US1059501A - Carbureter. - Google Patents

Description

A. c. STEWART.

OARBURETBR. `APPLICATION FILED JULY13, 1910.

1,059,501 .Patented Apr. 22, 1913.

new: Imm. Incl, Llmov.. Maligno. D4 C,

UNITED l STATES PATENT OFFICEl.`

ALFRED C. STEWART, OF LOS ANGELES, CALIFORNIA.

oAnnUnErER.

Specification of Letters Patent.

Original application filed April 27, 1908, Serial No. 429,583. Divided and this application filed July 13, 1910. Serial No. 571,855.

To all whom 1' t may concern Be it known that l, Ummm C. Simmer,- a citizen of `the United States, residing at Los Angeles, in the county of Los Angeles and State of Calitor11ia,havc invented a new and useful (larlmreter, of which the following is a specification. p

The subject matter of the present application. was shown and described, but not claimed, 'in my application Serial No. 429563, filed April 27th.4 1908, of which this application is a division and continuation.

The main object of the present invention is to provide improved means fe .admit-ting gasolene or oil to the mixture chamber ot the carburetor under the control of a valve operated automatically by the suction ot the engine.

Other objects of the invention will appear' hereinafter.`

The accompanying drawings illustrate the invention and referring thereto: Figure 1 is avertical section of the carbureter. Fig.` 2a side elevation thereof. Fig. 3 a horizontal section on the line S-s in Fig. 1.

The casing 1 is formed with superimposed oil, air inlet and suction or outlet chambers 2, 3, 4 and `tuel is supplied to the oil chamber `througha. pipe 5, whose outletV is controlled by a valve 6earried by a llever 7, operated by a float `8 in the oil chamber, to maintain a definite level of oil therein. Valve 6 is in a chamber 2 opening laterally from oil chamber 2. Valve member 9,

`Whose conical face corresponds with and rests onthe u Wardly'laring wall 4 of the suction cham r has a stem 10 working freely in a guide tube 11, the stem having 4an `extension 12 passing loosely through an 4o l opening 13 `in the bot-tom of the tube 11, so as `to allowrestricted 'passage of oil, the tube serving as a dash pot for the valveV stem, which Works as a piston thereon. Said stem is formed with an interior chamber 14, forming an oil reservoir, communicating with the oil chamber througf. a bore 15 in the'e'xtension 12, and an ad)astable needle valve 16 screwing through the bottom of oil chambery 2 has a looseneedle 25 which pro jects into this boreto control flow of oil therethrough. Interior chamber 14; also communicates through an opening 17 with a channel 18 in the Wall of tube 11, said channel surrounding the valvestem 10 and cornmunicating through opening` 19 with the upper` part ot oil chamber 2, which is Open to eommunieation with the outer airby an opening,r 20. A tube 2l screws into a screw thrtauled bore ot'` the valve men'iber 9, and extends down into inner chamber 14;, the upper end of said tube havinga bulb 23 and constrictcd opening 24 for atomization of the oil. By turning tube 21 the distance of its lower end from the bottom ot chamber 111; may be adjusted. lVhen the engine is at rest the oil will be at the sanic height in the interior chamber 1t as in the oil chamber, and will extend above the bott-om oi tube 2l, and when the engine starts the fluid will be sucked up through tube 2l until the level tails to the bottom ot'. said tube, thus flushing the carburetor to temporarily enrich the mixture. ln normal operation, the suction is suilieient to break any liquid seal that` may form at the bottom of tube 21, and to keep the oil level at the bottom ot said tube., and the amount ot oil supplied is determined by the head or difference in level. between the bottom of tube 21 and the oil in chamber 2, and enough air will pass in through openings 20,19. 17 to pass up with the oil through tube 21 to provide air in proper amount for ejeeting the oil from the well as required for steady running. for example at maximum output (incapacity. this being deterw mined by the size ot opening 17. The channel 1S prevents sucking ofgasolene up` through the space between the stem and the tube', so that the, stem may work freely and with slight friction in the tube without leak` age ot gasolcne into the air inlet chamber 3. As the valve member 9 rises, it varies the height of tube 21 and thus diminishes the feeding head,`but this may be compensated i by properly shaping the valve needle 25 of valve 16,4 said needle being tapered in such manner that? in the elevation of the tube 12 the opening between the needle and `said tube increases sufficiently to compensate for this loss of head.

Throttle 26 controls admission ot air to air inlet chamber 3 and by its closure regulates the suction and air oil feed. Y

The above described construction provides a carburetor in which the oil is supplied to the mixture chamber in the most advantageous manner as it rises to the center of the v alve and is distributed equally in all directions. By the provision of the central looselv mounted valve `member 25, I am enabled to `use thewalve `stem .of the air valve as the meanszfor controlling theoil .supply,' the' i said member 25 adjusting .itself automati- 4 callyto anyjua'ccuraoy in centering the parts, lsuch as 41s hable to arisem such a construc- Tube21, .iwellvlandfbore constitute'av passa e 'for establishing communication from the needle'valve 25 is' adjustable longitudinall in said passage to control admissi'onof oilt erethroughand,bein loosely mounted,

le' movable laterally in said opening toad# just itself thereto.' What I claimis'f: f

1.' In acarburetegn casing provided with' a mlxture chamber, air inlet means, an oil chamberya 'valve controlling communication from said airlinlet means to said mixture chamber, anrhprovided with a passage or' establishing communication from said oil chamber to said mixture chamber, said valve 4being movable in responseto the suction ,in

'the mixture chamber to control the admisy 4sion of oil thereto,iand a longitudinally adjustable member coperating with said passagein said valve to control admission oi' oil therethrough, said longitudinally adjustable member being `mounted to move laterally 'withinsaid opening to adjust itself thereto.

2.r In a carburetenav casing provided with `a mlxture chamber, air inlet means `and an oilchamber, a tube extending .within said casing, a valve controlling communication of air from said air inlet means to said mixture chamber, said valve having a stem'slidably mounted in said tube,said valve and valve stem being formed Witha passageV commu# :nicating at-its lower end with the oil chamber, and communlcatlng` at its vupper end Gopies. of this patent may be obtained for five cents cach, by addressing Washington, D. C.

chamberto the mixture chamber, and

Loaaeoi with-the mixture chamber, and avalve adjustably mounted in the bottom of the cas- 111g, and coperatingwith'the llower end of sald passage to control lSupply of oil therethrough, said tube being provided with vmeans for admission of oil thereto, and said valve stem Working as a' piston therein, whereby thetube serves as ak dash pot for the valve.

i 3. In a carbureter for internal combustionI engines, the combination of a casing having an'fai'r inlet, a vertically movable Weighted valve which is operated automatically by the. enginesu'ction and controls theadmi'ssion of` air tothe carbureter, said valve having a hollow'stem forming a` gasolene supply passage Which is movable with said valve, a

valve which cooperates with saidv passage for aregulating the supply of gasolene, and

means for steadying the movement of said l Weighted valve, substantially-as set forth.

v 4.-. In a carbureter vfor internal "combustion" engines, the combination of a mixing chamber, a gasolene chamber, a Weighted valve which is operated .automatically by'. the-err;

gine suction andcontrols the admission of air to the mixing chamber, lsaid valve having` a stem with a l asolene passage entering the gasolene cham er and4 a connecting d1s-` charge duct, means coperatlngwith said 4passage in the valve stem for regulating the y i feed of the gasolene, and means coperating,

the Commissioner of Qatent,

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