US1531424A - Liquid-fuel supply device for internal-combustion engines - Google Patents

Description

March 31. 1925. 1,531,424

. F. A. SMITH LIQUID FUEL SUPPLY DEVICE FOR INTERNAL GOMBUSTION ENGINES Filed Aprii 16, 1924 "Il I alf 6 10 Patented Mar. 31, 1925.

Ueii'iE-o Sr-TA-Ji-E-S PATENT Fei-ee.

"FBEEEBICK ETHER Si-Mi OEBB-SEDLLENGLSND- l Application lxedApIl 16, 192,4.

Sina-I, a subject-eli;y tlie King OEi-igland,

i'eadi'ng at Bras-ted, blie-nt,Y Englandyliave inventedeeii'ain new andusefull-improven'ients in Liquid-Fuelj Supply Devices *for internalflConibuSti-oii Eii-gjiiee. f

This invention is for improvements inet i'elating toliquid fuel supply devices` for-inteifnalfcombustionengines` andfliasg fon-its niai'n'object to provide;A a: silinplef iioilmofl de vice for; supp-lying a/ priming -eli-aigeof liqaid uel te the engine *foro-Starting' puiposes. Anotlieiobject "of 'the invention'ie topprov'ide means A-Wlieielay a primingcli-aigel-of liquid i'guel4 Valone i's'f folleivedl'by a-combusti- -lile mixture of fuel- -andai12 -or4 a-i'n Aa-lo ne, independentlyof vor -inconjunction-Withfthe iii-ain fuel Supply. The present invention also a-iins at Vprovid-ing simples device-[Which is-desiggned as an attachment for-usegwitli an o-d-inaiy Carburettor.

Accordingt0 a' primary feature of @the present invention*there-is provided a device foifjthc purpose above. set' forth comprising a:- ifeSei1voii-condui`t lia-ving an a-i'ri inlet-at one endl, means at'tlie other end' foi' attachniegnt to an' eng-ineinduction-pipe tocoinnu,-u-'nicate therewith at one orginele-,points therein* (pn-'theengi-ne side oftlietlu'ottle) andi m eans suoli las a-fuelfeedeorilicein ga-id iieserve-ii'eonduit adapted? to,l be: placed' in communication with; a# iid'ilfuel supply I( for exam-ple, the-` -iFloat-c'lianibei1r of; the, 4nia-inl cai'biu'ettoi') for, I Supplying l-iqii-id1A iiel` to said;- reseivoiig with? or; Witl'iont (mea-nsf' i501' shutting Voli atI Wil-l communication lieti-veen the vleser-voi?-coiiduit aI-1d" the.' induction pipe.v

',fccoifding to anotherfeature.,of tlie- -i'nvention, device as described.inl the preceding; paifagi'apli is 'provided---WitliA means' iol shutting eill atgivill coiiiiiiuinicati`on between the liquid-fuel supply vra-ii-d-tliel reservoirconduit;

Conveniently, *the reservoir-condluit takes the-foimof apendentfklejubewhereof" the end Vof one-limb is open -to--t-lie ai-'i-inlet and the etlieiv lii'nloA is-provi-dedY-Witlimeans lor connection tothe eng-ineinducti'onfpipe and a Auel' `feedY ori-lice communicates Witlr the tube L at poi-ntbelow`-tlie normall level of the supply' liquid.

' Otlieii' features oi' the inventionr will be hereinafter described andv pointed out intlie claims.

' Inl -theaccompanying drawings: -i-"Figuie l is al;perspectivevievvV of one-form of' app ara-tus with parte; tliereo broken away "In ftliisI view-- the device' is sli-own fattaclied "oany-engine,- poi'tions ,of

nozzle.

front-'- elevation 'ofi -a-netliel ffee to like parte.

described,- czoinpri'eee a tubular part 6'- vv cli constitutes a7 portiono' :the Areservoir-'conduit, and-'Which lei! ori-lice 7. is bell- ,iontlied and constitutes- 'tlie -a-ii in- 1 M v., W Y Y 9 across the, mouth'. The oiilice -opens -i-nto tliefilter elia-lieber IQ lia-ving euilialole; -g-agu-ze A shot-vn in*y aindtlais needle-@valve- 1GZ fon con-trolling thef flowv lof fuelltlufeiiigli thev o'iilieei 7'. The ,liead of the needlevalve is inilled andas provided'` With anotch 18 asceitainedv andi the clamp isl then-f tightened up. jiinjy temper-ary.adjustment ofthe-valve may aiiteiwaids be ina-de ley roeati'ngthe milled Aliead irel livelyte `the lingen-Which will always indicate the permanent setting position of the valve.

In the construction shown in Figure 1, the remainder of the reservoir-conduit is constituted by the U-tube 23, one limb of which is secured to the tubular part 6 whereas the other limb carries a two-way cock 24 through which communication is made by way of the tube 25 and the annular discharge nozzle (Figure 2) with the engine induction pipe 2G. In one position of the cock the tube 25 is in direct communication with the atmosphere by way of the .hole 27, and in this position the tube 23 is closed to engine suction. Figure 2 shows a convenient construction for the discharge nozzle which comprises a union 28 screwed into the induction pipe and having a plug 29 with a conical head 30 fined therein. A number of holes 31 provide passages through the plug to the annular space 32 between the head and the union.

