1,430,038 10 inches aiid less than 1.2 iiielies, the coi).(litions of ptiiiiping and dumpidg ii,ill oN-ei-lap. Fui,tliermore, it is entirely pi,actical to 6 make the 17olume of aii- iii the lift I)ipe 2 iiiiieli greateitliiii above inclicate(I tji(I itnder cei-tain conditioiis, the aiiiotint of li(iiii(I in tl)e lift pil)L, mav be the eqtiin-,tleiit of il@) nioi-e tlian 4 inclies"oi- eN7en 3 'Inclies of soli(I 10 li(]Lll(l. Tri stieli case, tlie, coiicliti.oii,,; foisinitiltaiieoits 1)tiiiipiii,, and (Iitmpin(,y NN-ill. (@xist wlieriei-er the i-,iciitim in the miiilfold is less than 12 inclies ancl (-i-eatei- tliill 4 iiielies. Sueli ii,ide overlal) is seldory) i)ecessary, 15 and I 1)i,efei- to inake it less, in or(ler that I iiiav liai-e (,i-eatei- latitiide iii the (.Iesign an(I operation of 1)ai-ticiilar inst,a,lla.tions so as to accoiiimodate )vi(le, variations iii the (leptli of li(Iiii(I in the i-ear the 20 inclination of the car ivlieji travelin(,- ut) steel) liills and the practically perniissil)le elevatioii of the reservoir al)ove the carbiireter. As before intimated, t.lie acttial on-erlal) 25 of the two conditi@ns is not always iieeess,,i.ry. If the effective weight of the lift coliimn of liquid were 12 inclies and the diseb,ii-ge column only 10 inebes, tiere Ni,oiill be iieitlier pumpir@g inoi- dtimping for N,aeso uums between 12 inches and 10 inelies, but such coiidition will not persist long eiioiigl) for the carbureter float @chambei- to eiiipt@y, because changes in grade, or the fall siij-)ply of gasoline in the carbtireter float cliantber, or the operator's changing of the t!ii-ottle adjustiiient will change the engine sl)eed, and any stich change, will be stiffieient to vary the ai-allal)le vactitim nitieli more than the 2 inclies necessary to get above or beloav 4o the non-piimping and non-dumping coiiclition. I pi-efer to arranae the otitlet for the liquid and air from pipe 2 into the tank, in the form of elongated slot 26 -toc,,ited ai 45 or above the normal level of liquid in the ta-iik-. A much more elongated opening 27 is formed in the float so as to leave 26 tinobstrtictedthrotighout the range of niovement of the float. Above 'this openirig, an(t 50 molintedoiithesamegtiide,l I)rovideaconesliaped (leflectoi- 2,@') which ten(Is to pi-eN,eDt pai-ticles of liqiild from beiiig projected inio the vicinity of the siietion intake tl)i-()iigli i,alve seat 37 wlie-re they iriight find tlieli5.5 wa3, to the manifold and over-carb(ii-et tlio cliarge passing tlieretlii-o-Li(yli into the eiigiiie. For the same reason, I D efer to liai,e tli(@ v,tl\-e 36 and intake throtig),I-i vali,e set( -@))7 located at the top of an upwardly exteii(]- 60 in recess as shown in Figtire 2. In Figtir6 8, 1 ]i,,ive sliown a forni of float coiiti-olled carbtii-et(,r iiiii@t valve, the only flifference being that ;ii tlio form shown in Figiire 81 the ball ind socket .*j joint is inodified by ctitting the scicket deepI es it P(Ssll)le to (lisl)eiise in cas in(r 9 (,ril)e(I niy in %-eiition. -,-,-Iiat I (lesii-e to sec(ire I)v f,et85 1. The combination of a IoNv level li(Itzitl ftiel tank, a Iiigli lei-el, single-clianil)et, fee(i reseri, oii,, i. vactitim connection froni sai(I resei-xoii- a(lil.)te(I to 'I)e fitte(i iiito the \-ai-iaI)le vaciiiiiii in(.Itictioii 1,)il)e of t i-ai,iable. 90 tl-irottle. i-ai-ial)le sl)eed intei-nal combt,,stioii engine, an as(-ension-pipe froiii said tanl,- to said reservoir and liaving me-,ins foi- i-esti,lete(Il y a(lixiltting air thereto to ll(,,Iitei-I the weight of tilie aseendiiig coli-,tnn. t cai@I)ti- 95 i-eter having t float-controllcd inlet val-@,(,@, t clowiifloii@ I)ipe coiinectiii(, said i,esei-voir aiid s,,iid iiilet aiid an alitonia-tic clieck viIN-e T(ir 1)i,eN-eiitin,)- ren-erse floav of flili(i in sii(I 'dowii floiv 1)'pe; the i-escri-oir bein-g po I --@- I)Osi- 100 ti6ne(I it siieh ai) elei-atioii al)()ve said. tanj'c aiid stid carl)i-ii-etei- beiiig positiozie(I at siieli aii elevttion I)elow sai(i reservoii- that tlio static liet(I of the coltiinn of li(juid in sai(t (]ownflow pipe is gi-eater than the -,I-eiglit 105 of the coltimn of niixe(i @lj@ and liqitici iii sai@i ascension I)ipe for the ptirpose (le scril,)ed. 2. The conil)inatioii o@ a lo%v level liqili(I fiiel tijili@, a Iiigh lien-el, siiicle-cliai-nbei.