US1679456A - Carburetor - Google Patents

Description

Aug. 7, 1928.

A. WAG N E R cAnBURfi'roR Filed Aug. 30, 1922 2 Sheets-Sheet l A. WAGNER Aug. 1, 192a OARBURETOR 2 Shins-Sheet 2 Filed Aug. 30. 1922 f'cu enfir: QZZeri Wayne 5 02 way Patented Aug. 7, 1928.

V UNITED STATES PATENT OFF I C E a ALBERT WAGNER, OF CINCINNATI, OHIO, ASSIGN OR TO WAGNER RESEARCH SOCJIETY. CINCINNATI, OHIO, A COPARTTIERSHIP COMPRISING ALBERT WAGNER, HENRY A. MEYER, FELIX ELSBACH, AND JACOB BLOCK.

CARBURETOR.

Application filed August 30, 1922.

The object of this invention. is to provide simple, inexpensive and efficient means whereby the quality of the mixture fed to an internal combustion engine may be-accurately regulated according to the weather and other conditions affecting the operation of the engine.

A further object of the invention is to provide a device for the stated purpose which may be manipulated at a point convenient to the operator, and another object is to provide means whereby the flow of air may be entirely cut-off while starting the engine. Other objects will appear incidently in the course of the following description and the invention resides in certain novel features which will be particularly pointed out in the claims following the detailed description.

The invention is illustrated in the accompanying drawings, in which,

Figure l is a side elevation, with parts broken away and parts in section, of a can buretor having my improvements applied thereto,

Figure 2 is a view partly in end elevation and partly in section on the line 2 L of Figure 1,

Figure 3 is a view partly in plan and partly in horizontal section.

Figure 4 is a plan view of the indicator plate.

The carburetor may be of any preferred form including a float chamber 1 connected with a source of fuel supply, an air inlet 2 containing a butterfly choke valve 3, and a needle valve 4 controlling the flow of fuel from the float chamber to the mixing chamber. The needle valve 4 is mounted in a valve chamber 5 arranged between the float chamber and the main body 6 of the carburetor, and preferably cast therewith. The valve 4 seats in the upper end of a passage 7 which establishes communication between the outlet port 8 of the float chamber and the port 9 leading into the collecting chamber 10 at the bottom of the carburetor, a passage 11 through a plug 12 permitting the fuel to rise into the mixing chamber from the collecting chamber, all of which will be readily understood upon reference to Figure 1. The air inlet 2 leads directly into the mixing chamber.

The butterfly choke valve 3 is carried by sleeve 22 in which .cam 24 in engagement with Serial No. 585,161.

a shaft 13 which is the sides of the secured thereof. An angle lever 16 mounted on the end of the shaft 13 alongside the crank and has one arm 17 turned laterally to constitute a tappet adapted to impinge against the crank 15 while the other arm terminates in an eye'18 for the attachment of an operating member 19. The angle lever is retained upon the rock shaftby any convenient means, such as the washer 20 and screw 21.

Formed on or secured upon the side of the carburetor body 6 is an inclined bearing is journaled a rock shaft 23 having a cam or eccentric 24 on its lower end. A- bracket 25 is provided on the upper side of the sleeve 22 and an angle lever 26 is fulcrumed upon said bracket, onearm 27 of said lever depending into the path of the cam 24 and held thereagainst by gravity, and the other arm 28 extending laterally into engagement with a recess 29 in the side of the needle valve 4. Above the sleeve 22, a spring 30 is coiled around the rock shaft 23 between the end of the sleeve and an abutment 31 on the shaft so that the shaft will be maintained in proper position to hold the the angle lever 26, a spring 32, within the valve chamber 5, tending to hold the valve seated with the upper end of the recess 29 bearing down upon the arm 28 of the angle lever. A flexible shaft 33 has its lower end fitted telescopically to the rock shaft 23 with slots or notches 34 in the former 35 on the latter whereby'theeflexible shaft may be shifted longitudinally upon the rock shaft, but rotation of theflexible shaftwill be transmitted to the rock shaft. The flexible shaft extends to and through a relatively fixed support, such as the instrument board 36 of an automobile, and is slidably and rotatably mounted in a bearing 37 therein. A spring 38 is coiled around the shaft between an abutment 39 thereon and the end of the sleeve so that normally the handle 40 on the end of the shaft will be held against the indicator plate 41 which is secured upon air inlet and a crank 15 is is loosely the instrument board concentric with the.

