USRE14780E - Carbureter - Google Patents

Description

CARBURETER.

APPLICATION FILED JUNE 23,1919.

Reissued Dec. 80, 1919. I 14,780.

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F. H. AND F. 0. BALL.

CAHBUREIR.

APPLICATION FILED JUNE 23.1919.

Reissued Dec. 30, 1919. 14,780.

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FBANKYH. BALL AND FREDERICK 0. IBALL, OF DETROIT, MICIGAN, ASSIGNORS T0 BALL & BALL CARBURETOR COMPANY, OF DETROIT, MICHIGAN, `A CORPORATION OF MICHIGAN.

' filed June 23, 1919.

States, residing at Detroit, in the county of lVayne and State of Michigan, have in- -v'ent'ed new and vuseful Improvements 1n -Carbureters, of which the following 1s a specification.

This invention relates to carbur'eters and consists in certain lmprovements 1n the construction thereof as will be hereinafter fully described and pointed out in the claims.

The invention is illustrated in the accompanying drawings Aas follows:-

. Figure 1 shows a section through the carbureter on the lines 1-1 in Figs. 3 and 4.

Fig. 2 a section on the lines 2-2 in Figs. 3' and 5.

'Fig 3 a plan view of the carbureter.

Fig. 4 an elevation of the carbureter.

'Fig. 5 an elevation of the carbureter7 the point of View being at right angles to that shown in Fig. 4f,v

A The carbureter is formed of two main parts, 1 the bodyhaving the Acontrolling devices including themixing chamber and 2 the float chamber with-its parts. Part'l has the mixing chamber 3 at the upper end v. of which 'there is arranged a throttle 4.

-The throttle 4 is in the form of a butterfiy valve mounted on the stem 4a which extends to without the body 1. A controlling lever 5 is fixed on the stem 4a and any convenient means (not shown) for controlling the throttle extends from the lever 5.

The fuel is supplied to the. mixing chamber through the nozzle 6. The nozzle is arranged in a nozzle fitting 7 in the form of ascrew having the passage 9. The fitting 7 is screwed into the nozzle passage 8, this passage having a stepped opening, the opening of smaller diameter receiving the fitting '7 and that part of larger diameter being.

' 0f sufficient size to receive the head of the screw. A plug 10 is screwed into ,the larger diameter of the nozzlepassage.- It has a central opening 11 extending downwardly from its top and this is connected by a re- CARBURETER.

Specification of Reissued Letters Patent. Reissued Dec, 30', 1919.

Original No. 1,269,576, dated Iune 18, 1918, Serial No. 53,898, filed October 4, 1915. Application for reissue` Serial No. 306,217.

passage 13. The horizontal passage 14 communicates with the` lower end of a tubular chamber 15. yThe lower end of the-tubular chamber 15 is closed by a plug 16 which has "a reduced portion forming an annular passage 17. The plug 1.6 is screwed into the annular chamber 15, t screw threaded portion being above the horizontal passage 14 so that the annular passage 17 forms a means of communication but the upper part ofthe chamber 15 is separated from the main 'body of this passage. The float chamber 2 has a projection 18 with an opening through it of the same size and registeringlwith'the bottom of the tubular chamber 15 and the.

screw plug 16 extends throughthis o j ning" thus clamping the projection on the ttbm of the body 1 thusforming a means ofcounection between the two main parts *of the carbureter. The passageA 19 extends from the bottom of the float chamber tothe opening in the projection 18 and forms a means of communication between the float chamberand the annular passage 17. It will be ber is in direct connection with the nozzle and that the level of fuel at the nozzle will be that maintained by the float in the float chamber.

The flow of fuel .to the float chamber is controlled by` the needle valve 20 acting on the valve seat 21. The valve seat is arranged in a screw plug 22 having the axial passage 23. The screw plug extends into a screw threaded projection 2 on the bottom of the Hoat chamber. The valve stem 31- extends through a guide at the top ofthe screw plug and the axial passage in the screw plug is connected with the float chamber by the radial passages 26. The float 27 is slidingly mounted on the stem 31 and operates against the weighted levers 28. These levers are pivoted between the ears29 and engage a spool 30 fixed on the stem 31.l The ears 29 extend downwardly from a removable cover 32 and the stem extends upwardly through the cover and into a removable cap 33.

