US1224088A - Carbureter. - Google Patents

Description

Patented; Apr. 24, 1917.

2 SHEETS-SHEET l.

J. S. GOLDBERG.

CARBIJRETER.

APPLICATION FILED MAY 27. I9I2.

Patented Apr. 24, 1917.

2- SHEETS-SHEET 2.

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JOHN S. GOLDBERG, OF CHICAGO, ILLINOIS, ASSIG-NOR'TO STROMBERG MOTOR DEVICES COMPANY, OF CHICAGO, ILLINOIS. A CORPORATION OF ILLINOIS.

CARBURETER.

Specification of Letters Patent.

Patented Apr. 2a, 1911"?.

Application led Hay 27, 1912. Serial No. 699,838.

To all whom t may concern.'

Be it known that I, JOHN S. GoLDnno, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Carbureters, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a. part of this specification.

My invention relates to carbureters for use in association with internal combustion engines and is' concerned with improved operating means for an auxiliary air and fuel supply in addition to the primary air and fuel supply. My invention is concerned with the form of the secondary air valve and the manner in which the suction of the engine with which the carbureter is associated is effective in securing its operation. In accordance with my invention I provide a piston chamber and a piston which has its surface exposed to the pressure in thecarbureting chamber, and this piston carries a valve which controls an inlet from the atmosphere. The movement of the piston corresponds to the amount of suction created by the engine and the movement of the valve graduates the effective size of this auxiliary air inlet. It will be seen that this operation is auto matic. In addition to this automatic valve I associate with it a manually operated valve which may be moved to change the sizev of the effective auxiliary air inlet and between the automatic valve and this manual valve the proper amount of air, relative to the amount of fuel, is admitted so that the most advantageous proportions may be had at all speeds of the engine. The axis of the moving parts in my carbureter is vertical and it will be seen that these parts are hung, rather than mounted in bearing lits, and friction is thereby greatly reduced. There is no tendency for the valve to stick and the piston is therefore accurately responsive to the changes in the engine suction. rIhe arrangement which I provide is furthermore eective in that, although its operation is easy, it is too ponderous to respond to minute and sudden changes in the engine suction, but is more properly responsive to the average effect which, of course, is the most desirable arrangement.

My invention is illustrated in the accompanying drawings, in which* Figure 1 is a View partly in elevation and partly in longitudinal axial section;

Fig. 2 is a sectional view taken on the plane of the line 2-2 Iof Fig. 1 and looking in the direction indicated by the arrows;

Fig. 3 is ay fragmental elevational view taken in the direction of the arrow 3 of Fig. 2; and

Fig. 4.- is a view similar to part of Fig. 1 but showing the piston and valve in another position.

T he casing is illustrated at 5 and it will be seen that it provides the carbureting chamber 6 to which the primary air passage in the form of a Venturi tube 7 leads. The outlet for the carbureting chamber 6 is controlled by a throttle valve 8 and is surround ed by a flange 9 by means of which the device may be secured to themanifold of the engine. The primary air inlet passageway' 8 connects with the lower end of the Venturi tube and this air inlet is supplemented by an air horn 9 which is secured in place by means of a nut 10 screwing into a stud 11 extending downwardly from a bridge 12 spanningthe air inlet passageway 8. This air horn is provided with a valve 13 mounted upon a shaft 14 extending outside the horn and provided there with an operating lever 15. A spring pressed plunger 16. which is adapted to rest in grooves in the periphery of the hub of the operating lever holds the valve 13 in either its open or closed position. rIhe air horn 9 may be connected with a warm air inlet and the warm air going in in this way may be diluted by cold air entering through the side passages 17 which are controlled by an annular valve 1S.

The bridge 12 is in the form of a tube and forms a fuel passageway. 'Ihe fuel used is in liquid form, such as gasolene, and it is introduced into the carbureter through a float chamber 19, the details of which I am not concerned with in the present case. The float chamber is provided with an entry cou pling 20 which is connected with the source of fuel supply.

