US1010066A

US1010066A - Carbureter.

Info

Publication number: US1010066A
Application number: US58714510A
Authority: US
Inventors: Edward C Newcomb
Original assignee: NEW COMB CARBURETER CO
Current assignee: NEW COMB CARBURETER CO
Priority date: 1910-10-15
Filing date: 1910-10-15
Publication date: 1911-11-28
Anticipated expiration: 1928-11-28

Description

E. C. NEWCOMB.

GARBURETER. y u APPLIGATION FILED 00T. 1h. 1910,

Patented Nov. 28, 1911.

3 SHEETS-SHEET 2.

29 L i ne a Je o I a /ZWM @Houma p f E. C.: NEWGOMB,

GAEBURBTER. Arruon'lon unan 001.111.1010.

rimmed Nov. s, 1911.

3 SHEETS-SHEET 3.

ffy-4L lli x'nwino -o.

Nrwooul. o'r'non'rneorrcnrn xnesncnosnrrn estenos rro New colpi onnnonnrnn co.. n oonronn'rron or New Yonx.

cnnnnnn'rnn.

Specification c! Letten intent.

Patented Nov. 28, 191 1.

Appltontlon und October 15,1910. Berici llo. 581,145.

'l'o cli whom it may concern' v Ble it. known that. 1,"Enwltno C. Nnwcotb, u citizen of the UnitedStates, und e lesidcnt of North Scituate, Plymouth county, Commonwealth 4of Massachusetts, have invented ccrtainvncw and uscfullmirovemente in Cnrburetcrn, ot which the ollowin ie u specification. Iy` invention relates to carburetor-s vmach us are used for eupplyin n mixture of fuel uudjnir to internal com nation engines.'

One 'object ofthe invention is to provide u oarbuxeterwhich will 'operate automaticully \\to muintoin substantially predatorminuti proportioned fuel und mr in tho mixture throughout n wide rngc of varia# tions inthe quuntity ofthe mixture supplied to thelenllgine.

O'therfvo jects of the in'vcnlion nrc to provide' niccrburetcr 'which will operute as. sutedyithout.producing u high vicuunli iu tio mixture uupp y ossa s or l ng mg the supply ot-mixturgto tl'eugineihereby cuubliup; tbc muximumkpoucrof th'o engine to be developed: also to provide e carburetor which will 'automatically und reliable; o crute toeupply'u mixture richer in'fue ,Aw :en the qnnntlt .o the mixture or the lod ou the en inc e low than when the loud le noruml` tte proportion of Ifuel by preference rapidly' decreasing nl tiret then remaining practically uniform und linully drcreusiug eomqluhat no the maximum loud on thop'nine in opprocchedg. also to provide a. cnr,- mrct'er which is not eubstnutinlly affected' by variations ci the tem crnture ot the, fluids; also to provide tor t e lendy und nceurute adjustment of tho proportions o'f-air und fuel nnd'to Provide fotiuch ldjustmeut without disturb ng the predetermined relations of auch proportions to variatione of loud; und also to provide tor .thorough vnporization of l liquid fuel, auch as gasolene, m the nir. These und other objects of the invention will `be"in 'parbobvlous undV in part more [oliv explnincd m the following description.

ie invention eistrin the combinations of parte, and .improvements hcrein'dllclosed. I Y .t

Inl .the drewi'ngs,- which 'ne' referred to novel perte," c

hereinfnndforme, lrthereot.iei etinted one embodiment oltluflhventlcn her with u modification thereof, the sume 5erving in connection with the description to ex lnin the principles of the .invenhon` f the drawings: Figure] is u vertical central section of one embodiment of the in vention; Fi 2 is o horizontal section on the line A ofFig. 1; Fig. 3 is n vcrticul section of a modification; und Fig. 4 is o horizontal section on thelinc G-D of Fig. A Tilo mnintennnce of substantially laredo terminati roportipns of nir und fuel in the. mixture txroughout u wide ronge of vurlutions in quantity requireeextremely neen rntc control of the su plies of the luids und especially' Of a liquitflul Such ne gusolcne because of its extremely small bulk' ns compared with th'nt of the air, the relation being aproximntely as one to nine thousand. rent -ucruracy of control of the fluid supplies in uttnined in accordance with the pres ent invention by' taking into consiclcratiou not only the relative orcos of the orifices or ports by which the fluids ure controlled und the heads or di orcnoes of pre ure ut tho omposite aides ifthe orte, b t also the s epeaund dime sions o the ports with rospoot 'lo the effects of `shell shapes and dimenslonu :t on the stream lines und viscositics, one or oth, of the fluids.