Fuel is delivered to the inlet passage 34 from any convenient source of supply. The inlet passage is in a projection extending from the sleeve 35. The sleeve 35 is clamped on the bottom of the fioat chamber bymeans of the internally screw threaded plug 37 which is screwed onto the projection 24.

The screw 37 has. ,an axial. opening 38 Y communicating with the passage leading to the float chamber and'radial openings M39. It has anl .annular groove 40 extending around it andfthe sleevel has an annular `groove 36 around it, these grooves forming a chamber. .A strainer 41 is arranged over the screw 37 taking an intermediate position in the chamberformed by the grooves and 36. It will be readily seen that the gasolene l is strained by this strainer and that by its 'the passage 44. 1 The 'head 46 of the screw plug 43 seats on the bottom of the screw plug 16 around the opening 42 thus making a .r closure. A slight backing off of the screw 43 forms a passage between the head 46 andl the bottom of the screw 16 thus forming a means for draining the passages and float chamber. Anair passage 47 is arranged around the nozzlefand forms an initial air passage leadj j ing'to th'emixing chamber.

The passage is so arranged that the air passing through.' it

' takes up the fuel from the nozzle 6.-, The

air led through the passage 47 is taken from the passage 48 and the secondary air passage 49 extends from: the passage 48 to the mixing. chamber 3. The assage 49 has an extension 50 of lar er dlameter than the passage properan the passage 50 is surrounded by a seat 51j-on which the air valve 52 rests. The air valve is slidingly mounted on the 53 carriediby the adjustable nut 54. Av

rsp-'ring 55 extends between the nut 54 and -the valve 52 andresists the opening of the valve 52'. The spring may be adjusted by screw'- i' ing lthenut 54 In and out as desired. A pin 56 vis arranged-in the end of the pin 53 and preventsthe escape ofthe valve 52 from the in 53 when the nut- 54 is -entirely removed the body of the carbureter. The large 1 valve 52 with the extension 50 on the pas- A sage 49 limits the. influence of the valve on the flow of air to Aa very short/period during the initial Vopening of this valve. In the later stages of the operation of this carbuvreter the How of air for all practical purposes is controlled by the size of the opening 49 so that in these later stages the carvbureter operates largely as one having tixed orifices or passages for the air and fuel.

The extent of the control ofthe air by the valve may be varied bythe nut 54.

l. variation in quality is accomplished by the Air is delivered to the passage 48 through an opening 57. This opening is cylindriranged in this opening. The valve 58 is of the butterfly type and is mounted on a stem 59 which extends through the walls of the opening. 57. An arm 60 is arranged on the stem 59 by means of which the choke Valve 58 may be adjusted. In thisV carbureter the adjustment of this choke valve. This varies the resistance .to the flow of air andconsequently the quantity of .fuel `which is delivered with.a-.givenreduction of pressure in the mixing chamber."` Forfkt'his reason the usual needle valve for adjusting the fuel flow is not necessary. Such an adjustment so varies the capacity of the carbureter that Where the single apparatus is used such as is thus far described/it is not vusually desirable but Where `the 'carbureter is supplemented as withthis carbureter with a secondary carburetertaking care of the ultimate capacitythis adjustment is of importance because While it makes the adjustment of the primary carbureter possible without thel additional adjustment of the fuel passage it does not have sufficient influence on the ultimate` capacity to interfere with the general operation of the Carbureter. While choke valves have been used to momentarily vary the quality 0f mixture as at starting itl has not' been practicalto utilize this for the normal adjustment because. of its effect on the ultimate capacity of the carbureter. The secondary carbureter is as follows Extending yat a downward slant from the mixing chamber is an opening 61'. This is initially closed by.' a butterfly valve 62. The butterfly valve 62 is carried by a' stem 63,

`cally shaped and a choke valve 58 is arr asA this stem extending through the walls of the carbureter. An armv 64 is fixed on the stem4 63 (see Fig.` 5). A pin 65 'extends from the outer end of this arm and the spring 66 is secured lto the pin 6 5 and to a pin 67 arranged onthe outer -Wall of the carbureter.

`vThis spring tends to holdv the valve 624 in its closed position as clearly shown in Fig.

1. The roller 68 is arranged in the end of lfthe arm 64 and this is in Vthe path .of an arm i 69 extending from the throttle lever 5. The

length of the Aarm 64 with relation to the 'y arm 69 is very'short so that a-comparatively slight lmovement of the ari-'m69 will move the arm 64 suliciently ltogrnove the valve 62 from closed position to wide openj'iosition. The

arm 69 is so arranged relatively to the throttle lever that it contacts the roller 68 ina late stage of the opening of the throttle andopens the valve G2 with the full opening of the throttle.

