US895709A - Carbureter for hydrocarbon-engines. - Google Patents

Description

No. 895,709. PATENTED AUG. 11, 1908. E: P: 4%: G; E. ABERNETHY:

DROOARBON ENGINES.

APPLIQATlON FILED JAN. 19, 1904.

GARBURETER FOR HY 2 SHEBTSSHEET l.

wi/imeooeo PATBNTED AUG. 11, 1908. E. F. & G. H. ABERNETHY. GARBURETER FOR HYDROCARBON ENGINES. APPLICATION FILED JAN 19, 1904.

2 SHEETS-SHEET 2.

.. .no'rsemoe. I. J A-ppumflw med ua 9, 1,994. SerialNo. 189,67-1- To cllwltcmdt may concern:

. EDWIN. ABERNETHY AND GEORGE H; ABEnNnrnY, or NEWYORK, N/Y;

caanunn'rna ron nrnnocaitnon-nncmns.

'Be it known that we,"EDwrn FQABER- ETHY andGnoRcn H. ABERNETHY, citizens.

I injC-arbureters forHydrocarbohwhich the following is a specification. i carburetors of that class inten of the-United States, and'residents of the city of New York,'.borough of Brookl n, in the county of Kings. and State of New ork, haveinvented a new and useful Im rovement ngines, Of.

Ourinvention relatesv to improvements in ed to be used inconnection with explosive engines, wherei inthe'suction from the en Ire-cylinder operates to draw in a charge alcombustible vapor or mixture, the latterbeing ignited at a properperi'odin the operation of the engine y a sultable sparker-; or i niter,-in order to explode the combustible cliarge and roducea gas, the energy of which is utilize for ,drivin the engine'plston. In thisclass of devices ifliculty is experienced insecuringthe admixture of :a proper quantity of the fuel of fuel totheair. 'W'e overcome't with theair', andof regulating the roportion ese objections by ,an, automatically zope'ratingfcontrivance which includesan air valve that is opened by thesuction created by the engine, .a fuel valve controllable by the movementof V .The 'inventiondcontem theair valvean'dadapted tofbe opened-and closedgin' 'unison' therewith, and means for .regulatingthe volume or;.quantity fuel ad mltted'at-ea'ch period in the opening move ment of.the'fuel valvasaid re ulating means a being adjustable lndependentlyqof the operation of the fuel valve" and being accesslble fbradjustmeritmsfhile the carbureter is in service.

lates the employmentof a rocking fuel-vave constituting the axis of movement of a swinging air valve, the

latter being mounted on the fuel-valve and serving as a means for ositively operatin the same. With the fire -valve is associatec an independently adjustable fuel regulating contrivance which, in .one form of construction, is emb odied as a stem adjustable endwise'with respect to the fuel-valve; an end portion of said stem, or a device associated therewith, being accessible to. the operator, for conveniently adjustingl the same. Accordin' to this part of t e invention, the

- fuel-Va ve has a longitudinal bore or passage,

and apluralityof graduated transverse ports.-

- The stem is fitted snugly inthe longitudinal bore so as to reveal; eakage,-and said'stel'n" is t dg t rem ve i Passages pt d vaporize freely and 1 nection wit Patented Aug. 11, 1 908..

the fuel-valve; said stem bein adapted for endwise adjustment within sai fuel-valve in order to regulate the quantity of fuel admittedbyfsaid-valve to the path of air which trav- 'erses the carbureter.

for registration with the transverse ports of The fuel regulating means of our imlproved I carbureter may be adjusted to varyt amount of fuel may be combined with t e air e supply of fuel with such nicety that any re uired to produce a mixture or combustible vapor of any strength. The new device byreason of the nicety of fuel regulation may be used to good advantage in connection with a hydroca'rbon, such, as gasolene, naphtha, or the.

like, or in connection with a gas. We have found that the devices operate successfully 'on a low grade of hydrocarbon, and they also work well in cold weatherwhen, as is well known, a hydrocarbon does not ordinarily uickly, thereby adapting our device to ful%l allthe conditions re quired for ractical service.

