US1066080A - Carbureter. - Google Patents

Description

oFFIoE.

PERCY FRANKLIN COLE, OF NE'vV YORK. N. Y.

CARBUBETER.

Appucation sied August 12, 1910. seri-a1 Nef 575318.

To all 'whom it may concern:

flo it known that l, lnor Fimxums Conn, a citizen 'of the United States, and a resident of'the cit)r of New York, borough of Manhattan, in the county and State of New York, have inrenteda new and Improved arbuieter, of which the following is a full, clear. and exaet description.

This invention relates to certain improvements in earhureters adapted for use in (ainncetioii with internal combustion engines, and relates more particularly to a simple type of carburetor in which the. air is caused to pass a vrporizing'nozzle on its way to the engine.

The main object of my invention is to simplify the. erlrliureter by eliminating' the lloat chamber vaud ioat valve commonly ein ployed7 and to auttmuitieally control the flow of gasolene or other liquid fuel in aeeordA aneewith the suction pressure of the engine. ln my improved carbureter, l provide an air inlet valve which is opened by the dill'erenee in pressure. upon opposite sides tl:e1eot,in

other words, b v the suction pressure of the engine, and so connect thisvalve to al valve controlling the liquid fuel, that when the air inlet valve closesE the liquid fuel valve will also close to prevent any waste of the fuel, and the extent to which the liquid fuel valve is'opened, will be in direct accordance with thesuctio'n pressure exerted at the air, inlet valve.

A furtherimportan't feature of my inven"A tion relates to the means employed for pre- A venting injury to the earbureter or connections'in case of back tiri Reference is to be had to the accompanyl inr drawings, forniing :1 part of this spec-itication, in which similar cl'iaracurs of ret erence indicate eoriespomling 'parts in all the figures, and in whieh- Figure 1 a longitudinal section through a carhureter constructed in accordance with my invention, said section being taken approximately on the line 1-1 of Fig. 2; Fig. 2 is a top plan view of the earbureter; and Fig. 3 is a. transverse sectioi'i on the line 3-3 of Fig. 1.

1n the specilie form of carhureter illustrated in the accompanying drawingst I provide a main body or casing* havingtwo arms or branches 10 and 11, substantially at right angles to each other. The mein branch 10 is substantially cylindrical in form and is adapted to normally occupy a vertical posi- Specication of Letters Patent. i

position.

and fuel admittedl to the` carburetor.

.-Stem, but also a tion. At the upper' end ot thi's branch, is an'apertured flange 1Q.` by means of which the earburcter may be connected to the inlet pipe or the filler port of the engine and at the lower end is a closure or end wall 1.3 carrying the fuel inlet nozzle# As lillustrated, this end wall has an upwardly-ex-v tending' nozzle. 14 intothe upper end of which seats a valve 15, which extends centrally and longitudinally of the branch pas- 10. Liquid fuel may be delivered to the nozzle through a. 'passage 1G, Awhich may be connected at its outer end in any suitable manner, to a fuel supply pipe, and which may be controlled by a suitable needle `valve 1T. The branch 11 extends substantially at right angles to the-branch 10 andl is normally disposed in a substantially horizontal '.l`he two branches eoimnuliieate adjacent the lower end of' the. branch v10, opposite to the nozzle 14t and the branch l1 upon its. upper faee, has an air inlet portlS, through which air may enter to the branch ll.A and thence llow through said branch to the branch l0, past the nozzle 14'; and out the upper end of the branch l0 to the engine. This port 1S is controlled by a valve plat/@'19,

4 secured to a valve stein 20, which is normally 'pressed upwardly by a coil spring 21. A

Encircling the coil spring 21 is aheavier spring 3G, the lower side of which rests on the cap 23 and the upper end .of which spaced a slight distance -rointlie collar 9A when the valve 19 is closed. This varrangement of two springs will give better results than merely using the ne spring 21, for the reason that the fine spring'may'be readily actuateu by the slight suction pressure in the carburein. starting the motor, and' thisspring also allows themotor to throttle downnine-li slower. v hen the motor has gained the proper speed, the Sleeve 2i, due to the incre-asedsuetion lfrom theie-ngine,

will come-down a greater distance rthan at first, contacting with the. heavier :spring 36 which will then control the amount otvair The valve stem iS guided at its upper end, in a Suitable spider 22- of slightly larger diameter than the diameter of the valveplate 19, so that as the ralve 15 wears down. the spider will not prevent the-positionne; ot the valve 22 on its seat-. and atY its lower end extends tl'irmzfi an adjustal'ile cap *23, whirh" constitutes not only a guide fort-he Yahe stop vfor the springs 21 and 1 .vers

V36.l By. adjusting the cap, the tension of vtwo"substantially parallel side members 26,

connected by a plurality of Vintegral cross bars and apertured to receive a trans- "Lplvot pin 28,' The pivot pin may be moun d in thesides of the branch 11,A and "Vt'liegsiid'e members of the leverat each end, are spaced apart to engage between flanges on-the collar $4, and between [langes on the.

fuel valve 113. The fuel'. .valve may be guidedv by a collar'29 threaded to the upper end of the nozzle. 14 and having an inverted U-shaped standard 30 apertured at its up per end to receive'the' up er end of the valve stern. A spring 31 may e employed in connection with the. valve 15, to hold the latter in its closed position.