Fuel is delivered. tothe secondary carbureter from the nozzle 70. This nozzle is arranged in va screw plug 71 having vthe axial opening 72 communicating with the sages are such as togive to this secondary nozzle opening 70. A passage 737 is formed` in the carbureter body and this is'of two diameters, the smaller diameter receiving the screw plug -71 and the larger diameter` of the passage being large enough to receive 'the head of the screw. The screw plug 4 is screwed into the lower end of the passage 7 3.-

The screw plug-has the axial opening75 from which the restricted radial opening 7 6 extends. .-A groove 77 isl arranged around the screw plug forming an annular passage with Which the radial opening 76 communicates. The passage 78 extends from the passage 14 and supplies fuel to the second nozzle. QPreferably the passage 78is extended through the body and the opening is closed by the screw 79. v

In the operation of this `secondary car- 4bureter", 'the opening 61 controls the resistance to the air and forms with the nozzle what is known as a fixed orifice carbureter, the fuel being controlled by the restricted openings formed by the nozzle 70 and the opening 76 and the air being controlled by the opening 61. The relations of. these pasthan that of the primary cabureter but alsov richer than would be desirableeven for'maxi- `mum power, it being enough richer than would thus be desirable to supplement the lean mixture of the primary carbureter sov that the mixture as `a whole is'richer than commonly' used under' ordinary conditlons.

This gives to the carburete a very sensitive control, .an alr veloclty assuring atomlzation and a mixture giving the greater-eiliciency in the ordinaxiy range of operations,- and at the" s fame. time great capacity and a richmixtue'where high power is desired.-

The valve 62 when closed cuts off the in'- I fiuence of the reduced pressure of the mixing chamber on the nozzle 7 0; .This nozzle under these conditions is subJected ltoatrnospheric pressure. i'

We'prefer to use a number of restrlcted openings Aarranged in a serles -to resist the flow offi1el and vthus'control it.l In the present instance two have been used, the

lnozzle 6 and theopening 12 in the primary carbureter and the nozzle 70 and opening 76 in the secondarycarbureter. Where, a single restricted opening or nozzle is used, `the sizeofthe opening must be made so small that" a change of these parts.

The mixture from the secondit often clogs even'where careful straining v of the gasolene. is resorted to. By supplementing the restricted opening atuthe nozzle by a second restricted opening an yequal re sistance can beaccomplished with considerably largerv openings, and vthe danger of clogging is, therefore, much reduced. In the.structure as shown both the nozzle and the second restricted opening' are arranged inremovablev screw plugs so that the size When Vthe throttle is suddenly opened the carbureter the mixture-1s momentarily leaner than it should vbe land this prevents a- To obviate this diiiculty,

rapid i pick-up'. weihave provided a device actuated by vari- `ations of pressure on the discharge side of the throttle for delivering to the carbureter a supply of fuel supplementing that from the-regular fuel nozzle so as to give a rapid pick-up. v

The tubular chamber 15 is extended upwardly and is connected with the'passage 17 surrounding the screw plug 16 throughl the radlal openings 80 in the screw plug and the axlal opening 81 extendingv upwardly from the radial opening 80. The opening 81 is a 'restricted passageallowing a slight iow of fue] into the chamber above the plug 16. A

y plunger 82 is arranged in the chamber 15 and forms a loose fit with the chamber so i that when Ithe plunger drops the fuel in the chamber 15 below the plunger isl forced betweeny the walls of the plunger land the chamber tothe space in the chamber above the plunger. The plunger 82 has an extension 83 of slightly smaller diameter than the plunger so that when the plunger "drops the 'space 8 4 above the plunger is suchas to give a greater depth of fuel above the plunger.

' Ihe lower end of the lunger 82 when resting on the top of the p ug16 closes the opening 81 so that when. the plunger 82 drops,

fuel is maintained at a' level above the plungeriandv inthe space 84 and above the extension 83, The f cylinder 85 extends up' wardly from the 'chamber 15 yand 'the exten s1o`n-86pro]ects from theplunger 82 into the cylinder. A piston 87 is arranged on the upper end of the extension 86 and makes a sliding fit with the cylinder. The upper end of the cylinder 85 i`s` connected bya passage 8S with the periphery of the carbureter at the 'discharge side of the throttle so that the upper end of the cylinder is subjected to variations 'of pressure which take place above the il, throttle. 'Air -is 'admitted tof the upper end j of the` chamber 15 through fa passage 89 and the p'assage 90 extends' fromthe chamber 15 'into thev mixing chamber at a point preferably just above the initial air opening 47.

