US2117944A - Gas control valve - Google Patents

Description

May 17,` 193.8.: A. 'cocHFNE 2,117,944

GAS CONTROL' VALVE Filed Nov. A29,1953

Pima-Mimes' v 2,111,944

. Gas CONTROL 'VALVE I Adam B. Cochrane, Elyria, Ohio, assigner to i Roberta-Gordon Appliance Corporation,4 Buifalol,N,Y. i` n Y :figUm-@Digium PATENT ,m-

e i epilation Nevemter ze; 1933, serial No; '100,213 s claims. (cn 15s-11s) vThis invention relatestoimprovements in mixvalve vshowing some of the leaves or segments ing devices for use in mixing two or moregases. in their operative positions l in the 'housing l In supplying a combustible mixture of air 'and member; l gas toagas burneroi the kind in which air is lFig. 8 is a similar view of the stationary or 5 usedlsvunder vatmospheric pressure, vit has been xed housing member of the gas control valvev 5 found possibletoprimarily mix with vthe gas only showing some leaves or lsegments in' place f o, as limitedportionoi the air necessary 'for comthereon; l l

' plete combustion of the gas, vand additional sec- Fig. 9'is centralv sectional view online lf-l,

i l, onder;1 air lor complete combustion is `generally Fig. 3;

10. supplied to theY primary mixture at `the llame. Fig 10 is a perspectiveview ofone of the`10 It is well known that higher eiliciency oi comvleavesoi segments; Y, f

bastion is obtained when a larger percentage'of Fig. `ll is a fragmentary sectionalview on an airis mixed with the gasin the primary mixing enlarged scale on linen-lling. 8.`

' ed`t` i device,.since secondary'air cannot 'be as inti- This invention may be app o ,any mixing .15v mately ymixed with the primary Vmixture as -is device for mixing two or Vmor'eilulds and in 'the 15 l desirable for the most ei'ilcient-combustion. particular 'ozzonstruction` shown in theldrawing', the n ,i The objects of this invention are to provide a device is shown as applied to a mixing device for mixing devioe'which is so formed as to produce gas burners, such as shown` in the patent `to aijet of gas of the correct shape or form to en- Roberts No..1,809,425 of June 9,- 193,1. This mix- 2Q j` able 4it to mixwith a larger percentage of air ing device includesa mixing tube Ifl', only `one end 20k than has been the with burners' lheretofore of which is shown in Fig'. 1, andwmchprferably made; also to provide a mixing device of `this tapers toward the receiving end thei'e iE;.-/To` the l having anadjustable discharge aperture for smaller end of Lthe tube a bell-shapedshell i2 is lthegas and which'in its kdifferent adjusted posipreferably secured. The largerfopen end of this proximatelyto the cross section o! the portion of mixfng tube SS ShQlllfbi? the. B'IQWS 'in F13 1- gthe mixingl tube `with which `the gas jet contacts, This bell; in the constructionshowmhas aV yoke endteresnnette discharge of gasto'sucn mime;` 'of strap u .secured thereto; wincngsappom'. a.'

falsoto provide a mixing device ofthls-kind whleh sleeve or duct i4, the outer endll of which may '3 0' .may be arran led at thedlscharge end oi the gas be suitably connectedjwith a. supply of"ga`s.1 Pref 30 supply passage "or duct and which is adjustable erably, thestrap has a Athreaded]central hole by turning one of the outer sneu or housing memin .which the duet er` short, tube Ijs `may pe se.- I bers containing an iris diaphragm, so'that no, cured by providingja correspondingthread on opening lthrough which an adjusting member the outer suriacethereofgand,anaircontrolpiate '33 extends into thehcusing is necessary, thus also or disk. i5- preferably hasy afthreaded engagement 35 avoiding the escape of gaslthrough such open- `with the threadedexterior of thesleeve i2 as lQing.; also to improve thecon'struction of gas de- `to permitthis disk tob'emovedtoward from E. ,viceof this kind in other respects hereinafter the belleshaped shell`4 i4 byiturningltheplate vil' spec ed. ,l

i l l relatively to the sleeve" I4, to regulate the X4914 `In the accompanyingdrawing:l l of air entering.1 the shell. 1 Anyf other means for 4o ,'Fig. 1 is a fragmentary' trai. sectional yview, resulatigthe Supplybf air t0 theflnixin devic of a mixing device mcludinglmproved means emmay; of course. beempyed. if 'desired bodyin'g n vention for controlling the supply4 Heretofore, it has been customary.y to lprovide Zas to the mixing device: l adjustable valves" of" various kind "at the dis- 4 tations, always forms an orifice corresponding ap- Shell j receives'. air .andfdirects the4 air', into (they 25.