,Althoug i. we have described our invention as being espl cially' adapted for use in conunderstood that we do not intend to restrict our invention "to: this particular use, because we are anivare: that' -it may be employed in other-arts and iniotherrelations.

Further'objects and advantages of the in 'vention :will appear in the course of the subwherein corresponding charactersfare used to .indicatedi'lie parts in the several figures.

explosive engines, it will be.

Figure l is a vertical sectional elevation through an automatic .carbureter constructed in accordance with our resent inventionf Fig. 2 is a horizonta sectional plan view of the carbureter shown by Fig. 1, the section being taken through the casing and through the rocking fuel valve, together with means for regulating the effectivearea of the fuel port. )Pig. 3 is a vertical sect onal elevation of another form of construction embodying our invention. Fig. 4 is a detail V view of one form of rocking-plug fuel-valve contemplated bythe invention. Fig. 5 is a detailjview;of.regulating spindle or stem adapted for use in connection with said valve, and shown removed therefrom. Fig.

fi is a detail sectional view through a fuel bureter embodying our invention. a horizontal'section of a carbureter ofthe valve and the regulating stem, illustrating a modified form of construction forimparting' endwise adjustment to the stem.- Fig. 7 1s a vertical section through another form of car- Fig. 8 is general type shown by Figs. 1', 3, and 7,

illustrating a fuel-regulating valve mounted .-independently of the fuel controlling valve.

In carrying our invention into' practice, we

. employ a casmg 5, which may be of any suitable form and dimensions, but as shown by the drawings, the casing is approximately circular in cross section, with a flattened rear side, 6, the latter being chambered, as at 7, and constructed for'the accommodation ofa tapering plug-valve, 8, the latter constituting the fuel-valve of our improved device, as will be hereinafter described. The casing," 5, is provided with a nipple, 9, adapted to serve as an airi1 i let, to wlnch nipple a pipe,10, may

or may not be connected, as preferred; and

said casing is furthermore provided with a nipple, 11, serving as a suction connection for an explosive engine. As shown, this suey tion nipple, 11, has a suction pipe, 12, 4 screwed thereto, said pipe servingias the o erative connection between the chamber '0 the carbureter and the engine cylinder, but such operative connection between the engine and the 'carbureter may be obtained by any way known to those skilled in theart. The upper side of the casing, 5, may be closed by a removable head, 13, which is pro- .35.

vided with a knob, 14, for the application of a wrench or other tool in; removing the head,

' and, said flattened and extended rear side of the casing is shown by Figs; 1 and. 2 as being provided with .aconnection, 15, for afuelpipe, 16, the latter having communication with the air chamber, 17, throughthe plug;

valve, 8.

v In Fig. 1,the fuel pipe 16-is shown as lead- 'ing downwardly from the chambered rear side, 6, of the casing, but this particular lo- 'ea tio n of said pipe 16 isimmaterial, because it may extend horizontally from the rear side of the casing as shown by Fig. 2. l

Within the chaml'ier, 17, 1s arraliged an air valve, 18, which is shown ill tile form of a ilap valve mounted for swinging movement as distinguished from a sliding movement, but it is to be understood that we do not desire to confine ourselves to a special valve of the swinging type, because we may employ any suitable kind of an admlssion valve'adapted to be opened by suction from an engine and the inrush of air when the engine operates .to

create a suction through the carbureterfor the "intake of the combustible mixture or and the'member 20.

vapor thatlcortstitutes' the explosive charge.

Said air valve may beef anysuitable or preferred construction, butz'a's shown it is provided with a suitablefacing,19,.such as a leather washer, with an arm, 19 and a diskmeans for mounting the air valve for movev shaped member, 20]. The arm serves as a I ment on a horizontal axis, and in thezf-orm of construction shown by"I*igs'. 1fand 2, said valve is ada ted to be connected by-the armwith the'fue valve, to make the latter-serve as the axis of movement of the air valve, or

means for controlling the movement" of' the air valve is adapted to also serve as acheck valve in keeping the pressure of the engine from backing up, especially when the car bureter is used in connection with a two cycle ex losive engine, audit also acts as a'check va ve in case of back fire""in. the engine.

