US1275620A - Carbureter. - Google Patents

Description

C. D. SMITH.

r AasuRmEn. y

` y APFLICATION FILED lULY 3.1915- 1,275,620. y Patented Aug. 13. 191s i' 'w 29 5 y o Z5 5 Y liu.' .1.

54 f3.5 ZZ l l0 n n 54 IZ l? 5 16-% 17 6 E E i 1419. 14

Charles lL/Szmlh lto the engine at all speeds.

UNITED STATES PATENT (onirica CHARLES I). SMITH. F DAYTON, OHIO, .ASSIGNOR Tp THE F111 M GF MQBNEIB, ANI) SMITH, OI" DAYTON. OHIG. A COPAETNERSHIP CONSISTING OF LOUIS MOB/NEB AND CHARLES n. SMITH.

CARBURETER.

Specification of Letters Patent.

Application filed July 3. 1916. Serial N0. 107.239.

lie il linovvn that l. (ananas D. SMITH, a citizen oli the linitvd States. residing at Dayton. in the rountv oi' lifontgoniery and Static ot' (lhio. have invented certain new and uselul'iuilirovcuients in Variiureters. of which the following;1 is u specilication. reference heilig' had therein to the. accompanying drawing.

This invention relate to cariiureters and ,is deaigi-wd more partirularly for nee in connection with automobile engines. altliiough its uae is not limited lo yauch engines. Much. diliiculi'y has been, experienced in providing aI carburetor which iviii furnish n mixture ote theproper riclinessiin the propel' quan.- tities at all iihcede ot.` the engine. the carburetor is Het to provide a proper mixture for low speeda, an increase in the speed of thc yengine causes a larger propor-- tion of gasolene to lic drawn through the nozzle. thus producing'a richer mixture..

lt .hat` heen proposed to overcome this ditli culty 'by providing a supplemental air opening' which will be controlled lay a valve... which grill open onlyY when the speed ot tlie` engine becomes such :la to tend to enrich the mixture delivered by the main feeding def vico. This Supplement-.rl device may feed air alone, to reduce the Suction onthe main feedingdevice as well as to dilute the mixture. o1' it may also feed an additional quann tityof gasolene furthe higher speeds; These supplemental feeding devices have not"'been entirely satisfactory however, because of the failure of the valve to act regularly Yat all speeds'and consequently the failure of Vthe supplemental devices to produce a uniform mixture. Various attempts have been made to secure a regular movement of the-valve, themost common device being the dash-pot, but while these devices have improved the operation of the Supplemental feeding device they have n ot entirely overcome the ditliculty and are open to various objections.

.The object of the present invention is to provide a. carbureter with a supplemental' feeding deviceiwhich willloe regular Yin its action and W-ill deliver a uniform nnxtare To vthis `end it is a further object of the invention toprovide a suction operated air valve with means for causing a regular movement thereof atl all speed conditions.

' Where It also an object of lthe invention to combine with euch au air valve a supplemental valve controlled gasolcne nozzle which will be controlled by the movement of the air valve It is also an object of thc inventiOn to provide a. device of this kind which-will he very simple in its construct-ion and its opera tion and which can he easily kent clean and in an ellis-lent ope 'ating' condition, and which can be manufact und at a lou' cost.

It is also an object of the invention to provide improved means for mounting the valve which ('oiatiois the liov of gasolene to the carhureter. l 1n the. aoco upanying drawings Iiigure l rs a. vert-ical `sectional vview taken centrallyr through a` carbureter embodying in v invention;A Fig. Si is a` sectional view taken on Patented. uff. 13, 1918.

the line ,ai-a1- of Fig.- l: Fig. 3 is a sec tional view takenon the line z/j/ ot' Fig. 1 Fig. 4 is a. perspective.detail view ot' VAthe air valve and the controlling means therefor: and Fig.4 5 is afpcrspective detail view ot' the `main gasolene nozzle. f In these drawings l have illustrated one. limbodiment of my invention and have shown the sameas applied to a carhurctec of a well known type, the main features of constrl-iction of which forni no part of the xpresert invention except?J in so. far as ,they may' enter int-o combination with `the tea- -tures which I have vadded tothe carinii-eter. The particular carlmreter` here shown is of that type known as the concentric lloattype and utilizes a heated air supply, ybut it will be understood that' the invention is applicable to carbureters of various kinds'and that. the present embodiment of the. inven- .ion is shown for-the purpose of illustration only` and it will he ialso understood that' the terni gasolene isherein usedas indicating any suitable fuel with which the carbureter will operato. the carbureterrhere shown being designed `for gasolene.