With the arrangement shown in Figure l, it will be seen that fuel will accumulate in the tube 23 until it reaches the level of the supply, when the engine is not running or when the cock 24 is closed. When the engine is started, the cock 24 being open, a rich priming charge is supplied to the engine, which charge is followed by a mixture of fue-l and air after the fuel in the reservoir has been exhausted, because air is drawn from the inlet past the feed-orifice 7 and thus becomes carburetted, the device then functioning as a miniature Carburettor.

In the arrangement shown in Figure 3 the cock 24 is located below the fuel inlet and the reservoir is constituted by the cup 8 and the portion of tube above the cool; when this latter is closed. In this figure the fuel supply is indicated diagrammatically as coming from a small separate tank 33 which may contain a more volatile fuel than thatof the main supply. The supply of fuel to the reservoir can be controlled by the needle valve 16, I7. Obviously, this arrangement may be applied to any of the constructions shown.

Figure 4 shows an arrangement of the device for starting two engines; a particular application being to a large power plant, such as a marine engine, which has a small auxiliary engine for starting it. rIo the lower end of the part 6 of the fitting 5 two tubes 34 and 35 are attached, the small one 34 being arranged to serve the small starting engine and the-large one 35 the main engine. The tube 35 is coiled at 36 so that the capacity of the reservoir formed thereby is increased while at the same time the bore of the conduit remains constant. Above the cocli 24 the engine supply pipe 2&3 branches off to serve the induction pipe at two points; although any number of branches may be employed as desired. The above features are applicable to any of the constructions according to the invent-ion and are particularly useful in the case of large engines, the latter especially where a long induction pipe is used. The fitting 5 is provided with a pair of lugs 37 to which the reservoir tube or tubes may be secured by solder or the like as shown in Figure 4. In Figure l the tube 23 is shown away from the lug for clearness. Again, in Figure 4, the air inlet is shown as provided with a tube 38 through which hot air may be drawn. This arrangement is advisable in any case where the device is intended to be used as a permanent slow running means. When used on a motor car, suitable means may be provided for controlling the cock from the dash.

I claim l. A priming device for an internal-combustion engine, comprising in combination a substantially continuous reservoir tube having an air inlet at one end and means at the other end for attachment to the engine induction pipe to communicate therewith, liquid-fuel inlet to said tube, means for supplying liquid-fuel to said inlet, and a three-way control-cock between said inlet and the induction pipe, which in one position opens a port to admit air to the engine side of the tube and shuts off communication between the engine and the fuel reservoir so that air alone is admitted to the engine, substantially as described.

2. A priming device for an internal-combustionV engine, comprising in combination a substantially continuous reservoir tube having an air inlet at one end and means at the other end for attachment to the engine induction pipe to communicate therewith in at least one point, a liquid-fuel inlet to said tube, a filter-chamber communicating with said liquid-fuel inlet, means for supplying liquid-fuel to said filter-chamber, and a control-cock between said inlet and the induction pipe adapted to shut off communication therewith, substantially as described.

3. A priming device for an internal-combustion engine, comprising in combination a substantially continuous reservoir tube having an air inlet at one end and a spray nozzle at the other end adapted to communicate with the engine induction pipe, a liquid-fuel inlet to said tube, a filter-chamber communicatng with said liquid-fuel inlet, means for supplying liquid-fuel to said filter-chamber to iiood the tube when not under the influence of suction, a regulating valve adapted to control said liquid-fuel inlet, and a three-way control-cock between said inlet and the induction pipe adapted to shut off communication therewith andto open communication between the induction pipe and an air inlet port, substantially as described.

4. A priming device for an internal-comlijf) llO busti-on engine, comprising L in l combination a*` substantially continuousreservoir tube having a,removable-,cap iadapted toi, form 1 an ,airinlet ,at ,one end and lanannfidarspray nozzle; at` theol-,other end;- adapted-- ,tocomin nicate with theengine inductionpipe, a liquid-.fuel inletI te `said tube, a i-ltercliamberwcominunieati-ngwith said 1liquideiuelinlet, means .fcn s pplyin g I liquid-fuel to` said :ch-amber te. fined thetube, when not under :the .induence; Of-zsucticnf elmeg-nl ting needle-nave adaptedltoflcentrol said uidfuel inletand a tyhree-.w-ay, contnol-cock betweenj :said inlet andi L the, :induction pipe zal adapted; to:` shutl oif-co inraunication` :therewith andl to, .open` commi the ;i ,v u ctien pipe` and-an airinlet -.port, substantie lly' as described.

5 aA priming device-forman internal-combustion enOlne, comprising in combination pendentl` U; tube. hav-ing;goneulimbwepen to` atmosphere to constitute an 'air inlet, means at the end of the other limb for attachment to the engine induction pipe. to communicate therewith, a liquid-fuel inlet communicating with one of said limbs, and means for supplying liquid-fuel thereto from the float chamber of the engine carburetor, substantially as described.

