US1207224A - Carbureter. - Google Patents

Description

Patent Dec. 5, i916. 2 nSHEEaL-SHEFT i @9% C. SCHLAYER.

CARBURETER.

APPLICATION FILED DEC. 25. 1912.

Patented Dee. 5, 19H5.

narran strains CHARLES SCHLAYER, F NEW YQRK, Y., ASSGNGR 0F ONE-HALF T0 CHRTJS W. JACB, OF NEW YGRK, N. Y.

CBBURETER.

Application led December 26, 1912.

To all whom t may concern Be it known that l, CHARLns SonnArnr., a citizen of the United States, residing 1n the borough of .Manhattam in the city, county,

and State of New York, have invented certain new and useful improvements in Carbureters, of Whichthe following is a specification, reference being had therein to the accompanying drawings, which form a part thereof. n

My invention relates 'to carbureters and more particularly to a type of suction carbureters.

The main object of the invention is to provide a carbureter wherein the liquid hydrocarbon and air passing therethrough are brought into such intimate relation as to insure a. thorough admixture thereof one with the other and any stratification of either is prevented, thus insuring uniformity throughout practically the entire volume of the mixture delivered to the engine, or other point of consumption.

A. further ob 'ect is to provide a carbureter wherein the volume of mixture delivered by the carbureter may be controlled, independently of the suction producing means, and the volume of air entering the carbureter will be simultaneously varied in proportion to the volume of mixture bcing delivered.

A still further object is to provide a carbureter wherein air entering the carbureter will have imparted thereto a swirling motion as it meets and lirst associates with, the vaporized liquid hydrocarbon, and the resulting mixture will be given a swirling motion, either as to the whole. or an ellcctive portion of the volume thereof, to pre-- vent stratification of the vaporized hydrocarbon or air and secure a highly explosive mixture without an excess ot the hydrocaru bon, or globules thereofnot combined with the proper volume of air, thus not. only insuring reasonable uniformity in 'the quality of the mixture, but economy in the opera tion of the carburetor and greater lll. l).

- per gallon of fluid hydrocarbon.v

A still further object is to provide a carburetor wherein with an increased trequency of the suction impulses, and a re Specification of Letters Eatent.

Serial No. 738,553.

sultant proportionate lowering -oii the presratentec nee. a, raie.

sures Within 'the mixing chambers and in crease in the volume of vaporized hydrecar-A bon delivered to said chamber, supplemental air delivery ports will become operative to increase the volume o'li air delivered to the mixing chamber, which air will be delivered in such manner and volume as to insure its combining with all portions of the mixture.

A still further object is to provide a carbureter wherein variance in the volume -of liquid hydrocarbon delivered, will be determined by the eHective suction applied at the delivery end 'of the spraying nozzle and variance in the volume of air will loe controlled in large measure by a mechanism controlled by the operator.

A still further object is to provide a carbureter wherein the mixture receives a sequence of swirling motions while passing therethrough, the direction of succeeding motions being reversed to avoid any tendency of the formation of lixed courses Jfor the hydrocarbon or air.

A still further object is to provide a earbureter wherein the float chamber may be readily detached from the mixing chamber,

thus permitting repairs of said chamber without necessitating the disconnection of the said mixing chamber. v A

A, still further object is to provide a carbureter wherein a choke faire is provided for controlling the volume of the` mixture delivered, 'the actuation of this valve causing simultaneous actuation oit the air intake con trol ling mechanism.

still further object is to pro bureter wherein the valve conti t the delivery olii the spraying nozzle may be set to any desired capacity and the air intake controlling mechanism may be set to insure the delivery oit a proportionate volume of air when any given suction is applied to the carbureter.

A still further object is to provide a cerf being drawn from the carbureter, or the rate of lioiv of the mixture tothe point of consumption.

A still further object is to provide a carbureter having a head flange which may he adjusted circumferentially of the mixing chamber, to permit the convenient adjustment of the carbureter to a manifold inlet head. And a still further object is to provide a carbureter for securing a thorough agitation and admixture of the liquid hydrocarbon and air wherein the agitating and mixing means will be so disposed as to avoid retardation of the flow of the mixture. and will not limit the capacity of the olftake or be subject to disarrangement or Wear.

