US1313332A - Planooraph co - Google Patents

Description

C. L. RAYFIELD.

cmaunmn.

I APPLICATION FILED API.|5.\914. 1,313,332. PatentedAug. 19,1919.

5 SHEETS-4H5 1.

C. L. RAYFIELD.

Patented Aug. 19, 1919.

5 SHEETS-SHEET 2- TH! UOLUMBIA PLANDUMPH 50-. WASHINGTON, D. C.

G. L. RAYFIELD.

cmuamn.

APPLICATION FILED APR-16.]9ll. 1 ,3 1 3,332. Patented Aug. 19, 1919.

5 SHEETS-SHEET 3.

7' bar/gs L.i?ayfz'el C. L. RAYFIELI).

CARBUBEIER.

APPLICATION FILED APR. 16. 1914.

1,313,332. Patented Au Qw, 1919.

5 SHEETS-SHEET 4.

C. L. RAYFIELD.

CARBURETER.

urucmon HLiD ml. linen.

1,313,332. Patented Aug. 19, 1919.

5 SHEETS-SHEET 5- was TUB COLUIIIIA FLANOOIAFH CD. WAlNIHli'I'ON. D C.

UNITED STATES PATENT OFFICE.

CHARLES L. RAY'FI-ELD, OF CHICAGO, ILLINOIS, ASSIGNOR TO FINDEISEN & KBOIPF MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A. CORPORATION OF ILLINOIS.

GARBURETER.

Specification of Letters Patent.

Patented Aug. 19, 1919.

Application filed April 16. 1914. Serial No. 832,158.

To all whom it may concern:

Be it known that 1, CHARLES L. RAY- FIELD, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Carbureters; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked there on, which form a part of this specification.

This application relates to improvements in carbureters of the type shown in my patent for multiple jet carburetors, No. 1,224,207, dated May 1, 1917.

It is an object of this invention to construct a multiple jet carburetor wherein certain of the needle valves are connected to the throttle of-the carbureter for simultaneous actuation therewith, and other valves for the inlet of fuel are connected to the automatic air inlet valve to be opened simultaneously therewith.

It is also an object of the invention to afford a construction of the class described in which air inlet ports are provided for each jet positioned to conduct the air across the jet when in operation.

It is a further objection of the invention to afford a construction in which a residual supply of gasolene or other hydrocarbon fuel is maintained at all times in the path of the infiowing air to assist in initial carhuration and to afford a large vaporizing area exposed to the inflowing air.

It is also an object of the invention to afford a construction adapted for ready adjustment to insure satisfactory operation at high and low speeds of the engine.

It is a further object of this invention to construct a carburetor wherein a plurality of fuel inlet valves are connected for independent operation, one connected to be actuated simultaneously by actuation of the throttle valve and another by movement of the automatic air inlet valve and with means in combination with said inlet valve to force valves. I

It is also an object of this invention to construct a carbureter in which the level of the fuel in the float chamber may be momentarily raised, due to a sudden opena fuel under pressure through said fuel infg of the throttle valve to an ent the. flow 0 fuel through the supply va ve and facilitate acceleratlon of the. motor.

It is also an object of this invention to construct a carburetor embodying a plurality of fuel inlet valves independently operable but each communicating with a common source of fuel supply, and with means for augmenting the pressure in the fuel supply with an opening of the automatic air inlet valve of the carbureter to force a fuel through said respective fuel valves under pressure.

It is furthermore an object of this invention to construct a carburetor wherein a fuel valve is connected to an automatic air inlet valve for simultaneous actuation therewith and with a dash pot mechanism for preventing fluttering of the inlet valve and fuel valve and acting to force fuel under pressure through said fuel valve when said valve is opened by said air valve.

It is finally an object of this invention to construct a multiple jet carburetor embodying a plurality of independently operatable fuel supply valves as well as means acting automatically to augment the pressure to force fuel through said valves with a sudden opening of the automatic air inlet valve of the carburetor, and each of said fuel valves and air valves constructed for adjustment to suit varying conditions of o ration.

y invention also has other important objects which will appear from the following specification and the accompanying drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

In the drawings:

Figure 1 is a side elevation of a carbureter embodying the principles of my invention.

Fig. 2 is a similar view of the other side thereof.

Fig. 3 is a view similar to Fig. 2, but showing a view in central section takenthrough the carburetor.

Fig. 4 is a view similar to Fig. 3, showing a modified form.

Fig. 5 is a fragmentary central vertical section taken through the air inlet end of the carhureter.

Fig. 6 is a fragmentary section taken on line (S -(i of Fig. 4, 'withoparts'mnitted.

Fig. 7 is an enlarged detail sectional VlGW of the fuel inlet valve connected to the air valve of the carburetor.

Fig. 8 is a section taken on line 88 of Fig.1. 7 Y a f Fig. 9 is a fragmentary to.p,,,p lan view of the lever connections on the earbiireter.