45 Fig. 2 isy end view thereof; A charge end ot a gasA supply duct, such vas* j the ,45`

"`Fig. 3 is' a` `faseview o! the discharge end' oi sleeve il, so that the amount of gas liulrnitted to the ,gas controlf'valve, removedfrom the mixing the mixingdevice mayfbe regulated; In order'to ."devicel" I f provide thejmost emci'ent mixing otair1witli^gas,

" Fig. `lis a fragmentary side view thereof; Y it is.V however, x'xecessary 'to yhavetlie` `gasffclis- Ijoltvthecontrolv valve: o

6,18 a mmona'lfvlew on une H, Fis. 4, as to kformiwith-ftl're'wallsfoffthistube afvery l "n mangime? f acute angle." wnen'thistypefoffjeeemthe n MIL qliggvlew showing theinterior 0f the, niixingtbgitldrawswithiirme maxim ummm. ustable housing memberbfthe gfeontml my tutti n,

y o'` Fig. 5is afiaoel .view of the gas receiving end chargedintothe'mixingfdevice inftliefformof a 50 is lili*V heretofore made,.the valves for controlling the discharge of gas to the mixing tubes generally discharged jets of varying cross sectional shapes, depending upon the valve openings, the shapes of the jets being materially changed by adjusting the valves, so that even if such valves formed a correct jet for one discharge opening of the valve,

the jet would be deformed by adjustment of the valve. Still other valves were objectionable for the reason that in addition to discharging gas through the discharge orifice, they permitted escape of gasv through other openings in thelvalve -housings, which gas would mix with the incoming primary air vand thus reduce the amount.

of primary air that could be mixed with the gas in the mixing device, which in turn reduced the efficiency of combustion. In my improved iris4 My improved valve includes a nozzle or housing part I 1, which is suitably secured to the discharge end of the sleeve 'I4 or other gas supply duct and for this purposein the particular construction shown, the nozzle is provided with a screw threaded portion I 8 adapted to engage a corre-v spending internally threaded partof the sleeve |4. The inner wall of the nozzle I1 is preferably tapered and provided with a discharge aperture I9, preferably of smaller diameter than the internal diameter of the sleeve I4. 'I'his nozzle II forms a part of the housing of my improved valve and is provided near the discharge end thereof with an annular outwardly extending flange or shoulder 20 which cooperates with anj other housing member or shell v22, which is of cup-shaped form and the cylindrical portion or flange 23 of which is rotatably mounted on the nozzle portion Il ofthe housing. In order to rotatably hold these two parts of the housing in 'correct relation-to each other, the end portion of the flange 23 is screw threaded and engages with a threaded sleeve or member' 24, which engages the shoulder or harige to hold the housing part 22 in correct relation to the nozzle I1, and at the same time to permit rotary adjustment of the housing part 22 about the axis of the valve. The adjustable housing part 22 is provided with a oentral aperture 25 which is in registration with 'the aperture I9 of the noz'vzle I'I. The connection described between the two housing parts not only permits adjustment of one part relatively to the other while holding the parts againstseparation, but at the same time, the connection is substantially gas-tight, so that-gas entering the valvehousing can escape only through the aperture 25 thereof. 'Any other means for connecting the two housing parts in such a manner as to permit adjustment of' one part relatively to the other part ahout the axis of the valve, may be provided.

The control of the gas discharge orifice of the I' valve is obtainedby means of a plurality of leaves or segments 28 `which may be of any suitable or desired form, each leaf having a pivotal connection with one ofthe housing parts and a sliding connection with the other part so that each leaf may be moved toward and from the axis of the apertures 25 and I9 of the valve, as in an iris 2,117,944 to complete combustion. In mixing devices` diaphragm. In the particular construction shown, each leaf is provided with a projection 29 near one endthereof and extending outwardly beyond one face of the leaf, and near its other end, the leaf is provided with the projection 30 extending beyond the opposite face of the leaf. These projections may be of any suitable or desired form. and as shown in thedrawing they are in the form of integral projections which, when the leaves are made ofV sheet metal, may' be formed by pressing portions of the leaves outwardly by means of a die.

the two housing members ,such for example asy an integral flange 32'projecting outwardly from the nozzle member I1. the outer end of which ange is engaged by theinner face of the housing member 22. Any other means may, however, be provided for forming the desired space for the leaves between the two housing members. The outer face of the nozzle memberV I 1 ofthe housing is,in the construction shown, also provided with a series-of substantially radially extending slots 33 which may be milled, or other- .wise formed in the end of the housing member II,

and which may, if desired, extend through the ange or projection A32 for convenience in machining. Each of these slots is'a'dapted to receive one of the two projections of a leaf 2a of the iris diaphragm, as shown in Figs. 6, 8, 9 and 11. The projection; on theother end of the leaf and on the opposite face thereof, extends into a corre# sponding depression 84 in the inner surface of the housing member 22, as shown in Figs. '1 and 9. These depressions may be formed inthe housing member in any suitable manner. for example, -by stamping, drilling or otherwise. Consequently,

when the leaves ("of, the diaphragm arearranged valve so that the discharge orifice of the valve is' correspondingly controlled. In order to limit the extent to which the members of the hous- 'ing can be adjusted relatively to each other, van

arcuate recess 25 may be formed in the outer portion of the housing member I1, and a pin or projection 36 secured to the other housing member and extending into this recess will contact with the ends ofthe recess to limit the extent to which the housing member 22 may be turned relatively to the housing nomic I1'.

ing members may, of course, be employed'.