The disk or member, 20, of the air valve is clamped with the washer, 19, to the metallic body of the-valve, 18, said washer being interposedbetween the valve-body This member is of less diameter thanthe washer .andfthe valve- Said flange of the valve-member projects into the space',5l of-the casingprovided be- 1 tween the valve seat and the perferated baffle, and said flange is; arranged to playin-the. s ace, 5, so that when the washer '19 leaves I t evalVe seat on theinitial "openingmovement oflthe valve, that portion'otthe-flange, 20 at thefree end of said valve willclose the air passage for a verylimited time, thus -giv? mg the iuebplugjvalve an. opportunity to' open by the time that thcilangeZ'O" leaves the space, 5, of" the casing, whereby-the fuel and air are'admitted'to the chamber 17 in a way to secure the immediate ad mixture of the fuel with the air and thus produce-a proper combustible vapor. When the air valve is returned toward its seated osition, the fuel valve is entirely closed to s iut oil the inflow of fuel before the air valve is fully seated, the flange, 20 cutting oil the flow of air prior to the operation of seating the air valve.

The casing, 5, is provided in its chamber 17 with a ledge or shoulder, 21,- whieh' forms the seat for the air valve, 18, and between this valve and the air inlet is arranged a means for dividing or splitting the inrushing' current of air in order to split the same into fine streams, the better to absorb or take up the fuel that is admitted to the chamber 17v .1 i mounting the air valve, lt'se'rves as the 100 Y the valve toward the .hinged side thereof.

.- "in I mitted -.to-, the-"*carbureter, 'revente'd 'throughthe chamberedpart'26 oft e casing.

f fAt o neside of thecavi'ty,*26, the extendedsented by Figs; 1 and 3 of the drawings as a- 22, of anydesired cross sectional provided with a multiplicity "of perforations through which, the air' is .ad sl plted topass when the air valve is opened.

' baffle plate,

" shape, and itis provided-with a number of bearing openings, I II 23, for'the accommodation of the fuel valve,

plug to more effectually preventleakage of Zitlwhydroearbon 'used'as fuel'i'n devices of 'L' thisclass.

' provided with a milled'head, 24, 20

. by opening the fuel valve, the fuel being 51-; lowed .to spread or diffuse itself over the spreader and thus placed directly inthe path the divided streams of air, in order to secure a perfect admixture of the fuel and air.

This dividing or, spreading means is repree extended--rearside, 6,"of the casing 8,,the latter being inthe form of a tapering Oneend of this valve plugis while the otherjend is extended to produce a cylindrical shank," 25, the latter being formed:

with a male thread at its extremity. -The extended rear side, 6, of the casing is formed i I fitted 'the end portion of the arm, 19 of"the.

the bearing with a space-or cavity, 26, betweentwo of fuel valve. On this part of said valve 1s air valve, said arm projecting into the space or cavity, 26, and being made fast in a suite able way to thefuelwalve, asfor example by a set screw, 19, thereby making the, fuelvalveturn'onrock with the air valve, so that 3e mounted direclty on thefuelvalve.

ting thevalve' lug, 8, in the bearing open the two valves are operativel connected for conjoint movement 1 and the air valve is By'fit-J I I ings, 23, whic are provided. on-"o' posite sides of the point of attaehmentof "t e arm:

19? to saidfplug, leakage oflhydrocarbom ad- I rear part, 5, ofthe casingis 'pr'ovided'with a the valve-plug,

eluding the bearing openings, 23.

chamber',-27, into whichisfitteda'gland, 28,; the latter being screwed onthe shank, 25, of 8, said gland'being engaged 5 by 'a check nut, 29, that is also screwed on the shank of .the plug-valve. Within the chamber, 27, is arranged a coiled spring 30, that fits'loosely around the plug valve and acts against the gland 28, for the purpose of holding the fuel valve snugly in the seat provided therefor in the casing, said seat indent. that the tension of the spring'may be regulated by adjustment of. the gland in one direction or the other on thejshank of the valve, 8'/and this gland is prevented' from turmn accidentally out of its adjusted posi-- tion by the check nut.