l The carbureter here 4shown comprises a casing 1 adapted to he secured to an explosive engine and having an interior passage-'- way 2 adapted to communicate with the. in'- take of the engine. When used with the ordinary automobile engine the device yis usually mounted so that-the passa geway will communicate with the intake manifold. Ar,-

4 conduit 5 .gasolene therein.

tle valve or butterfly, 3. Secured to the casing 1. beneath the passageway 2, is a gasolene receptacle, here shown in the form of a bowl 4, having a laterally extending provided with a nipple 6, by.

means of which it may be connected with a -suitable source ot gasolene supply. The

gasolene may be fed to the receptacle by to have free swinging movement to enable it vto accommodate itself to the movement of the lever. In order to provide this free movement of the valveand to render the same adjustable, I have threaded into the end of the lever 8 a Stud 10 having a substantially spherical socket 11 in which is mounted a ball 12 carrying the valve 9.

After the ball has been seated in the4 socket, -the edges of the socket are drawn about the same to s0 reduce `the opening as to permanently retain the ball within the socket, thus providing a very strong connection between the valve and its supporting device and one which Wil] at all times permit of a free swinging movement of the valve.

The gasolene is fed from the receptacle L to the passageway 2 by causing a .current of air 4to pass about the end of a nozzle which communicares with the gasolene receptacle,

- in the well known manner, As here shown,

fio

a tube 13, such as is commonly known as a choke tube, is screw-threaded into an opening in the casing 1 and 1s 1n open4 communi- -cation with the'passageway 2.- The lower endl of the tube 13 is mounted in an opening in the bottom of the gasolene receptacle 4 and is in open communication with a suitable source-'of air supply. This source. of air supply may be of any suitable kind, such as open communication with the atmosphere, but the present carbureter is designed for use with a heated air supply and to this end an air conduit 14 is secured to the carbureter in, open communication with the air tube 13 and leads-to a suitable air heater. The choke tubehas the usual restricted portion between its ends and is iiared toward the passageway 2. Extending through the restricted portion of the tube and into the flared discharge mouth thereof is a' nozzle 15 ,which is carried by a spider,'or cross arm, 16, mounted in the lower end of the tube 1 and which communicates by means of a conduit 17` with the interior' of the gasolene receptacle. 'This the suction .created in the passageway by the mel-ation of the engine will draw a supply way 2.- Preferably 4these of air through the choke tube and past the end of the nozzle 15 thereb causing gasolene to be drawn from -t'ie 4receptacle 4 lneedle'valve 1,8, at a point near its point-of connection withthe' cross arm 16. This valve is mounted in an extension 19 projecting downwardly `from the cross bar 16 and having an interior opening screw-threaded to receive the screw-threaded stem of the needle valve, this stem extending beyond the end of the extension 19 and having a handle 2O by means of which thcvalve may be manipulated. The extension 19 extends through a projection beyond the air conduit 14 and has its exterior surface screwthreaded to receive a nut 21 by means of which the Several parts ofthe carbureter are clamped together. It will be notcdthat the .float 7 is ring-shaped in construction and is arranged concentrically of the air tube.

The main features of the carbureter so far described are well known 1n the art and when the nozzle is adjusted for low speeds,