The invention consists in such novel features of construction and combination of parts as are hereinafter set forth and described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings z-Figure l is a side elevation of a carburetor, embodying my invention; Fig. 2 is a similar view of the other side of the carhureter; Fig. 3 is a vertical section of a carbureter with the float chamber in elevation; Fig. 4 is a detail view of the air intake control mechanism; Fig. 5 is a detail view of the expanding air duct; Fig. 6 is a detail view of the auxiliary.

air intake ports and distributer; Fig. 7 is a top view of the auxiliary air intake section; Fig. 8 is a top view of the carbureter illustrating in dotted lines the adjustment of the head flange. and Fig. 9 is a detail view of the `adjustable stop mechanism of the throttle control for controlling the minimum and maximum air capacity of the air intake mechanism. Fig. 10 is a detail view of the air damper. v

Like letters refer to like parts throughout the several views.

Heretofore to secure a more thorough admixture of the hydrocarbon and air entering into an explosive mixture, it has been a common expedient to introduce a` rotary memberin the mixing chamber or in an engine manifold, which member was actuated by the flow of the mixture itself. This has proven more or less effective, but the constructions employed have always had the effect of retarding the flow to an extent determined by the dimensions and arrangement of this member. It has also been a common expedient to provide an auxiliary valve controlled air port for delivering a jet of air beyond the spraying nozzle which became operative when the engine was running at high speed. I have found. however, that the air delivered through this auxiliary port has a tendency to dilute only that portion of the mixture flowing2 across the discharge end of the port, thus failing to supply all cylinders of an engine with an explosive mixture having the same relative proportions of hydrocarbon and air, thus resulting in a material loss of engine etliciency. Neither of the expedients above referred to have secured the results sought, that is a thorough admixturc of the hydrocarbon and air, and a preservation of the desired proportions of such, irrespective of the rate of flow to the engine due to varying engine speeds.

By the herein described construction, I aim to secure a sutlicieiitly thorough adinixture of the hydrocarbon and air to admit of the close setting of the carbureter for determining the proportions of hydrocarbon and air, and preserving such proportions, or varying them to sucli an extent as to meet the requirements of the engine at different speeds.

In the embodiment of the invention shown in the drawings, I have shown a casing r1., through which the hyd roca rboii and air pass and are mixed. This easing is preferably cylindrical in cross section. and one open end thereof rfscrves as an air intake port, and the other open end a2 thereof serves as an explosive mixture ofi'take port, means as the head flange a3 being provided to facilitate the coupling of the carburetor to the engine manifold or a conduit leading thereto, (not shown).

Biscliarging within the casing a, is a spraying nozzle l), the discharge port of which is controlled by a needle valve b1. Liquid hydrocarbon may be supplied said spraying nozzle in any desired manner, that shown and preferred being an ordinary float chamber c to which hydrocarbon is delivered through the supply pipe c. That portion of the casing a adjacent the air intake port a', is constricted by means of a fitting d carrying a mixing tube or air duct to be more specifically referred to hereinafter. To vary the capacity of this tube or duct, I so construct it that it may be expanded or contracted according to the rate of flow of the explosive mixture from the carbureter, and provide means whereby it may be actuated to vary the air supply. Beyond the discharge end of the said tube or duct, I provide the inner wall of the casing n. with a series of longitudinally extending helical or curved tongues c forming therebetween a series of similarly and laterally pitched channels, the purpose of which is to inipart to the flowing mixture a` swirling inotioii. Preferably I also provide a second series of such tongues f spaced away from the tongues c and being pitched reversely, thereto, both longitudinally and laterally thus tending to more thoroughly agitate and mix the hvdroearhon and air. The swirling inoion will all'ecl the entire volume of the mixture passing through the carburetor, and not only prevent any stratification, but permit such setting of the spraying nozzle and tube or duct.

Lacasse air intake to secure a closer approximation of the proper proportions of hydrocarbon and air, with a resultant uniform richness of the mixture at any engine speed. To insure greater efficiency in mixing the hydro carbon and air, l also provide the mixing tube or duct with similar helical or curved tongues thus causing the air to have a swirling motion when it irst commingles with the hydrocarbon spray leaving the nozzle b. Mounted in a fixed relation to the casing a is an annular fitting g by means of which the mechanism for controlling the volume .ot air entering into the mixture is actuated.