The valve plug, 8, is proyided with a bore or passage 31 which extends "lengthwise 25 thereof. Said valve is; flir- I through agartof'the valve, and through; the

headed en "thermore provided with a plurality of transverse'pass es, ,32 which mter'sectwith the lon'itudina bore,'-31',' thereof; said assages 32 eing disposed in'the stag ere ahned-relation; lengthwise ofrt e valve, as shown byFig; 4.

openings, 23, which space is spanned by a part of the-tapering plug or It is evi- In the construction am by Fig. that or dis- I part of the extended rear-side, 6, ofthe cas- 'ingrin which -the'va1ve'8 is rseated, .is pro 1x55 3 8 '6 fuel valve easingzof uniform diameter and those in the 's'agesiof the fuelvva ve are adapted, when it is moved te'anot'pe'n position, to register suecessively'with t e passa'ges'of the. casing in order madma a graduall increasing quantity of -fuel to the chain nponthe area of theair inletafi'orded by the plug of graduated diameters. {In the ar-' rangementshown b the-drawings, the pas-- er -17 dependent I an: valve -lwhen it isflo'ened, As the air. valve assumes a v artia fopenedeondition by'thejin'rushfo air,jt e fuel valve 8' is' turned to-' bring'its firstpassage'32-into' reg- I Itri'with the arge passage,' 3 0f the easing, and on the? continued opening move 'ment ofthe air v'alve, the plug {valve Sturhs or more of the passages-'32 successively into further-aroundin its seat so as to bring two- ,register with the passages, '33 ,'the first passage-or 1' passage, 32, remaining I in 'comgnunicationwlththe larger passage-or passages33 in a -way to avoid cutting ed the sitilpply of.

' fuelthrough'the'passages first opene and to increasinglyadr'nit fuel to the chamber 17 on the'continued opening movementofthe two waives,- thereby admitting the a proper quan tity vof fuel in proportion to the air supplied bustible vapor. I

- Fuel is. admitted to the extended rear part, 6, ofthe casing by the pipe, 16, to pass through one or moreof the coincident pass'agesin'said casing and the valve, 8, accordto the chamber for securinga pro'pereom ing to the-numberofpassages in each series a which are brought into. service by the opera,

eration of the air valve, but normally the two valves 8 and18 occupy closed positions, in order to cut ofl thepassage of air, the ingress I of fuel,"and any'possible back pressure-or ing" movement ofthe fuel valve-by the 0352+- back firing from the en ine. A-s ring, 34, is

mounted 'on a pin or bo t, 35, the atter being secured in; the rear chambered part 6 of the caslng, one end of said spring actingagainst the air valve, or its arm, while the other end of the-spring is seated against the casing,- see The re ulating. stern, gopis vexternally threaded or a part of its length, and it is provided with a plurality 'of annular collars formin a like number of annular grooves or 'channe s, 37, said stem being also provided v valve plug are of. graduated sizes, then itis necessary to make the annular grooves vary in widthxcorrespondingly to said passages although it will be understood that we reserve the 1 rightlto construct the valve plug, theregulating stem, andthe passag'esm the caschamber 17. vI g I, The stem, 36, is fitted in the longitudinal bore, 31, of the valveplug, to have threaded ing in a way to secure thedesired admission and control ofthe'fu'el to be supplied to the engagement therewith,.and to bring h the corresponding end ofthe valve. 'stemis screwed a check nut, 39,. adapted to 5 accidental'displacementj of the. stem within the valve. By screwing back thelcheck nut, I the stem36may-"be screwed into or out ofthe fuel valve more or less,for'regulatin thepo sition ofitsgroovedportion with re ation to. the-passages,,32, ofltheiplug, 8, and provi Irtion is thus made'for effecting; a, variation in the eflectiveareaof the ports formed by the passages 32 in" the,fueljvalve,whereby-the I carburetor may beregulated to a nicety.

