US1576296A - Carburetor - Google Patents

Description

March 9 1926. F. H. BALL CARBURETOR Filed Jan. 13, 1919 2 Sheets-Sheet 1 5441mm b0:

WOW $2 113 March 9 1926. 1,576,296 I F. H. BALL GARBURETOR Filed Jan.. 13 1919 2 Sheets-Sheet 2 mechanism.

e 'earn FRANK H. BALL, OF DETRO IT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, T0

BALL & BALL CARBURETOR COMPANY, OF DETROIT, MICHIGAN, A PARTNERSHIP COMPOSED OF FREDERICK 0 BALL ANDCORNELIA M. BALL.

To all whom it may concern Be it l nown that I, FRANK citizen of the United States, residing at Detroit, in the county of lVayne and State of Michigan, v have invented new and useful Improvements in Carburetors, following is a specification.

This invention relates to carburetors and consists in certain improvements in theconstruction thereof as will be hereinafter fully described and pointed out in the claims.

The carburetor forming the subject mat-.

ter of the invention is particularly designed to permit the carburetor to be tilted or in- .clined. The invention is illustrated in the accompanying drawings as follows Fig. 1 showsa plan view of the carburetor.

Fig: -2 a section on the line 22 in Fig. Fig. 3 a section on the line 3-3 in Fig. 1 marks the bodyof the carburetor. This is provided with two suction passages 2 lead i1ig "froni'a co1n1noh intake v2*. Each passage is provided with a throttle valve 3 which is provided with the usual operating Each suction passage is pro- I vided with a Venturi tube 4: into which the spray nozzles 5 project. The spray nozzles extend from an annular manifold 6, arranged around the Venturi tube and the manifold'form's a part of the spray passage 7 leading to a spray well 8. A fuel conduit discharges to the well 8 through radial openings 9 leading from a hollow plug 10, the hollow plug 10 being closed at its top. r -mete-red opening 11 extends throughthe bottom of the plug 10 and leads from a passage 12, the passage 12 being connected with a float chamber 13. An air passage 1 1 opens into the intake 2 and a metered opening 15 leads from the passage 14 to a passage'16, the passage 16 entering the well 8 in position to spray the fuel delivered from the discharge openings '9 at a point adjacent to said discharge openings.

A bypass 17 leads from the spray passage 7 to an idling nozzle 18 arranged above the throttle 3.

It will be understood that each suction passage is provided with the fuel and spray delivering devices above described, one well being arranged at each side of the float chamber. a

' 'Application, filed January 13,

n. BALL,

of which the CARBUBETOR.

1919. Serial No. 270,804.

The discharge ends of. the fuel nozzles 5 are above the fuel level A. The passage 7 is below the fuel level and the discharge openings 9 are approximately at the fuel level, preferably very slightly below so as to assure a delivery of fuel for idling.

Inthe operation of the carburetor when a reduction of pressure occurs in the Venturi tube at the ends of the nozzles this reduction of pressure is communicated to the spray passage so that the spray passage is brought to a subatmospheric condition. This induces a flow of air through the opening 15 which picks up the fuel in the passage 7 and sprays it through the nozzles to the suction passage. The reduction of pressure in the well induces a flow of fuel through the meteredopening 11 and out through the radial openings 9 corresponding to the variations brought about in the spray passage by variations in pressure in the Venturi tube. The amount of fuel thus varies as the amount of air delivered through the Vnturi tube varies and the fuel. is delivered in the form of a very rich mixture, or emulsion, from the spray nozzles.

In a general way this manner of delivering fuel to the suction passage has been heretofore accomplished. This method of delivering fuel is of peculiar advantage where the fuel discharge 9 is remote from the suction passage. -VVith carburetors delivering fuel direct to the suction passage any gravity li ad of the fuel relatively to the point of discharge of the fuel. Some attempts have been made to correct this by placing the discharge nozzle approximately tiltin of the carburetor changes the r at the tilting center. of the fuel surface in the float chamber but this leads to a strucdischarge may be avoided and at the same;

time have the suction passage remote from j U the center of the float chamber because when the fuel is converted into spray level is unimportant and does not disturb the gravity head at the point of discharge of the fuel at the radial openings 9. As ordinarily used the suction passage and float the level of the discharge nozzles relatively to the fuel chamber are arranged one forward of the other and the discharge passage 9 for con:

venience is arranged at the side of the float" chamber, the tilting of the carburetor side- Wise being ordinarily so slight as to be of. little importance. Where the double carburetor having two suction passages isused this is of special convenience because itpermits of placingone of the fuel wells at each seated by a spring 30, the tension of which is such asto permit the opening of the valve only at' the higher speeds. This will introduce air so as to change the mixture only at the higher speeds. Y v

In aeroplane practice also it is desirable to have .the opening balancing the pressure on the float chamber lead to the intake 2 so that the whole may be'led to a point of safety so far as fireis concerned. This is accomplished in the present structure bv means of the passage 31 leading fromthe air passage 14.

- What is claimed as new is 1. In a carburetor, the combination of a suction passage; a float chamber, said passage and float chamber being arranged one forward of the other; a spray passage below the level of the fuel in the float chamber leading to the suction passage; a fuel conduit leading from the float chamber and discharging to the spray passage at the side-of the float chamber away from a front and v rear line through the chamber; and an air passage leadlng to the spray passage. 2. In a carburetor, the combinationof a suction passage; a float chamber off-set from the suction passage; a float in the chamber;

a swin ing arm on which the float is mounte an inlet valve controlledby the swinging arm a spray passage below the level of the fuel in the float chamber leading to the suctionpassage; a fuel conduit leading from the float chamber to the spray passage and discharging into the spray passage adjacent to the tllting center of the fuel surface in the float chamber. as controlled by the float; and an .air passage leading into the spray passage.

3. Ina carburetor, the combination of a, float chamber; -two suct1on passages, one

each side of a plane through the axis of the float chamber; a spray passage leading to each suction passage, one spray passage from each side of the float chamber opposite said plane; a fuel conduit leading from'the float chamber to each spray passage and discharging at a point ad acent to the side of,

the chamber and adjacent to the tilting center of the fuel surface in the float-chamber; and an air passage leading to each spray passage.

In testimony whereof I have hereunto set my a ' FRANK H. BALL.

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