The operation of the pick.- up device is as follows -With a small opening of Athe throttle, the pressure above the'throttle iS rev of these openings may bey readily changed by closing t :duced sufficiently .to eect the lifting of the plunger. 82 through the differences in pressure below and above the .piston 87. If, however, the throttle is suddenly opened, the pressure above the throttle more nearl approximates atmospheric pressure an .the difference of pressure on the iston under these conditions will not be su cient to re- -tain the plun er in its upper positionand the plunger w1ll,' therefore, drop by gravity forcing the fuel below the enlarged partv of the plun erfto a position above it, and also Ile opening 81. In the continued operation of the carbureter the air entering through the passage 89 and delivered by the passage 90 carries with-it'the gasolene in the upper end of -the chamber 15 thus momentarily enriching the mixture and insurv-ing immediate pick-up. When, however, the

ordinarily .be practical can be used for ordithrottle is again moved to amore nearly closed position and the pressure above 'the throttle is reduced the difference in pressure on the piston 87 immediately lifts thev plun' ger lto its upper position allowing the lower end of the chamber 15 to ll with anew charge of fuel.v The plunger is retained in this upper position until the throttle is again\ changed. It will be noted that the delivery of fuel for the pick up through the opening 90 in no way disturbs the normal flow of fuel through the nozzles. Consequently the flow through the nozzles is immediately brought to the proper acceleration to 'balance the air delivery. This is important in that it is the disturbance between this equilibrium o-n the sudden opening of the throttle that the pick up device is designed to neutralize. It will be noted also that the plunger acting over the opening 81 operates asa valve in the auxiliary passage afforded through the pick-up for-the added fuel and that this valve` is controlled by the fluctuations of pressure above the throttle acting on the piston 87. It will also be noted that with the plunger in its extreme upper position the 'extension 85 very nearlycovers the opening S9 and restricts the passage of air through this opening and consequently the passage of air through the opening 9. This modifies.

the-pressure in'the well increasing toV some extent the reduction below atmosphere and consequently increases the fuel -level as it:

builds up in the well and also reduces the iiow of air through the passage 90 so as to disturb the proportions of fuel and air delivered through the passage 47.A

In the ordinary adjustment of a carbureter the adjustment isa compromise, a little richer than is required for best efficiency but better than the extremely lean mixture for pick-up. On the other hand, this over-rich mixture does not supply the requirements when the throttle vis suddenly opened. With this carbureter a mixture leaner than would vimac the quality for extreme power.

'What we claim as new .is:- J 70 1. In a carbureter, the combination of a primary carbureter comprising a mixing chamber, a throttle valve, afuel nozzle, auf air inlet, and means for varying the air inlet to vary the normal qualityof'mixture; and a secondary carbureter supplementing the delivery of mixture from the primary carbureter normally out of action and-comprising a fuel nozzle; an air passage leading to the mixing chamber and to which the nozzle leads, a closure valve for closing the passage, and devices acting through the. latter p ortion of the opening movement of the throttle for opening the'closure valve.

2. In a carbureter, the combination of a primary. carbureter comprising the throttle valve, a rotative stem carrying said valve, a rock ,lever on the stem for actuating the valve, a fuel nozzle, and an air inlet; and a seconda carbureter supplementing. the delivery o 'mixture from the primary carbureter normally outv of action comprising a, fuel nozzle, an air passage to which thei nozzle leads, a closure valve for `closing said passage, av rocking stem on which the closure valve is mounted, a lever on said stem, said lever being ofshorter length than the throttle lever. and arranged inthe path of the throttle lever and positioned Vro be actuated as the throttle reaches the later stages of its opening movement.