The parts normally occupy the positions indicated in Fig. 1, that is, both the valve 15 and ,the valve. 19 are closed. As the engine is started, the suction will open the `valve 19 to admit air to the carbureter, and this downward movement of the air valve will automatically raise the fuel valve 15 and admit the necessary fuel. to 'the air passage. As the speed of the engine increases, the valve Willbe openedto a still greater' .extent, and -the extent of movement of the airvlve will accurately govern the extent of movement of the fuelA valve. The speed of the engine may. be governed by a 'suitable throttle valve 32 in the branch v100i? the casing. Opposite the air valve 19, the branch ll'has a wall 33 normally. stationary, but

l capable of moving downwardly to form an outlet in case of back fire. -As shown, this end vall 33, which constitutes the emervency outlet valve, is guided-by a plurality o? pins v flgand is held in place by coil springs 35 mounted onfthese pins.

` gases to escape.

These springs are stronger than the spring 21, so that the outf let valve' .3B is normally held closed, but in case .offhaclr fire, the pressure within the' vcarb'lireter will be sulicient to force the wall 33 downwardly an'dall'ow the high pressure At the same. time, the lneedle valve 15 will be held against its seat, so that the pressure .cannot be communicated back through'to the fuel supply tank.

Various changes maybe made in the construction and operation o the specific carbureter illustrated, Without departing from the spirit of my invention. i

Having thus described myinventinn, l claim -as new and'desire to securaby Letters Patent:

1. A carbureter havixigla casing provided p `port andfemerfgency port, springv mea 4.closed positi'on a valve. for .closing saidV endv on said from the eri `ne willclose said valves and open the sai -from the engine will simultaneously open with` an `air inlet port Aand "an emergency loutlet port, disposed opposite to each other, al valve closingthe air- :inlet port, 'a valve closing the emergency outlet portA and separate springs for'hol'ding said valves in their 0. closed posit-ions, one of said valves constitut ing a guide for the valve stem and 'a stop for the spring of the other valve.

2. In a carbureter, a casinghaving a fuel inlet port, an air inlet port, and.. anj75' emergency port. opposite the air inlet port, valves v'for c osi'ng' said fuel` inlet;

said-valves normally `111;

for .maintain 'v air inlet: pont,... a spring mounted -on .the stem -ofp'said valve and bearing at one end on thelernergency valveand at the other y stent to normally hold thek air inlet valve in'closed position, connections 35 betweenthe air inlet valve and the fuelA feed valve whereby suction v pressure from-.the engine will simultaneously open said air inlet 'valve and said Aeedva.lve,fand pressure emergency valve.

3. In alcarbureter substantiallyAL-shaped in cross section, one arm of said L constituting an inlet to the' engine, a feed valve positioned in line withV said inlet, spring means g5 v-mnintaining saidf`val;ve in closed position',

an air inlet port in the 'other of vsaid arms, an emergency valve ina said .other arm, op# posits the air inlet port, aA valve .normally closing said air inlet po'rtthefstem of said valve carried .bysaid emergency valve, a coil spring bearingf at one `end onsaid emergency valve-'and acting on said st emoff the air inlet valvel to maintain said `air inlet valve in normally closed position, av collar mounted on saidsteni, and a lever fulcrumed intermediate its-ends, having oneendV engaging said feed valve -andits opposite end en` gagingvsid collar, whereby suction pressure said air inlet valve and said feed valve, and pressure from the engine will closesaid valves and open said emergency valve.

4. Inv a carbureter substantially L-shaped in cross section, one a'rm of said L constitut-v ing an inlet to the engine, aliquid fuel noz'- zle, means for controlling the amount offuel passing to said nozzle', a feed valve eirtendirig icentrally and longitudinally of said inlet and controlling the discharge from 1243 said nozzle, spring means maintainmgsald valve in closed position, an air inlet port in `the other of said arms, an emergency valve in said other arm disposed op Voffsite the air inlet port, a valve normally c osing said .air inlet port, `the stem of said valve having guided movement in -said emergency valve, spring means surrounding said valve stem and bearing on said emergency' valve7 nf tlie air' inlvt valve lo mainlnin said nir inlet valve in normallyY ('lofml position, a. millar' lnnnnlml nn snirl stvm. :l lrvvr fnlrrnmed intvrinwlinlc itx n-nds. having one 9nd f-ngaging said fwd wlw :unl ils umm- -itv Mnl vngzlging .said 'rvllzn'. wln'llvliy sin tnn iii-www# from tlw nginf will simulmnmnl) nin-n said nii' inlet, vulve and said fvod valve. :1nd pressure from tlwy engine ill f'lnw mid valves and npvn mid einergency valve, :ind springs maintaining said i vnwrgnfnfzy valve in 'msitinin said Spi'in living strongvr than tlm springs bearing on thv vnwrgQ-nvy vulve and maintaining said nir inlet valve in pnsitinn.

ln tvstilnnny wlnrenf l llave Signed my nnnnte this pfI-ififfnlinn in the presen of iwi huliwrliing ilnwqwl IIRCY FRANKLIN COLE. Witnesses t "M. Umm' Hummm, EDWARD 'l`xrA'i m;R.

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