To maintain as nearly as possible the proportion of hydrocarbon and air entering into the mixture at the higher engine speeds, I provide an auxiliary air intake comprising a series of ports g1 in the itting g, which ports are arranged circumferentially about and above the discharge end of the mixing These ports, to insure the rapid thorough admixture of the auxiliary air supply with the mixture flowing 'from said tube or duct, communicate with the interior of said casing through a series of helical or curved grooves or channels formed by the tongues it, the pitch ot these tongues preferably being the reverse of that of the tongues within said tube or duct. The ports g are opened and closed by a sliding gate z', the movement of which controls the capacity of the mixing tube or. duct. Hence the delivery of the auxiliary air supply is timed to conform to the volume of air being delivered through the main air supply duct. The gate has a series of longitudinal chan nels 1 therein (see Fig. 4) preferably correspondingin number with the ports g1, the lower or intake end of these channels being open to atmosphere and the upper or diss charge end being controlled by an annular valve plate y', which seats upon the top of said gate under the spring j bearing upon a, xed shoulder Within the casing 'on A damper plate ,1'2 limits the intake oi said channels 1. rThe fitting d is provided with an annular channel shown more paiticularly in Fig. 3, in which is'seated one end of a plurality of overlapping shutters te constituting the mixing tube or duct hereinbcfore referred to. bearing which seats upon the edge of the channel, the shutters having av normal tendency to .open under the tension of the coiled spring lo acting thereon below said bearing. The adjacent edges of the different shutters l; are so constructed as to overlap when the tube or duct is set for its lowest capacity (ses Figs. 4- and 5).

The fitting g is provided with an annular cam Z adapted to .engage the top of the shutters c and close them against the tension of thespring k' when the carbureter is set forilow rate offlovv. This ittingis'also These shutters each have a` provided with a pendant flange g2 for limiting the extent of expansion of the shutters It and defining the maximum capacity of the mixing tube or duct composed of said shutters r.

The fitting (l and the gate c' are so united as to be capable of simultaneous reciprocatory movement in the casing' a by means of the throttle mechanism to be described.

l'nasmuch as the volume of hydrocarbon delivered by the nozzle l) will be determined by the pressure Within the mixing chamber, and as with higher speeds, this pressure will be lower than with lower engine speeds, the capacity of this nozzle need not be varied to secure the desired proportions of hydrocarbon in the mixture at the higher speeds.r Higher efficiency vmay be secured by allowA ing the volume of hydrocarbon to be determined solely by the changes in the pressures Within the mixingr chamber, the auxiliary air supply being utilized to dilute the mix ture at the higher speeds, and equalize pressures, because of tendency toward an excess of the hydrocarbon in the mixture. The stem b', however, is made adjustable as shown, to permit the nozzle to be set when installing the carburetor.

Mounted in the casing a adjacent to the oltake a? thereof is' a butteriy valve m adapted to control the rate of flow through and limitthe capacity of the carburetor to the demands of the source of consumption. This valve is carried by a shaft m projecting through the casing a and carrying at each end thereof an eccentric n adapted, with the actuation of said valve m, to actuate the expanding mixing tube or duct and the gate z' to vary the volume of air passing therethrough proportionately to the rate of flow determined by said valve m. Suitable connecting means between the said eccentrics a and the trunnions 2 on the gate i, are provided, such `means comprising the links ohfnvone end of which respectively is mounted upon its trunnion, and the other end oi which is provided with a laterally enlarged strap o-p adapted to be engaged by said eccentrics. Guide plates 02--722 mounted on said shaft hold said straps in the proper alineinent. Suitable guide slots for the trunnions t2 are provided in the casing a. A

A crank arm g is mounted upon the shaft of the valvem and adapted to be connected with the throttle lever not shown. The spring r acting onthe arm r also carried by said valve shaft, acts to restore all parts to normal. rllhe spring 's actingupon either link o-p servesgtr'i hold both strapsin engagement with, their eocentrics. named spring acts against a seat s on the casing c and a seat carried by its link yTo limit the minimum aiid maximnm ca- `pacity of the oitakewomthrouahthesvalve This last m I provide the adjustable stops t-t1 on the casing a, adapted to be engaged by the projection t2 carried bythe shaft of and movable with the valve m..

To afford al circumferential adjustment of the head flange a3, I -make the tongues f ina cylinder u having a screw threaded connection with the casing a. This cylinder has a fiange u1 adapted to seat in a countersink in said head iiange and force it against Athe annular shoulder u? upon the casing a.