@ fee(] 110 i@eserv oir, a vacituni c(linectior fi-om stid a(laptf-@d to I)E@ fitte(I iiito the lil(-Iiictioii I)Ipe of an iiitei-nal co!ait)ii,,;tioii on(Yine, aii aseeiision pipe from sai(I tali],[ to sai(i ancl liai@iiig, meiiis for i-estri(,te(II-@7 115 t(liii.itt:ijiir @'-.tirtheretotoligliteii tlioiA,el,--hto:f the as(,eiidiiio, coltiniii, a cai-I)iii-etei- liaN,il),)- -.1 float(.,ontrolled inlet, a, do%vn-fl(W I)il)(@ C(iinectiii,, sai(I iesei-voii- aii(I sai(I iiilet, il)e i,esbc@iiig I)ositio7ie(i at. siieli an'el e\,ati(,,n 12U il)oiTe said tanl;@ -,ind sai(i I)eillr I)ositioiiecl at sii(,Ii aii ele\,ati(in I)elow sai@(-l tliit tli(- static liead ol' the colitiyiii of liqiiici in s,,Iid (,Ioii,n-flow t)ipe is cri-eitetfliziii the ivei-lit of the of rnixe(I tir 125 -in([ li(Iiiid 'n sa'(1 ,is(,(,nsion pil)e, an(I ,tiitoiiiatic i-yieaiis foi@ t@lie, iii)-flow of liqtiicl in said doivii-floiv 1)i@e to said singlecliamber i,esern-oir cluring iritervals of hif,@ll suction pres@,-ure, (.1. col.l.esl)oll(llii,,Ii, l(@j i(,tli(@iiincr the ne(,I@ (f tl)e, ])all 'I'Iiiis consti@ticte(l. til.,@ vaii-e II I's positil-elv ('lose(] I)y the float li' %vli(,ii the liqtti(i j(@'a(@lies a I)i-e(letei-niiii(,d I)ii,-Ii len-el. -tnd is positIN-elv opene(I a(,-ai't' 70 ia-lieii the liqtii(I i-eacl)es t I)t-e(lotei,mliiect !oN-@- le\-el. I)tit foi, ill iiiterniediate levels. tli(@ %-,ili-e N\-ill ol)eii freelv to let liqiii(I flo\v fi-oiii tl)e i-esei-i-oir 3, a'@(I will close the cai,- btii-etei- floit (,Iiiml)er iA,Iieii the floiv 75 @-ei@ses. I'Iiiis in tlie, at-i-angetnent sliown ii, Fi(-tire 8, the i,al\@e 11 ])el-forms not onlv the function liet-ptol.ore described in conne'etioli witli 7, I)iit also the ftiiietioii (lescribed iii connection with the' i-aln-e 17 ill 80 cisiii(, 9 This w'tli the N,-,ilie I Ilai-irig tliiis I cla'iii as iiew ters Patent is:

1,430,038 3. In a vacuum feed sy tem of the class described, a lo-", level tank, a, high level reservoir having only h gingle chamber, a conduit leadinefrom the low level tank'to 8 the reservoir, means for restrictedly admitting air to said conduit at the low level, nieans for a@plying the suction of the motor to the high level reservoir to maintain a partial vacuum therein and -,vitl@drhw. the io air there separated froi-n the liquid, a conduit dii,eetl3, comii,iunicating i-,,ith and leaddown-,;@,ard from said reservoir to the carIllgeter, a check val bur ve in said condi-iit below the normal level of liquid iTi the carbiireter red to prevent reverse floiv of the liquid 15 arrang, toward the reservoir, the beight of the, reservoir above the carburetei, and the amouilt of air restrictedly adniitted to the lift conduit being predetermined and proportioned 20 so that the static head liquid in the downward column will be greater than the static 1-iead of the column of mingled air and liquid in the lift conduit, in combin,-tion w-ith floatcontrolled means,in tlle reservoir for 25 automaticallv c-Litting off the vactitim and ventino, the eservoir when the liquid reaches a predetermined high level in the latter, w.hereb3, the apparat-us will lift and dischar-e the liquid alternately .it -high, vacua so and -simultaneously at low vacua. 4. In an apparatus of the dlass described, a lovv len,el tank, a hilyh level reservoir,.an intermediaie condiiit, @-ielins forrestrieted@v admitting air to said conduit at the, low 35 level, nieads for applyi@o, vacuum to the reservoir at the hi,Lyh lev@l and a terminal discha.rge pipe for-said conduit extending vertically downward into said reservoir, in combination'witli a float vertically giii@pcl 40 upon said discharge pipe, openings carried plemental discharo-e openings in said dischar@e pipe and a7downward deflector carried by.spid float abone said suppleinental 45 dis(@harge openings. 5. In a system of the class described, a reservoir, a vacuuin connection and valve therefor 'a float for intermittently closinand op6@,iing said valve in accordance witi-i Bo the level ol' liquid in the reservoir, in combination with a kick spring device connecting said float and said valve, said kielc sprinz device coi-iiprising fixed, aligned, space-apo,rz pivots interniediate t-he floa-@' 56 and the valve, bifurcated raditis arms hpving their bifurcated ends mount-I'd on saicl spacec-I pivots and tiieir free encis engao-inrespectively the floqt and ihe va'@.ve, ,i:@d 'a' spring cop-iiecting the bifiircq-tioiic, of 60 radius ar@m@, substantially ir, E, vertically central- p--a@ne at right angles to 'u"tip, axis o@ said pivots t-he proportion of -@@he, -,-)arts being su@n til'a@ the iioripal rangeo-@ @aioveineii,, of the float -%vill cari,y the free end of its radius arm alternately above and below the 65 dead center of stres@ of said spring with reference to said fixed pivots, thereby causing snap opening and closing of said valve. 