of tho fluids uro controlled, throughout u mrt ut leunt of the run e of tht-ir\'urinlions, -itv vnryin the nens oi( the .fludontrollin'g '3011s, wit i or without vnrvmg the heads or ifferonces of .pressure nt hc opposite sides ofthe orte. und since tor mechanical ren- Anous it ts not prneticuble to do this without varying the shnfoe .of the ports the proportions or thenctuul nrt-.ns of the ports are so Adetermined ns to compensate -or thc cii'ect of the shapes of the porte u on the flows or -streum lines of the fluids, hereby providing therequired eectivo eren or areas c nivalle to those ot' ideal formcontrolling uids hav ng id enl quelitice'and of auch propo:`- tions an tofprovide the required quality and qunntity o mixture.

Referring non to the embodimentof the invention.. llustrated in,the drawn? the ,gorie by -which the fluids are control e are oused within e casing 1 having at its top ltr-outlet for the mixture m the :form of a neck-,9 .udlptecito be connected to In carrying out the invention tho nuppi'nn` the emp',l e. Preferabl this outlet is conlrolled ythlfottle; ve trated rompi-'inlog' unlink umetncelly aecuredygto db-which .projects through o l "e nochi "at oneelde and'- yprovided with' nibble loperatuil ann notahown). lft-"The eeamg- 1 is'opeuah teil er end an .eine auf 'u member T is member xalllpp openat l0 italopgr end nd i provlded iiltits eide f Wallnffw'itbm m'ulti lio ty ofnarrow elongated' air porte 7.' 'lpheee ports are normally cloned by.;A relatively movablepiston valve 8V fitted to the interior of the air port meinher shown, the air port memberis fixed and the 'iston is arranged to slide -v'erticail Vtherein ao as too the air ports more or les! in accordance v rith tliequantlty of air supplied to the engine. By making the air-porte 7 narrow andlelongated the stream linee of the air flowing through them `will have substantially the seme effect upon the lion' o! the air irrespective of. the length oil-the porte *bieb are brought into operation by the opening movement of the valve 8. That is to any, after-the valve is elevated a distance equal to C that'. the maximum vn tb of port is sie daeedrthe stream lineeect upon the ow will be substantially the saine as when .the valve ie moved to open theoporty throughout their lengths. By. reason this, except for the very beginning ofthe o .enin movement,

of the air ports the quan itgeo air which wia new enough ammy ma directly pmportional to the extent of'movement of the valve, other conditions being :ual andthe total eective port o erung pr uoed by the relativo movement etween the valve and air port member will be substantially pro- .At the beginning ofthevopening'movem rit the suppl -il sti-an led aontevvli'at, but t iis ie dee rah e in the it.tend s to"- mixture t n the present embodiment the valve B 1s automatically lifted b the pressure of the air entering throught e lower oponeudof the air rtjnem i I within e casing interlaced by the suction of the' ouwe an the opening of the throttle valve 8. .here the elosin of thefair porta bythe valve iledectedby e Vravity of the 5i. letter, as inthe embodiment i ustrated, the d ree of vacuum required to lift the valve rail depend upon the area and the weight tberep .,gnd will remain substantially conhtant t oughout the entire range of movement of the valve which may or may not orreapond to -tlial Ventire 'range of variations in the tupply. ofmixtnre to the angine. as limeinefter explained.

In order properl 'to control tha move- (lb' mem.: 'ofthe valve and prevent undue vibra 8d thelvalve illuad :'a tubular supplied theviidth of the ports sov portional tothe extento the movement.-

,terminates in a conica reduce` a, richer in fuel when amai in quan-4 when the pressure" tion' thereof, aeb the more or less inter- .mittent suction e ect of the ordinary engine, .and flor othorreasona' hereinafter exlained,' the valve in provided with an upardly extending closed tubular :portion 9 which'ie tted to the interior of the air port member 6, while the top ofthe latter mem- ',ber is closed exce t'for a smalll aeaage 10 and a ort norma y closed by'a c eek valve ll. is construction provides` a dashpnt which, while permitting a reduction of presaiii'e to act with eufleient promptness tlirou h the check v lve 1l and permitting tho va ve to close wit sufiicientproinptncss .for practical urposes, prevents auch rapid movement of he valve in either direction aa would be apt to cause unpleasant noise or nury.

