US1145138A - Carbureter. - Google Patents

Description

1-. s. GOLDBERG.

CARBURETER. APPLICATION FILED MAR,9,19H.

. f Patented July 6, 1915. f

A IDVELTETI I John 5. Gulrjhar A110? ngs f I v mamas.

Q tural features which tend result of the provision'of a simple effective l'll ll fil hnv JOHN S. GOLDBERG, OF CHICAGO, ILLINGIS, A SSIGNOR TO STBOMBERGE MOTG'B DEVICES I COMPANY, 01? CHICAGO, ILLINOKS, A (JORPQBATION 01E ILIJINOIS.

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To all whom cit-may concern:

.1 Be it known that 1, JOHN citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Carburetors, of which the following is a full, clear, concise, and exact description, reference'being had to the accompanying drawingstorming a part of this specification.

My invention relates to 'carbureters and its object is to provide a device.

To this end I contemplate S. GOLDBERG, a

numerous structo the general These structural feait may be said of my carburetor that it is built along the general lines of a single axis, the various parts being nested one within another so that a compact arrangement is secured.

It is usual in the art at this time to provide c'arbureters with auxiliary air inlets which come into play when and only when suiiicient suction has been created in the mix ing chamber by the suction of the engine as sociated therewith. It is evident to those skilled in the art that this auxiliary air inlet must be valve-controlled and that this valve must be automatic in its operation and it is in connection with this automatic valve that my invention provides distinctly new features of construction and operation.

It is significant in connection with my device that but one air inlet is provided for the carbureter, the variations in the amount of air admitted to the mixing chamber being se cured by changing the effective passageway rather than by-openin'g or closing a distinct and separate inlet. With this arrangement ll am enabled also to secure efi'ective start ing of the engine, by the provision of a valve in the one air inlet, as will be described. In connection with the air inlet control mechanism 1 provide a new spring arrangement which is very efiective in securing eiiicientoperation, this arrangement eliminating entirely the undesirable chattering which has been found so "frequently in valves which are designed to respond to changes in the pressure in the mixing chamber. As structural feature in this connection it will be noted that I use the very part which defines the mixing zone for the air device of few parts. tures' are such that Application filed March '52, 1911.

generally improved vedge, as will be spanning the walls of Patented. July 6, 1915.

- Serial no. erases.

supply as the movable valve member which controls the existence and size of the supplemental air passage and, as will. be evident to those skilled in the art, the result is a simple and economical structure.

\Consistently with the other features of my invention 1 provide for the ready and, com venient adjustment of the various parts'and for the cleaning thereof, the latter feature being directed mainly toward the nozzle from which the fuel is drawn. My invention is embodied in the device illustrated in the accompanying drawing, in which the figure is an axial sectionalview of my carbureter.

lhe main structural supporting element of my carburetor comprises two castings, one disposed above the other and held together in a manner to be described later. These two castings are notedin the drawings by the reference characters aand 5, the latter resting upon the former and the gasket 6 of compressible material intervening so as to provide a tight joint. 7

The structural unit 4 comprises a shelf T and twocircular concentric walls 8 and 9 extending upwardly therefrom, the former being provided with an extension in the form of a housing 10 which will be referred to later. Thecircular wall 9 forms the air passage which extends downwardly through the shell and which at-the top leads into the mixing chamber 11. A double conical hollow member 12 is disposed inside the wall 9 and the top thereof rests upon the inwardly beveled edge 13 of the wall 9, which 7 described later, constitutes a valve seat for the member 12. This member 12 is the Venturi tube which provides tor the constant air supply and the middle of which constitutes the zone in which the oil used as a fuel is sprayed, A. fuel tube 13 is supported in ax1al relation to the circular wall 9 by means of a spider 1a, 15, preferably integral with the tube and the wall. as a single casting. The tube can tends downwardly below the shelf 7 and is formed for the reception of a rod or post 16 which is passed upwardly therethrough and is threaded at its end into a bridge 17 the mixing chamber The head of the post 16 engages the the tube 13 and it will be clear tie rod for holding in the relation ll. bottom of that the post terms a the castings a and 5 together red 16 and the-sleeve. 20.

shown. The top of the'fuel tube 13 is beveled inwardly and a collar 18 which is passed down over the' post '16 has a. correspondingly formed surface resting thereon. This surface is provided with a plurality of radial grooves 19, 19, through which, as

will be described, the oil is drawn by the action of the engine. The Venturi tube 12, which has hereinbefore been referred to, is provided with an internal. spider which has the axial sleeve 20 through which the rod 16 passes, all as clearly illustrated in the figure It will be clear that the Venturi tube has vertical movement and that this movement is elfectively guided by means of the The .member 12 has secured thereto a. downwardly extending rod 21 which passes through and its guided in an opening 22 in the spider 14. This rod is screw-threaded at its end for the reception of a nut 24 and a helical spring ;2;? w*is disposed about the rod between this'L-nut and the spider 14. This arrangement tends to hold the "member 12 upon its seat 13 and the amount of ten-. sion which is exerted in'this behalf can be adjusted by "turning the nut 24 upon the rod in an obvious manner; The nut 24; is provided with a transverse saw-cut 25 which is adapted for the reception of a cotter pin 26 which may be inserted in 1. transverse opening inthe'rod. In this way the nut may be locked in any adjusted fposition. A helical spring 27 is disposed, be tween the top of the collar 18 and the under side of the spider which connects the 'sleeve 20 with the tube 12. This spring tends to lift the tube 12 from its seat and therefore acts in opposition to the spring 23. It is thus seen that the valve formed by the tube 12 is balanced between the tension of the two springs and the oppration will be hereinafter described. 1