As shown in the drawings:

The carbureter rises anintegral casing affording a float dichainber 1, anda mixin Jehamber '2. The, casin of the float feed c amber 1 comprises cy ndrical s de walls and an inte' ral bottom wall 3, having a central or axial ownwardlydirected tubular boss 4, integral with the bottom thereof and opening upwardly thereinto'. Saul boss is closed at its lower end by means of a screw plugj, threaded thereinto and engaging a suitable packing washer 6, between the same and the end of said bossto seal the connection. The cover 7, for the'floa't feed chamber is removably securedthereto and extending axially through said chamber-and a suitable central aperture in said cover 7,is a rod 8, of a lengthito extend into the bore in sand boss 4, as'sh o wn in,Fi s. 3 and, F and to normally extend slight fy above the, cover through 1 an aperture therein. Ad ustably but'rigitlly secured on ,sai'drod 1s a float-'9,

in the present Instance shown as constructed of sheet metal, and heritage sleeve 10, extending central] therethiough, and througll which the rod extends." Said float feed chamber is cored in the, side adjacent the mixing chamber to register with an inward extension A, of the chamber in the space be tween the same and said mixing chamber, and, as shown, the casing Ofthe mixing chambr 2, is constructed to afford a similar chamber B, extending over said chamber A; The bottom of, said chamber A,-0f the-float feed chamber, is provided "with i an aperture theretlrrough, and threaded there-in at its" upper end' is a cylindrie plug '11, which serves to rloSe the bottom of that portion of the fleaefeeacnamb r and isprevided with a central upwardly opening recess or bore therein, communicating" with r restricted central bore extending therethrough',"whit1h afid'rds the sealf'for thefinlet needlevalve 19', through whith'tlrc flow of tl1ehydroear-' bon fuel into the float feed chamber is an trotledi" Sald plug provided on its lower end with ,a peripheral downwardly extend- 111g, internally threaded flange 12; and unleaded fih'ereinto ise bellow tonne-mien 13, having a screen 14, stretehed across the'to'fi thereof."

V The induction pipe 15 *Wliereblythe gage lane tank icorflmunicates witll the heat feed cliamberfisthreaded intd 'sai d cdfliietion 13. The horizontal partition 16, between the extension B, of the mixing chamber and the extension A, of the float feed chamber, forming the bottom of one. and the top of the other, is provided withan aperture therethrough and threaded therein in alinement with the corresponding seat in the plug 11, is the tubular nozzle or 'et pi e 17, the upper cnd'of-whielr extends a'ove t' lic partition '16; in said extension of the mixing chamber, and the lowerend bf which extends below said partition 16. Slidably and loosely engggfd thereon in the extensionA, of the Heat f ehamberris a sleeve 18, which, near its lower end, restricted andtapercd to a point to aiferd the valve closure 19,to seat Within and to close the induction" passage throughthe plug 11. Said sleeve 18, is pro vided with apertures 18, therein slightly above the" bottom of the float-feed chamber to ad'rnit'thefluid from sairl'float chamber thereinto, and"a peripheral flange 20, is provided on said sleeve interniediateits end as shown in Fig; 3. A weak springQl, is engaged around said sleeve and bears at its 11pper:fencl against the Wall 16, and at its lower end on said flange to hold the. lower needle valve 19 norn'i-ally closed when the float feed chamber is sufficiently full to support the float.

Removabiy secured in the float feed chainberion' the bottom 'thereoif is a bracket 22, and ivotal'ly engaged'therebnis a lever 23, the siorterend of which is yoked to engage around the sleeve 18 below-the flanQe'QO, and the longer end of which is provided with an apertureftheretlirough to reeei've'the rod 8. Asshown, a diametrically apertured ball 21L, is rigidly secured on said radii, and seats on said longer end of the lever 23*; to, aflord a self-adjusting bearingfo-r thefloat onsaid lever. Said pm 11, is providedwith a passage 25, exten ing downwardly from its inner end'to a passage 26, extending peripherally from thesame. A pipei27 is at bne ofitsendsthrea'ded into said 111911, and communicates with said" assage 26, and at its other end is thre'aded 'mtotlre lower end or extension orming a d-ash"pot 28, of an airinletvalve casi '29,- whieh is threaded on a herizontally di ete'd portion of the inlet to the mixin chambera.