n the ei'abodiment` illustrated, the fuel is through a pipe 12 and is admitted to e. rede tacle 13 through u valve 14 which is conti-o led by a float l5 so as to maintain the fluid in the receptacle 13 at a substantially predetermined level. Aa aliown, the valve hl ia'xed on a stem l10 pasein loosely throu h the tloat 15 andhavxng a xed collar 1 against which the float abats tol'it and close tlievalve. The stem 1G ia guided st ita upper 'end'in a suitable apertura in the cover 18 of the reoeptacle 1B and near y its loafer end nhrlaml ,For the purpose of manually -depressing the float to rovide an extra supplyof gaanlene when eeired, a push button Q0 is provided, the same being xed upon a stem 2l which is fitted in the bore of a plug 22 seoured in the cover 18, .the button and stein being maintained in an elevated position by a spring 23 housed in a large boi-ein the upper und of the plu 22; The stern 21 I houd Q4 forinin f u valve which ia normally sented in the en of the 'plug by the action of tho spring 23 ao thit'the receptacle 13 will be normally sealed al this point.

From the receptacle 18 ithe gasolene liowa through u passage to thecaaing l. Aaahown, the lmao niem- 26 Ila provided with a circular'tlange 27,

hymn aperture in a diabar which is seoured to the caaingr l by means: of screws (not shown). the utter serving also to clamp the air port member (l iii posh ,tion u'itliin the casing l, as by means of a Hanne 'at the lower end of. said member which is seated in an annular recess or rabbet in the tiange 27.

For the purpose. of distributing the fuel in the air and at the same timo avoiding any direct aanirating effect of the cum-ents of air upon the supply of the fuel, the latter is conveyed upward through the valve 8 and delivered into' the enlarged chamber formed by the tubular portion il of tha valve` this chamber being closed at thetnp' 'lll 25 in'a base member 26 l :iti

uri hy ii diaphragm or cover which is --of fuel, the upper: end' ot' the member :l1

is provided with i1 port 32, llio etl'eotive openn of which inieontrolleil und ruried hy u re utivoly nmruhle tuperiog needle 32S. .in shown, tlie fuel port member .'tl is :flutiener)I und the needle is eurried by und moves in unison willi llnI volvo it. l

lt will be soon llmt'` einer the, ell'eiftivc uren of the nir inlet ports 7 vuries directly with the degree of movement of the vulve 8. the effective urea of the opening through tho port. 32, un rontrulleil by the needle. lill, should rnry in u predetermined relution to Ille urz-vement of the needle in order tlnit the .supply of the fuel muy be varied in the desired relation to the supply el' nir, inisumin that. the hoods undcr'wliioh the two nids flow through their rtspertive iorts lnnr o conxtiint i'elution t'o'riirh other. l'lie i'il'eetiro nreiiot" the fuel port-us routrolleil by the needle. however, will nrt correspond to the iicftmil nrexi..thereol heruuo of the viscosity of the nel.

-It' is loiown tluit the returding ell'eet of, viscosity upon the rute of flow of n tiod through n smull opening in greet. 'Infthe rime et' n enpilliny tube. for institute, the retuuding e'eet of viscosity vio-ies inversely ns the fourth power of the radins und direetly iis the len th-of the bore of the tube.

'l'lie width of llie annulant opening. formed between the needle #lll und port :l2 is .siiuill, its eupillu'ry elnirueter heilig inout peoimoneed und moet rapidly viired with reunion to the movement of the nee'dle, neer the beginning of the opening movement ol the needle. It followx. therefore, tlmt the riseosity of the fluid tends to 4choke this mirroir iinuuhir opi-.ning to n degree which varies with the degree of opening, Ho tlnit the i-tleetire opening or ort uren will neither eipiul nor rnr'i` in tio suine degree with the uotinil uren. ,.Eien il' the. etl'orv liriund io'tmil :ira-:is wen' rqunl or luid u delnte determinante relation, it would he llilleoli io pli-e the needle sui-h u form ilmt, the uren of the furl port opening wou Il herir euch-,wlutien to the uren of the iir port openlul; un iifnnlgizqirhduemwit i xullirient neiuriwy the qi'ii'ltn-fof ittrtttirl rei uiied.. I

o iiccordnnmwith one feiitine of thin lnveniion, it is proposed to tolte udviiotlge of llimellfeigtn 1d: viscosity und provide l. culo' trtitimi which may be prmlueed mit duplicated with the required necurncy and readily adjusted t0 give the desired quality of mixture. This is iuuiomplinhed un followe: The needle is given u uniform taper from this bnse of the effective portion towurd the point und preferably throughoutite length, this hein f n form which con be priu'tieitlly produrei und reproduoeil with greet nenni-eey; 'lhe loper is Huch tluit, if eontinuod to n point, the portion extending below the port when the parts ure in their low-ent xoh'ition io longer, preferably uliout one-tifi i, thun the totul length ot' the opening movement. The ellei'tivi portion o1' the needle muy, of ronnie, he not subsliinliully longer thun the length of the needle inmenient. With. this forni ot' needle the iietlml uren of the port. opening will inirreuse more rupidly with relulion to the needle. niorenicnt, thun the toliil ureu of the :iir ports ilierenses with relation to the vulve movement during the lirst [mrt of the movement of the needle und vulve und more slowly during the luther pnrt of surh nuwement.