The "compartment between the circular walls 8 and-9 provides a float chamber in which an annular float 28 is disposed. T is float is attached to a swinging arm 29 which is pivotally mounted upon a pin 30 extending across the. end of the housing 10. As the float rises or lowers subject to the level of the oil contained in the float chamber, the swinging member 29 may respond by mov ing on its pivot. The member 29 is in the form of a yoke, and'carries a stamping 35. This stamping has acentral openine'through which a valve stem 33 exte .ds, this valve stem having threaded engag ment with the stam ping. The stem fidextendsdownwardly through an opening 36 in the casing and, below this opening, is provided with a. valvb piece 37. The valve piece is disposediiar a valve chamber or poclrt 38 which is closed by means of aplug 39 having threaded engagement with the casing. The plug 39 is provided with a pocket 40 and a helith'eoil .to be used as a fuel.

,the admission of more The air passageway through the tube 9 is supplemented at the bottom by a horrid? cal spring 41 is disposed-in this pocket and is extended up to the valve sothat it may exert an upward pressure on the under sidethereof. It is clear that the valve 37 cons.

trols the opening 36 and the stem is provided at its bottom end with a transverse passageway 42 with a pocxet 4:3- ingthe' casing which is internally screw-threaded for the-reception of a union 4.4., this union being suitably connected with the supply pipe45 which leads to the tank containing screen ddis provided inthe pocket 43 so as A. straining to prevent solid impurities from clogging float chamber, however, the fioat rises and this action, together with the spring, en-

'tirely, or at least nearly, closes the valve so as to cut off further supply. for the time be ing. As the oil becomes depleted the float drops and the passagevgay 36 is opened for uel.

which is in the form of a horizontal pipe with a. vertical outlet.

passes downwardly through this 'verti cel outlet and through a. registering opening 18 in the bottom of the horn. The bottom oftends beyond. the casing proper and is pro vided at its end with a double operating lever 53. This operating lever may be conits nected by suitable linkages with operating- '1 mechanism within the control of the person.

running the engine. The hub of the s am...

ingficver 53 is provided with a pair-cfnotches- 55, 55in either of which aspiring pressed plunger 56, suitably mounted-inthe 1.1:? casing, may be disposed. This plunger will hold the gate valve in either of its two extrenie positions with reasonable security sof that it cannot be jarred or, accidentally moved out of place. Itwill'now be seen 5 that the air comes in at the horn i7 and is there controlled by the gate valve 50. It

then passes upwardly through the central passageway defined bythe wall. 9 and either and The fuel tube "528?;

chamber 11 and then passes on memes through the Venturi tube alone or both through and around it, depending upon the position of'it relative to the valve seat 13. The air then proceeds up to the mixing to the engine, the Connection between the mixingchamher and the engine being controlled by a throttle valve 57 mounted upon a transverse shaft 58. I I

The float chamber is connected with the interior of the fuel tube 13 byzneans of the passageway 68, the passageway 69, and the restricted passageway 70. The last-named passageway is controlled by means of a needle valve 71, the stem of which has threaded engagement with the casing and extends out beyond the same where it is provided with a finger piece 72. A stuffing gland 73 may, be provided for obvious purposes. When it is desired to adjust the flow of oil from the float chamber into the interior of the fuel chamber 13' the finger piece 72 may be ma nipulated in the desired direction so as to move the tapered end of the needle valve toward or away'from the openin 70. Thewall 9 is provided with an enlargement 7a in the form of a vertical ridge and here a longitudinal passageway 75 is provided. This passageway connects with the float chamber at the bottom and with the central air passage at the top near the valve seat 13. When the Venturi tube 12 is down upon its seat it is evident that all the air passing into the mixing chamber must go through the tube. The fuel nozzles 19 are disposed near the restricted area of the Venturi tube and as the air rushes upwardly through the. tube in response to the suction formed by the operation of the engine, oil will be withdrawn through thenozzles and volatization will take place' When the suction created by the engine reaches a predetermined point the tension of the spring 23, which tends to hold the Venturi tube down on its seat, is overcome and the Venturi tube israised away from its seat. When it is in this position considerable air may rush through the annular supplemental passageway 'thus formed and the demands made by the engine may be met. As before stated, the spring 27 tends to lift the valve from its seat and it is thus clear that this spring acts to assist the suction of the engine in this respect. "When the spring 23 is compressed the spring 27 is extended and there is approximately no change in the tendency of the mechanical means to hold the valve in a definite p0sition. In other words, the valve is balanced between the tension of the two springs, the lower being stronger than the other so that the valve may be retained normally on its seat. However, as the tension of one of the springs increases, that of the other decreases and the amount of opposition to the suction remains substantially if not quite lsageway 52,