Integral with he wall ofth'e mixing chamber anddirectedtoward the float feed chambar is a bracket 'or arm 30, having a cylindric seat in the ur'idersidethereofico axial with the bdreof the-jet nozzle 17, and engaged therein at es -upper end and extending through the top' wall 31, of the extension B, of the n'iixing chamber isa-needle valve cldsure32, fdrsa'ifl; jet nozzle 17, A spring 33, engaged in said seat in the arm 30, beats on t'heup'per end bf said need1e=va1ve to hdld the senile normally seated:

Journaled in a suitabld bearing on the wall of the-maxing rhem'ber 5s a trensverse shaft 34, and secured thereon and projecting into a slot in the stem of the needle valve closure 32, is a finger 35, which acts with the rotation of said shaft 34, to raise said needle valve closure against the tension of said sprin 33. At the upper end of the casing affording the mixing 0 amber is provided an outwardly extendin flange 36, which may be apertured to a ord engagement with the manifold pipe leading to the engine. Extending through said mixing chamber is a shaft 37 parallel to shaft 34, above the extension B, of the mixing chamber, and rigidly but adjustably secured thereon is a butterfly valve closure 38. The butterfly valve closure 38, is slightly cut away on one side thereof to afford a suflicient passage for the mixture to the mani fold pipe to support combustion when the throttle is substantially closedor at its lowest running adjustment. Secured on the outer end of the shaft 37, is a throttle lever 39, whereby said shaft may be rotated and said butterfly valve adjusted. Also rigidly secured thereon is a rectangular block 40, at the inner side of the throttle lever and slidably and adjustably secured thereon is a cam 41, comprising cam faces arranged approximately at right angles to each 0t er and the angle corner portlon which would be formed thereby cut away to afford a rounded continuation of the cam, as clearly shown in Fig. 1.

A screw shaft 42, journaled in the ends of said cam block, is threaded through said block 40, and extendin through a notch in the shaft 37, is provi ed on its outer end with an adjusting head 43, whereby the cam may be shifted on said block 40, with refer ence to its center of rotation, to-wit the shaft 37.

Loosely engaged on the shaft 34-, for adjusting the needle valve closure 32, is a downwardly and forwardly extending arm 44, provided at its forward end with a bearing plate 45, removably secured thereon and engaging said movable cam member41, and adapted by engagement therewith to actuate said lever and the shaft 34, to operate said needle valve. Integral with the arm 34, is a downwardlyextending arm 46, provided with a set screw 47 extending therethrough and rearwardly beyond the same.

Rigidly secured on said shaft 34, by means of a bracket arm 48, is a tubular element 49. Journaled in said element is a shaft having rigidly secured on the lower end thereof a cam or eccentric 50, which bears against the rearwardly extended end of the set screw 47 and provides engagement whereby the bracket arm 48 and shaft '34, are operated to regulate the fuel valve 32, by the movement of the levers 44 and 46. Slight movement of'the shaft 34, is thus permitted independently of the movement of the arms 44 and 46, by rotation of the cam 50, against the adjusting screw which serves to swing the lower end of the sleeve or tubular element 49, forwardly, thereby elevating the finger 35, secured on said shaft on the interior of the rarbureter and slightly opening the needle valve 32 and admitting to the extension B, of the mixing chamber a supply of fuel. Secured upon the upper end of the shaft contained within the tubular element 49, is a lever 51, and an actuating rod 52, is connected thereto at the extremity thereof by means of a set screw 53, and said actuating rod 52, extends slidably through a bracket 54, mounted on the cover of the float feed chamber.

Rigidly secured on the end of the shaft 37, at the opposite side of the carbureter is an arm 55, provided with a set screw 56, adapted to engage on a projection or lug 57, on the outer wall of the mixing chamber, as clearly shown in Fig. 2. As shown, a set screw 58, is employed for engaging said arm 55, on the shaft. Said set screws 56 and 58, afl'ord means for adjusting said arm to limit the degree of closure of the butterfly valve to the required amount to maintain a suflicient supply of mixture to the motor to maintain the combustion at the lowest speed of the motor.

A supply of air is provided for the inlet jet 17, and this is admitted through an inlet port provided in the extension B, of the mixing chamber slightly at the rear thereof, and a peripheral flange or tubular extension 59, in the wall of the casing is provided around said port and extends outwardly substantially flush with the side walls of the casing as shown clearly in Fig. 2. The passage therethrough tapers inwardly to conduct the air in a strong inflowing cur rent or jet against the jet of hydro-carbon as it comes from the needle valve, thus spraying and thoroughly vaporizing the same and carrying the same therewith into the mixing chamber 2, beneath the butterfly valve 38. As shown also in Fig. 3, a slight elevation or rib 60, is provided on the floor of the extension B, of the mixing chamber at the point where the same communicates in the main mixing chamber, thereby serving to maintain a'thin film or layer of the hydrocarbon fuel on said floor 16, to expose a large surface to vaporization.

Another inlet fuel valve or nozzle is provided within the air inlet casing 29, and this comprises a tubular member 61, which is threaded into the top wall of the dash pot chamber 28, and extends downwardly there-- through communicating therein at its lower end through an apertured plug 62.

A perforated cap 63, is secured around the upper end of said tubular member 61, and slidably mounted therein and through the upper end of a tapered aperture in sald tubular member is a tapered valve member (i4. Said tapered valve closure 64, is held normally in closed position b means of a coiled spiral spring 65, seats on the plug 62, in the lower end of said tubular member, and at its upper end said spring bears against a spider 66, integral with an upwardly extending rod 67, which is rigidly engaged in the lower end of said valve closure 64.