the increased suction created by high speeds of the engine will, as heretofore explained, result in the production of too rich a mixture. 'I have therefore provided a Vsupplemental feeding device whieh may feed either' air alone or which may feed both air and gasolene. To this end I have provided an additional air-opening leading to the passageway 2. In the present construction the casing 1 is provided with a lateral. extension 22 having therein a chamber which is in open communication with the passageway 2 and -is provided at its outer-end'wth an air-opening. This air-opening is controlled by a valvearranged to be opened by the suction created in the passageway 2, when this suction exceeds a certain predetermined point. lAs here shown the valve, which is shown at 23, is mounted within the chamber inthe extension 22 'of the casing 1 and has an annular portion provided with a flat exterior surface to engage a valve Seat formed The valve 23 is proline' of movement of\the val ve towardits open position, that-is, toward the passagesurfaces are formed by providing the valve with a'conel shaped portion 26, which is here shown as formed integral with the annular seat encasing and has a head 25 by means of which `it may. be adjusted. vided' with surfaces converging along lthe Lemeeo gngiug poi-Lion thereofw vThis eene shaped porlioii el' the vs l ve preferably terminates in :i iwylilnliienl portion 2T which is tnhnlnr in m usliuelimn lor mrposes which. will herenm- :r .er Milieux'. lf1 i;'ierntingwith thevelve so hold the seine nornnilly 'in engagement wieh ils "enf: und to oll'er progressively increasing rl snee lo the movement of the saine to wu rd its fully open position is e resilient de rie-e eeniprisiny s plurality of parte, such es the resilient ,lingers 28, :n1-ranged to beer against Athe converging surfaces olf the valves and to be spread apart by these surfaces es the vulve moves toward the passageway 2. The resilienlade'vioes, or lingers, 28, may be mounted in any suitable manner and may be of :my suitable number, but es here shown there three resilient fingers and they are moulded el; ih ,ir inner ends in n eolhir5 or 1`1ng,-Qll, nil-deh mounted Ain the exl'ension 253 of the easing' und, set against; n "houlijler 'loi-ined el; the inner end thereof. Vl'lris solo sliruetion 'n'mbles the fingers lie fifonvergge shnrply "en'erd labo smaller normen of the eens G end lio heer 'eg/annst lne seine .sn

n nii-:meer ce hold the sali ilrinljf on ills eene The in: nids el 'elle i.' lienl,4 :l ere prelferably er ed Le forni n. smoo'h siding content with the eene. While l prefer to form the eene on the valve end to mount the resilient engaging devices Within the easing,i this not essentilil 'lo the operetion of the device, as e reversal or other reerrsngement of the positions might; be made end more or less sntie'lfnotory results secured. .le will be appareil?, that the Valve Wlll be held nory l melly on i.

.sent rind that when che suction Wil-hin the passageway 2 becomes so greet lo ever-:3 ne'lfhe resiste-nee of she spring; lingers iil'e mlve will npr and the suc tion incr liner sind fui ller sway from its sent,a thus inel L oil the opening?, bnl; the snetiol'l increases and -the valve moves farther end. lertherfrom its sont, the resist ence elle red. to the movement becomes greater :ind grex-ile Hence ,it moves uniformly and regularly with changes of speed of the en gine fter the suction becomes greet enough to 'unseat it.

In the present device l vhave provided. menne lor feeding a. supplemental supply of gnsolene to the passageway al high speeds of the engine. To eeeomplsh this l have provided e supplemental nozzle or feeding lube 3() 'which is here shown as arranged substantially centrally of the chamber in the extension 22 and mounted in n sockel: 31 secured to and preferably formed integral with the ring, or collar, 29, which. Carries n heed Ll() eurried b v the stem il?.

fthe gewinne rem-pluche l. The is wlw. rroulwillrrl :1nd io lllis ond il is provided willi :1 during ond 2li which forms :l mire seniv lo receive :rmlvr member 34" wl'iirh is inversely lepel-od und is provided with :l slum il? ivllirli. exl'ruds lliroug'n e. redwood openingV Sill si. l'lie miler eud ol." [he vulve seni, und serres lo lguide l'he Valve in ,its moven'ienf toward V:ind nelly from iis Senf. The nozzle, or lube 'll: is provided nl. n, poinl` beyond ille redlufml opening' 38 witl'r nu enlarged opening @.clzenrlinglr lel'igri'ln wise thereon throi'ln'h 'which the vulve sioni 37 extendshud within which is coiled nspring' 3S) which beurs :it one end against n shoulder formed nl', he inner end nl l'lie opening in the lube, nt the other und against',