3, In a carbureter, the combination of a primary carbureter' comprising a throttle a rocking stem on which the closure valve is mounted, a lever on the'l closure valve, said levervbeing shorter tlat the lever Y o n the throttleand arranged in the path of said lever in position to be opened as theE throttle reaches its open position, and"V aV springoperating on the .closure valve lever for maintaining the closure valve 'normally in a closedV position.` l I .4. In 'a carbureter, the,combination of a prima carbureter comprising a mixing 'f chamber, a throttle valve, a fuel nozzle', an 'i air passage leading tothe mixing chamber, and a yielding valvafor said passage ac-` '125 tuated by the movement of air through the passage; and a secondary carbureter supplementing v`the delivery of mixture from the primary carbureter and normally out of.

11uv nozzle leads, a closure valve for closing said Passage,

liefuel supply, a secondary air passage leading'to the mixing chamber', and devices presenting a non-yielding resistance to the flow 4of a1r through the secondary air passage comprising a closure valve for said vsecondary air-passage,

5. In a carbureter, the combination of a primary carbureter comprising a mixing chamber, a throttle valve', a fuel nozzle, an

air passage leading to the mixing chamber,v

anda yielding valve for said passage actuated by a movement of airv through'the the passage; and a secondary carbureter supplementing the delivery of mixture from the primary carbureter and normally out of action comprising a secondary fuel nozzle, a secondary air passage leading to the mixing chamber and to which the secondary vfuel, nozzle leads, devices presenting'a n on-yielding resistance to the flow of. air through the secondary air passage comprising a closure valve for the air passage, and devices acting through the latter portion of the opening movement of the throttle for opening the closure valve.

.6. In a carbureter, the combination of a primary carbureter comprising a throttle val've, a fuel nozzle, an air inlet, and a choke valve for varyin normal quality o? y carbureter supplementing the delivery of mixture from the primary carbureter normally out of action and comprising a fuel nozzle, an air passage to Which'the nozzle leads, a closure valve for closing the passage,.and devices acting through the ,latter portion of the opening movement of the throttle for opening the closure valve.

7. Ina carbureter, the combination of a mixing chamber; av main throttle" valve;

a primary air passage leading'to the mix-V ing chamber; a primary gasolene jet located in the primary air passage; an auxiliary air passage; a spring opposed valve controlling the flow of air through the.l auxiliary air passage and arranged so as to cooperate with vthe primary gasolene Ajet in maintaining a" practically vuniform ratio of gasolene to air;` avnsecondary air passage eading to the mixing chamber; a vsecond gasolene :jet located in Ithe secondary air passage; anddevices presenting a non-yield-v `1ng resistance to the iiow` of air throughsaid secondary passage comp-rising@ a lclosure valve arranged to be opened during'the 'latterL 'parti of the f' main: throttle valve.y a

. c rtofthe" mixing lcham B5" posed" 'valve' controlling' said auxi iary *pasopening movement of -the 8. In a carbureter, the: combination of; i a

y rimary carburetor having .amixing cham- Eer, andl throttle valve, a primary airfipas-'- sage ilead-ing to the mixing chamber, a, priyp mary fuel jet located inthe' r primary air x passage, Aan auxiliary ,f air passage leading .M i

erfran'das rng'iopv fuel to'saigd 'carbreter in proportions to the air inlet to vary the mixture; and a secondary sage and arranged to coperate with the primary fuel jet and primary air passage in maintaining a 4,practically uniform ratio of fuel and a1r; a secondary carbureter comprising an air passage leading to the. mixing chamber, devices presenting a non-yielding resistance to the How of air through the chamber, a throttle valve, a fuel nozzle, an

air inlet; means for varying" the air inlet to vary the quality of mixture, an air passagel leading from the inlet to the mixing chamber; and a spring closed valve initially resisting the flow of air to the primaryA carbureter; and a secondary carbureter supplementingthe delivery of mixturefrom the primary carbureter and normally out of action comprising a fuel nozzle, a fixed air passage leading to the mixing chamber to which vthe nozzle leads; and means presenting a non-yielding resistance tothe iiow of air throughsaid passage comprising a closure valve for closing the passage;