Carried by the casing a is a downwardly opening keeper v adapted to receive a tongue 'nl on the tank c and be locked therein by the bolt fue, the nozzle b being supported by the elbow pipe o in order to permit the simultaneous removal of the float tank o and nozzle for purposes of cleaning or repair.

The operation of the herein described carbureter is substantially as follows: The needle valve b andthe stops t-t are first adjusted to secure the proper relative minimum quantities of hydrocarbon and air entering into the mixture. This maybe readily acconiplisliedas the needle valve b has its end exposed below the casing a, and the said stops are arranged exteriorly of said casing. When in operation the automatic variance of the pressure about and beyond the discharge end ot' the spraying nozzle controlled by the rate 'of flow of the mixture from the mixing chamber as determined by the rate of consumption of the mixture, will simultaneously vary the volume of air drawn through the mixing tube or duct 7c, the auxiliary air supply becoming operative only when the maximum capacity of the said tube does not admit a volume of ai-r proportionate to the volume of hydrocarbon issuing in the form of spray from the said nozzle After setting the Valve b and stops t t', the carbiireter should be brought to its greatest capacity and the damper plate 7'2 set to define the maximum capacity ot the channels l to insure the delivery of the proper volume of air with the actuation of the auxiliary air supply system. By thus adjusting l the carbiireter, the proportion of hydrocarbon is determined solely by the rate of How of the mixture, or the pressure within the carebureter which is determined in part by the engine speed and in part by the valve m.

When in opeiation at low engine speeds, the lever q is actuated to simultaneously turn the valve m to reduce the volume of mixture passing from the off-take a.2 and through the links o p, to raise the fitting d and gate This will foice the top of the shutter Z: into engagement with the cam Z to contract the tube to its lowest capacity. and cause the gate i to close the auxiliary air ports, g. While the intake capacity of the mixing tube or duct remains constant cach shutter lo as to its inner face is curved as shown, so as to have depth and aids in imparting to the entire volume of air this swirling motion through the lateral direction of the air current K That reduction in pressure within the upper portion which results in the setting up of the current of air through the mixing tube, simultaneously, and in '-.the usual manner, causes the liquid hydrocarbon to be sprayedfrom the nozzle so as to be commingled with the incoming airf This mixture after leaving the mixing tube is expanded into the mixing chamber and passes within the ring of tongues c. from which it receives a swirling motion in `a direction. opposite to' that imparted thereto by means ot the tongues k2, a. portion of the mixture being directed toward the axis of the casing a by the lateral pitch of the bottoms of the channels between the said tongues e. This swirling motion and the cross currents, servefto thoroughly mix the hydrocarbon spray and air and at the same time avoid any possibility of a stratification of either. The valve m, by limiting the capacity of the mixing chamber adjacent thereto, will correspondingly vary the volume of mixture passing through the off-take a2 and hence control the rate of 'fiow and the pressure within the mixing chamber, which in turn will determine the proportions of hydrocarbon and air entering into the mixture. That portion of the mixture passing through the off-take a2, receives a final swirl from the tongues f, the lateral pitch of the channels between which will set up cross currents toward the axis of the casing a in the manner heretofore referred to in connection with the tongues k2 and e, the direction of the swirlin motion, however, being the reverse of that eveloped b v the tongues e.

lnasmuch as the spray leaving the nozzle has a swirling motion due to the rapid impulses to which the mixture in the mixing chamber is subjected, the hydrocarbon andthe air. and the mixture thereof, will be constantly agitated in passing through the carburetor. This will insure a sufliciently thorough admixtiire of the hydrocarbon and air to insure a highly explosive mixture, and by preventing an excess of hydrocarbon in any pai-t of the mixture. permit a closer approximation in the setting of the Aspraying Lacanau nozzle to secure the proper proportion thereof entering into the mixture. This not only eiiects a saving of hydrocarbon, but higher engine efliciency is secured as all cylinders will receive a mixture of substantially the same richness. v'With the swirling action, the reversal thereof and the development of cross currents stratiiication is pracy tically impossible.

vIt() When increased capacity is demanded, the valve m is opened to the desired extent, thus increasing the rate of dow, with a proportionate reduction of pressure Within the mixing chamber and a consequent proportionate increase of the lioW o't' hydrocarbon and air from the nozzle Z2, and through the mixing tube or duct, respectively. Y Simultaneously with theopening of the valve m the eccentrics n on its shaft m Will, through the straps 0-p and links o p lower the gate c' and the mixing' tube or duct. With this movement the tops ol the shut ters fl; will be forced outwardly by the spring it', the cam Z defining the extent of this opening. Hence the capacity of the said mixing tube Will be increased although its intake capacity remains constant. the same time, the movement of the gate Will open the ports g proportionately to the extent of movement of the gate and throttle valve. This merely results in a proportionate increase ot hydrocarbon and 'air in a volume determined by the rate ot consumption or `dow ot' the mixture.