end, el' lhr nozzle. or lube. E30; is open so .that lhe head l0 ol the vulve siren] ex posed and nmjf be eugngejfu'l lo nrlunte The Valve. This zmlunlioia ol"v llu=l wlw is prei'- ernbly :1r-,compl"lied lo." ller inorenieul, el the unive *l z o will rnd the li( llr,rw rylirnlrirnl 'portion been slmiwd n'. lil' about ille inl-w Ill? willi n sliding n' and lseiner und el l'llis cylind'rirnl gjlorlion oi Alle valve hns been novided with u boss'l'l inlowliirll is screw-illreaulled n. stud 42 having' its inner end projecting 'into he hollow riflindriml pori-ion el' lhe nir valve end ndnpled lo euler the open end of lie muzzle.V or tullen ilk and engelen the heed of the 'rallye stein il?. fl`l1is serew 'tlu'rzulml stud :is provided nl' its outer end with e knurled hond I'-l---B by ineens ol: which il, may be ni'ljuslnd und e spring ll beurs ngnins 'the seine to ollfrer lrielionnl resisl :mee lo ils movement sind illus prerenl' :in :irriden'lnl disl'urlmuee of its mljusl'menl. ll will be apparent llinl. zu lhe nir vul-e ".l mores lowlrd ils fully open pos-lil iou l'h'e .sl-ud -ll will engiigre file sl'mn ol! the `h`Onseleno Valve 2556 and open the nozzle to nu extent corresponding;- lo the nir opening, thus per mill-.ing the gnsolene lo be drnwn through the nozzle into l'he passageway The een neotion betweenthe nir valve and l'hevnlve controlled nozzle nmry beso adjusted that the gnsolene nozzle will be opened nt the 'firstI movement of the nir vnlve ewa-y from its seat `or it may be so Adjusted that: the nozzle will 'not be opened until lille nil' Valve has moved e distance sufficient to provide an nir opening of va. predetermined size. The timing of the opening of the nozzle with seenred by adjusting the screw-threaded stud 49. In addition to this nljnshinenlI the speedj 0r suction,l et which the vnir valve will open may be ladjusted by altering the position of the eollasrl which forms e', sent for the air Valve. This colla-r -mey be secured in its adjusted position in any suitable manner, but preferably, I split the outerJ nozzle .fill

ola' the nir i'nlvr has l into position.

end of the extension 22 of the casing and Aprovide the same with lugs 45 through which ward the inner portion of said valve and lnwiigtheir inner ends arranged to normally extends' a clamping screw 46 which servesjd r'iigagethc converging surfaces of said valve draw the split end of the casing tightly about the collar and secure the latter firml The operation of the device will be readily understood from the foregoing description and it Willbe apparent that I have provided means for vautomatically feeding a supplemental supply of air or of air andNv gasolene to the engine which will be con' trolled by the speed at which the engine is operated and which will be of such a character that the movement of the controlling valve will be regular and uniform with changes of speed thus furnishing a proper quantity of air and enabling a mixture. of aproper richness to be maintained at all speeds. i

Further it will be apparent-that the deviee is very simple in its construction; that it has no complicated adjustments or delicato parts which are liable to be broken or disarranged or to beeomeelogged by dii-tor corrosion.

l'Vhile l have. shown and described one eni liodiment of my invention l wish it to be understood. that .l do notl desire to be limited' lo the details of construe-tion as obvious modifications will occur to a person skilled in the art. A For exauiple'lhe lateral extensin to 4the casing is here shown as of a length great enough to iiiclose the. air valve, the gasoleno nozzle. and the lcopeiating devices. Obviously these devices need not all bo mounted in the extension, and. particularly when the air valve used without the supplement-al gasolene nozzle, the eXtension may be shortened until it projects little, vit' any, beyond the side ,of theinain casing1 it being only necessary that ay valve seat should be provided with whirlrthe air valve may cooperate. The resilient lingers and guides may be, mounted on the easing in any su1table manner. l

Having now fully described my invention, what I elaiin as new, and wish to'seci'ire by Letters Patent, is:- l

1. In' a carbureter having a' passageway A leading to the intake of an engine and having an air opening conimnnicatingwith said passageway, a valve-to control said air opening, said valve being arrangedto be opened' by the suction in said passageway and havp' ing surfaces converging in the. direction ottw its openiiig movement, and resilient fingers acting on said surfaces ,to resist the moveve-toward its fully openfo-` tion. 2.l In a carbureter having an air opening provided with 'a va'l-veseat, a valvenormally inengagement with said seat and having sur faces converging away from Said seat, and a plurality of resilient fingers converging toand to ride over the same as said valve moves away from its seat.