6. In a svstem of the class @iescribed, a low level tank, a high level reservoir, a carbu- 70 reter havitig its float chamber at an intermediate. level, a conduit extendin- froiti the tank to the reservoir, a second conduit extending from the reservoir to the carbureter float chamber, in combination @ with @an inlet 715 valve in the carbureter float chamber. said valve being formed and al-ranged to norn-ially close. by gravity against reverse flo w of liquid toward the reservoir and liaving a lost motion connection with - said float, 80 whereby said valve will be positively opened when the float is in the lowermost position, positively closed when the float is in the uppermost position and, for intermediate positions, , will operate automatically to perinit Be gravity flow of liquid into tlle carbureter float chamber and to prevent reve@se flow of li(Tid toward the reservoir. The method of supplying liquid fuel from a low level tank to a carbureter at a 90 liiglier level throuah a continuous cond-Llit extending from saicl low level iipwa@d,to a point@ considerably above said carbureter -level and downward to the latter level by means of the variable vacuurn available in 95 the manifold of a variable load, variable ispeed intert-lal combustior. engine, which niethod consists in applying the variable vacuum at a higli point ih said conduit, restrietedlyi.admittidg air to said conduit at loo the low lei,el tliereby causiiig a rising column of in'inuled air and liquid to flow iipward thro saicl conduit to said high f rorn the air at @aid high point and with- loh drawing the air by the suetion of said -vactium so as to maintain in the descending portion of said concluit a, solid coluinn of liquid of less vertical height but heavier than said rising column; w@ereby at tinies of 110 certain p@edetermined lo-w vacua the drop column will withdraw liquid fiom the high. er poi-nt simultaneously with the raising of the li(yhter columti. of air and liquid through the Fiit portion of the, conduit; and, at 115 times of higher vacua, -ilitomatically preventing revei-se flow of said liquid from s,,tid carbureter 'Llo stid high point and utilizino, inereas,-iig len,el of liquicl at the high Point to interiyiittently cut off the, vacuum 120 and vent the high point Signee, at Nckv Yoi,k city in the county O'L New York and Stite 6f New Yorl@ this GI I gU '7 9,1-tb do@y ' ,,,.u st, C,- '@IAR';LFIS 4T.@A WRENk@/ - 'E S@OKES, by said float adapted to re-ister with sup- point; per inly the liqiiid to settle out

Patented Sept. 26, 1922. 1143OP038 UNITED STATES PATENT OFFICE. R,.UARLES LAWRENCE STORES, OF LOS ANGELES, CALIFORNIA. LIQUID-FEED SYSTEM AND METHOD. Application filed January 9, 1918, Serial No. 210,965. Renewed February 11, 1922. Serial No. 535,926. 7'o 011,11,71011? -it 71?fly CO?ic(-;I,ii: @ Be it known that I, ('.[IARLES.LAWIZE-.,-('E STOliEs, a eltizen of the ITilite(l, States, and ilesi(leni of tos An(reles,'iji the countil of t, Los Aiigeles and State of (laliforiiia. iiave ina,ente(i cei-tain new an(I tiseftil Iniprove7 nients in ljiqtii(IF(@e(I Systems an(I M etliods, of wliieli the folloavin(, is a specificitioii. ell This invention relates to liquid feed s@,steiii,@ and patticulai,Jy to liquid fee(i systeiiis operated by tiie vaciiiiiii indtice(i I)y the st,.etion strokis of an intei-nal coiiil)ttstion engirie. It i-neltides a metliod in conjunction wi.tli 15 an al)pai-attis tnd ineliides as one of its princil)al featui-e a Iiigli level service resern-oir consistin- of a single cliaii-iber. The vacuitm is al)plied to this cliamber to stick the liqiii(i from a low level stipplv tank as foi, instance 20 the tank iisiiilly carii ed on the i-eai, end of an atitoriiob@le ind from tlils cliaiiiber the li(Itiid floii-s by (-i-a.N,ity tlirectly to tlie, consiiiiiption device, as for iristlin(,e, the cirbtiretei- of the engide. 