The viscosity of the fuel1 will render the effective area of the fuel ort opening lees go then the actual urea und tlis choking effect will be greater during the tit-st port of the needle uu'wement no mi to tend to oom iensiile for the forni of'tlie needle. 'llie e letzt of viscosity however, will vary with the size of the needle and iort. lf, for illustrution. the diameter of t e needle buse und port ha too greet, the choking eeet of visuosty during the first pm't of thel opening move nient will be excessive und the mixture will 100 be loo weak. If, on the other hund the diiuneter is too smidl or the length oi the port too grent,.eithr the viscosity eti'ect. will be inndequ'nte or it will' be sustained throughonttoo gieut un extent of the. open 105 ing movementto effectively componente for the needle form or the port in'eu'will he so sinull nu to requiieun extensive heud on the. fuel to fore-c. u. suliicent. qimntity ot it through the 'pui-t. to produce the required 110 mixture. ,The diameter of the needle bene und the diameter und uxinl length of the. fuel port, therefore, ure so determined thnt the tnper form nf the needle und the risoosity ell'oet.l of the fuel mutually cniupen- 11b suite for eheh other so os to provide im effective fuel port opening having the proper relution to the nir port opening to produee Ilie'requred muilityof mixture for ell loads ou the. entrino l-hnve touml thnhwith guso- 12o leoe im n foe `und with-ii needle lowing u uniform taper. the diameter ot the needle Wlu'hee nud port should not exceed n maximum oubout Heren one hundredths oi" o in inmum of about four on'e hundredthemf on 125 inch. Most 4siit'wfiietory results h'ave beenl nttuined with 'n needle' about'six one hun- 'hing et he -dredths tn hsfbnseidinmeteigftha port lt) dili'neter 19d its short-iin the exinl direc ion as is iai-noticable to mah ne it. Aeehown, this port rin is flared et ite under eide toreduce the e the ort to the minimum. l

|Smee'the total o ning movement of the air valve and need e is of considerable extent to ail'ord air ports of great length relative to their width, the taper of the needle is of a H'mallan le; but this ie favorable as by, reason therco the linee of lluidtlow through the port will notl be materially changed throughout the openiu .movemenh ae would be the case if the n ced e taper was of a relatively great angle.

Provision is made, in accordance with one feature of the invention, for accurately cen tering the 'needle with relation to the port so that the width of the annular port openin will be uniform. This is important in or er that the viscosityeifcct may rect and to prevent contact between the needle and the port such as might cause wear und change of form or size of the needle und port, or interfere with the free movenlentpf the needle and valve.

fn order that the needle may bo accurately centered with relation to the port, in the em hodiment shown, it is fixed in a holder 34 provided at its lower end with a head, and

aving a stem which passes through an o ening in the diaphra in or cover 80, w ich opening is sligitly ar er than the stem of the holder so that the utter is capable of a slight lateral movement in all directions with relation to the cover. The holder is frictionally held upon the cover between the he d o'f tli'e holder and a flexible washer 85 an nut B6 so that the holder will remain in what ever position it maybe moved into with relation to the cover. 'The needle is so positioned with relation to the holder that when the latter recta upon the u per end ofthe lube 8l or the ring in whic the port 82 is formed; the needle will iust till or close the port 82. 1f, then, the valve 8 be lowered untilthe bend of-the holder 84 comes into contact with the tube 81, the needle will po leition the holder with relation to the cover 30, so that the needle will be exactly concentric with the port 82.

In accordance with one feature of the invention meansmre rovided for udjuating the needle with rela -ion to the ort so that the latter may be given an initie openin when the air valve is closed. This initi opening or lead 01" the needle with re la tion to the air valve gives a mixttu'e which active length of is richer in fueLbut since the'proportion of the extra opening d ue to this-lead of the needle relative to the total o ening is much greater at the be innin of he'o enin movement and rapt y dim nlshes un lit negligible, the de rec of richness is substantial only near t e early part of the opening move ment. Bv verging the lead of the needle, the initial mix ure may be made as rich ne valve 8 and the will necessary totrget the best resulte without substantially e ecting the quality of the mixture for intermediate or heav loads. The riehentn eilect of the neede lead at or near the e inning of the opening movement ia modified y 'the viscosity eect of the fuel, thereby affording a greater latitude in the range of the lea adjustment.