lf the valve m, gate i and the mixing tube be adjusted to their maximum capacity, as when an engine is running at high speed, the reduction of pressure Within the mixing chamber Will be so great that the air re-V quired will be in excess oit the capacity of the mixing tube. Under such conditions the valve, plate j will be unseated against the tension of its spring j and thus simultaneously deliver air to the mixture leaving the mixing tube or duct, at all points about the Wall ol the mixing chamber. The air passing through the ports g is delivered into the mixing chamber through the channels formed by the tongues @the longitudinal and lat-k eral pitch of these channels causing a svvirling motion and cross currents similar to those caused by the tongues e, f and 7;". This manner of' delivering the auxiliary air supply not only insures the dilution of the mixture, but prevents the dilution ol only that portion thereof adjacent to the point K l hydrocarbon thereto, a mixing chamber havof delivery of the auxiliary air supply. This delivery of the auxiliary air supply at ber preserves the uniform dilution of the mixture, and causes each cylinder ot an engine run ing at high speed to reserve a mix Y' ture ot trie same richness. The lever r and spring 'r have a normal tendency to open the valve m.

ducing the effective capacity of the carburetor. The agitation is secured Without the raid of moving parts, and the action is continuous. There may be a variance in the velocity of the flow through the unobstructed central portion of the casing a and of the flow adjacent said casing, but with the swirling of the mixture, a tendency toward such would be minimized although any such variance would merely tend to accentuate the .cross currents and aid in securing the desired thorough admixture of the Ahydro-v carbon and air.

When helicalor curved tongues are used about the wall of the casing, there is little or no tendency toward condensation of the hydrocarbon, or the removal of the heavier particles ot hydrocarbon through ceutrifugal action.

The adjustment oit thehead Harige a3 and the. removal of the float chamber may be readily accomplished and will permit the attachment of the carburetor to manifolds or pipes, without material changes, or the removal of the lioat tank and spraying nozzle Without disturbing the remaining portions ot the carburetor.

vIt is not my intention to limit the invention to the details of construction shown in the drawings, it being apparent that such may be varied Without departing from the spirit and scope of the invention.

Having described the invention, what l claim as new and desire to have protected by Letters Patent is l. A carburetor embodying therein spraying nozzle, means delivering liquid hydrocarbon thereto,v a mixing chamber ha 2 ing an oiitake port leading therefrom, an airl intakel communicating therewith, means adjacent the Wall of said chamber and the discharge end of said air intake whereby the mixture has a whirling motion in one direction imparted thereto, and means adjacent said odtalre arranged adjacent the lWalls of said chamber, whereby said mixture has a whirling motion in the opposite ing an oltake port leading therefrom, an

a number of points about the mixing Chaim air intake communicating therewith, a pluhas a swirling motion in one direction imparted thereto, and a plurality ot helical or curved tongues adjacent the wall of said ing tube surrounding said nozzle, means whereby said tube may be expanded and contracted to vary the volume of air delivered to said mixing chamber, and means vcarried by said tube whereby a swirling motion is imparted to the air passing therethrough.

4. A carbureter .embodying therein amix- Aing tube comprising a plurality of movable shutters,'pivotally supported adjacent the intake end thereof, a spring acting thereon having a normal tendency to separate the other end thereof, a cam adapted to engage and close said shutters against the tension of said spring, and means whereby the relative position of said shutters and said cam may be varied to control the capacity of said tube.