25 The apl)lieation of the I)umping v,,tcuiiiii is iiitei-iiiittent and is controlled by a float witliin the i-esei-voir wlileli ot)erates to desi.i-oy the A,a(,tttiin and (l,@scontintie tlie, I)tinipiDg wlien the li(Iiii(I i-eaclies a I)redetei@iiiine(i 30 I)igli level tnd ivliieli restoi-es the iactium ivlien tlie llqtild falls to i predeteriiiined low. level. Ordinarili these periods of I)iiiiii.)inoV and discl)ai,-in,,@"follow eacli otliei- ral)idl enoiigh to iiitintain a silpply of the llqtiii'l 35 to, the cirbiii-etei- coiistant elloug)l) fol.' all pi-actical pi,ii1)'Oses. Nevertlicless@ Lin(lei- certain practically iintvoidal)le coiiditions as where the autoinobile is Itiborinogul) a stteel) -rade, witli open thi-ottle aii(E docreasing 40 si)eed, I tlie, vactitim induce(t by the siiet,lon strol@es of the motor becoii-ies too weak to lift the (yasoline frorn the rear tank id'tlie, ilesei-A'oii@ so the i,eservoir cloes not fill, the float (loes not rise, the vaciiiim is not cut 4 r) off and so even thotigli tliez-e be @t (,@onsi(ter,tble supply of liqtii(t in the reset-i-oir, the vaciiiini pi-ex-erits its cyl..,IN,ity flonv.t@o the I carbtiretei-. In practice, the engine stops I)e-foi-e the vacuiini gets low enotiali to permit 60 anN, flow to the ca,rbureter. HeDee it i's no@i, the tinivei-sal pi-6Lctice, to mali:e t-lie Iiigh level reservoir for such piirposes a twocliaml)er receptacle, one servin(, as the pitinp chanibei- and tlio othei- a (lump . cliambei- into 55 whicli the piiiiip chambei- oml)ties by o-i-,tNitv thei,eb y maiiitaining a sul)plv of i(litid at 111 times free, to flow by gravity to the carb@ireter. By my present invention, .1 am able to employ a 'hi(,h level' reservoir haviiig only a60 tn sin'le chamber wliieh serv(@s as the vacuum 9 1)u chamber and to arrange matters so th tt igll of the liquid therein m-ay be, avail al)le as a reserve supply during the above (lesci-il)ed ei-iods wlien the available slictioil 65 p is iiot'sti-ong enotigli to pump and when the i-eservoir is noi full enougli to operate the stietion, cut-off. To this end I dis ense witli the etistom'ary @ p dump @liam . er t'nd connect directly to the 70 i@esei-voir botli the drop pipe froii-i the reser@-oir to tlle carbui-eter and the lift pipe from the tank to the reser,@oir, so that the drop ,,e contains a solid column of the liqtiid apni c I pi-edotei-mine the lieight -of that col- 75 iimii so that its hvdrostatic suction on the i-eservoir slitill liave a value predetei'mined witli reference to the above described low ptiml)ln vacuums cominonly occurririg in prictical tise of the automobile so that the so solid coltinin of liquid in the drop pipe will be heavv'enougli to drttw down the liquid froni tl@e l@i gh level reseri,oir agaiiist tl-ie opposingr suction of-such lowvactiu'ms. For instance, if I locate the reservoir ten inelies 85 above the carbtireter eliminating the diiinp tank iiid maiiitairi a solid column of liquid iii the di.-op pipe, the ",eigbt of said coltin -in Al' ill draw down liquid fron-i the reservoir @i-lienever, there is less thtiri It ten inch vacuurn go in the reservoir. TI-iis expedient alode, how(',@,Cr, AA'Oiild be entirely ineffectii7e in practice since the rear tank -is normally lower than the carbui@eter, say ten inches, and the, low(@st vacutini that will suck 'fi-om the rear 9,5 tank to the reservoir is this ten inches plus the ten inclies that the reservoir is above tlle carbui-eter. Hence, the rese.rv,oir will not puinp oji 'less than t twenty in@h vacuum. I'his leaves a practically l@robibiti-,,-e g,,tp loo betil-een the twenty inell vacuum that iiill ptiinp liquid up fr6m thet rear tank and the ten inch iacuiim whicli ciin be overcome bv the solid coltimn of liquid in the drop I)Ipe. 105 This (ral) I ha-,,e stii2ceeded in bridging tn foi- all I)i.-acticil ptirposes by making the weiglit oi- liydrostatic liea(l of the column of li(ju@d in the lift pipe between tank and i@eservoir abnorinall@,liglit by utilizing t-lie iio ,iir lift principle, selosed in my prior :itents of June 19th, 1917, inos. 1,230,537, 1)