A fuel emitting nozzle 21 is supported on top of the bridge 12 and is located axially in the Venturi tube, ending in substantially the most contracted portion thereof. The

Venturi tube may be surrounded by a water jacket 22.

At one side of the carbureting chamber 6 there is provided the auxiliary supply chamber 23 into which an auxiliary fuel nozzle 24, connected with a passageway 25, extends. The passageway 25 is connected with a passageway in the bridge 12 and is thus supplied with fuel. Below the auxiliary supply chamber 23, there is a valve chamber 26 and belowth'e valve chamber there isa piston chamber 27. A piston 28 is mounted to reciprocate vertically in the chamber 27 and it carries a tubular shaft 29 which extends upwardly and which is provided with a reduced portion 30 mounted to reciprocate in a boss 31 in the upper wall of the'cham.- ber 23. A4 spring 32 is disposed inside the tubular shaft 29 and between va shoulder 33 therein and the base of the piston chamber 27. The bore of the shaft 29 is exposed to the auxiliary supply chamber 23 and thus to the carbureting chamber -6 through the side opening 34, and it will be seen that the pressure is accessible tothe underside of the piston 28 in this way.

An annular valve 35 is disposed in the valve chamber 26 and is held in place so that it may be given angular movement by means ofy the plate 36. This valve has a central opening for the passage of the shaft 29 and is in the form of a ring in which the automatic valve 37, secured to the shaft 29, may operate. This arrangement is well illustrated in Fig. 2, where it will beseen that the valve casing 26 is provided with the side ports 38, 38 and that the valve itself is provided with openings 39, 39. It will be seen that the openings 39, 39 in the valve are diametrically opposite as are also the openings 38, 38 in the valvel casing, and it will also be seen that the valve may close the openings 38, 38 either entirely or to any desired extent. When the valve is in the position shown in Fig. 2, the openings 38, 38 are closed. The valve casing is provided with a slot 40 through which a stud 41,' carried by the valve 35, may pass. This stud is connected by means of 'an operating lwire 42 with an-operating part within easy reach of the operator, for instance, the driving seat of an automobile, and it will'be seen that he may move the wire to give the openings 38, 38 any desired horizontal dimension.

The normal position of the valve 37 is its uppermost position, as shown in Fig. 1, and in this position it cuts olf the auxiliary supply chamber 23 from both the atmosphere openings 38, 38. When the suction created in the carbureting chamber has reached a predetermined point, however, it overcomes the tension of the spring 32 and, playing on the under surface of the piston 28, ydraws the piston down and with it the valve 37 so that more or lless of the openings 38, 38 may be brought into operative connection with the auxiliary supply chamber. This operation is illustrated in Fig. 4.

Mounted in an opening in the top of the auxiliary supply chamber 23 is a bushing 43 and a lever 44 is mounted. upon a pivot 45 carried by this bushing. The end of this lever is bifurcated at 46 and the valve rod 30 passes between the tangs. The end of the valve rod 30 is screw-threaded for the reception of a nut 47 and it will appear that after the rod 30 hasbeen lowered sulciently the nut 47 will engage the lever 44 and will carry it down. The tail-48 of the lever engages with the valve carrier 49 which extends into the chamber 23 and is there provided with a flange 50 between which and the bushing 43 a spring 51 is disposed. This spring tends to move the valve carrier 49 downwardly'. A needle valve 52 is carried by the part 49 and is disposed in axial alinement with the nozzle 24 so that it may enter the nozzle and so that its vertical movement will determine the effective area of the nozzle.- The upper end of the needle 52 is provided with a head 53 between which and the flange piece 50 a spring 54 is disposed. Thus the needle valve, which passes through a somewhat enlarged opening in the valve piece 50, is mounted with a certain amount of freeness so that it may properly seat itself in the nozzle. It will be seen that when the auxiliary air valve is drawn down to admit more air, in response to the increased demand of the engine, the fuel valve is drawn up to ladmit more fuel, it being understood that these vapors are drawn into the carbureter in addition to the primary 'air through the passageway 8 and primary fuel through the nozzle 21.