In the construction shown by'Fi 3 of the grooved portions thereof into registration with the assages of the valve, the headed end 38 0 said stem being exposed beyond On said abut the end; of the fuel valve and-to prevent volume of fuel supplied by the val ve 8 to the zdrawings, the air valve and-the uel valve are mounted iudependently of each other, falthiiugh they are connected'operatively in order to fmake the fuel valvelcontrollable the air valve as contemplated by this inven t-ion. :According to this embodiment of the invention, the arm, 20*,0f the air valve is mounted on a pin or bolt, 40,.which is provided in the rear chambered 1 part of the cas-' ing, and.around this pin is tted the coiled spring, 41, one end of which acts against thealr valve, while the other "end isfiseated against the casing The fuel valve is fitted to lts seat in parallel relation to the axis of movement of the air valve, and the two valves are coupled'byan arm, 42, the latter being fast with the fuel valve, saidarm beingconnectedby a link,--43with the air valve, The link, 43, is pivoted to the air valve and to the arm of the fuel valve at points which are separated for a distance equal to that-be-.

tween the axes of motion of the air valve and the fuel valve,- and thus the armsf'l'Q and ,'joint movement of thetwo valves. vWe do not confine ourselves 'to' the de- 42 of the two valwes are kept parallel re lation in the opened and closed positionsof said valves, thereby insuring the proper conscribed means for effecting the endwise ad- 'valve, nor to the grooved form of the stem, because in Fig.6 of the drawings we have shown another-form of construction which secures the desired .endQ Instead ofscrewing thestem by a rotary motion directly into the fuel valve, and providing said stcmwith an- .nular grooves, we may provide the stem 44, with transverse bores, 45, the latter being sta gered similarly to the fuel passages of the fue 'valveand being either of uniform S120 or of graduated sizes correspondingly to the ustment of the regulatingstem in the fuel fuel passagesof the plug, 8. This stem is 7' s lined, at 46, to the fuel-valve, in ordcr'to llmit it to end'wise movement in said valve,

and said stemis' externally threaded, at 47. v

,'An adjusting nut, 48-, has threaded engagement with the threadedpart, 47, of the stem, said'nut being provide'd'witha head 49 and with a flange, 50, the latter abutting the end of the plug valve and held or confined loosely thereon by the heads of screws, 51, that are fastened to'the end portion of the plug, 8. Said nut .is thus mounted on the fuel valve in a way to turn freely thereon, but it is held against endwise displacement. By rotating the nutin 1 one direction or thefothe'r, the

stem is movedendwise in the'fuelvalvefbu't the spline holds j the stem-against rotation,

'wherebythe bores of the stemnnay bead-l justed more or less into registrationtvith the: passages of the fuel valve,for. reigulatingthe effective-area of the @valve' passages and conse quently. determining the; quantity of fuel I admitted'by saidv valve, when openedfeither partially or wholly,- -to the earbureter. The stem and the {nut are confined in their ade'ing screwed onthe threaded 1pm of the stem'andengaging with theadjusting nut.

. InFi'gQ' 1 of the drawings 'we have shown readily understood from the foregoing doecrrption taken in connection with the drawin Normall ,\the air valve and the fuel- 'va ye are close either by the back pressure from the engine or by the spring, but at a .proper time, the suctionof the engine causes an lnrush of air that opens the airvalvc, the

inward movement of which rocks the fuel valve to an open position proportionately to "usted.positions byjacheck nut 52,'the,samo 1 l ting fue of. the c being divided or split into thin streams by thorough admixture of the I exclude the air just after the' fuel valve the casing as having graduated fuel .l i Z0 versa, it should be understood that we. also:

reserve the right to use graduated passages I 1 shown by but we reserve the rlght to provide any suitosition of the air valve, thus admitto the chamber 17, which quickly flows ors reads itself over the inner surface amber and over the perforated baflie, so as to be diflused in a manner which facilitates its'absorption by the air, the latter the like the perforated baflle, therebysecurin a ir and fuel to produce a perfectcombustib e mixture orvapor. -\Nhen the-suction'ceases, the spring acts to quicklyreturn the air valve'to its closed position, and the return movement of, theai r valve is communicated to the fuel valve, the flange of said air valve acting to,

closes.