v3. ln a-cabureter, a casing having a passageway leading to the intake of an engine and communicating with Va main source of air and fuel supply, and also having a suppleinental air op ning extending laterally` fromr said passageway and communicating therewith1` an inwardly opening valve to control said suppl'enielitfdl fll 'OP'll'llg Sadvalve having converging surfacesextend:v ing transversely to said passageway, and resilient lingers carried by said casing andv extending transversely to said passageway to engage said converging surfaces of said valve and resist the'mwement of said valve toward its open position. 85

Lil. l'n a carbureter, a casing having a laterally extending portion having its outer end open and provided with a valve seat. a valve mounted in said extension to engage said valve seat and having surfaces.converging away from said valve seat', a. collarinounted in said easing at a point remote from said valveseat,A and resilient devices carried by said collar and arranged to engage the converging surfaces ot' said valve to resist the' 95 movement of tlie'latter away from its seat.

5. In a earbureter, a easing having a laterally extending'poi'tion having its outer end open and provided with a valve seat, a valve mounted in said extension to engage saidlOD valve' seat and having surfacesconverging away from said 'valve seat, a collar mounted in said easing at a point remote f roni said valve` seat, and a series of resilient fingers i'igidlv secured to said collar and spaced 105 about the saine, said fingers converging to ward said valve and having their inner ends curved to provide slid-ing Contact. with the convering surfaces of said valve menilier. i

(i. ln a earliuieter, a 'casing having a laterally extending opening and havingr a valve seat surrounding said opening, an inwardly opening valve in said easing' to engage Said valve seat, said valve having a cone-shaped portion extending away from the valve seat,

a supporting struetur4 mounted i'n said easing in aliuement with said opening and resilientv devices carried by said. structure tos engage the eonesliaped portion of said valve 120 to resist its inward movement, said sup-- iorting sirurlure and vsaid valve having parts eoperaliiiig to guide the valve in v.its lliovement toward and from ils seat.

7. ln, a earliureter eomprising a czsing provided with an extension open at one endl and having a valve seat,surrouinling-said opening, a valve mounted in said .exlension to engage said valve seat, said valve having al cone shaped port-ion extending away t'roin 13u Sii-id vulve sentnnd nino having on opening' arranged. nt the apex of Suid cone, n. eollzn niolniiod :it n poini remoto ironi said valve sont :ind :i port carried hy` said collar io enter the opening' in Suid @one und forni. zi. guide iherofor. mid resilient device4 n'ionntod on sind rrollm' und. wronged to engage Suid cone to resist the movement of said valve away .from said seat.

Sl In a devil'v of the vlnlrneim.' described, a :nsing having :1. interni extension. open :it ite outer end and provideifl with :l vulve Sent adjacent to Huid onivr ondv` nn inwardly opening vii-ive movable lengthwiee 'l Suid exten sion toengage Said sent and control the peemge ofgiii' through Suid extension. n gasolene nozzleinounted :it l'heinner end of said extension, in line with said zur opening, n valveto control said nozzle. 'un operative Conner-.tion bel'nen Sli-id vnlverl, and reeilient devienemourned on Suid cash g near the inmei; .end ot .Quid extensonenii arranged to resist' the. -inward movement of said firstn ientioned valve.

9. In n device of thechractwr described, a easing having n lateral extension open at one end and 'provided with alvnlv'e seat, a valve mounted in the extension 'of seid ons ing `'and having Surfaces converging away from "Said valve Sent, a collar n ounted at a point 'remote from sai d valve stat, 'resilient devices carried by stud Collar to engage the converging urfeoes of Said valve, a supple mental gaolene' nozzle carried by said eollnr, a. valve to control said nozzle, and means Carried by Said air valve to aetnute the lstlneniion'ed valve to 'open said gasolene nozzle.