1,430,038 1,230@596 ind 1,230,832. Iii t-lils -%Yav the su(@ked-up fliii(I is in',ide to consist I)ai@tIN- of air wliieh lias no weiglit. III this XA@liv, the total e:ffeet.ive weiglit of the coniposite fluid .5 lift eolttiiin can be deci-eise(I to, sav tavotliir(is or one-liilf or ea-ey) one-q'tiarier the weiglit of i solid coliiiiin of gasoline of the same, Tlius. the twent-v incli lift colunin of gtsoline an(,l aii- iiiav be niade io li(rliter than the cen inch discli,,trce coltimn of gasoline witliout aii,. Or more creiierally stated, the gap t)etween N,acuums that A@,111 puml) the lift coluiiin an(I vaciiums tl)at the dischai@ge col.timn will overcome and draw t5 against, ii)av be decreased Is mucli is necessarv to ina@e the supply obtainable bv the latier metliod coiitiniioiis Avitli the st'ippl obtainal)le I)v nori-nal oper(ition, or as nearlv ' foiind pr@(ictl(!alli,'Tieeessai@v "' so as iiiav be iii 2o anv gii-en (,ase. It is eiitirely practical aiid in man-v (-ases desirable to make the heiglit of the ies(,i,N-oir above the carbilireter float clianibei- iiii(I tiie, amount of air adniitted into the lift liiie 25 great enough so that the (loivn eoltiiiiii NA,lll be lieavy eiiough to draw gisoliii,@ fi-ois the reservoir bv gravity Nvlille the siieti(ii ill tile reservoir is still gi-eat eiiou(rli to sii(- I@ the aii- aild liqtii(I from the low lei-el taiik. li) 3o a(,tital I)ractice. the i@actitiiiis stiitable foi- stieli .siiiiultaneotis ptiiiipin(, .iii(I diseliar(,e for ,i single chamber ai,e likeIN @ to be ti-,,tns'toi-Y, because the roa(l gia(les tn(i motor sl)ee;ls' vary -widely and ral)idly, bitt the abilltv t( 3,5 secure an overlap'of tlie-;e (-ond'tions is of very gre-,tt iml)oi-tance I)e(,,iiise it mtk(@s it possible to design aiiv (riveii installatioii so that the entii-e conf'en'ts of the I)tiiiil)lii@,r charnber will be ivailable is in en it@i@o-eiic.x40 resei,i,e to carry ovei- the al)ove (teset-II)e(I critical coiiditi'oii of opei-ation,. wliej-e all i,aciiiiiii fee(I systeiiis on atitoiiiobiles lia\,e heen f(iind to I)e iveakest. My inventioli ineltides vai-lotis iiox,el fe@i4 r) tures of the tpl)aratus sorne of wlii(,Ii pai-ticulai@ly !,tdLI)t it for the special I)tiiposes above aescribed and all of -,Yliieh ti@e iisefiii in various other foi-n-is of i-a(- tiiini fe(,(l al)- 50 mentioiied arringiiig the (Ii-op pipe iii(I @@ti connections to the reser@,oii@ so thit the (,olumn of liqtiid therein is at all times iii fi-ee commiinicatioii with tl@e bo(ly of li(Iiii(I within the i,esei-voir; ai,rangido, the 56 valve at a low level poi-nt ()f sti(-Ii (,oltiiiiii,- pi-eferabll- below the level of li(iiild iii tite carbiii-(@te@ float cliambei,; eiiil)lovin,,,, (i stil)stantially iieutral clieck A,-(ilve, that is oii(@ which opens and closes iii i-esl)oiise to foi-- 60 Avai-(l oi- i-ea@erse flow of ii(Iiii(I as (iistliiriiisg e from one wliieli is m-,t(le self-(-If)sl-,),(, ra@ ity or spi-idg presstire; i-,tiliziti,(, ttie resei-N-oir inlet pipe as t guide foi- tl)e floit in the resei l -voir; provi(lin,), sticii Boat w'tli a 65 shield or baffle a(lapted to deflect tile iii(loiiiparatus. Among these fe,,Itui-es 1)(, in liquidawayfromtlieeiiti-aiieetotliestic9 tion pip(@- a slinl@)lifie,(l foi-in of qui(,k-tliro-,v or kick-spr'ii(, -l'otthe suction controlling fiiii(@tioii of the fioitt more definite. iiistirit:ijieoiis iii(i (,ei-tiiii. 7 0 The al)OA7e, an(i othei@ of i-n3- iiivention %vill be iiiore ftill@- tin(lei-stoo(I frojii the folloAN,iii(, description tliei@eof in condeetion Nvith the acconiptilvitig (Ii-awiiigs iii. which- 75 Figure I is a side elevttlon slioAviii@,: tli(3 varioiis pti,ts of the app@ti-,itiis @iii(I iii(ii(-atin(y cei-tain si(rnifi(-ant feattii@es of tlieiilocation and relative ai-raii(reiii(@nt: Fl(,,,tire 2 is i N-ertical sectioii sl)(ilN",iD(r tl)e 80 piimping (tnd the resei-N,oit, (@)I)ei-,Itillo. anism tlierein: Figiii-e 3 is a section on the Iiiie 3-,i, Figure 2, Figure 4 is a section on the line 4---,L F"g- 85 ure 2; Figure r) is a section on the Iiiie 5-,,-), Ficrtire 2 Figlire 6 is a lon(,itliditial sectioiial N,iew of the iralve 9, Fi(yiire 1; 90 Fi(-ure 7 is ,t N,-ertical long@itu(Iinal se(,tion of the c@irt)tlretet, of Fi(,tii-e, I ancl. Figure 8 iq a qimilar view of i iiio(lifi(-,itioti. By i-efei,en(,(,, to Fi(yiire I it will be seen 9b that the svsteni coinl)i@ises i loiv level tank 1. which mty I)e tli(, gisoline siipplv tank ciarried oi) the i-eir end of an automobile. It is provided Avitli a filiel- cap 19 in whicli is an air vent 20. A lift I)ipe 2 htvin,(,r ,in loo inlet for liqtlid an(i also@inlets 21, 22 at'(1@fferent levels extejid t;l)wii-dly aD(I I)orizODtallv to the lii(,h level service i-esei-voiitnd vac'u; um pumping cliambei, 3. This (-hanil)eicommunic,,ites tl-ii,oiigl) valve c,,tslng 4 ancl 105 pipe 5 -,vith the intake. nianifol(I C) of aii internal combustion iiiotor of tiiy known oidesired type. The stictiod, stroli:es of the engitie cause