US1013082A - Carbureter. - Google Patents

Description

R. SYMMONUS, JB.

GARBURETER.

APPLIOATIONJILED we. 2, 1906.

1,013,082, Patented Dec. 26, 1911.

2 SHEETSSHEET 1.

11. SYMMONDS, J11.

GARBUBETER.

APIPLIOATION FILED AUG. 2, 1906.

Patented Dec.26,1911.

2 BHEBTS-SHEET 2.

l'okzi/y mmim Jr 1 fawn/Z277 v coLUIAIIA PLANOGIAPII 30., WASHINGTON, n. c.

UNITED STATES PATENT orrion.

ROBERT SYMMONDS, J R., OF KENOSI-IA, WISCONSIN, A SSIGNOZR. T O THOMAS B. JEFFERY,

OF KENOSHA, WISCONSIN.

CARBURETER.

Specification of Letters Patent.

Patented Dec. 26, 1911.

Application filed August 2; 1906. Serial No. 328,871.

at Kenosha, county of Kenosha, State of Wisconsin, have invented a certain new and useful Improvements 1n Garbureters, and declare the followlng to be a full, clear, and

, exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates in general to carbureters and more particularly to a carbureter especially adapted for supplying a combustible mixture to an explosive engine on an automobile.

The volume of mixed air and hydro-carbon vapor delivered to an engine must, of course, increase as the speed of the engine increases, and in order that the volume of air supplied to the mixture may increase it is desirable that the ports or passages through which the air is supplied to be mixed with the vaporized hydro-carbon should be automatically increased in ca pacity as the speed of the .engine increases. Carbureters as heretofore constructed have comprised a primary mixing chamber in which air is mixed with the vaporized hydro-carbon, and a supplemental mixing chamber where the mixture formed in the primary chamber is supplied with additional air. In order to obtain the best results and reduce to a minimum the consumption of the hydro-carbon, it is desirable that the air supplied to the auxiliary mixing chamber should be automatically increased in volume as the speed of the engine increases.

The primary object of my invention isto provide a carbureter in which the volume of air supplied to the combustible mixture will be automatically and definitely increased in volume according to the increased" speed of the engine.

A further object of my invention is to provide a carburetor which may be con structed of light, thin metal, and which will be inexpensive in manufacture and eflicient.

in operation. y a

The embodiment of my invention herein disclosed may be generally-described as comprising a primary mixingchamber in which air is mixed with vaporized hydro-carbon, a secondary mixing chamber to which the mix- 7 ture passes from the primary chamber and to which additional air is supplied, and means for automatically varying the volume of air supplied to the secondary mixing chamber as the speed of the engine varies.

My invention will be more fully described hereinafter with reference to the accompanying drawings in which the same is illustrated as embodied in a convenient and practical form, and in which Figure 1 is a vertical sectional view on line 1-1 Fig. 3; Fig. 2 a vertical sectional view on line 2-2 Fig. 3; Fig. 3 a horizontal sectional view on line 33 Fig. 1; Fig. 4 a horizontal sectional view on line 4.4 Fig. 1; and Fig; 5 a view similar to Fig. 3 showing on a smaller scale a modification.

Similar reference characters are used to designate similar parts in the several figures of the drawings.

Reference character A indicates a casing which may conveniently be pressed from sheet metal.

B designates a cover for the casing A which may conveniently be formed integrally with the conduit 6 leading to the en-.

1 gine. The cover B may also be conveniently formed of pressed sheet metal and is provided with a screw-thread around its lower end engaging a screwthread Within the upper end of the casing A. l

C designates a tube extending upwardly supplied. The tube C may be conveniently retained within the casing A by a flange a on the lower wall of the casing closely surrounding the tube.

D designates a plate located Within the casing A at the upper end of the tube C. The plate Dis provided with a circular flange cl extending within and secured to the upper end of the tube C. A circular flange 03 projects upwardly around the outer edge of the plate D and closely engages the inner surface of the casing A.