An air inlet port is provided to deliver inflowing air to and across the top of the jet nozzle 63. For this purpose as shown a suitable aperture is provided in the upper wall of the casing 29, and threaded thereinto is an outwardly flaring casing 68, affording an inner seat against which a conical disk air inlet valve closure 69, is adapted to rest. An elongated tubular boss is formed axially within said casing 29, and wound therearound and seating at its lower end on said boss is a spiral compression spring 71, which at its upper end seats within a recessed portion of said valve closure (59, to normally hold the same in closed position. A valve stem 72, is rigidly secured in said closure 69, and is slidably mounted Within said tubular boss 70, with the lower end of said stem extending into the dash pot chamber 28, and secured on said lower end is a piston 73, adapted to move within said dash pot chamber and apertured to receive the tubular element 61, therethrough.

A contact screw 74, is threaded through one side of Said valve closure 69, and is adapted to contact the upper end of said closure 64, to depress the same with a downward or opening movement of said closure 69, and inasmuch as said contact screw is threaded into the aperture 69, it may be adjusted to contact the closure 64, at any predetermined time.

As shown, the outer periphery of said flared casing 68, is fluted, and a spring detent 75, is mounted in an extension 76, formed on said casing 29, to hold said flared adjustable casing 68, in an adjusted position. Of course, when the casing is adjusted inwardly the compression of the spring against the closure 69, is increased thereby, while outward adjustment decreases such pressure, thereby allowing'the air inlet valve to openat any desired predetermined draft or difl'erence of pressures.

As shown, a tubular casing or hood 77, closed at its upper end is threaded upon a central raised boss 78, on the cover of the float feed chamber to exclude dust and dirt therefrom. Said boss, as shown, is also provided with a vent passage 79, therethrough from the float feed chamber to vent said chamber against internal pressure. Pivotally engaged in said hood and extending through a slot in the side wall thereof is a bent lever, one arm 80, of which extends over and into=poiition to engage the rod 8, when the float feed chamber is filled to normal capacity. The other arm 81, of said lever extends downwardly on the outer side of said hood and is engaged by a suitable rod to permit manual actuation thereof holding the rod 8, with the float thereon downwardly until the carbureter is slightly flooded to facilitate starting carburation. A spring 82, is engaged on said lever and acts to hold the arm 80, upwardly out of position out of contact with said rod 8, as clearly shown in Fig. 3. As clearly shown in Fig. 3, the carbureter casing is cored around the mixing chamber to aiford an exterior water jacket denoted as a whole by the reference numeral 83, which may be connected to the radiator of the engine if desired. However, such a water jacket may or mav not be provided, depending in part on the size of the carbureter, the capacity required and the character or use for which intended.

In the modification of my device illustrated in Fig. 4, I provide two parallel shafts 84 and 85. respectively, in a mixing chamber 2, which is open at its lower end, as indicated by the reference numeral 86, said shafts mounted above and below the extension B, of the mixing chamber respectively. Rigidly but adjustably secured on said shafts are the respective butterfly valves 87 and 88. The upper butterfly valve closure 87, as pointed out may be slightly cut away on one side thereof to afford a suflicient passage for the mixture to the manifold pipes to support combustion when the throttle is substantially closed or at its lower running adjustment. The lower throttle lever 88, is provided with an upwardly exten-ding boss or projection 89, to which is pivotally engaged the lower end of a link 90, the upper end of which is pivotally engaged on a rigid bracket arm 91, secured at its other end upon the extended tubular portion 92, of the automatic air inlet valve closure 69. Said rigid bracket arm 91, is provided with an aperture 94, to receive the valve closure 64, therethrough and is of suflicient size to slide downwardly around the top 63, and upper portion of the tubular element 61, with a downward movement of said air inlet valve closure 93.

The operation is as follows:

The carbureter having been assembled and suitably connected with the manifold pipes of the engine, and with the fluid supply pipe from the tank, is adjusted to regulate the air supply through the automatic valve 69, and to regulate the inlet of the jet nozzle 17, in the extension B of the mixing chamber. The adjustment for said needle valve is efiected by turning the set screw 47, to vary the normal relation of the lever arm 46, and tubular bracket 49, which adjustmm anabksths required amount attache r1 be obtained for idling or low speed, and further adjustment may be had by turning the set screw 43, and moving the cam 41. This latter adjustment is effective onlv after the throttle has been opened somewhat and is therefore adapted to regulate the supply of fuel for medium and high speed. Thus a wide range of adjustn'ient is afforded, providing regulation for high and low speed, and moreover the fuel supply may be increased at any time by pulling on the rod or wire 52, and rotating the shaft in the tubular bracket 49, and with it the cam 50 which bears against the set screw 4'7, and