10. In a carbureter, thecombin'ationof a primary carbureter comprising a 'mixing chamber;v a throttle valve controlling the flow from the mixing chamben'a fuel nozzle,

and an air inlet ;v and a secondary carbureter ysupplementing the delivery of mixture from V 11. In a carbureter, the combination of a primary Icarbureter provided .with amixing chamber, and means for supplying air and fuel to said carbureter lin proportions to forni la comparatively lean mixture; a secondary carbureterv delivering" to the 'mixing chamber of the primary carbureter and com# prising".4 a Separate air passage, lfmeans'. for augmenting .the fueldelivered :by the'primary cfarbureter and in proportion to the air delivered through -vthe separate air passage 'of thej secondary y carbureter `to form a finixture richer' than that. of. theyp'rimary'jcarbuteL-hd mlls'fl' throwing hip'l'- 'mary and 'secondary -v carbureters "successively, themixture' being delivered inlthe initial Stages by the primaryf" carbureter" ",alone' v "'f 12. In aarbu'retef, am` c embiliaionof a -amber, and;v means for vsupplying airy and primary ca'rbureter providedfwithja mixing' vform a comparatively lean mixture; a' secondary carbureter delivering to theimixingV j chamber of the primary carbureter comprlsinga separate. air passage, means for delivering fuel tothesecondary air passage in proportion to the air' delivered through theseparate air .passage to form a Vmixture richer lthan that of the primary carbureter, and

means" for throwing in the primary and secondary carbureters successively, the mixture. being delivered inthe initial stages by the primary carbureter alone.

13. In a carbureter?, the combination of a primary carbureterprovided with a mixing chamber, and vmeans for supplying air and fuel to said carbureter in proportions to,

"mary carbureter and in proportion .to the air deliveredthrough the separate air pascarbureten means for throwing in the primary and secondary carbure'ters successively,

sage of thesecondary carbureter to form a mixture richer than tha-tsv of the primary fthe mixture being delivered in the initial 1 stages bythe primary carbureter alone, and apick-u'p devlce acting with the opening of.

. the throttle for supplementing the normal l receptacle; and. a 'plungerfinthe receptacle' passing through the vent and connection'to actuated with -the opening jofjth' throttle deliver the fuel with theair to the @richer -than that of ithe means .for throwingin t 'ondarycarbureter's successively, -the vmixture carbureter `alone, and a ypick-up desupply of f uel delivered by the primary carbureter.

14. Ina carbureter, the combination of a. .primary carbureterprovided with a. mixing chamber,r and means for supplying air and fuel to said'carbu'reter in proportions to .v form av comparatively lean mixture a sec- 'v ondary carbureter delivering to the mixing chamber of the primary earbureter comprisseparate 'air passage,"means for dein 'pr'oportion to the air delivered through ,the separate air vpassag'eto lform a mixture lprimary'v carbureter,

e primary and sec# efivleredin the initial stages bythe 1 act l9uIllenrlentin'g the normal Supply f1-nel delivered l.by the. Pl'mlyjcarbureter. l

P with thevopening of the vthrottle chamber; a throttle valve means for fuel fromthe acting. wim pement-seid normal .1Dfi'., supp y thoutjdistu ing said 'anormal supplyj 16. In e eeybu'reter, he eembinetien o'ff e l carbureter a throttle controlling 5 afuelchamber -supplying :fuel

nection between the receptacle and said pasvc-arbureter passage; a throttle controlling 0^ in the degree of vacuum at the discharge side of the throttlefor ,forcing the fuel into the livering fuel to the secondary, air passage In a carburter, the combination of a Y .m1

ring.air. a nd fuel to said chamber;

to said passage; a pick-up denice comprising a receptacle to -which fuel is supplied; a consage; a vent above the normal fuel level in the receptacle normally preventing an indrawing of fuel through said connection by suction; and means acting with the opening of the throttlen for forcing fuel into the path of the air passing through the vent and connection to deliver the fuel with the air to the mixing chamber through said con- 17. In a carbureter, `the combination of a said passage; a fuel chambersupplying Vfuel to sald passage; a pick-up device comprising .l

a receptacle to which fuel is supplied, a connection between the receptacle and said passage; a vent above the normal fuel levelinthe receptacle normally preventing an in' drawing of fuel through said connection by suction; and means actuated by fluctuations path of the air passing through the vent and connection to deliver the fuel with the air to the mixing 'chamber through said connection.

18. In .a ca'iburete'r, the combination of a Y carbureterv passage; a throttle controlling said'passage; a fuel .chamber supplying fuel to said passage; a pick-up device comprislng f a receptacle to which fuel is supplied; a.

connection between the receptacle land said passage; a vent above the normal' fuel level in the receptacle normally preventing an `indrawing of fuel through said connection by Suction; a plunger in the receptacle adapted to ,elevate the fuelintothe path of the air passing through the vent and connection to deliver the fuel with theair to the mixing chamber through said `connection; and

means acting with the opening of the throt-'i tle for actuating the plunger.

