,

y "CHARLES W. sIEvER'LoF Los ANGELES-CALIFORNIA u i Y GAS BURNER.

Application filed February 2, 1926. Serial No.` 85,435.-

This invention'has to do with fuel gas burners; and it may belstated as a general object to produceV a burner capable of causing highlyeflicient gas combustion and capable, although not necessarily limited thereto, of burning a large amount of fuel and delivering a large amount ofY heat in asmall and simple apparatusV occupying a compara-v ficient amount of fuel gas could not beefficiently burned in the yrestricted space. My

'burnerhas been designedwith a' particular 7view to overcoming such dillicultiesand` to providing for Vthe high efficiency combusw tion of the comparativelylarge amount of fuel gas in a restricted space. "It willbe understood, however, that myl linventionl is -IlOt necessarily limited to such use, as'gi'ts simplicity and effectiveness still ,main tained even whenthe burner 1s used vin Arelativelysmaller sizes or for thefcombustion 1 of smallerquantitiesfof fuel AgasY in the unit l time. Y

The invention' itself Waite-'bea 'enderstood-,from the following detailed descrip,.-

tion of a preferred form of burner, reference for this purpose beingvhad to' theQaccom.-

v panying drawings in whichmy Fia 1 burnerg,

lis a rplan showing l innorved ne@ is a vefcalehtfai Setinffae same;

1 Fig. 3` is a horizontal sectionon line of'FigQand m .Fg. 4 v"s ar'verticlal lcentralsection similar Y toL :portions of 'Figi 2, "but, showing'the yburner 'with an additional' *element* applied .In ,the drawings I show at 10?'af'plate vwh'i'chfforms the base of theburner and `which maybe in any Vsuitable form orfsize for Vmountingthe burner in any1 kind of vfurnace chamber. In the particular'illustration here given, Hthis base plate formed to mount between two' sector shaped plates 11 4in a circularv furnace chambergand, to pro-. 'vide'ffor easy adaptation to furnace cham-v bers ofdifferent `diametersfthe base plate,

trally in" and grooves 12Von which the plate may be broken Y at its edgesto reduce its size.

. Base plate- 10 has it a central opening 13, and across this opening a web 14' carrying acentral boX lfbored and screw-threaded as at- 16 to receive thegas feedpipel 17 1` andthe noZzle 18,.the nozzlestanding ceny l above the vbase plate: open- .Around opening 13 the-base plate has a circul'arflange 19, spaced alittle outside the edge-of opening 13, and anfopen bottomed :cone-shaped cup 20 has a supporting flange 21 thatrs'ets on the ledge inside flange 19 and is confined in proper-'position by that n flange 19. The cup' thus Vlocated is'concentric `with 'openingfl and with nozzle 18. Thefconical angle' of'c'up 20 mayy be somewhat varied, to pass varying amounts ofair, n

depending upon the amount of Igas 'being burned.f^ Thus, to suit varyingfsituations, I supply, 1n'practi`ce,f"cups 2O of i somewhat varying' angles, and of varying diameters f of `Vbottom openings, -the smaller openings being used where less'gas is 'beingburnedg'and 'the 'larger openings 'being' `used'fwhere fthe quired.; Y v. Y Y

*Nozzle 18 has throughits circular'wall a plurality of gas'delivery 'orificesfQ spaced equally aroundL the'n'ozzle and' pointing-ra'-A burning'ofa larger-quantity. `of gas is rfcdiallyoutwa'rdly and upwardly at such an Y i angle that' the -gas proj ected through l these orifices would,'fif` it traveled.V 'on a'` straight line, strike the/inner surfacefof cup 20 nearv y oraboutfitsupperfedge.` In theaverageoperation-of the burner, howeventhe stream of air that l'ows upwardly through' the open cup bottom carriesthe gas jets somewhat-'upwardly from what would otherwisezbe their actually travels, upwardly through' the cup travels in'lines more Vor less parallel with the conical elements of the inner` Ysurface f of ther cup.` This line `oftravel" is indicated by the full line arrows on Fig. 2.v The air, passing rupfthrough thefopen cup bottom, is indi-f vcated inits travel'V bythe dotted line arrows, and-"from what Vis' indicated it. will be seen Straight-MHG Cf: Jilvel;sothat the' gas," as it that the air travelsllpwardly and outwardly between the gas 'jets andthe cup'surface, and

1 also traveling over the gas y'jets and in the samegeneral directionas thosejets`. 'In kthe bothbelow and above the gas jets, traveling 4 Y V 'fornir of "device shown in Fig. 4 where ac'one- --shaped cap30jis used,lthe=airjthat travels' over the gas jetstravels between'them and the lower conical surfaceof the cap. At

. the same time, in either form of device, the

air that passes upy through the open cup bottom passes upwardly 'between the spaced gas jetsas will be readily understood from av consideration of vFig. 3; and as a result of all this it will be seen that each gas jet in ioY f andV air have mixedsufiiciently to form a Y combustible, mixture, in theform shown in vice,y the Fig. 2, combustion Ybegins to take place in the usual case within the cup, and continues to` take place above thecup until'all the fuel is consumed. VDue to the nature of the'deoutward and upward travelof the gas jets, and the -outward travel of the air with thejet's, and the travel of the air between and around the jets, avery uniform 4and intimate mixture is attained, and, consequently, afve'ry uniform combustion of high Vefficiency is attained.V

In the form shown in Fig. 4actual combustion does not Astart until the mixture has reachedia point somewhat beyond the upper edge of the cup. In` this form-it; will be seen lso that Vthe cup and cap confine between them a'fsort vofcone-shaped chamber that is iiiV `effect afmixing chamber, v'in which combuslo upon itself, keeping.