For the purpose of adjusting tho needle in the embodiment chown with relation to the. pori 32 80 as to provide the desired initial opening between the needle and the port, n ring 37 is screwed into the lower end of the tubular member the upper edge of this ring'being adapted to form a seat for the valve 8. By screwing this rin 87 more orJlees into the member U, the va ve B muy he lifted, and with it the needle 33 may be lifted to give the desired initial opening of the fuel port. The ring 37 is retained in ite adjusted position by a detent which, es shown, lle in the form of n spring ressed pin 38, which is suitably guided in tie buse portion 2G, being normally pressed by a spring 40`n'gainst the ring 37 so ne to engage suitable recesscsli) formed therein.

Aecordin to one Vfatture oft-his invention, the fuel is tliorou hly distributed iu the air without a direct iisplrutingz effect of `the nir currents upon the uel such as would affect the supply thereof. Tofthieend the fuel ie delivered, in the-embodiment ehowmthrouvfh the port 32 into the chamber forme-tl by t ie valve 8, with its tubular portion 0 und cover BD and from this chamber the fuel is passed in minute streams through a series of ports 41 formed et the base of theitubular portion `9. These ports 41 correspond in number to .and deliver the Vfuel streams into the nir ports-7 eo Fthat each ofthe multi licity of air currents formed by the orte receives its proper` prgsqrtion of fue flhe ortefll are mainte n in elinement with e ports 7 by l. in 42 which, for convenience, is inserted in one o! the ,porte41 and prolecte into one of the porte?. 'I o ind in thcuni ori tiiislrillalutionharlid continllous deli'ery ir; thi;` ue t 'roug t e ports ,a ema sup' veo nir to the chamber in preferably proiitled for, as by a sli ht clearance between the' el port membenl. The slight current of air thus admitted' to` the chamber :will not exert a ldirect aspirating effect at the port 82 and yetwill prevent any fuel. from accumulating 1n the chamber. The air willenteair'ii the fuel and ca it to am with substantial uniformity t rough heportsil.

It will be eeen that'whatever reduction ot pressure or partial vacuum exists in. the can 1 at the'delivery side of the porte 7 tranemit-tedxthrough the porte 41 to the chamber and `to the delivery eide of. the fuel port Atmospheric pressure will, of eouree,exmt et the inlet aide of the air tions between the heads being maintained by reason of the described connections between the Vinterior of the casing l and the upper Soi-tion of the receptacle fBTrclVl'ien it is esired, however, to provide n `cnrbureter having o. capacity greater than oneV having a fuel inlet port of' the dimensions above set forth and without having n greater reduction in pressure than that uoreaeui to lift the'inlct-valve this may be aecomp iehed in accordance with one feature of the invention by roviding a plurality of fuel inlet orte, eac control eti y a separate needle, t ie nir inletports being correspondingly increased. One embodimcntof this feature of the inventionis illustrated in Figs.- and 6. Accordin to this construction, a casing 1 is provide the eine being eo enlarged as to receive two or mei'e of the air port members 6 with their* air inlet porte T, valves 8, und connected

arte

9, 30, 33, etc.',lthe casing preferably avin s sin le flanged discharge assage 2' an thrott c valve 3*, aa nhown. n this case a single float chamber with its cover 18, iloat o erating button 20, needle valve 47 and ot er parte may be employed, the same being connected by a dupleir base mom. ber 26* to the two supply tubes nl having their fuel vinlet rte 82coperating with the needles 38, as c ear indicated in these fi ures.- 1n` this case t e,tube 4B by which tile partial vacuum in the using 1 is transmitted to the upper portion of the fuel receptacle 13 ma belocated'between the two members 6, as s own. In this construction the valves `8 may be slightly varied in weight ao that eration after the other one will come into op by a 'slight' increase in the vacuum, thereby incur-in a more certain control of the sup plica o hiel and air, -when the engine is l glit load. While two sets of ling -valves are shown, it is be added, if it is de rhc capacity of the sup iy-eontrol obv ons that more may aired further to increase Itjalto nndcrstood that to ita precise constructions herein act forth, as

many changea mty be, madatharein without rom e de artin main principles of the inilientioiii and without sacrificing ita chief advantggea. A

I claim:

1. A carburetor ccrnprialnga member havin a multiplicit of air supply porta, a valve for contro ling' said air porta, said parte havingt a relative movement, the total clejctiva or opening prod by any,siicli movemcn being anbstantia ly proportional tothe movement, a member. having a .fuel supply port, a needlo'for controlling said fue port, cennectiona -ior producing a relstiva movement between the fuel aprt meinber andthe needle proportional the relstiva movement between the air port mainni. invention "fitbroailer aspects is not 'united to the ber and valve, and means for maintaining under the normal conditions of 'operation a substantially 1 fixed relation between the heads acting to force the fluide through their respective ports.