19. In a carbureter, the combination of a carbureter passage;I a "throttle controlling '.saidpassage; a fuel chamber supplying fuel to said passage; a pick-up device'oomprising a receptacle to which fuelis supplied; a connection between the receptacle and said passage;` a vent above the normal fuel leveL Y inthe v receptacle normally preventingian indrawing of fuel "throu h said connection vby suction; a. plungern t e receptacle adapted to elevate the fuel into the -path Iof the air chamber vthrough said "connectiong' and means aetuated'by 'fluctuations injthe degrec-ofv vacuun at the discharge -side of the throttle for actuating said plunger.

' 20. In acarbureter,` the combination 'of a mixing chamber ;"means for delivering air of such liuctuati'ons to degree of vacuum at the discharge side of the throttle for momentarily supplementing the normal delivery of fuel, said devices acting to augment said normal supply Without disturbing said normal supply. A

21,'In a carbureter, the combination of a mixing chamber; a throttle valve; means for delivering air and fuel to said chamber; a pick-up receptacle; and devices subjected to iuctuations of pressure at the discharge side of the throttle and actin lunder the influence ll the receptacle on the closing of the throttle and to discharge the fuel from the receptacle to supplement the normall fuel supply when the throttle opens, said devices 'actin to supplement said normal fuel supply Wlthout disturbing said normal supply.

`22. In a carbureter, the combination of a mixing chamber; a throttle valve; means for delivering air andfliel to said chamber; a receptacle; and a plunger in the receptacle actuated by fluctuations of pressure at the discharge side of the throttle to tdischarge fuel from the. receptacle to supplement the normal charge of fuel as the throttle is\ opened, said lunger acting to supplement the normal supply of fuel Without disturbing said normal supply.

23. In a carbureter, the combination of a mixing chamber; means for delivering air and fuel to4 said cham-ber; athrottle valve; a receptacle; a pressure motor having its active element subjected to'pressures varying as the pressure at the discharge side of the throttle varies; and a plunger in the receptacle actuated by fsaid motor to dis charge 'fuel from saidreceptacle as the throttle opens. l

24. In a carbureter, the combination of a mixing chamber; means for delivering air and Afuel to said chamber; a throttle valve; a pump chamber; a plunger in said chamber; a cylinder connected with the carbureter at the discharge lside of the throttle; and a piston in the cylinder connected with the plunger.

25. In a carbureter, the combination. of a mixing chamber; means for delivering` air and fuel to said chamber; a throttle valve; a pump chamber having an air passage leading to the upper part `of said chamber anda passage leading from said chamber to the carbureter, a plunger in said chamber; a cylinder connected with the carbureter at the discharge side of the throttle; anda piston in the'cylinder connected with the` plunger.

26. In a carbureter, the combination of a mixing chamber; means for delivering air and fuel to said chamber; a-throttle valve; a pump chamber; a cylinder connected With l the carbureter at -the discharge side of the', throttle valve and with the mixing chamber and with the outer air; adpump plunger in said chamber arranged to permit the passage leads, said air passag of fuel thereby; and 'a iston connected with the plunger in said cy inder. 27. In a carbureter, lthe'combination of a mixing chamber; means for delivering`)air and fuel to the chamber; a throttle valve; a pump chamber and a Acylinder having a connection `With the carbureter at the discharge side of the throttle and having a connection to the mixing chamber and to the outer air; a restricted opening in the bottom thereof leading to the fuel supply; a plunger in said chamber; and a piston in the cylinder connected with the plunger, said plunger being adapted when in its lower position to close the fuel connection.

28. In a carbureter, the combination of a primary carbureter comprising a mixing chamber, a throttle, a fuel nozz e leading to the mixing chamber, an air inlet to the mixling chamber, and means for momentarily and automatically supplementing the flow of fuel as the throttle is opened; a secondary carbureter comprising an air passage leading to the mixing chamber, a fuel nozzle leading to said passage, a closure valve for the passage, .and means for automatically opening the closure valve as the throttle ap-` proaches open position.

'29. In a carbureter, the combination of a primary Ycarbureter comprising a mixing chambera throttle, a fuel nozzle leading to the mixin chamber, an air inlet to the mixing cham er, said fuel nozzle andair inlet having a relation to deliver a lean mixture, and means for momentarily and automatically supplementing the iow of fuel as the throttleis-opened; a secondary carburater comprising an air passage leading to the mixing chamber, a fuel nozzle leading to :y

Ysaid passage, a closure valve for the passage,

said fuel-nozzle and assage having a relationvto deliver a ricE mixture, and means for automatically opening the closure valve as the throttle approaches open position.