Although we have shown and described assages,

and the fuel -,valve as being provi ed with staggered passages of uniformsize, or vice.

in'the casing and graduated passages in the fuel valve, thus providing for the control of the fuel su ply to the chamber 17 under .proper con itions in theservice'of the carbureter. I

' In theservice of the carbureterin connec tion' with automobile engines, we findi that it is desirable toprovidemeans for regulatin the quantity of fuel admittedby the fue valve plug independently of the operation of the fuelvalve' itself, and to this end,-we extend or increase that part of the casin in which the fuel passages 33 are provide as Fig. 8, in order that anadditional bore or valve seat, 55,'may be provided in the casing. This bore or valve seat accommo dates the regulating stem or valve, 56, which may be mounted foerotary .adjustment and provided with annular grooves, as in the construction ofFig's. 2 and 5,. or it may be provided with transverse bores and fitted to the casing for slidable adjustment, as in the construction of Fig. 6. In case the independent regulating valve is used, the plu Valve, 8, is simply provided with the staggered transverse passages, such as he'reto ore described, and said valve 8 is provided at its exposed end with a key 58, or the like, a

whereby it may be manipulated by hahd in startin the engine, if desired, although said fuel va ve is controlled automaticallybythe play of the air valve when the carbureter is 1n service. It is to be understood that the separate fuel regulating valve, 56, may .be provided with a' milled head and check nutfor its adjustment, or with a rotary nutand check nut, as in Figs. .2. and 6 respectively,

a" le'means'for adjustingithe re ulating stem fromthe automobile, as desire The regulating stem or valve 56 may be either cylinthe carburetor we hav'eindicated the This throttle valve may be ad-.

drical, or it may be conic'alsimilar to the plug of the fuel valve. -Of course, the'fuelvalve plug operates in unison withthe air valve, so that it is subject to considerable wear which is taken action of the spring, 30, but there is very little wear, if any, ontheregulating-stem or valve, because the'latter may be'adjusted at intervals, such as made necessary by atmospheric changes. 1 j

For preventing excessive motion of the air valve, we may employ an adjustable stop, 59, shown-byllig. -7 in the formof a screw which finds casing 5. Said screw terminates adjacent to the air valve, to limit the inward swingin movement thereof, but it may be adjuste 7 toward or from the air valve, to increase or a threaded bearing, 60, in the] up automatically bythe d'itions may require.

It is customaryin some engines to employ a throttle-in thesuction connection between and the engine, and in Fig. 7 position of the throttlev valve'at 61. justed to increase or diminish the .volume of carbureted vapor adapted to besupplied to the engine,'thus controlling the force of the explosion and effecting a regulation in the speed of the engine.

Changes in the form, size, proportion .and minor details of construction may be made without departing from the spirit or sacrificing the advantages of our invention, and

we therefore reserve the right to make such alterations as fairly fall within the scope of the invention as defined by the annexed claims. I

Whatwe claim as new and desire to secure by Letters Patent is 1. Ina carbureter, a fuel valve rovided with a plurality of fuel passages, a justable means cooperating with said valve for varying the area of said passages, and means operated by a suction draft. through the carburetenfor operating the fuel valve.

2. In a carbureter, a fuel'valve provided g with a plurality of graduated-fuel passages,

means cooperating with said fuel passages for varying the area of the fuel-inlet, and means for operating said valve.

3. In a. carbureter, a casing provided with a plurality ing a pluralityof fuel with said passages 0 operating with said for varying'the assages in registration the casing, means copassages of the valve antity of fuel admittedto fuel valve. v

a 4. A carburetor having a casing, an, air valve, a tapered fuel valve having a plurality .Qf openings and seated in said casing and adapted to be rocked by said air valve when the latter is opened by 'a suction draft through said casing, and an adjustable stem for regulating the effective area of the port of fuel passages, a fuel valve havu said casing, and-means for operating the formed by said perforations in the fuel valve.

5. A carbureter. comprising a casing, a fuel-valve mounted in said casing for rocking movement therein, a suction-operated member-movable in the casing, and means connecting said member with saidfuel valve,

whereby the fuel valve is operated by the suction Operated member.

, 6. A carbureter'comprising a casing havmg a chamber and a fuel-valve seat, a fuel 7. A carbureter comprising a casing--hav ing means for admitting air thereto, a rock:

ingfuel valve, and an air valve mounted on the fuel valve, the latter constituting the axis of movement of the air valve. 2

8. A'earbureter-comprisin a casing-having a chamber and-a fuel-Va ve' seat, an'air valve pivoted to said casing for swinging movement in the chamber thereof, a fuelvalve occuping said seat .of the casing and adapted to turn axially therein, means connecting said 'air valve with said "fuel valve 'for rocking the latter by the swinging movement of the, air valve, and means for keeping I the-airvalve closed.