thereby shift the tubular bracket 49, and

the shaft 34, and raises the valve 30, to admit an abnormal supply of fuel through the nozzle 17, although this adjustment is designed particularly to be used in starting the motor. This is also facilitated by means of the tickler lever on the float feed chamber whereby the float may be held depressed and the inlet valve 19, held open to permit flooding of the float feed chamber. The automatic air inlet valve 69 of course is adjusted so that normally said valve remains closed. By adjusting the flaring casing 68 for said automatic valve inwardly or outwardly substantially any air inlet requirement for oer- .10 tain differences of pressure may be attained. The adjustment of the needle valve closure 32, within the extension B, of the mixing chamber is such as to maintain a low engine rate of speed, as when the engine is idling, the mixture escaping therefrom to the manifold pipe through the cut away portion in the edge of the butterfly valve closure 38, which is just above the mouth of the extension B, of the mixing chamber, when said butterfly valve is closed. As the throttle valve is opened wider thevdraft of the engine increases, thereby causing an opening of the automatic air inlet valve and consequently an opening of the fuel supply valve positioned in the inlet casing 29. In each case the airadmitted to the carbureter blows directly across the fuel inlet, thereby easily vaporizing the fuel and then passing on into the mixing chamber. A secondary action also takes lace with a sudden opening movement of the automatic air inlet valve due to the sudden depression of the iston 73, connected thereon. The chamber n which the piston operates is below the 35 normal level of the fuel in the float chamber of the carbureter and asthe chambers are in communication through the ipe 27, the piston chamber is kept filled with the fuel liquid. This is made possible by the somewhat loose engagement of the piston with the walls of the piston chamber and with the sleeve 61, which loose engagement enables the fuel to pass above the piston, and

is also due to the necessarily free engage- 66 ment of the stem 72, with the bore of the sleeve or hub 70, which furnishes a compensating passageway from the upper part of the piston chamber and prevents pocketing of air therein and permits complete filling thereof with the fuel, and also provides 70 relief therefor as the piston is forced downwardly. As the piston moves downwardly in the chamber 28, the valve 64 is opened and simultaneously pressure is applied to the fuel liquid below the piston which forces the fuel upwardly and out through the nozzle 61, and at the same time, on account of the connection of the pipe 27 with the piston chamber and float chamber, raises slightly the level of the fuel in the float chamber and augments the supply of fuel through the nozzle 17, so that both nozzles provide an increased supply of fuel and a rich mixture results which enables the engine to be accelerated instantly in response to a sudden openin of the throttling valve.

In the modified .orm of my device illus trated in Fig. 4:, I have shown two entrance passages for air, the one 86, in the lower end of the mixing chamber controlled by a butterfly valve 88, and the other past the automatic inlet valve 93. However, owing to the linked connection between said automatic valve 93, and the butterfly valve 88, movement of said automatic valve is immediately transmitted to the butterfly valve to open the same, so that with a sudden draft through the carbureter by the engine fuel is supplied to the mixing chamber from the nozzle 17, and as well through the nozzles 63. The vaporized fuel passes from said nozzle to the mixing chamber and is intermingled with a quantity of air entering through the lower end of said chamber, the mixture then flowing past the throttle valve 87, to the manifold of the engine. As before, a dash pct 28, with a piston 73, movable therein and connected to the air valve is provided, and acts in exactly the samemanner to augment the pressure throughout the fuel supply chambers of the carbureter-to force the fuel under pressure through the respective fuel nozzles with a sudden opening movement of the automatic air valve 93.

It is to be understood of course that details of con'struction may be varied through a wide degree. I have shown a preferred form of my invention, although numerous modifications and variations thereof are of course possible. I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. A carbureter embodying a float feed chamber, a mixing chamber, jet nozzles 126 therefor adapted to admit a hydro-carbon fluid, athrbttle valve, means for regulating the inletfrom one of the nozzles simultaneously and correspondingly with the adjustment of the throttle valve, .ports for ad: 130

65 and saidthrottle valve to cause sai ,mitting air into the Inixin' chamber across the discharge for the nozz es, an automatically operated normally closed valve for one ofsaid ports, a dash pot connected therewith, ,said dash pot being in communication withlthe float feed chamber to maintain a supply ,of fuel in thedash pot, one of sa d jet noaales communicating in said valve air port, and a iston movable in said dash-pot chamber an connected to said air valve to prevent flutteri thevpressure in t e fuelsupply of the car- .hureter to .ioroe, the fuel under pressure throu, h saidrespective 'etnozzles.

