US1613257A - Carbureting device - Google Patents

Description

Ja'n. 4,1927. f 1,613,257

L. M. WQOLSON CARBURETING DEVICE iled Oct. 18, 1919 Patented Jan. 4, 1927.

UNITED STATES PATENT OFFICE.

LIONEL M. WOOLSODL OE' DETROIT, MICHIGAN, ASSIGNOR TO PACKARD MOTOR CAR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

,oamnanr ne DEVICE.

. Application filed October 18,1919. seriaimaarsm- This invention relates to hydrocarbon motors and particularly to carbureting means therefor. 1

In hydrocarbon motors, it is desirable that heat shall be applied to the incoming mixture for the purpose of making it more easily vaporized and preventing it from condensin on the walls of the intake conduit. One ot the methods for so heating the mixture is toconnect the motor intake pipe with a combustion chamber having an igniter and fed with a combustible mixture by an auxiliary carburetor. 1n multi-cylinder motors, particularly of the V-type, it is sometimes desirable to have a plurality of such combustion chambers,,one.for each of the separate intake conduits of the motor, and in that event two auxiliary carburetors may be employed for supplying those combustion chambers.

One of the objects of the present invention is to provide a plurality of auxiliary carburetors in connection with a single float chamber, for the purpose of supplying a combustible mixture to combustion heater chambers or similar devices;

'Wlien motors' such as described above are used in airplanes, it is desirable that fire hazards from the motor shall be eliminated or minimized as far as possible. One of the objects of the present invention is to provide air intake conduits for the carburetors above referred to so that all air for the carburetors and the float chamber may be drawn from outside of the body of the airplane or outside ofthe enclosing casing of the motor, as the case may be. Other objects and advantages of the 1nvention will appear from the following description taken in connection with the drawings which form a part of this specification and in which v Figure 1 is an elevation and part sectional view of a carbureting means embodying my invention; and

Figure 2 is a plan view, partly in section, on the-line 2-2 of Figure l.

Referring to'the drawings, represents the float chamber ofth'e carburetor 11 of a hydrocarbon motor, parts of which carburetor are broken away in Fig. 2 as being unnecessary to the disclosure of the invention. The float chamber is fed from any suitable source of supply by a pipe 12, and a float 13 in the chamber operates in the usual way through small weighted levers 14 and a valve 15, the'upper end only of which is shown in the drawings, to control the level of gasoline or'other fuel in the chamber 10. A cover 16 is removably secured over the top of the float chamber and supports the levers 14, and a cap 17 is threaded onto the cover to enclose the upper projecting end of the valve 15. v

Lateral extensions onopposite sides of the float chamber 10 are shown at 18 and on top of these extensions or parts of the float chamber arecarburetors 19. These carburetors are exactly alike and in Figure 1 one of them is shown in elevation and the other in section. One only will be described and it will be understood that the description refers equally well to the other carburetor.

These carburetors 19 are of the compensating'type their specific construction forming no part of the present invention. Each of them comprises a piece 20 which is secured to the top of the float chamber and into which a piece 21 is threaded. The piece 21 extends downwardly into the floatchamber and a tube 22 is telescoped over the extended end and forms a chamber 23 between these parts. This chamber has air ports 24. at its upper end receiving air from the air space in the upper part ofthe float chamber and a series of ports 25 are formed near the lower end of the piece 21. This piece 21 is provided with a central conduit 26 which is supplied by a restricted port 27 in the lower end of the tube 22 so that gasoline from the float chamber is fed into the piece 21 and through the ports 25 into the lower part of the cham-- ber 23. '1 i A sleeve 28 surrounds the middle part of the piece 21 between a flange 29 'thereon and the piece 20, and an air passage 30 is thus formed in communication with a series of air passages 31 formed in the piece 21, these latter air passages communicating with an air chamber 32 and an outlet 33 above the chamber 32. The chamber 32 and outlet 33 areformed in a piece 34 threaded onto the piece 21 and surrounding its upper end. Said upper end of the piece 21 is tapered as at 35 and lateral out-let ports 36 form a communication between the upper end of the conduit 26 and the outlet 33 of the car-.

buretor. V

From this description it will be observed that in the operation of the motor suction in the outlet 33 will draw air through the pas-- sages 30, 31 and 32 and gasoline through the ports 27 and 25, conduit 26 and ports 36. This will cause a mixture of gasoline and air in the outlet 33, which mixture will he carried to the combustion chamber of the heater in the chamber 23 drops below the. ports-25 air will then be drawn through the ports 24 into the chamber 23 and through the ports 25,

to .thereb mix with the gasoline passing upwardly t irough the conduit 26, This emulsion of gasoline and air will be diluted by the air from the chamber 32 and a less rich mixture will then pass to the outlet 33. Thus a rich mixturewill be supplied to the heater chamber for starting the motor and a less rich mixture wil lbe supplied for steady running conditions' For supplying air to'the carburetors '19, both at their air chambers and at their ports 24, a common air pipe 37 is provided, which air pipe, if the motor is encased as When used in'an airplane, has its inlet end arranged outside of, the casing or body. This air pipe, which is common to the said carburetors, is shown as provided with three branches38, 39 and 40, the branch 38 leading to the air' passage 30 of the leftrhand carburetor 19, the pipe 39 leading to the air passage 30 of the right-hand carburetor 19, and the branch 40 leading to the upper part of the float chamber 10 of the carburetor 11, said latter branch thus supplying air to the float' chamber and therefore: to the ports 24 of both carburetors 19. Should there be any condensation of gasoline in any of the con nections between the carburetors 19 and their respective combustion chambers, as when the motor isstopped, such gasoline would not leak out around the motor but would be pipes and branches, and particularly the' branch 40; would carry such gasoline to the outside of the airplane body or motor casing. Other advantages and uses may be found,

and other forms may 'bemade or devised within the terms of the claims, without departing from the spirit or scope of this invention.

Having thus described my invention, what I claim and desire to secure by Letters Patcut is:

1. A carbureting device comprising a float chamber and a compensating carburetor extending into the float chamber and adapted to rece ve some of its air from the air coinpartment in the upper part of said float chamber, and an air conduit connected both to said float chamber 'and to said carburetor. 2. In a carbureting device, the combination with a float chamber adapted to supply liquid fuel at a predetermined level, of tWO carburetors on opposite sides of said float chamber and each having a part extending into said chamber, and an air supply pipe having branches leading to said float chamher and; to said carburetors. v

3. In'a carbureting device, the combinat on with a float chamber adapted to supply liquid fuel at apredetermined level, of a pair of carburetors'connected, to said float chamber and adapted to supply mixture, and an air pipe connected tosaid float chamber and said carburetors.

In testimony whereof I afiix my signature.

LIONEL M. 'WOOLSON.

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