10. In a, device of lthe character described, n. easing having n lateral extension open at one end and. provided 'with n velve Seat, a, vnlverhaving nn annular portion to engage 'seid vflvefseal and lim/ing n hollow cylindricajl lportion connected With'snid annular portion by converging Surfaces, n oollnr mounted :1t a point renoto from said valve sont, resilient devices carried b v said coll-tr r1nd 'engaging `said 'converging surfaces to resist the movement 'ot said valve aWn'y froin .iin seat, a supplemental gasol'ene nozzle earried' by said lCollar and having a portion eX- tending into the' hollowr Cylindrical portion of said valve to forni -agnide for the latter, :1- sprin-g :letntted vnlveto control said gasolene nozzle having,r n stem, :and n partent'- riod by S'nid ni '."vnlve to engage said Stern and intente Said last-men l.i'oned valve to `open szi'id nozzle. r

11. In :1. device of the character described, a easing having. n lateral extension open at one end and provided with a valve seat, o valve havingnn annular portion to engage said valve Seat and having a hollow cylindrical portioi connected with said annular portion by. converging surfaces, a collar letter, it spring nelnniod vulve to Qontrol Suid gosolene nozzle having' :i stem, and :in mljuetnhle port carried by Sunil nir vulve to engage sind :dem :1nd :lcfinil'o Held inet-[noir tioned vnlvoio open Suid nozzle.

ln :i devieenol' the elnxrmzter described, :i easing having n interni extension open :it one end and provided with :i vulve sont sur rounding" seid opening, Ia volvo having :xn

nnnnlnr portion to engage said vulve sent.

und :i cone shaped portion terinirniting in ai` hollow eyliinlrionl portion :it 'its inner ond, n collez' mounted nt n point remote from Said valve sent, reeilient devices married by Said onlinr to engage the eene Shaped portion of said valve to resist' its movement from itsl sont, said'oollar having n redini Urin7 a Suppleznentnl gnleolene nozzle enppor :i by seid arm and havin. :L- art oxtendiir into the C) hollow portion oi? said valve to forni :L guide for the hittert u. vzilve 'to control Seid gesolene nozzle having n stein lornetuating the same, :L spring net-ing on said Stena. to hold said valve normally sented, and :t stud adjnstably mounted. on Said nir valve and :1rrenged izo engage said Stern to netnate said lmtnieni'ioned valve to open Said gneolene nozzle as Said air valve :n'iovoe mvay from .its seat.

i3` lnmj device of the charentes# described:` :i easing having n. lateral oxteneion open :it one end sind provided with, :L vnlve sent S1112 rounding seid opening. et valve arranged to engage Said valve sea-t, :t elipljilen'lental, valve controlled, gneolone nozzle` :t Structure mounted Within .Cz-aid extension. to support said noz-:ale` an operative eonne'etion between said nozzle' and said dir valve to cause the nozzle to be opened :is seid nir valve moves may from its Sent, Suid nir valve and seid supporting structure having cooperating parte to controlV the movement of Said valve, said` parte eonnbrising a cone carried by one of Suid members :1nd resilient devices earried by the other of Said members'and arranged to engage said Cone to resist the movement of aid nir valve.

14. In n device of the character described, n easing having :in extension at one end and provided with n valve nenta a valve to engage said seat, a supplemental gasolene noz? zle`v supporting structure mounted in said nozzle, said arm having a conduit leading to structure and snid air valve having eoper ating parts to reslst the movemnt of lsaid .extension and having` an arm to Support said :t source of gasolene Supply, said support-lng i valve, said parts comprising a cone secured to one end of said vmembers and resilient lingers' secured to the other of said members and arranged to engage said cone as said valve moves away from its scat.

15. In a carbureter, a supplemental feed- A ing device comprising an air valve having surfaces converging in the direction of its nlm-'ement' toward its open position, and resilient fingers converging toward saidv valve and having their ends arranged to engage the converging surfaces of' said valve to rev sist its movement toward its fully open poA sition.

mental valve-controlled gasolene nozzle, a structure mounted within said casing to 'support said nozzle inaxial alinement with said opening, an operative connection between the valve of said nozzle and said air valve to cause the nozzle to be opened as said .air valveV moves away from said seat, said air valve and said supporting structure having cooperating parts to control tl^e movements of said air valve, said parts comprising a cone carried by one of said members,l and resilient devices carried by the other of said members, and arranged to. en-

gage said cone to resist the movement ofsaid air valve.

In testimony whereof I aix my signature hereto. 1

oHAs. D. SMI'Tn.

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