5. A carbureter embodying therein a spraying nozzle having a discharge port of xed capacity, a mixing chamber having an oftake port leading therefrom, an adjustable valve controlling the rate of flow of the mixture through said mixing chamber and the pressure about said nozzle, a reciprocatory', expansible mixing tube having a fixed intake capacity, means adapted with the reciprocation of said tube to vary its capacity adjacent said nozzle whereby the volume of air passsing through said tube and the pressure about said nozzle may be simultaneously and inversely varied to cause a proportionate'increase or decrease in the volumeo'lf air and hydrocarbon entering said mixing chamber, and connections between said valve and said-tube .whereby they are simultaneously actuated to proportion the Icapacity of said tube to the rate ofyflow of the mixture. p

6, A carburetor embodying therein a spraying nozzle having a discharge port of fixed capacity, a mixing chamber having an oiitake port leading therefrom, a rotary valve within said mixing chamber controle ling the rate of 'low of the mixture through said mixing chamber and the pressure about said nozzle, a reciprocatory, expansible mix in tube havinO a fixed intake ca aeit 1 means adaptedl with. the reciprocation of said tube to vvary its capacity adjacent to said nozzle whereby the volume oil air passing through said tube and the pressure about said nozzle may be'simultaneously andinverscly varied to cause a proportionate increase -or decrease in the volume of airand hydrocarbon entering the mixing chamber, reoiprocatory links, connections between said links and said tube, yand an eccentric and strap connection betweensaid links reA spectively, and the shaft of said rotary valve, whereby said valve and said tube will be simultaneously actuated to proportion the capacity of said tube to the rate of flow of the mixture.

7. A carbureter embodying therein spraying nozzle having a discharge port of lixed capacity, a mixing chamber having an oitake port leading therefrom, a rotary valve within said mixing chamber controlling the rate of How of the mixture through said mixing chamber and the pressure about said nozzle, a reciprocatory, expansiblc mixing tube having a fixed intake capacity, means adapted with the reciproeation of said tube to vary its capacity adjacent to said nozzle whereby the volume of air passing through said tube and the pressure about said nozzle may be simultaneously and inversely varied to cause a. proportionate increase or decrease in the volume of air and hydrocarbon entering the mixing chamber, reciprocatory links, connections between said links and said tube, eccentric and strap connections between said links respectively, and the shaft of said rotary valve whereby said valve and said tube will be simultaneously actuated to proportion the capacity of said tube to the ate of flow ofthe mixture, adjustable stops and a projection carried by the shaft of said valve whereby the maximum or minimum adjustment of said valve and said tube may be regulated.

8. A carburetor embodying therein a spraying nozzle having a discharge port of fixed capacity, a mixing chamber having an oftake port leading therefrom, means controlling the rate of flow of the mixture through said oltake port and the pressure about said nozzle, a mixing tube surrounding said nozzle having a fixed intake capacity, means varying the capacity of said tube adjacent the discharge port of said nozzle whereby the volume of air passing through said tube and the pressure about said nozzle may be inversely varied to cause a proportionate increase or decrease in the volume of air and hydrocarbon enteringsaid mixing' chamber, and means whereby an auxiliary air supply may be discharged into said mixing chamber to preserve the proportions of air and hydrocarbon entering said chamber, comprising a port opening into said chamber adjacent to the discharge end of said mixing tube, a gate normally closing said port and having air ducts therein, and an automatically acting valve controlling said ducts.

9. A carburcter embodying therein a Aspraying nozzle having a discharge port of ixcdcapacity, a mixing chamber havingr inumana an odtake port leading therefrom, an adjustable valve controlling the rate of How of the mixture through said mixing chamber and the pressure about said nozzle, a reciprocatory, expansible mixing, tube having a fixed intake capacity, means adapted with the reciprocation' of said tube to vary its capacity adjacent said nozzle whereby the volume of air passing through said tube and the pressure about said nozzle may be simultaneously and inversely varied to cause a proportionate increase or decrease lin the volume of air and hydrocarbon entering said mixing chamber, connections between said valve andsaid tube whereby theyare simultaneously actuated to proportion the capacity oi said tube to the rate of flow of the mixture, and means whereby an auxiliary air supply may be discharged into said mixing ychamber to preserve the proportions of air and hydrocarbon entering said chamber, comprising a port opening .into said chamber adjacent to the discharge end of said mixing tube, a gate carried by and reciprocating with said tube normally closing said port and having air ducts therein, and an automatically acting valve controlling said ports.