6. A priming device for an internal-combustion engine, comprising in combination a pendent- U tube having one limb open to atmosphere to constitute an air inlet, means atl the end oif the other limb for attachment to the engine induction pipe to communicate therewith, a liquid-fuel inlet communicating with one of said limbs, and a three-way control-cock between said fuel inlet and the induction pipe, which inl one position opens a port to admit air to the engine side of the tube and shuts off communication between the engine and the fuel reservoir so that air alone is admitted to the engine, substantially as described.

7. A priming device for an internal-combustion engine, comprising in combination a pendent U tube having one limb open to atmosphere to constitute an air inlet and an annular spray nozzle at the end of the other limb adapted to communicate with the engine induction pipe, a liquid-fuel inlet communicating with one of said limbs, means for supplying liquid-fuel to said inlet to flood the tube when not under the influence of suction, and a three-way control-cock between said fuel inlet and the induction pipe adapted to shut olig communication therewith and to open communication between the engine and an air inlet port, substantially as described.

8. A priming device for an internal-combustion engine, comprising in combination a pendent U tube having one limb open to atmosphere to constitute an air inlet, a spray nozzle at the end of the other limb adapted cat-ion between to icommim-icate` with theiellgine ,induction pipe, a liq-ind-fuel inletcominunicati g. with Oneof .sa-id ,-limbs, a= filter-chamber -comm-unicati-ng withsaicb inlet, mea-ns fonconnecting saidA ilterfchalnber.,to co nu-nicate, with the float chamber ofithe-,carburetor,nf tlcng-ine, and., a` tlnee-wayi 4contrqolcoclr tween lsaid fuel inlet land the induction p adapted -to-,shut coinmunicationtl witl and; to open .communicat between, the-engine endian ,air iin-let pnrtsnbstantially. as described. L:

i 9.- .Ac priming-.device for ,an internal-combustion engine, @crimini-ng, incolubinaticn a pen dent-,- U.. itu-be` h ai with. a remouable cap, to .constitute .air inlet, a. sprayvnozzle `at theend of thebther limb fornttachment tothe engine induction pipe y,to communifcatev Yctherewith, aj; liquidfuel inlet .communicating withl one, 'of.v l, ljmbs, aegiilating I,valve Yadapted to `centrlol said'liquidlfuel inlet, and acontrol-cck between said fuel inlet and the induction pipe adapted to shut oli' communication therewith, substantially as described.

10. A priming` device for an internal-combustion engine, comprising in combination a pendent U tube having a perforated cap adapted to form an air inlet at one end of one limb, a spray nozzle at the end of the other limb adapted to communicate with the engine induction pipe, a liquid-fuel inlet in one of said limbs, a lter-chamber communicating with said fuel inlet, means vfor supplying liquid-fuel to said filter-chamber from the float chamber of the engine carburetor, a regulating valve for said fuel inlet, and a control-cock between the fuel inlet and the induction pipe adapted to shut oif communication therewith, substantially as described.

1l. A priming device for an internal-combustion engine, comprising in combination a substantially continuous reservoir tube having an air inlet at one end and means on the other end for attachment to the engine induction pipe to communicate therewith in one point, a liquid-fuel inlet to said tube, a regulating valve adapted to control said fuel inlet and means for supplying liquid-fuel to said inlet, control means operatively connected to said regulating valve in such a manner as to permit relative movement between said valve and said control means and pro-vided with means to permit, at will, bodily movement of the control means with said valve, and a control-cock between said fuel inlet and the induction pipe adapted t0 shut oliz communication therewith, substantially as described.

l2. A priming device for an internal-combustion engine, comprising in combination a reservoir tube having one end open to atmosphere to constitute an air inlet and means at the other end for attachment to fgfonej limb .provided the engine induction pipe to communicate therewith, a liquid-fuel inlet communicating with said tube, a boss on said tube, a needle Valve having a screw-threaded engagement in said boss and adapted to control Vsaid liquid fuel inlet, a milled head for turning said Valve, a sleeve rotatably mounted on said boss, means to clamp said sleeve to said boss, an arm secured to said sleeve and adapted to be rotated therewith vand a catch on said arm adapted to engage said milled head, substantially as described.

13. A priming device for an internal-coinbustion engine, comprising in combination a pendent U tube having` a removable perforated cap. adapted to form an air inlet on one limb, an annular spray nozzle at the end of the other limb adapted to communicate with the engine induction y pipe, a liquid-fuel inlet communicating with one of said limbs, a lter-chamber communicating with said liquid-fuel niet and' having* indicator thereon, a sleeve rotatably mount-V ed on said boss, means to clamp said sleeve to said boss, an arm secured to Said sleeve and adapted to be rotated therewith, a catch on said arm adapted to engage said milled head, and a three-way control-cock adapted to shut off communication between the fuel inlet and the induction pipe and to open up communication between the induction pipe Vand an air inlet port in the casing of said cock, substantially as described.

In testimony whereof I aflix my signa ture. Y

FREDERICK ARTII'UR SMITH.

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