2. A curbureter comprising a member having a multiplicity of narrow elongatedy air supply ports, a valve for controlling said air porte, Huid parte having u relative movement, a membenhuving u fuel supply port` n needle for controlling said fuel port, connectione for roducing a relative movement between the nel portmember and the needle proportional to the relative movement be 'tween said air .port. member and valve, and

means for maintaining under the normal conditions of yoperation n substantially fixed relation between tlie'heads acting to force tlxe'lluida through tlieirrespeclive porte.

3. Aonrliureter comprlsinge member hav ing n multiplicity of narrow elongated air supply ports, n valve for controlling said air porta, said parte having a relative movement, a member havin a circular fuel sur ply ort not enter tuin about seven 'one un redths o` an inchin diameter, a'noedle for controlling said fuel port, connections for producing a relative movement between the iel port member und 'the needle propere tional to the ei'fttlve movement between eaid air port mem 'r and valve, said needle haviup,r an approkimately uniform taper," and meunefor maintaining under-the normal conditions of operation-a substantially xed relation betweenv the heads acting to force the lluids through their respectiveports.

4. A caibiihter oomtprising a member havin n niultiplieitvl o air su ply porta, a va ve for controlling said ar ports, said parte having a relutive'novexnent, the total eilective port opening produced byiiny such movement being substantially proportional to tlie movement, a member having a" fue] eupily port, a needle for 'controlling said flic port, 4connectiona for producing a relative movement between the fuel ort member' and the needle proportional the re1 between the air port member und vulve,` means fongdjuating thatparts whereby the o ning "ofthe fuel port may be girona lea with respectito th'e opening of e air parte, and means for maintaining under the normaliconditions of operation a substantially lixed relation between-1 the atlve movement heads acting to force the fluids. Qiroiigh the r rea tive ponts.

`,ltcarbiireter com rising aineiriher` hat in 'a multiplicity. air supply porte. a va ve for cantrollin said air parte, said paris having-a relat vcl movement, the' total efectiva port opening-p uced by any auch movement being substantially propcrtmm. to the movement, a nic r havin a Puel sup ly port, a.ncedlc -for controlling said fue port, connections for producing a relllt) lllli tivo movement between the fuel port inemliegendI the needle proportional to the relativ'e'movmentbetwoen 4iniideiriport mem ber ln'd juive, ineens for centering the needle vrith.,re1ation tio' ita portfand means for maintaining under the -nernial conditions of.

.opration l. substantially tixtd relation bctween thellieadai nctingto force the fluida tliltxougii:theirrespectivepettocarburetor compro-ling a member hav-l' -ing a multiplicity of narrow elongated air supply pertain valve for cont-rolling said nir port,eaid parta having n relative movement, o member having aifiiel supplyport, a needlefor controlling-said fuel poit, connections for' reducing a relativo movement between the uelfport nieinbor and the needle proportional to the relative movement betwcensaid nir mrt member and valve` menne for centering tie needlowith relation to its poit,ni cann for adjusting the parts whereby the openingof the fuel port muy lie given a lend with respect to the opening` of the nii' ports, and means for nuiiutaining under the normal conditions of operation a substantially fixed relation between the heads acting to force the luids through`v their respective l ports. i l

iii)4 7.A cnrburnetercom rising a member having n multiplicity o narrow elongated nir supply porte, n valve for controlling said nir porta, said ment` a muni nupply port. not

onednuulmdtha o Tris liu-ving n i'l:itivo |iio\'e niet' than about 'nevenan inch in diameter, a

needle for controlling s aicl fuel, port, conmainte ning under the neetlonu forroducing relative movement belive-en the fiiol port member.. andthe needle proportional to the relative' movement between said nir port memberandfvalveI 'said needle having nn approximately uniform4 taper, melma for centering .the needle with ro ation to its port, moana for adjustingthe l parte whereby the opcninitzl of the fuel port given a load wi respect to the of the air ports, and means for normal conditions of operation. a substantially tixed relation botween` the hondailcting tu force the fluids tlirouh their. respectivo parte.

may be opeuin -membor loving o multiplicity ef narrow olon t .trol in said porto, one-ot nai -bonuo'ctcdto the movable #ftlul .fuel-effort' in advance otthe open n air supply portera the lr-porte; and a dnli pot toiretaining the nirgtacling movement ot the movable parir: 1.