E designates a partition, the periphery of which is secured between the upper edge of the flange d and the lower edge of the cover B ofthe casing. The partition E is providedwith a plurality of openings there through controlled by valves. For convenience three openings are shown'which are opened or closed by the valves E, E and E Each of the valves is provided with a flange adapted to overlie the surface within the casing A through which air is of the partition around the opening controlled thereby, and is also provided with a central opening around which project circular flanges forming guides through which 5 extends. a rod F. TherodFis provided with a screw-threaded portion extending through an interiorly screw-threaded collar f secured within the cover B. The end of the rod F outside of the cover B is preferably milled to facilitate its rotation. Surrounding the rod F immediately below the collar f is'a washer f intermediate of which and the valve is a spring, the tension of which retains the valve seated to close the corresponding opening through the partition E. 6, 6 and e designate the springs for seating the respective valves E, E and E These springs may be, as indicated in the drawings, of graduated size or they may be of the same size and of different tension by reason of diflerent adjustments of the several rods F H designates a needle valve extending within, and in screw-threaded engagement with a sleeve Gr depending from, and formed integrally with a short tube Gr communicating through the tube C with the interior of the casing A. The tube G may be conveniently supported at one end by a reduced portion thereon extending within an opening in the tube C while a supporting pin 9 is provided for supporting the opposite side of the sleeve G, such pin engaging at one end a socket in the sleeve and extending at its other end through an opening in the tube C. H designates a nozzle surrounding the needle valve and supported at its lower end within the upper end of the sleeve Gr. An opening it is provided in the upper end of the nozzle H, which is controlled by the tapered end it of the needle-valve. Surrounding the upper end of the nozzle is a tube H constituting the primary mixing chamber which may be conveniently supported within a circular flange 6 formed on the partition E.

K indicates an annular float within the chamber A and surrounding the inlet tube G. L indicates a lever pivoted upon a rod Z and bifurcated to surround the tube C and underlie the float K at diametrically opposite points. The opposite end Z of the lever L is also bifurcated and underlies a weight m fixed upon the gravity needle valve M which controls the supply of gasolene, or other hydro-carbon to the interior of the casing A. The needle valve M is located within a casing N the lower end of which is provided with a passage 01. con trolled by the needle valve W. The lower end of the casing N is adapted to communicate with a conduit leading from a supply of gasolene. The portion m of the needle valve above the weight on thereon extends 6 loosely through an opening in a nut N closing the upper end of the valve casing N. The valve casing N may be secured to the exterior of the casing A in any suitable manner, as for instance by means of a reduced portion a thereon extending within an opening in the wall of the casing A. Brackets n may also be provided on the valve casing N to engage the outer surfaces of the casing A to prevent the movement of the valve casing relatively thereto.

0 indicates a throttle valve located in the tube 7) which leads to the engine. This throttle valve may conveniently be of the butter-fly type and is rigidly secured to a rod P extending through, and rotat-ably supported by the tube 6.

0 designates a clamp screw for locking the valve to the rod P while p designates an arm fixed to the rod P for oscillating the latter, and thereby opening and closing the throttle valve.

The operation of my improved carbureter is as follows: Gasolene or other hydro-carbon is supplied through the port n in the valve casing N to the float chamber formed by the portion of the casing A below the plate D and surrounding the tube C. WVhen the predetermined amount of the fluid has accumulated in the float chamber the float K rises thereby permitting the weight of the needle valve to force the same against its seat and discontinue the further flow of fluid to the float chamber. When the fluid in the float chamber falls below the predetermined level the flow descends and through engagement with the bifurcated ends of the lever=L oscillates the same about its fulcrum thereby lifting the needle-valve M away from its seat and permitting the fluid to be again supplied to the float chamber. The action of the engine with which the carbureter communicates through the tube 7), creates a suction which draws the gasolene through the nozzle H past the point it of the needle valve. The suction of the engine also draws air through the tube C and upwardly around the nozzle H sothat an explosive mixture of air and combustible fluid is formed in the tube H which constitutes a primary mixing chamber. 1-15 \Vhen the speed of the engine increases the suction is such that one of the valves on I the partition E is un-seated against the tension of its closing spring thereby admitting air into the auxiliary mixing chamber formed by the space between the partition E and top of the cover B where it is com bined with the mixture flowing thereto from the primary mixing chamber H When the speed of the enginestill further increases a second valve on the partition E is un-seated thereby permitting an additional volume of air to pass to the auxiliary mixing chamber.