30. In a carbureter, the combination of a primary carbureter comprising a mixing chamber, a throttle valve controlling the fiow of mixture from the mixing chamber, Ta fuel nozzle, and-an'air inlet; and a secondary carbureter supplementing the delivery of mixture from the primary carbureter and normally out of action comprising a fuel nozzle, an air passage to which the nozzle being inclined to the direction of ow of t e air through the mixing chamber, and a closure valve in said'l air passage. Y f f 31. In a ,carbureter the eombination'of a-4 suction passage; means for delivering ,a combustible mixture comprising as its elements air and fuel to said passage; a throttle in said4 suctionpassage; a' valve modi ing a fiow .of one of said elements to sald y passage; and devices actuated by fluctuations in' the degree of vacuum at the disy sage leading to the suc charge side of'the throttle controlling said valve and enriching the mixturewith an increase of vacuum. i

In a carbureter, the combination of a suction passage; means for delivering a combustible mixture lcomprising as its elements air and fuel to said passa e; a throttle in said Vass'age; a valve modi ying a ioW of both o said elements to said passage;

combustlble mixture comprising as its elements air and fuel to saidV passa e; a throttle in said passage; a valve modiying a flow of one of said elements to said passage; and apres'sure motor having its active element subjected to pressures varying as the pres- `sures at the discharge side of the throttle vary actuating said valve and enriching the mixture with an increase of vacuum.

34. In a oarbureter, the combination of a suction passage; means for delivering air and fuel to said passage;a throttle in said passage; a vaulvesmodifying the flow of fuel to said passage; and devices actuatedby fluctuations in thedegree -of vacuum at the discharge side of the throttle controlling said valve and enriching the mixture with an inf crease of vacuum.

.35.In a carbureter, the combination of a suction passage; means for delivering air and fuel tosaid passage; a throttle'in said passageyavalve modifying the flow of air to said passage; and devices actuated by fluctuations in the degree of vacuum atthe discharge side of the throttle controllin vsaid valve and enriching the mixture witg an increase of. vacuum. Y

36. In a carbureter, the combination of a suction passage; meansfor delivering air and fuel to said passage; an auxiliary pas- `ion passage for aug'- menting ythe fuel supply to said suction passage; a throttle in the suction passage; a valve controlling the flow of fuel through said auxiliary passage; and devices actuated by fiuctuations in the degree of vacuum at the discharge sideof the throttle controlling said valve.

.suction passage for augmenting 3T.' In a carbureter; vthe combination of a suction pass a throttle in said passage;

means for de ivering airx'and fuel to said v of one of said elements through said. auxil'- y iary passage; and devices actuated by fluotuations in the degree of vacuum at the discharge side of the throttle'controlling said valve.

38. In a carbureter, the combination f'a suction passage; a throttle in said passage;- means for delivering air and fuelfto vsaid' passage; anauxiliary passage leading to the supply to said suction passage comprising a Well to which air and fuel are delivered and from which they are discharged to the Suction pass-age.; a valve modifying the flow of fuel to the Well; and devices actuated by i fluctuations in the degree of vacuum at the s Y y ldischarge side of the throttle controlling saidvalve.

39. In a carbureter, the combination of a suction passage; a throttle in said passage;

means for delivering -air and fuel to said passage; an auxiliary passage leading to the suction passagefor augmenting the -fuel supply to said suction passage comprising a vvell to which air and fuel are delivered and from which they are dischargedto the suction passage; a valve modifying theilow of fuel and yair to the Well; and devices actuated by fluctuations in the degree of vace fuel ss l uum at the discharge side. of the throttle/ controlling said valve.

40. In a-carbureter, the combination of a suction passage; a throttle in said passage;

'means for delivering air and fuel to said passage; an auxiliary passage leading?r to the suction passage and modifying` by a valve mechanism modifying the flow of air throughV said auxiliary passage; and deelivery therethrough the mixture o-f the suction` vices 'actuated by fluctuations in the degree of vacuum at the discharge side of the throttle controlling said valve.

In testimony whereof we have .hereunto '105 set our hands. Y v

' FRANK H. BALL.

FREDERICK O. BALL.

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