.19. A ca nnctor Acom rialir a tubular mcuilierh'ovingl--o .Inuit plicit of narrow having a' nircular'fuel.

' carburetor comprising n tubular for controllin said orte, a member having n'eircular fuciisu ip y port not greater than about neven une-iunllr'cdtlis nel' lese. thun about four one-hundredths of an inch in diameter, n needlefor controlling said fuel port, said needle bein connected to lsaid valve und having n su stantially uniform taper extending from its base noi'tionytoward its point, and means' for adjusting the parts whereby the opening of the fuel port may bo given a lead with respect to the open ini of the air ports.

0. A carburetor comprising a member having u. multiplicity of -narrow elongated air supply ports, ii vulve for controlling said ports, one part being movable with respect to the other, u member having a fuel siippli` port, a needle for controlling .Suid fuel port. Siid needle heini,r connected to the inovobli` purl. and nieuns for distributingY the iiu'l unil delivering il to the various air cori-col lou'ingihrringli the nir Supply ports.

Il. A enrlmretcr comprising,r a tubular iiicinlier having :i multiplicity of narrow elongated nii' Supply ports, u hollow pieton valve titled lo .au-iid member und arranged to normally close uid nii' porti,- by its gravity. n tubular member having n fuel supply port within said valve, a needle carried by said valve for controlling said fuel port, said vulve hn ving u multiplicity of fuel delivery porta lending from the interior thereof to Suid nir ports, a flush pot. for rctnrding the closi f' movement of said vulve, and means for ai' )listing the parts whereby the openiupr ol thu fuei port 4may be iven n lead with reepect to the openings o the nir ports` l2. carburetor comprising a tubulor member having meiosccl end with a check vulve ,openingoutward, and a multiplicity of narrow elongtntod nir snpp1y ports near thc otlieuuchii iollo\v.|-naton,valve fitted to aaid member and arranged to normally close mld air porta liv its graritv, u tubular mom# -poi'ts lending from the interior thereof to said nir porta; I z i lil. carburetor comprising` i tubular member having ii,cloi-ied und with a check faire openingr outward and a multiplicity 'et'V .nnrrowelougatcd air supply "ports neer the other end, a hollow piston valve fitted to Huid nuinbcr and arranged to-norn1ally close said, air porte bv its gravit a tubular member'lli'nvmg within anida/o ve a circular fuel up lv port not more than sevenonehundrei the of an inch in diameter a needle enrried by unid valve for controlling said fuel mrt, mid needle having a oubetantially imioi-m taper cxtcndin' from it hase portion toward. ts pointant opening the I uel port in advance of the opening o the airports,

. ihereo to uuid air and needle pro and said val've having. a multiplicity of fuel deliver ports leading from .the interior 145. A carburetor comprising a havin a multi licity of air supply valve orcontrolingysaid airportmeaid arts having a re ative movement, the tota effective port o ucedtby any auch member porte, a

in prod movement being au etantially proportional to the movement, a member hav' a fuel Hup b1 pori, ln needle for contr fue port, connections for producing a relative movement between the fuel rt member rtional to the re ative movement betweent e air ort member and valve, means for maintaining under thefnormal conditions of operation a substantially fixed relation between the heads acting .to force the fluids through their respective ports, and means for varying said fixed relation.

15. A carbur'et'er comprising a tubular member having a closed end and n multipl'io'ity of narrow elongated air supply ports near the other end, a hollow 'piston valve filled to. said member aud arranged to normull close said nir ports by it gravity, a tubu ar member having a fuel supply port within said valve, a. needle carried by said valve for controllin unid fuel port said valve having a multiplicity of Ifuel dc ivory ports leading` from the ipterior therefifto said air porta, and means for maintaining during the rnormal conditions of operation a substantially fixed; relation between the heads acting to force respective ports, and means for varying fini fixed relation. 16. A carbure-ter comprising ,a 'crisi adapted to be connected to mi internal combustion en 'm2, n throttle valve between said mixing am ,the engine, ameinberliaying a.' putt or ortxl for su pt ving air to said cnsing, o vrdve for; varv ng the area of said' rt or'porte( one f aald )orte being contro led bythe air tluvring tirough anni port'or iria, moana having a port for aupplying ucl to said casing, a peedle for varying t e urea of the fuel port, aid needle being con lrnlleil by ilieiair controlled member, u fuel supply receptacle connected with uuid fuel mrt, means for maintaining' theaupply of unl in said, receptacle at a substantial y nona-tant level, nieana having p restricted paas-age for ing 'a communication between the atmosphere and tlie space-above the fuel in said receptacle Ind menue havin a rextricted pamgo-iorining a commun cation between said cnang and the space above the fuel in said receptacle.