Any suitable means may be provided for adjusting the outer housing member 22 Arelatively to the nozzleportion I1 .from the exterior of the mixing device, and I preferably provide a handle portion 20 which may be made of wire or similar material and the end 39 of which extends through the space between the bell-shaped part I2of the ,mixing device and theadjustable plate I5. The

inner portion of thehandle Il may be in the Any other means for limiting the relative movement ofthe hous-` tion extending substantially parallel to said end housing member 22 so that the handle will Aextend voutwardly inthe desired relation to the.

housing member. By providing a frictional engagement of this kind, damage to the valve by the use of excessive force on the handle 3l is avoided, since such excessive force would result in a sliding of the looped portion of the handle in the groove 4l.l Other means for proalways of approximately circular cross section to conform with the cross section of themixing tube and to impinge against the inner walllof the mixing tube at the desired acute angle and the valve, furthermore, is of such construction that the housing is provided with no opening in the side thereof for adjustment of the diaphragm. Consequently, the primary air flowing to the mixing device as indicated by the arrows in Fig. 1 will not `become mixed with gas discharged through such opening in the housing. The `valve further has the advantage that it is of simple and sturdy construction and is thoroughly reliable'in operation. The fact that the 4handle is frictionally held on the adjustablehousingl member is desirable in that the position of the handlewith reference to the mixing device can be regulated as may be desired. The diaphragm can be very easily adjusted by simplymoving the end 39 of the handle in either direction until the desired mixture is obtained and no tools of any kind are necessary to effect this adjustment. Furthermore, this adjustment can be made with a high degree of accuracyl sincel the louter end of the handle moves through a considerable distance to cover the full range of adjustment of the diaphragm. Consequently, a burner provided with a gas valve of this type can be readily adjusted for use with-a variety of different fuels because of the wide range of adjustment of the valve.

"I claim as my invention:

1. An air and gas mixing device for gas burners, including a mixing tube having an enlarged air receiving end and a portion of smaller cross sectional area' adjacent thereto, a gas discharge passage spaced from said mixing tube forconducting gas to said mixing device, a plate adjustable toward and from said air receiving end to control the amount of air entering the mixing tube, a gas control orice arranged on the'discharge end of said gas passage, and means for adjusting said orifice to control the discharge of gas to said mixing tube, said adjusting means including `a part extending outwardly into the space between the 'edge portions of said air receiving end andsaidplate and frictionally connected with said adjusting means.

2. A' gas valve including a housing part having a passageior gas extending lengthwise therethrough, a shell of ciin-slviapedv form/mounted on one end ofsaid housing and having a porof said housing part and having an aperture in alinement with said gas passage, and having an integral continuous annular ilange engaging a peripheral portion of'sald housing part adjacent.

to said end and rotatably adjustable relatively to saidhousing part, said end of said housing part being provided with a plurality of grooves extending from said passage to the periphery of said,

housing part and'having their ends closed by said flange of said shell, said portion of said shell which extends parallel to said end being provided with a plurality of depressions arranged-.about said aperture therein, means for holding said shell against endwise movement relatively to said in the space between ysaid housing part and said parallel part of said shell and each having a projection on one ,face thereof entering 'into a 4groove of said housing part and a projection on the other face thereof entering into a depression in said shell, whereby rotary adjustment of said shell about said housing part adjusts said leaves toward and from the axis of said passage to control the ow of gas therethrough. i

3. A gas valve including a housing parthavlng a passage for gas extending lengthwise therethrough, a shell of cup-shaped form mounted on one end of said housing part and having a portion extending substantially parallel tovsaid end of said housing partv and having an aperture in alinement with said gas passage, and having an integral continuous annular iiange engaging a peripheral portion of said housing part adjacent to said end and rotatably adjustable relatively to said housing part, an integral flange projecting outwardly from said end of said 'housing'l part at the peripheral portions thereof in a direction parallel to the axis of said gas passage and to said flange of said shell. said end ofsaid housing part being provided with a plurality of grooves which extend from said passage through said ange of said housing part and terminate at a peripheral portion of said housing part and having their ends closed by said flange v'of said shell, said por'- tion of said shell which extends parallel to said vend being provided with a plurality of depressions arranged about the aperture therein, said ange holding said shell in spaced relation to said end-of said housing, means on said housing cooperating with said flange of said cap for holding said shell against movement outwardly beyond the end of said housing, a plurality of leaves arranged in the space between said shell and said housing part 16 housing part, and a plurality of leaves arranged

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