adapted to the same. This effectually removes the un desirable chattering which has been found to be so prevalent in ,prior art devices and permits a more accurate adjustment in the matter. of em amount of tension which the suction of the engine is required to over cornea then the Venturi tube 12 is lifted from its seat the oil passage 75 comes into play and the air rushing causes further fuel to be picked up. The

by the opening carbureter isalso operative without the auxiliary air supply being accompanied by a corresponding fuel supply. The carbureter is operative by"v reason of the other fuel inlets alone.

When it is desired to start the engine it is necessary to have a rich mixture and in order to do this I provide means for concentrating most of the suction of the engine upon the fuel inlet while admitting onlyta limited amount'of air. This is secured y means of the gate valve 50 which. as be re described, is provided with a restricted pasthe -si-ir which enters must enter by the restricted passage 59.. This action causes most of the suction to be concentrated upon the fuel inlet and comparatively little air is provided. The closing of the valve 50 causes a considerable reduction of pressure. in the air'chamber below the automatic valve and the valve cannot be lifted from its seat by the suction in this starting action. Thus all the air entering the engine is confined to the restricted passageway around the fuel noz zle, causing a high aspirating eliect with comparatitrely little air in quantity and consequently t ric'h starting mixture.

I claim new and desire to secure ters Patent:

1. In a carburetor, a mixing chamber, an air passage leading to said mixing chamber, a fuel. nozzle in said passage, an auxiliary air inlet surrounded by a valve seat, a valve partcontrolling said auxiliary air inlet and set upon said seat, resilient means tending to raise said valve part from said seat, aiid stronger resilient means tending to hold said valve part upon said seat.

2. In a carburetor, a mixing chamber, an air tube extending downwardly from said mixing chamber and forming a valve seat at the top thereof, a spider extending across said air tube, a fuel tube carried by said spider and mounted in axial relation to said air tube, a movable tubular member normally resting upon the top of said air tube and surrounding part of said fuel tube, and a spring between said spider and an element carried by said tubular member for holding said tubular member down on the top of said air tube.

3. In a carbureter, a casing having an air inlet, a mixture outlet for connection to an internal combustion engine,

by Letand a divided Q0 and when the gate is closed, all

- is open there will be substantially full at assage connecting said inlet and outlet, one hranch of said passage being always open, a valve part for controlling the other branch of said passage, said valve part being respoiisive to the higher suctions of the engine with which the carbureter 15; connected, a

throttle in said mixture outlet, a fuel-nozzle disposed exclusively in the first-named branch, and a manually-controlled valve in said air inlet, said air inlet being otherwise unobstructed so that when the valve therein mospheric pressure exerted upon the underside of said valve part while the engine is operating regardless of the position of the throttle. v

4;. In a carbureter, a casing having an air inlet, a mixture outlet for connection to an internal combustion engine, and a divided assage connecting said inlet and said outet, one branch of said passage being always through said first-named branch but not sub ject to the aspirating efi'ect-of the air passing through said second-named branch, a throttle in said mixture outlet, and a manuallycontrolled valve in said air inlet, said air inlet being otherwise unobstructed so that when the valve therein is open there will be substantially full atmospheric pressure exerted upon the underside of said valve part while the engine is operating regardless of the position of the throttle.

' 5. In a carburetor, a casing having an air inlet, a mixture outlet, and a divided pasmamas sage connecting said inlet and outlet, one branch of said passage being always open, a valve part for controlling the other branch of said passage, said valve part being responsive to the higher suctions of the engine with which the carbureter is connected, a throttle insaid mixture outlet, a fuel-nozzle disposed exclusively in the first -named branch, and a manually controlled valve in said air inlet, said manually'controlled valve when in its closed passageway for a minimum admission of air.-

6. In a carbureter, a casing having an air inlet, a mixture outlet for connection to an internal combustion engine, and a divided passage connecting said inlet and outlet, one branch of said passage being always open, a valve part for controlling the other branch of said passage, a spring tending to hold said'valve part in closed position, said valve part being responsive against the tension of said spring to the higher suction's of the engine with which the carbureter is connected, a throttle in said-mixture outlet, a fuel-nozzle disposed exclusively'in the first-named branch, and a manually-controlled valve in said air inlet, said air inlet being otherwise unobstructed so that when the valve therein is open there ,will be'substantially full atmospheric pressure exerted upon the underside of said-valvepart while the engine is operating regardless of the position of the throttle.

In witness whereof, I hereunto subscribe my name this 4th da of March, A. D. 1911.

' J O N S. GOLDBERG.

i/Vitnesses:

RAYMOND M. ANDERSON,

ARTHUR H. Bonrronnn.

position leaving a

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