A still higherspeed of the engine unseats the third valve and permits a still greater quantity of air to pass to the auxiliary mixing chamber. The needle valve H is first adjusted so that the proper amount of the 'gine has been attained.

combustible fluid will pass through the nozzle H to the primary mixing chamber. The several valves on the partition E are then separately adjusted so that the first will open when the engine has attained such a speed that an additional volume of air should be added to the mixture. The other valves are then adjusted so that they will successively open thereby increasing the volume of air supplied to the combustible mixture as the speed of the engine increases. The valves on the partition E may be made to successively open by adjusting the rods F thereby varying the tensions of the springs which hold the valve seated. The valves are thereby made to successively open the suction above the same is increased by the increased speed of the engine. If desired the valves may be held to their seats by different pressures by making the springs different sizes as shown in the drawings. The valves on the partition E may also be made to successively open by varying their size as shown in Fig. 5 in which the largest valve E will open first, and as the speed of the engine increases the next largest valve E while the smallest valve E will only open when the maximum speed of the enlVhen the valves are of different sizes it is not necessary to adjust the tensions of the springs which seat the valves.

From the foregoing description it will be observed that I have invented an improved carburetor in which the volume of air supplied to the combustible mixture will be definitely and automatically increased as the speed of the engine increases, thereby securing the most advantageous result with a minimum consumption of the gasolene or ,otherhydro-carbon.

Having now fully describedmy invention, what I claim as new and desire to secure by Letters Patent is:

1. In a carbureter for explosive engines, the combination with a primary mixing chamber having an inlet port for a combustible fluid and an outlet port for a combustible mixture, of means for supplying air to said mixing chamber, an auxiliary mixing chamber with which the primary mixing chamber communicates, a plurality of valves controlling air ports leading to said auxiliary mixing chamber, and springs of different tensions for retaining said valves seated, whereby said valves will successively open as the speed of the engine increases.

2. Ina carbureter for explosive engines, the combination with a primary mixing chamber having an inlet port for a combustible fluid and an outlet port for a combustible mixture, of means for supplying air to said mixing chamber, an auxiliary mixing chamber with which the primary mixing chamber communicates, a plurality of valves controlling air ports leading to said auxiliary mixing chamber, springs for normally seating said valves, and means for adjusting the tensions of said springs whereby they will successively open the speed of the engine increases.

3. In a carbureter, the combination with a casing, an air supply tube extending concentrically within said casing, a plate supported at the upper end of said tube and forming the top of a combustible fluid chamber, a partition supported within said casing above said plate,.a tube extending through and depending from said partition, a nozzle communicating with said fluidsupply chamber and extending within said .last mentioned tube, a plurality of valves controlling air-supply ports in said partition. and means for controlling the snaressive opening of said valves as the speed of the engine increases.

4. In a carbureter, the combination with a casing containing a float chamber to which a combustible fluid is supplied, a float in said chamber for controlling the supply of fluid thereto, a nozzle communieating with said chamber, an air inlet tube surrounding said nozzle and extending Within said casing, a partition within said casing, a tube depending from said partition and surrounding said nozzle, a plurality of valves controlling ports through said partition, and means for permitting said valves to open successively as the speed of the engine increases.

5. In a carbureter, the combination, with a supply reservoir and a discharge nozzle leading therefrom, of a main air supply conduit within which the nozzle is mounted, and a supplemental air conduit, said supplemental air conduit being provided with a pair of inlets, a pair of independent valves one for each of said inlets, and independent means for yieldingly holding said valves in normal position at difierent tensions. j

6. .In a carbureter, the combination, with a supply reservoir and a discharge nozzle into the main conduit beyond the fuel noz zle, said supplemental air conduit being provided with a pair of inlets, a pair of independent valves one for each of said inlets, and independent adjustable means for yieldingly holding said valves in normal position at different tensions.

In testimony whereof, I sign this specifi cation in the presence of two witnesses.

ROBERT SYLlMONDS, JR. Witnesses:

J. W. DE CoU,

CHARLES T. ABBOTT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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