It will be seen that the manual valve which controls the auxiliary air inlets de termines the horizontal dimensions thereof while the automatic valve, which responds to the suction of the engine, determines the vertical dimensions thereof. In this way the operator has control of the mixture for the purposes of adjustment and at the same time he may leave the carbureter to itself, once adjusted, for effective automatic operation.

I claim as new and desire to secure by Letters Patent:

l. In a carbureter, a carbureting chamber, primary fuel and air inlet means, a separate fuel nozzle leading to the carbureting chamber, a valve for said fuel nozzle, an air inlet thereto, a valve for said air inlet mechanically connected with the fuel valve, and a vertically reciprocating piston mechanically connected with said air and fuel valves and exposed to the pressure in the carbureting chamber.

2. In a carbureter, a carbureting chamber,

primary fuel and air inlet means, an additional fuel nozzle leadingr to the carlnlrctiug,t Chamber, a valve for said t'uel nozzle. an air inlet thereto. a valve for said air inlet mechanioall \v connected with the t'uel valve. a piston inechanicall)Y connected with said air and fuel valves and exposed to the pressure in the carhureting chalnlrer. and a manuall)v operated valve also controlling said air inlet.

Il. In a earlmreter, a carliureting chamber, primatv tuel and air inlet means. a separate Atuel nozzle leadingr to the earhureting: ehamher. a valve tor said fuel nozzle` an air inlet thereto. a valve tor said air inlet mechanically connectedl with thel ,tuel valve. and a piston meehanicallv connected with said air and tuel valves and exposed to the pressure in they carliuretiutr chamber.

-t. ln a earlmreter. a carlmreting chamber.

primarv t'uel and air inlet means-.a t'ueluozzle leading to the earhuretiug ehalnlier. a ta` pered-needle valve for .said fuel nozzle. an air inlet thereto. a valve tor said air inlet ineelianieall)v connected with the tuel valve. and a pis-ton meehanieall \r connected with .said air and t'uel valves and exposed tothe pressure in the carlmreting chamber.

5. In a earlmreter. a earhureting chamber. primary air and fuel inlet means, a throttle valve controlling.r the outlet, a secoudar \7 tuel nozzle. a float chamber connected with both nozzles. a vertical cylindrical valve, chamber with `side outlets. a tubular valve within said valve chamber operated manual17 to vary the ettective size of said side outlets, a piston valve in said tubular valve, a piston chamber below said vvalve ehamher. a piston in said piston chamber. a hollow .shaft connecting said pistons, said hollow shatt passing through the earhuretcr ehaniher and having its hol'e exposed thereto. the underside ot' the piston being thus` exposed to the pressure in the carlauetint` ehamlier and the other side of the piston heing exposed to the atmosphere5 said hollow shalt extending beyond the -asing, a looselyv mounted needle valve t'or the secondaiwv fuelv inlet. a carrier for said valve. and a lever engaging;v .said carrier and adapted to he engaged by a part on said shat't.

(5. ln a earlmreter.a carlmreiing chamber, primaryy air and l'uel inlet means. a secondar)v tuel nozzle. a vertical cylindrical valve chamber with side ports. a tuhular valve within Said valve chamber operated manually to var v the etl'eetive size ot said side ports. a piston valve in said tuhular valve. a piston chainher helow said valve chamber. a piston in said piston ehamlier. a shalt connecting said pistons` the under side. ol? the piston being exposed to the pressure in the carlmretine' chalnher, and the other side ol'" the. piston heine exposed to the atmosphere. a needle. valve tor the secondari' tuehinlet. and means t'or mechanically' connecting said needle valve and said piston valve.

In witness whereof. I hereunto suliscrihe my nameV this 24th daty of May, A. D. 1912.

JOHN S. GOLDBICRG.

lVitnesses:

RAYMOXD M. ANDERSON, ARTI-Ion H. BOETTCHER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D. C.

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