US1454730A - Carburetor - Google Patents

Description

May 8,1923; 1,454,730

C. DE LUKACSEVICS ET AL CARBURETOR Filed April 7 1917 Patented May 8, i923,

units (stares titans CHARLES DE LUKACSEVICS OF NEVJARK, NEW JERSEY, AND JULIUS J. W ITTAL, OF NEW YORK, N. Y.. ASSIGNORS, IBY MESNE ASSIGNMENTS,"TO JULIUS WINTER,

NEl/V YORK, N. Y.

Application filed April 7,

T all whom it may concern:

Be it known that we, CHARLES on LUKAC- I ssvios and downs J. WVITTAL, a citizen of the United States and asubject of the King of Hungary respectively, residing at Newark, in the county of Essex and State of New Jersey. and New York, in the county of New York and State of New York, respectively, have invented new and useful Improvements in Carburetors, of which the following is a specification.

This invention relates to carburetors internal combustion engines and its principal object is to provide a carburetor casing applicable to various types of construct on which will avoid loss of fuel by condensation within and upon the walls or exposed surfaces through which the fuel or fuel constituents pass, which will insure the delivery of the propervolume of fuel at the desired temperature to the motor suction tube, and in which the flow of the combustible mixture through the carburetor chamber is facilitated. These objects are achieved by making the casing of the carburetor, as also its essential parts, of non-conducting, non-combustible and non-corrosive material. It has been discovered by experiment that a material made of a phenolic condensation product formed by combining a phenolic body with formaldehyde has all. the properties essential to the attainment of the objects of the invention. The product in question has various trade names, of which the best l 'nown probably balzelite, and in the further description and in the claims itis to be understood that the term bakelite, which is now well. known in the art, is. tobe taken as a generic designation of the phenolic condensation product referred to.

Apart from its requisite physical properties, the use of bakelite enables the surfaces which are exposed to the hydrocarbon fuel to be of exceedingly smooth finish and thereby the flow of the combustible mixture through the carburetor is facilitated.

The accompanying drawings illustrate a constructional form of carburetor in which the invention may be advantageously carried out.

In said drawings. .7

Figure 1 is a vertical central sectional view of the carburetor.

for

CARBUBETOR.

1917. Serial No. 160,524.

Fi ure 2 is a sectional view showing a 23 g: modification 1n the construction of the air valve.

Similar characters of reference designate corresponding parts throughout the several views. a

In the embodiment shown, the carburetor has a central carbureting chamber 1 which is deflnedby a cylindrical wall 2 and is open at its upper end to the motor suction tube (not shown) and at its lower end to the air inlet.

As shown, the carburetor has its float feedcompleted vby an intermediate cylinder 5 having a sleeved relation to the wall 2 and an outer cylinder 6 having a sleeved relation to cylinder 5. The cylinder 5, which maybe of metal, rests upon the base of the float feed chamber and projects beyond the top of said chamber, its projecting upper portion being; threaded into an attachmentflange 7 of the usual form. The cylinder 6 is of bakelite and is integral with the. top of thefloat feed chamber from which it depends. Said cylinder 6 terminates somewhat short of the base of the float feed chamber and its inner circumferential face is formed with vertical grooves 8 which serve as fuel ducts and ator neartheir upper ends communicate with angular passages or spouts 9 drilled obliquely through the cylinder 5 and the cylindrical wall 2 and forming the discharge terminals of the fuel ducts. The grooves 8 and the passages or spouts) are of small diameter whereby the fuel will be delivered into the carbureting chamber in the fornrof finejets and in a finely divided condition The construction shown isequipped with. a throttle or engine feed valve 10 i which is located in the carbureting chamber and may from said seat.

be of the conventional butterfly type. The spouts 9 are located under the valve 10 and at different levels.