a vaciiiiiii in tllis manifojd wliieh varies witli the speed of ttie motor i i 0 and the adjustmeiit of the tlii-ottle valve 7. These variations may I)e N,ei-i7 w'ide since ivitli li(,@lit lo@ids tl-ie ihrottle m@ty be nearlv closed ivliile the speed of the iiiotoi- is vei,v Iiigh and con-,-ei-sely Avith li(,aN-y loads, th . e lis throttle may be wide open NN,Iiile the speed of the motoi- nia-v I)e N@ei@y slow. A (,,trbtiretei@ liiving a float fee(I chaniber 8. is located ,it the iiitake end of the intake manifold C) at a level al)ove that of the tank 1 20 I and below tliit of the sel-vice reservoii, 3. The flow of li(Itild ftiel aiid its It@vel, within the float clianil)ei-, ai,e, govei-ned -,-,,itliin limits bv the float 8' wliieli rises an(I falls witli the level of the li(Iiiid ind operates throtigli i25 ]ever 13 pivoted @it 14 to open and close the inlet valve 11 seeiire(I tliei@eto by t ball tnd socket coiiriectioii 12. @A- vent 10 in the top of the carbiireter float chambetcorriiilunicates witli the atmosphere and operates to 130

1;430,038 13 maintain at-mospheric pressure within the float chamber 8 reg ardless of the changes of level of the liquid therein. The float chamber operates to mainttin an approximately c6nstant leyel of liquid i-.ead-v to be sucked into the carbiireter jet 41 inhich is adjustable by needle 40 controlled by thumb-screw, 42. The above or other desired means for bureting the air and controlling tho level of io liquid in the float chamber may be empl6yed. 'The liquid flo-ws by gravit-y from the reservoir 3,' through pipe 15, valve casing 0 aiad pipe 18.to the carbureter float valve 11. The valve casing 9 is shown as comprisi@nc, i5 screwthreaded sections,, one c,ommunicatiELg with the pipe 15 and the other with the pipe 18. It is located well below. the level of the reserv6ir 3 and preferably below the level of the lq,-iid in the carbureter float 20 chambei- S. @ Tlle movable valve elen-ient consists of a pla:te I't adapted to cover the inlet from'the pipe 15. This plate is very light and hangs vertically upon the headed guide ,ins 16, 16, which extend horizontally p 25 t@ro'ugh and loo@ely engage perforations in the plate. Thus arranged, the valve is neutral in the sense that it has no selfclqsing tendency, yet the slightest reverse flow of the liquid will force the plate backward, 30 and, by reason of its- loose on ns 17, it instantly and' perfectly a plane to the plane of the inlet openi thereby iiiakin,& a perf@et seal and preve iii,), all back flow of liquid except the sli 35 initial flow which is necessary to seat it. Since pumping of the gasoline from the lo-w level tank 1 throu@h the lift pipe 2 a6pends upon suction applied'to the reservoir val ve stein 33. The valve has a central n tu(Iinal perforation open to ttinos'o " I)h e'-i-iie pi,essiire at the til)per end aiid coinmti nicating with the iiitei-ioi- of the reservoi r 3 at the lollei- end. As a iiieans for 70 cut ting off this - coiniiiunicttion I provide ,t sl.idiiag sleen-e 34 ivhich is no'rinally lield in a position to close the air inlet by pressur e -of spring 38 -,vliieh encircles valve ste m 33 and beai,s against the under side of 75 8- alve 36. Any stiitable means iiiay be employed for op eratin(y these i,ali,es to apply the stiction an d cut. @off the air so as to create a puiiiping vacuttiii in the reservoir and when i. 80 stif ficient @-tipl)lv lias I)een piiinped to citt off the suction' and admit the air. The me ans shown in the di-aiN,in(y co'mprises -i rad ius arm or lever 29 havin@ one ond bifur cated and pivo'Led to the yoke 19. The 85 fre e end loosely engages the valve steiii 33 between the sleeve 34 Nvhich is pressed down-%vardly against it by the sprincy 3S and a supporti@g wash6r 35 held by a cotter'pin 43 ivhich'passes throtigh the valve go stein. fn Figure 2 the free end of lever 29 is shown in the lowerniost position -NN,here the air inlet is closed bv the sleeve 34 and the valve 36,.37 is op@ii. When the levet 29 18 95 moved up however, it is obvious that the valve 36 will be forced against its seat 3 i' thereby cutting off the suction and then further movenient; of tb.e lever 29 in the same direction will serve to slide the sleeve loo 34 upward from the air inlet openincr thus establishing communication witb the ta'tyilosphere and relieving the vacutim within the 3 froni the vacuuin in the intake manifold chamber 3! 