-2. ,carbureter em odying a mixing chamber, a float feed chamber, a dash pot chamber. communicating with ,said float feed chamber, a,,plurality of fuelinlet nozzles, one connected with the. float feed chamber and the othen with said dash pot chamber, a throttle ualve, an adjustable cam connected therewith 'for regulating the inlet from one ,ofthe nozzles Simultaneously with the adjustment of the throttle valve, a plurality of ,ports for admitting air into the mixing chamber, each one-thereof directing the air 4 across ,one oisaidnozzles, an, automatically operatingnormally closed air valve con- .trollin one of said ports, a piston. connected to vsai air valve and mounted in said dash ,pot chamber to prevent fluttering of said valve and .acting under, a sudden opening ,pfithe air valve to augment the; pressure in saiddash pot chamber and -floa eed chamher toforce fuel th ough said, nozzles under ,3. In a carbureter, a mixing chamber, a nozzle tor spraying the,hydro-carbon fluid thereinto, air inlet ports, a throttle valve, a normally closed air valve-controlling one of said ports,- connections-between the throttle valve and-said hydro-carbon nozzle, and a dashpot connectedwith said air valve acting ato ement thgpressure in the fuel sup- 45, ply,to force hy, r carbon through said fuel inoazlemnden ressure.

4. 1n anal ureter, a source of fuel, a mixing chamber, means for discharging the hydro-carbon finid thereinto at a plurality of difieretnt points, a float valvecontrolling the fiowof dual ,to. said points, air inlet ports, a ,throttle. valve a normally closed air valvecontrolling one ,of saidports, conmedia s betw en sai m r th valve an o e m an and da h 55,01, said hydrocarbon fluid pot connections .betweenlsa d air valve and the source of jlitvel,causiag an,,auginentation of gfiaesureimtheiuel supplyisonrce of the e r ate with ten n erv i g Q the-ai nalve. f

In vcarbnrete t e combination with ,tihe throttle valve, of anorgally olosed nlet, ir valve swam ,e tuflt nhy rapa'r 0n {J1 throtthereof and to augment 1e sa ecce s ie s between it sam rsiasee tle and needle valves to open proportionately, a second hydro-carbon inlet valve disposed adjacent said air valve, and mechanism connected with said air valve to force fuel through said respective hydro-carbon inlet valves under pressure.

6. In a carbureter, the combination with a casing provided with a mixing chamber, of a hydro-carbon inlet valve, a normally open air inlet port therefor, a normally closed air inlet valve, a hydro-carbon inlet valve mounted adjacentthereto and connected for simultaneous operation therewith, dash pot means connected with said air valve to force fuel through said respective hydro-carbon inlets with a sudden openin of said air valve, a throttle valve, and a justable connections between said first mentioned hydrocarbon inlet valve and said throttle valve to open the same proportionately with anopenin of said throttle valve In a carbureter, the combination with a casingfrovided with a mixing chamber, of a valve hydro-carbon inlet, a normally closed air inlet valve, a second hydro-carbon inlet positioned adjacent thereto, dash potmechanism connected with said air inlet valve and adapted under a sudden opening ofsaid air inlet valve to force fuel through said respective hydro-carbon inlets under pressure, a throttle valve, and adjustable connections between said throttle valve and said first mentioned hydro-carbon inlet valve to cause a proportionate opening of said inlet valve withian opening of the throttle valve.

8. The combination with a-carbureter and its needle and throttle valves, of a normally closed air valve controlling a passage to the mixing chamber of the carburetor, a cam connected on said throttle valve to actuate said needle valve, a dash pot chamber, a valved hydro-carbon inlet communicating therein, mechanical connections between said air valve and said hydro-carbon inlet valve ,to open said inlet valve with an opening of said air valve, said dash potmechanism acting to force fuel under pressure through said respective, needle and hydro-carbon inlet valves with an opening movement of said air valve.

9. In a carhureter, the combination with a throttle valve, a plurality of normally- .closed air inlet valves, a cam-actuated hydrocarbon needle valve, connections between the throttle valve and the needle valve to cause said needle valve to ,open proportionately with the openin of the throttlevalve, and a second hydrocar on inlet valve coiiperating with bothpf said inlet air valves to open therewith and operating independently of ,seidcamctuatedn ed Va 10. In a carburetor, a mixing chamber, a

cam actuated hydrocarbon inlet valve a normally closed spring actuated air va ve controlling an inlet passage to said mixing chamber, a hydro-carbon inlet adjacent thereto, connections between said throttle valve and the first mentioned hydro-carbon inlet valve to cause said valves to open proportionately with an opening of the throttle valve, and dash pot mechanism connected with said spring actuated air valve to force fuel under pressure through each of said respective hydro-carbon inlets with an opening of said air inlet valve.

11. In a carbureter, the combination of a casing provided with a main mixing chamber, an auxiliar mixing chamber communicating therewit a passage leading to said main mixing chamber and disposed oppositely from said auxiliary mixing chamber, hydro-carbon inlets one in said auxiliary mixing chamber and the other in said passage leadin to the main mixing chamber, a throttle va ve controlling the outlet from said main. mixing chamber, connections between said throttle valve and the hydro-carbon inlet in said auxiliary mixing chamber, a normally closed spring actuated air valve controlling the admission of air to said passage, and connections between said air valve and said second mentioned hydro-carbon inlet valve in said passage to cause an openi of the latter valve with an opening of sa id air valve.