The spouts are exposed or closed relatively to the carbureting chamber by cylindrical valve 11 which has a close sliding fit against the wall 2 and is moved upward to open the spouts and downward to close them. It is preferred, however, that portions of the lowermost spouts should be always open and the lowermost position of the valve 10 is se lected with this result in view.

For the purpose of air admission, a cage 12 is fitted against and below the base of the float feed chamber in concentric relation to the carbureting chamber. The said cage is provided with air inlet openings 13 and above said openings with a valve seat 14 cooperating with an air valve 15 of dished form which, in opening, moves upward away The effective area of the openings 13 is regulated by a valve 16 fitted externally on the cage 12 and provided with an operating handle 17 and openings 18 which, by the turning movement of the valve 16, relatively to the 12, may be caused to register more or less, as desired, with the openings 13.

In the embodiment shown. the valve is connected to the valve 11 by rods 19 where by the valve 11. will directly derive its operation from the valve 15 whose operation, in turn. is controlled by the prevailing suction influence within the carbureting chamber as regulated by the position of the throttle or engine feed valve 10.

The valve 15 is urged towards its seat by a helical spring 20 for the mounting of which acentral hollow stem 21 is provided. The stem 21 has its upper end secured in a spider 22 which is conveniently provided at the lower end of the cylinder 5. The stem 21 extends through central openings of the valve l5 and cage 12 and below said cage is termed with a bearing flange 23. Said stem encloses a bolt 24 having at its upper end radially projecting arms 25 which operate in vertical slots 26 formed in the stem 21. To avoid any weakening effect incident to the cutting of the slots 26, the stem 21 preferably has at its upper end a reinit'orcing plug J.

The bolt 24 projects downward below the cage and has mounted on its projecting end a cup 28 backed by a nut 29 and enclosing a helical spring 30 which bears against the flange 23. The spring 30 is weaker than the spring 20 but is normally under higher tension, and the spring 20, in the closed position of the valve 15, as shown, is practically fully expanded.

The suction of the engine will act,'first, on theweaker spring 30 until the limit is reached by the contact of the upper edge of the cup 28 with the flange 23 and, with a constant moderate suction, the parts will remain fairly steady in this position, thus substantially eliminating the vibration of the air admission valve usually present in simi lar devices. lVhen the suction is substantially increased, the spring 20 will come into play, restoring the valve 15 to its normal position as soon as the stronger suction ceases, thus affording an automatic control of the air admission by the n'ianipulation of the throttle or engine feed valve 10.

According to Figure 1, the cage 12 is made of bakelite but the valve 15 is of metal.

The modification shown in Figure 2 differs from the construction above described in thatthe valve 15 is of bakelite.

It is preferred that certain parts of the carburetor casing shall be provided with filaments 31 and with binding posts 32' for connection with an electric circuit whereby the filaments may be heated. The heat thus produced in the spaces defined by the walls of the carburetor casing will greatly facilitate the volatilization of the liquid fuel and will also prevent the condensation of any moisture enterin with the air, in case the air isadmitted at the prevailing atmospheric temperature and is not preheated.

lVe claim as our .invention 1. A carburetor for internal combustion engines having a body including a carbureting chamber, means for admitting fuel and air thereto, said body being termed of a phenol condensation product.

2. A carburetor having a body composed of a phenol condensation product and hav'-- 111g inner and outer walls forming a fuel chamber, said inner wall being grooved and having a wall in sleeve relation thereto forming a carbureting chamber. means for admitting tuel and air thereto, a metallic wall i11 terposed between said inner wall and the wall of said carbureting chamber, said metallic wall. and the wall of the carbureting chamber being provided with angularly disposed ducts affording communication between said grooves and the carbureting.

chamber, and heating means embedded in said outer wall in the vicinity of said metallic wall, whereby heat may be conducted and distributed throughout said carbureting chamber. v i In testimony whereof we have hereunto set our han'ds'in presence of two subscribing witnesses.

CHARLES on LUKACSEVICS.

JULIUS J. VVITTAL.

M. M. Moron.

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