17. A carbureter comprising n casing ade ted to be connected to an internal combua lon en ne, a throttle valve between said can e the engine a member having a ort r porta for supplying alr to said caeng,l a valve for' vaiving the area of said 4one of said air port members, eac

the lluiila through theiil,

port dr ports, one of said parts bein contrlled by the air flowing through sai port or porta, means having a ort for supplying fuel to-said casing, u nega le for .var-ying the area of the fuel port, said needle being controlled by said air controlled part, a fuel y:supply receptacle connected with said fuel A means for maintaining the'supply of uel in said receptacle 'at a substantially constant level, means having a restricted aaageforming' a communication' between the atmosphere and the s` ac'e above the fuel in said receptacle, m'ann passage forming a communication between said casing and thee-pace above the fuel in said receptacle, and means for varying the size of one ofF said restricted pasnages.

18. A carbureter comprising a single caw ing .adapted to bevconnccted to an internal combustion engine, a sin lc throttle valve between said caningand t e engine, a pluralt of members each having e multiplicit of air supply orte, a lurality'of indepen ent valves eac contro ling the air orte in valve rt member having a relative movement t e total effective port opening produced by anylsuch movement being substantially pro ortional to the movement1 means having or ,each 'of said air port nicmbera n circular'fuol suppl port not greater than labout seven one-hun redths of an inch in diaineten a plurality of independent and its air ueedlea cach 'controlling one of said fuel ports, connections for producing, a relative movement between each needle and its fuel ort proportional to the relative movement ieltween the correpondng'air port member and itsl valve, an means for maintaining .under the normal conditions of operation a substantially fixed relation between -the heads actin toforcc the fluida through their respective porta.

'10. A carburetor comprising a single casing adapted to bc connected to anqinternal combustion engine, a sin ley throttle valve between uuid casing and t e engine, a plurnlity of members each havin a. multiplicity of narrow elongated air supp y ports, a lurulityof independent valves each'control ing the nii' orte in oneof said air port mcm bers, enc valvennd lts air port mefnber having a relative movement, means having for each of miidJnr port members a circular fuel supply port notgieater 'than about seven one-hundredths of an inch in diameter, a plurality of inde ndent needles each controlling one ofi-uid 'fuel ports, connections for producing. n relative movement between each needle and its fuel port proportional to the relative movement between the correpending air port member and ita valve each needle havin a nubatantjally uniform taper extendl rom ita baue portion to ward its point, ndependcnt adjusting menne ving a restricted 1:10011". fur maintaining um cumhlmml nf 01m-nlm n imlmlnntinlly umwnulzvhy the u vulling n( Ilm fuel ports muy lm gwen vmgia le lends willi Impact. tn tlm npcning uf tho corrcspmldn nir ports, unl or tlm nul'nml mmlmstmn eigimr, u Hngll, lliiulllv vulvu lr0- (wwn :mill mmm" mul llw vngixw. n plurulit.r nlllibulur metil mw' mwlx lnwilng n :nullipliuity uf lnurmv eluugnh l nir supply ports, n lurnlty of imlcppn vnl piston vulves vncx zlgnlrulllng thc purlsjn nu uf Huil] uil' lmrt members, u plumljly nf mumlmm wu'll inving n hwlmlppl purl fmune uf ymiel nir port mcmlners, n lm'nlly uf lmllpmnlvnl (nlm-ing ucmllvs mwln nhnlrullilig um uf will fmel pmbi, auch nuelllv being uugnwvhul ln "nu uf #will vulve.; uml ummm iur nmjntnir ing under lllu'nnrmul znnxlil'iunx uf npvrxv lion u .mllmlmlliully llxiil wlnlimi liulwwn thc'hcndn nclixlg tu fmlu tlm fluids l-lwungrh their respective ports.

21. A. carburctcr comprising! n .Qinglv mscunuccted tu nxliuternul l ing mlnpted tu llo throttle vnlve lwu sulmlribln' witncxsvs. E YARD (l. NFVUMU. l Wil lwsse-s: l l Fmxms Kxmmwn,

| R. n. Mumw.

a; plurality uffmum- :1