12. In a device of the class described, a float feed chamber, a mixing chamber,v an air inlet chamber, a dash pot chamber, an inlet fuel valve mounted in said air inlet chamber communicating with said dash pot chamber, a hydro-carbon inlet valve'mounted to control the inlet of fuel from said float feed chamber to said mixing chamber, a throttle valve in said mixing chamber, and connections between said throttle valve and said second mentioned inlet valve to cause proportionate movement of each with a movement of the throttle valve,land an air valve mounted in said air inlet chamber adapted to actuate the hydro-carbon fuel inlet therein when said air valve-is opened.

13. In a device of-the class described, a mixingchamber, a float feed chamber,- a dash pot chamber in communication with said float feed chamber to. receive fueltherefrom, an air inlet chamber communicating with said mixing chamber, a hydro-carbon inlet valve mounted between said float feed chamber and said mixing chamber to admit fuel from the float chamber to the mixing chamber, a throttle valve in said mixing chamber, connections between said throttle valve and said hydro-carbon inlet valve to cause proportionate movementof the latter with the movement of the throttle valve, an air inlet valve mounted in said air. inlet chamber, a piston connected therewith and mounted in said dash 'pot chamber to aug ment the pressurein-said chamber-"and -in said float feed chamber with a sudden opening movement of said air valve, and a hydrocarbon inlet valve mounted in said air inlet chamber adapted for positive actuation by said air valve to receive fuel therethrough under pressure from said dash pot chamber with a sudden opening of the air valve.

14. In a device of the class described, a. mixing chamber, a float feed chamber, a dash pot chamber in communication with said float feed chamber to receive fuel therefrom, an air inlet chamber communicating with said mixing chamber, a hydro-carbon inlet valve mounted between said float feed chamber and said mixing chamber to admit fuel from the float chamber to the mixing chamber, an air inlet valve mounted in said air inlet chamber, a piston connected therewith and mounted in said dash pot chamber to augment the pressure therein and in said float feed chamber with a sudden opening movement of said air valve, a hydro-carbon inlet valve mounted in said air inlet chamher, and adjustable means on said air valve to actuate said latter inlet valve to admit fuel therethrough under pressure from said dash pot chamber with a sudden opening of the air valve.

15. In a device of the class described, a mixing chamber, a float feed chamber, a dash pot chamber in communication with said float feed chamber to receive fuel therefrom, an air inlet chamber communicating with said mixing chamber, a hydro-carbon inlet valve mounted between said float feed chamber and said mixing chamber to admit fuel from the float chamber to the mixing chamber, a throttle valve in said mixing chamber, an air inlet valve mounted in said air inlet chamber, a piston connected therewith and mounted in said dash pot chamber to augment the pressure therein and in said float feed chamber with a sudden opening movement of said air valve, and a hydrocarbon inlet valve mounted in said air inlet chamber adapted for positive actuation by said air valve to receive fuel therethrough under pressure from said dash pot chamber with a suddenopening of the air valve.

16. In a carbureter of the class described, two air inlet ports, one thereof having a constant opening of unvarying area, an automatically acting valve for the other of said ports normally closing the same, a fuel inlet adjacent each of said air'inlet ports, means operable by said valve for varying the area of one of saidfuel inlets, a cylinderand piston comprising a dash Jot adapted to supply fuel to one of said uel inlets, and means connecting the piston of said dash-pot with said valve to force fuel through said inlet when said valve is opened.

1'2. Ina earbureter having a mixing chambe'ryan air inlet of'constant area, and an auxiliary air inlet, the combination of a suction operated valve for automatically regulating the capacity of the auxiliary inlet, a fuel chamber having an outlet into the mixing chamber, a valve for said outlet operated with the suction valve for regulating the supply of fuel proportionately to the capacity of the auxiliary air inlet, an auxiliary fuel chamber, and a plunger there in operable with the suction operated air valve and fuel outlet valve to inject a sup,- ply of fuel into the mixing chamber.

18. In a carbureter of the class described, a carbureting chamber, air inlet ports therefor, a butterfly valve for one inlet port, an automatic valve mounted in the other air port normally closing the same and disposed at one side of said carbureting chamber, :1 Heat chamber for fuel, mechanism connecting the automatic valve and the butterfly valve whereby the automatic valve also automatically operates the butterfly valve, an auxiliary fuel chamber communicating with said float chamber and alinefl beneath said automatic valve, a piston in said auxiliary chamber, and means connecting said piston with said valve for momentary rise of the pressure of fuel in said auxiliary chamber with a sudden opening of said valve to which said piston isconnected.

19. In a carbureter of the class described, a mixing chamber, a plurality of air inlets therefor, fuel inlet means mounted adjacent each of said air inlets, one of said air inlets normally open and of constant area, the other of said inlets normally closed, means varying the area of discharge of-said fuel. inlet adjacent saidnormally closedlair. inlet, and dash-pot mechanism connected with said means to augment the pressure of fuel when said normally closed air inlet port is suddenly opened.