9. In a carbureter, a casin having a plurality of fuel passages, a fue valve provided with fuel passages adapted to register with said passages of the casing, a stem cooperating with one grou of said passages for varying the area of t e fuel inlet to the fuel valve seated in said casing, saidvalve having a plurality of fuel passages and an axial bore, a suction-operated element for actuating said fuel valve, astem in the axial bore of the fuel-valve and cooperating with the assages thereof for regulating thearea of t e fuel inlet to the casing, and means for adjusting said stem.

11.. A carbureter corn risinga casing having a fuel-valve seataml a plurality of graduated fuel-passages, a rocking fuel valve fitted to said seat and provided with passages arranged to register with those of the casing,

and an air valve connected operatively with the fuel valve.

12. A carbureter comprising a-casing having. a fuel-valve seat and a plurality of fuel passages, a rocking fuel-valve fitted to said seat and provided with-a luralit of ports which are disposed in disa ed re ation and are adapted for successive registration with the passages of the casing, and anair valve connected 0 eratively with the fuelvalve.

Y 13. A car ureter ,Haivinga casing. a fuel connected with the fuel valve.

casing, and means for adjusting said stem. 10. Ina earbureter, a casing, a rocking membeno'perated by a suctiondraft for auto:

vmati'cz'tlly rocking saidtapering. valve.

valve having a bore and a. plurality of ports,- an endwise movable stem occupying the bore and having ports adapted for registration with those .of the fuel valve, and an air-valve 7 O 14; A carbureter having. a cas ng, a rocking fuel valve. havinga plurality of transverse passages, a stem fitted to the fuel valve for movement therewith and capable of an endwise adjustment with respect to said 5 transverse passages in the valve for regulating the effective area of the port therein, and. an air'valve connected.operatively with the fuel valve.

15. Acarbureter comprisingaQasing'hav so ing a suction connection andan airinlet,v a rocking fuel valve, an air valve mounted on the fuel valve, a perforated baffle between the air inlet and the'fuelval've, and means for normally seating both valves:

16. A c'arbureter comprising a casing,- .a tapering fuel valve 'seatedfin said casingfor rocking movement therein; a swingingair v valve, means whereby the swinging movement-ofthe air valve is communicated to the I fuel valve for rocking-the latter on its axis,

and-means acting on one of said" valves for holding both of them in closed positions. 17. A carbureter comprising a casing having a'plurality of graduated fuel passages, a

rockin fuel valve provided with staggered or dis 'ned ports whichare adapted for registration successively" with the assages of e the casing, means for regulating t 1e effective area-of the ports in the fuel valve, and an air loo valve controllable by suction through the draft on t e air valve operates both. valves casing and connected operativ'ely with the simultaneously to open'the air and fuel inlets to said casing.

19. A carbureter. having a rocking fuel valve provided with a plurality of transverse ports, means for regulating the effective area of the ports in said valve independently of 11s the rocking movement thereof, and a suction operated air valve connected operatively with the fuel valve for rocking the latter.

20. In a device of the class described, a

valve having transverse fuel passages of graduated cross sectional area, means internally of said valve for varying the area of I said passages, and means for operating said valve.

21. In a device of the class described, a

22. In a device of the class described, a' In testimony that we claim the foregoing casing having a plurality of fuel passages of as of our invention we have signed ournames graduated cross sectional area, a valve proin t epresence of two subscribing witnesses. vided with a plurality of fuel assages 5 adapted to register with the passages of the EDWIN F. ABERNETHY. (casing, adjustable 'm'eans cooperating with GEORGE-H. ABERNETHY.

said valve for varying the area ofthe fuel I passages therein, and means independent of I Witnesses: p the a oresaid' adjusting means for operating CORNELIUS P. McLAUGHLm, 10 the fuel valve. f v PERCY J. EDWARDS.

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