sleeve. A semi-circular series of index numerals 42 is displayed upon the indicator plate at the margin thereof and a pointer journaled' in bosses 14 on upon said shaft adjacent one end 43 extends radially from the hub of the handle 10 to cooperate with said numerals. The actuating member 19 which operates the valve 3 may be a light stout wire and is socured to the flexible shaft below the abutment 39 thereon, as shown.

Upon reference to Figure 4, it will be noted that the numerals 42 run in sequence from left to right and that at the left hand end of the scale appears the word Off, while at the right hand end thereof appears the word Rich. \Vhen an engine is cold, a very rich mixture must be used in starting, and a mixture richer than a good running mixture must be used until the engine warms up. Those are easily met in a motor equipped with my present invention. To start the motor, the operator turns the handle until the pointer 43 is at the rich side of the dial. The rotation of the handle is, of course. transn'iitted to the cam 24 which is turned so that the angle lever 26 is rocked and the valve 4 is raised to permit a full flow of fuel. The flexible shaft is then pulled and this action will draw upon the member 19, without disturbing the position of the cam 24:, to swing the tappet arm 17 against the crank 15 and rock the shaft 13 so that the valve 3 will be closed and the inflow of air through the main air supply 2 cut off. very rich fuel will, therefore, pass to the en gine which is started in the usual manner. After the engine starts, the handle -10 is released and the valve 3 will automatically open. As the temperature of the engine rises the handle 10 may be rocked so as to move the pointer 43 toward the Off side of the dial, thereby permitting the needle valve to move toward its seat and reducing the flow of fuel. This regulation of the fuel may be accomplished easily without stopping the automobile, and a short experience will demonstrate the most effective positions of the pointer for the particular engine to which the invention is applied. For instance, if after a few trials the operator notes that the engine starts quickly and easily with the pointer on T and that the most efiicient mixture for normal running is obtained with the pointer on 3, he will thereafter move the pointer at once to 7 for starting and move it back to 3 for running. After the engine is running normally, the flow through the carburetor is controlled by the usual throttle which is preferably connected with the air-choke valve by devices which serve to maintain a constant ratio between the valves, but I have not illustrated these devices in the accompanying drawings in order to avoid confusion. 1t will be noted that the tappet 17 is normally away from the crank 15 so that it will not interfere with the throttle operation of the choke-valve.

My apparatus is very simple and efficient, and responds instantly to the manipulation of the handle and the setting shaft. By its use a very sensitive regulation of the fuel flow may be effected.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent of the United titates is 1. in a carburetor, the combination of a fuel-controlling needle valve having a recess in its side, a rock shaft arranged exteriorly to said valve, a cam on said shaft, and an angle lever mounted above the cam and between the same and the valve, one arm of the angle lever engaging the cam and the other arm thereof engaging the recess in the side of the valve.

In a carburetor, the combination of a reeiproeatory fuel-controlling needle valve, a butterfly air-choke valve, an operating shaft comprising a member mounted for rec-king movement, and a member telescopically litted thereto whereby it may have independent relative sliding movement, a tappet having a lost-motion operative connection with the air-choke valve, a link con nection between said tappet and the slidable member of the operating shaft, a cam on the first-mentioned member of the operating shaft, and an angle lever mounted between said cam and the fuel-controlling valve with one arm in engagement with the cam and the other arm in engagement with the said valve.

In testimony whereof I hereunto atiix my signature.

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