20. In a carburetor, a carbureting.chamher, two air ports, a butterfly valve for one side thereof, a suction operated valve for the other disposed at one side of said carbureting chamber out of alinement therewith, a float feed fuel supply chamber, an auxiliary fuel chamber disposed in ahnement wlth saidsu-ction operated valve and communicating with said float feedchamher, a piston in said auxiliary fuel chamber, a stem rigidly connecting saidpistcn: wind said suction valve for temporarilyraisinsg the pressure of fuel insaid auxiliary chimnber by a slight depression of said piston, and fuel supply nozzles inconmiunication with said float chamber and saidauxiliary chamber to discharge fuel for carburet-ing air in said carbureting chamber. 7

21. In a carburetor, two air ports, one having a constant unvarying dimension, a suction operated valve normally closing-the other air port, a fuel inlet for each of said air ports, means operable by said valve for the area cat ons of said fuel inlets,

a cylinder and piston affording a dash pot, and means connecting the piston of said dash-pot with said valve.

22. Ina carburetor of the class described, a casing affording a mixing chamber of L.-shape, an auxiliary chamber communicating'laterally in one side thereof, a normally open air port for said auxiliary chamber, a fuel inlet valve mounted therein, another casing member secured to said first-mentioned casing member, and the interior chamber in, said second casingregistering with the lower Lvextension of said mixing chamber, an automatic valve and dash-pot mounted: in said second-mentioned casing member, a fuel inlet valve mounted therein and connected for operation by said automatic valve, a float chamber for the carburerer, connections therchetween and with said firstemcnt-ioned fuel inlet, and communicationsl between said float chamber and said dash-pot and said fuel inlets to force fuel under pressure thereth rough when said automatic valve is suddenly opened.

23. In a carbureter of the class described, a casing, a mixing chamber of L-shape formed therein, another casing secured to said fii-st=menti0ned= casing and having a chamber therein registering with the L-extension of said mixing chamber, an auxiliary chamber formed in said first-mentioned casingtandcommunicating laterally in said mixingichalmber, a float chamber forming a part of said first-mentioned casing, a fuel inlet mounted in said auxiliary chamber and communicating with said float chamber, fuel inlet means mounted: in said second mentioned casing and communicating with said float chamber, and dash-potmechanism mounted: in saddsecond mentioned casing and connected to said fuel inlets and adapted! to open thciinlet of: second-mentioned-casing and totwgment the pressure through both of said fuel inlets.

In a carburetor of the class described, a casin havingla mixing chamber of L- shape 1: 1 rein, another casing secured-thereto havi achamber therein registering with' the' extension of said mixing chamher, a plurality of'fuel inlets for said'earbutcher, one mounted :in said first-mntioned casingand the other in said second-mentinned casing, airinlets for each of said fuel inlets, an automatic value for one of said air inlets, andmeans connected thereto to'augment the pressure inthe fuel source leading to said fuel inlets-when saidautomatic valve is suddenly opened.

25:. In a carburetor of the class described, a carbureting chamber, an air inlet thereto, a spring thrust motion controlled valvein said air: inlet, a dash got, a piston in said dash poh ai piston r0 8 rigidly connecting Said piston and Said air inlet valve, 9. fuel spray nozzle, means for: feeding fuel to said nozzle from said dash-pot from a point below the piston therein, a tapered valve to control the outflow from said nozzle, means for operatin said valve by said air valve, a float feed 0 amber for the earbureter, and communication between said float chamber and said dash-pot, and from beneath the piston in the dash-pot between said dashpot and said fuel nozzle.

26. In a carburetor of the class described, an air inlet, a suction operated air inlet valve therein, a dash-git, a piston in said dash-pot, a float feed el chamber for the carburetor in communication with said dasht, a fuel nozzle for the float feed cham' r, a. carbureting chamber, a fuel spray nozzle extending from the dash-pot into the carbureting chamber, and a tapered valve controlling the outflow from said nozzle, said valve disposed for operation by said air inlet valve and communicating with said dash-pot.

27. In a carbureter, a fuel suppl chamber, a throttle valve, an automatlcal y operat' air valve, fuel inlet means from said supp y chamber, se arate means controlled respectively by sai throttle and air valves for adjustin said fuel inlet means, each valve contro led means operating independently of the other in its control of the fuel supply, whereby the operation of either means will afford a continuous fuel supply, and a secondary air valve connected for automatic operation by said automatic air valve.

28. In a carburetor, a plurality of fuel nozzles, independent means for controlling said fuel nozzles, a throttle valve, a manually operated mechanism adapted simultaneously to adjust the throttle valve and one of said nozzle controlling means, an automatically operated air valve, a second air valve, and means operated by said automatic air valve for operating the other nozzle controlling means as Well as said second air valve.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

CHARLES L. RAYFIELD.

Witn:

mums W. HILLS, Jr., FRANK K. HUDSON.

Copies 0! this potent may be obtained to: Ive cents each, by the "commissioner o! ratentl, wuhlngtu, D- G.

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