\ tion is 4inhibitedlby reason of the A comparatively .heavy metal. walls of Consequently,

the cup and cap. in this form,VV combustion does not start until the mixture has passedout of this` mixing chamberspace. In some cases also the cap is useful in preventing the flame from .curvingy upwardly and then inwardly the flameV spread and ,thus helping goodi mixture of the gas` and air.

' The: air admitted through the open cup bottom is sufficient in volumeto form a perfect or nearly perfect combustible mixture Vwith the fuel', but itis desirableV and useful vinfthe average case tofsupply auxiliary air 'around the outside of the burner. This' is done by having a4 plurality ofV air holes 35 through the base, and avcontrol ring 36 with 'corresponding holes 37, rotatableonthe baseV around circularllange 19. Air holes 35 and 37 are located-closely under thev edgefof cupV 20, so` that the auxiliary air, passing upthrough those holes, is drawnquickly -upy wardly into theupwardly and outwardly flowing gases of combustion.` Control ring 36may conveniently vhave a handle lug 38, and a stop lug 39 that plays between the two stoplugs 40 on base plate 104. Pilot-burner :pipe 41 extends up through plate -10 and 'through a"slot z42in ring 36.'

In thev specific :form' and designhereiii shown the conical face 30a of cap 80 is par- (5' `allel tothe conical face of cup 2O;k but that relationmaybe varied by'increasing or. de-

creasinglone or both the conical angles. For instance, if 1t is desiredtofurther increase the gas expansion toward the outer edges of the cup and cap, the cup and cap angles may faces, allowing air to flow completely around each jet and between it and'both conical surfaces v f ,y

It will be understood that my burner is so mounted that all the air must comeup through the central cup or through the auX- iliary air openings. All air is excluded fromk flowing up around theioutside edge of plate 10, usually by that plate ittingthe combustion chamber tightly Thus, by proper manipulation, the correct amount of total air may be given the burner; and as much of that air as possible is caused to passv up through the central cup. By using a cup Vwith a proper sized hole, andproper adjustment of the auxiliary .air

holes, the desired Y large proportion ofl air isput through` the cup. And both Athe flamedraft andthe gas jets tend'to drawv air through the cup. I claimz. i' Y 1. A gas burner includingr in .combination a base plate with a circular air aperture and a web crossingrbelow the aperture, an up-z.

standing cylindrical nozzleqmountedf cen'- trally on the web, the nozzle standing centrally in and abovethe aperture, va circular flange Von the upper, face ofthe base plate around the air aperture, an open bottom cone shaped cup ,resting on the plate withink the.

iio`

flange, the nozzle having gas orilicesplaced to deliver4 gas jetsin a conical surfacefabove the cup, but at an angle more nearly .horizontal thanthat ofthe cupsl conical surface,

the base plate having a series ofvairzholes arranged in circular formation` outside the flange andfbelowA the outer cupv edge, `and al Y rotatableperforated control ring resting. on

the base plate over said holes and surrounding the flange. i

'2. A gas; burner including incombination a base plate with a circular air aperture and e a web crossing below the apertura-.antipstanding cylindrical nozzle mounted centrally on' the web, theV nozzle standingv centrally'in and above theaperture, acircular l flange on the upper `face vof the base plate -around the air aperture, an openbottom cone shaped cup v resting font vthe plate 'within' the flange, the. lnozzle having gas orifices. placed to deliver gas jets in a conical surface above the cup but at an angle more nearly horizonf tal than that of the cups conical surface, the

base plate having a series of air holes varranged in circular format-ion outside the flange and below the outer cup edge, and a rotatable perforated control ring resting on the base plate over said holes and surrounding the flange, and an inverted cone shaped cap mounted on the nozzle, the conical surface of the cap being substantially parallel to that of the cupl and spacedA above itand above the gas orifices, so that the gas discharged from the orifices is projected between the cup and cap surfaces.

3. A gas burner including in combination a base plate with a circular air aperture and a web crossing below the aperture, an upstandand above the aperture, a Acircular flange on -ing 'cylindrical nozzle mountedcentrally on I i the web, the nozzle standing centrally inv the upper face of the base plate around theA air aperture, an open bottom cone shaped holes arranged in circular formation outside,`

the flange and below the outer cup edge, and a rotatable perforated control ring resting on the base plate over said holes and surrounding theV flange. f

, In .Witness that I claim the foregoing I have hereunto subscribed my name this 15thday of January, 1926. y

, V'CHARLES W. SIEVERT.

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