40 61 'tbe rapidity of pumping @ as well as the 'The lever 2.9 is moved up and down to 105 height to whi'ch the liquid may be pumped effect. the above described inovements of dt@ponds upon and varies with the de, ree the valves b 9 y ineans of a float 24. This of such vacuuni. During ordinary noriyial - flo,at is g@ilded upon a vertical downward operation,@this vacuui@i is hig@ and -while extension of the inlet pil)e 2 and ri es and 45 this operates to pump up liquid very rap- falls with the changes of level of the liquid 110 idly throulyh lift pipe 2. it also operates to within the reservoir. The float actuates prevent tl;-e liquid froin'discharging down- the lever 29 throu-h the movei-nent of a wardly by gravity through pipe 15.. Heiiee, second radius arm or lelter 28 wllieh., like it.is necessary to provide ineans for break- 29, is bifurcated and pivoted to the yoke 60 ing the vacuum and restoring atmospheric 1.9. The iiioveinent of the lea@er 28 is com- 115 pressure within the reservoir 3, whenever municated to the lever 29 otily throii(,Yli the the liquid therein has been pumped to a mediuni of sprina 32 which extends cles'red niaximum level and to reestablish strail-it across beti,@@en theiii. The b'ftirh the vacuilm -anid re@ume pumpiiig w enever cati@'iis of the tin@o levers a.nd the @,oke-florm 55 the liquid falls below a desired minimum of the pivotal support altords space for free 120 le-,7el. So far as concerns the brodder fea- play,of the levers -witliout da,ngei, of bringtures of my invention, any known'or de- ing the intern-iediate portions of spring 32 sired means suitable for the purpose mity into contact witli any of these parts. The be eniployed, but more specifically consid@- free end of the lever 28 elig@ges freely be60 ered niy in'%Tention includes the novel means tween piiis 30 aiid 31 wliieh are slipported 125 shown in the drawings. by and niove witli the float 24. By reference to Fi.gtire 2 it will be seen The above described. pirts are well that, the connection 4 to suction pipe 5 is adapted for the above described norn@a-I a valve casin- fornied with a valve seat operati.on, wliere the iiitei-mitteiit pumping O'C@. 37 adapted to be engaged by a, valve 36 on and diiinpiiig are i-egiilai-ly iiiaint,,itned be- 130

1,430,038 eaiise the i-,ictitiifi is Iii@yli tiid il)plylng spee(lllv fills the t@ip-l@. This causes the flo,,it t(, 1-ise tlle"ebil lift;ll(' tlle free en(I of le\-ei- 2,@ tn(I aj)i)liiii(y td(litionil tenrj sl()Il to :3.-) iiiitil tli(@ Iiiie of tension I)ass(@,-, the I)IN,ot,,tl poiiit of levers and so t)ecollies effe(.ti@-e to siizll) LIPNN-ard the free (@ti(I ()f len-er ---)9 liftiii(r the valve cilttil)(@. off, the skiction. lil@tii)g sleeve 34 @71. 10 ti-ii(i adiiiifiiii!4 the t' ir. Tt ii,ill I)e iiote(I tiliit tl),,, 1)i-opot-tioiis of the le\-ei-s 2(S iii(i -2() - ,ii)(I the lo(,-,itioli of the frc@e eii(i ol' 28 -,vitli i-(@si)ect to its I)i%-ot ai-e pi-e(letei-iiiine(I --,@o (liat onlv a \-eri@ sliglit fall 1,5 ill the le\-el of the li(l@ii(i @@s re(litired to I)i-in,,, tli(@ sl)i-iiig il2 t)eloiv tlle I)iN@otal point of' le\-ei- )9 @iiid tliei-(@I)v r(@,.@tai-t the puttipThis gin-es a pi,edetei@niiiie(t'lii-lilevel aii(i a I)ie(letei@;iiine(I IoN,,@ lea-el iviii(,Ii at-e 20 (juite close to@,etli(@i- a,nd -,-erv short )unipiE[(r 1)(,I@i((Is in@lieii the piiii)l)iii(rvactium of Tioi-iiiil l@oAvei,. ks a restilt, the interior of i,esel-17(i 1- 'I@-is normallv iiiaintained qtiite ftill of tli(, li(Iiii(i zind iiij)st of the tiine tlils 25 liqiii(i is at atniosi-)Iiei-ic 1)1-esstir(@ and lien(,e i)erfe(!tlv fi-ee to flow down through pipe 15 @n(I ii- iAIiejtev@.r the e,,ti-t)u.-eter float i-ali-(, 11 is opened bi, 'it,- goat 8'. in aettial I)i-actice ivitli n"oi-iiial puii)p30 if)(r 1,,,Ictiiiin. tl-iere is iiever anv (Iiffi(-ult,y in riiaiiitaiiiing the i-eqtiired len@ef of the li'quid iii the float cliaml)ei, of tlie, cai,btiretei- 9. T71i(iei- the less tistial btit ilot tincoiiimon C(II(litioil desci,ibe(i al)(')ve. ivliej-e the iiiotor 35 i,,@ lin(le" lo@1(i Iil(l ol)el,,Itilil(' It lolv sl)ee(I Nvitli @i7i@le ol)en tl)i-ottle, the I)ttiiipin(r s sooti as it I)e,( ,)ecoiiies -,IoAvei@ ari(i a @omes too sloin- to sttl)l)INI tlle coiisuitiptioii of the II(Iiii(i f ' uel ]ii tlic@ the 1;qtii(I iii tli(,, 40 i,(@serN-olr 3 iiistet(I of bein(, i-el)lenislied b@7 tile ('Olltiniies to,fii]] iiotwitlistandiii,-, the 1)tiiiil)iii(, and the float 24 