l0. A carburetor embodying therein a spraying nozzle having a dischargeport of fixed capacity, a mixing chamber having an offtake port leading therefrom, an adjustable valve controlling the rateof flow of the mixture through said mixing chamber and the pressure about said nozzle, a'reciprocatory, expansible mixing tube having a, ixed intake capacity, means adapted with the reciprocation of said tube to vary its i' capacity adjacent said nozzle whereby the volume of air passing through said tube and the pressure about said nozzle may be simultaneously and inversely varied to cause a proportionate `increase or decrease in the volume of air and hydrocarbon entering .said mixing chamber, connections between said valve and saidtubev whereby they are simultaneously actuated to proportion the lcapacity of said tube to the rate Iitlow of the mixture, and means whereby in auxiliary air supply may be discharged into said mixing chamber to preserve the pro portions ot'. air and hydrocarbon entering said chamber, comprising a port opening into said chamber adjacent to the discharge end of said mixing tube, a gate carried by and reciprocating with said tube normally closing said port and having air duets therein, an automatically acting valve controlling said ports and an adjustable damper adapted to regulate the intake capacity of said ducts.l e

11. A carbureter embodying therein a spraying nozzle, a mixing chamber6H into which said nozzle discharges, a mixing tube delivering air about said nozzle, and aux-f iliary air supply means including therein a' plurality of ports divergently arranged about the wall of said mixing chamberfa reciprocating gate having a plurality of air channels therein each adapted to deliver air to one of said' ports, an annular valve plate, a spring acting thereon to normally seat same to close said channels, and means adapted to simultaneously vary the capacityji of said mixing tube and reciprocate 'said 75 gate to bring` said valve plate into operative position. y, l l2. A. carburetor embodying therein al spraying nozzle, a mixing chamber into which said nozzle discharges, a mixing tube delivering air about said nozzle, und auxiliary air supply means including therein a. plurality ot' ports divergently arranged about the wall of said mixing chamber, a recipro eating gate having a plurality of air chan- 35 nels therein, each adapted to deliver air to one of said ports, an annular valve plate, a spring acting thereon to normally seat same'A to clbse said channels, means ada ted to multaneously vary the capacity o said mix-v 9 ingv tube and reciprocate said gate to brin said valve plate into operative position," n y' an adjustable damper plate controlling he inlet to said channels. if

13. A carbureter embodying therein a spraying nozzle, means delivering liquid hydrocarbon thereto, a mixing chamber having an oil'talre port leading therefrom, an air intake communicating therewith, means adjacent the' wall of said chamber whereby 100 the centra-l portion of said chamber is unobstructed and the mixture passing through said chamber has a swirling motion imparted thereto, and auxiliary air supply means including therein a plurality of ports arranged divergently about the wall of said mixing chamber, a series of helical or curved tongues forming channels' between said ports and said mixing chamber, means whereby each of said ports is in communi- 110,.

cation with a source of air supply, and means simultaneously controlling the dow of air through all of said ports.

le. A carbureter embodying therein a. spraying nozzle, means delivering liquid hydrocarbonthereto, a mixing chamber having an oiitalre port leading therefrom, an air intake communicating therewith, means adjacent the wall oi said chamber and the discharge end of said air intake whereb the mixture has a swirling motion ijtone irection imparted thereto, means adjacent said otftake arranged adjacent the walls of said chamber whereby said mixture has a swirling motion in the opposite direction mparted thereto, the central portion of Said chamber being unobstructed by said means, and auxiliary air supply means including therein a plurality of ports divergently arranged about the wall of said mixing chamber, a series of helical or curved tongues forming channels between said ports and said mixing chamber, means whereby each of said ports is in communication with a source of air supply, and means simultaneously controlling the flow of air through all of said ports.

.15. A arbureter embodying therein a spraying nozzle, means delivering hydroimparted to the mixture passing throughA sald chamber, and auxiliary air supply means including therein a plurality of di- Vergently arranged ports about the wall of said chamber, means imparting a swirling motion tothe air passing through said ports, the 'direction of which motion is the reverse of that imparted by said mixing tube, means whereby each of said ports is in communication with a source of air supply, and means simultaneously controlling the flow of air through all of said ports.

16. A carbureter embodying therein a mixing tube, and agitatin means comprising a plurality of longitudinally extending helical tongues arranged about the axis of said tube and forming a series of channels adjacent the Wall thereof, the bottom of said channels being pitched1 axially and inwardly of said tube in the direction of the flow of the mixture therethrough whereby a swirling motion is imparted to the gaseous matter owing adjacent the said tongues and lateral or cross-currents are set up within said tube.

In witness whereof I havehereunto affixed my signature this 21st day of vDecember, 1912, before two Witnesses. 4

CHARLES SCHLAYER.

Witnesses:

FRANK T. WENTwonTn. D'rm Munn.

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