is jiot lifte(i to (-tit off tl)e sii(-tioii aii(i i-estoi-e at@. iiio,sl)l,ere. I)ttt i-eiiitins iii the loiv(@i- I)ositioti the SIIPI)Ill of li(illi(I iri the 'I is ,iib iect. to tf@(@ iipintj (I sit(,tion of ivliatever vacituni tli(,.i,e is iii the maiiifol(l, tll(""e (,oll(lltlolls, ITIV illlr('IltiOll I'Cll(lers anailal)le for (IoNvii floAA, tiiroii,,,zi tl)e 50 I)i])C to ti)(@ the entii-e (lonteiits of tlle I-esel@N-oil, 3. As bcfoi-e exf)laln(,d, titis in@-olN-es t-,Yo (@xI)edieiits. Iiistet(l ol' jtist eiioiigli al)(@N-e the .5 5 twr to @i free (@i-aN,Itv (lis(,Iiat-(,e of the iii(I tlici-e is iio ;ii tl)(@ reser@ --ol. I @ i, .1 at,i,aiil(-(@ ttie at a coiisider-it)le heiglit so t.liit the (liseliarge eoliiiiin iiiaintai-ne(I iii tli(, pipe 1;'), will I)zti-c stiffi60 (-lent weig@ht., that is siifficiert lie,id to di,@iiv (i.owii 11(iiii.(i fi@oi-i-i tli(, i-eserN@oir ,vliile tliei,e Is i7et -a consi(lerat)](@ N-aciiiini AN,itiiiii the reservoir. At the siiiie tiiiie, I for adiii'ss'oii of air tlit-ougli aii;IL@ete 21, @).2 su dei-, fficien-t to coilsi ibly detli(@ i@e,@ei-N-oir flo@ill- (@iiiniei-ezis(, the NN-ei(rht, that is the hvdrostatif. I)et(l of the lift (-olujiiii of II(Itii(I in the uptalie I)ipe 2. B@- these ti\-o I'a(,toi-s to suit the iiiiiiii-iiuil) oc(-iti@i-'ii(, iii pl@actice., I 70 iiii al)le to iiialie the (,oii(litioiis of 1)iiiiii)]Il(f 'tii(I (-Iiscliai-(@e il)l)i-oa(-Ii ea(-Ii otliel@ i-, i)(@ai-l-v zi-s iiian- t)e ii(@cessiito rriake the 1)i-acticall-v cojiet'iiilolls 1\" ile(I-ell, 75 I itli th@ iio'r-nial si'lpl)],y. Afo ' @vliei-e the coil(I-itions ai-e iiot too iinfiN-oi,- able, as for instaii(-e, Nvliei-(, the liel,,Yht of the cai-btii-etei@ al)oN@o' the loiv lei-el taiil@ is iiot too great, or the ai)iotiiits of air pi-actl(,allv tiseil)le In the lift (-ol(imn ti,e iiot 80 too 'small, or tl)e i)iliiimitm ptimpin(, N-aeiittms not too low. the coii(litions of i-aclitilli I)IIIIII-)ijio- aii(I )-i@ai-itv (,Ilseliai@(ye inay 1)e iiia(le to oN-(,.r@al) so @t'liat I)t'tiiipin(y and in(,, inan, t)e similltaneotis. 85 ID 'faet iiii(Ici- esl)ecialli' Ttvoi-able coiiciitioiis, I lian-e demonstrate(] that the on-erlal) niiv I)c, ma(le so (,reat that the disebai-(re I)i7 ",)-i-ai-ity will becoiiie an-aiiil)le A-viiile the I)tiiiil)in.-I i-aciiiini I-, still stifficleiit to siipl)lv 90 the (!arbiireter (leiiiand. Ftii-tliei-moi-e. un(leil extreti-ie conditioiis, tlie, siiittiltaiieotis I)ttiiiping aiid diiiiil)lii,,)- ol)ei@atiori niay be i-iii(le the iistia ' I metliod of operatioil ol the sli,stern, in ivliieli case tite interiiiittent citt-off it)cl 95 puilipiii,, methocl Avill becoiiie the tinlisital or eniergency method. In iiiost cases, lioivei,or. T pi,efer that j.-esei@@roir 3 slioiil(I coiitiin a , siiffleient (itiantity of liqtiid to sul)l)ly the (@ii(riTie (]tiring,, a low 100 N-actittiii l@ei@iod oven thoil(rli the con(litions ii@e too ii;@lav(ii-al)le to I)ei-z iiiit of anNi-el)lenisliment'l@y piimpiii@-, diii,iii,-, that I)ei,lod. As aii illiistrtttioii of iiii,- nietliod of operation, Ai,e miy considei- flie cise ivliere the 105 flottt lias beeii set to apl)]A- the sue-tioii and stai,@ I)Ilmpincr 1,N,Ileii the 11(juld iii the reserN-oii, '@ lias falleii to the lei-el indicate([ by tli(, (lotted line X-X,, Fl(,,ui-e 1. This level iii@in- 'k)e, say 12 in(-lies il)oN-(@ the (lotteci line lio@ I -Y, Ai,liieh is a-,stiiiied to iii(licate the inorii)al ]en-el of liqtild iii tli(@ cai-biireter float CIILnil-)er @. Tt is ol)N-iotis that wlienen-er tl)er(, is les,,, tll,.iii a l@-) in(,Ii i-aeiium in the iiianifol(I and i-esei-i-oir 3, tli(@ N%,e'l(,Yh,L of tile 115 soll(I ,asoliiie (,,oliiiiiii froiti X-X to Y--Y will oi-ei--balai-ice tl)e liftin@,- sii(-tion l'il the i-esei@voli- aii(-l the ii(Iiiid ivill floiv cloiinn@rard iiito the @art)tti@etei, float chaiyil)er 8, uriless I)reireiited by closin(,- of tlle, \-alve 11. 120 1)ose then that the lift f@.,om Z-Z. - NA-Iiieli is stil3posecl to be the level of tll(@, I;qtii(@] iii the i-ear tank, to the tol) of the 'lift pipe @) be, sa@, 20 inches. If tlieii the air adrnitte,,l i.nto the lift colttiiin tlii-ott(,Il tlle L'o125 strieted openii-i- 21 eqt-ials, s,,tv, tli,, ),oliime, of (,asoliiie iii the 1)il)e 2. a vt(-iiiiiii @-:f 10 iiicl)es ivil,l I)e siifficleiit, to I)timp lisiii,i i@ii) iiito the resel'17(jr. Conseqiieiitl\@, t] e vaetzum i ii the, reservoir 3 is greater tlia.,,.