US1183538A - Carbureter. - Google Patents

Description

J. C. C OLLETT. CARBURETEB. APPLICATION FILED FEB. 2. I914. 1,183,538. Patented 11113 161916.

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J. C. COLLETT.

CARBURETER.

APPLICATION FILED rss. 2. 1914.

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Patented May 16, 1916.

2 SHEETS-SHEET 2.

JOHN C. OOLLETT, O13 DAYTON, OHIQ.

CARBURETER.

Specification of Letters Patent.

'lh I a r a atented. Illa Ill-i,

Application filed February 2, 1914. Serial No. 315,9Ut.

To all whom it may concern.

lie it known that 1, JOHN C. CoLLnrr, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Carburetors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates, to new improvements in carburetors.

The main object of my invention is to provide a carbureter which has a maximum of ellieicncy and is simple in construction.

With the above object in view. the invention consists in the main of an inner tubular member in which a jet-nozzle is placed and which furnishes a constant air passage to said nozzle; a chamber surrounding said tubular member from which a variable supply of air is furnished to the space above said inner tube and jet nozzle, and a valve controlling the admission of air from said chamber, said last named valve surrounding: the inner tubular member and constructed and arranged to actuate a needle valve which controls the jet-nozzle.

Another object of the invention is to provide means for preventing any fuel, which may carburetor, being deposited on the air valve and the subsequent liability to choke the carlun'eter when the engineis started.

lleierring to the accompanying drawings,

and useful Figure 1 is a vertical sectional view of the being on the hue cZ-cZ carbiu'eter, be same of Fig. 2; Fig. 2 is a section on the line (L-(Z of Fig. 1; Fig. 3 is a'view similar to Fig. 1, showing a. modified COllStlllCtlOIl oi. the needle valve; Fi 4 is a detail view of the air and fuel valves shown in Fig. 1 with the parts shown in a di'fi'erent position; Fig. 5 is an enlarged detail view of the fuel valve; Fig. 6 is a section on the line b-b of Fig". 1: and Fig. 7 is a section on the line 6-4 of Fig. 1.

Throughout, the specification and drawings, similar reference characters indicate corresponding parts.

Referring more particularly to the drawbecoine condensed in the manifold and lugs, 1 represents a shell which, together with an inner tubular member 52-, forms oil. or float-chamber i 'lflre top cover of said clnunber consists of a cap at secured to the upper end of the inner tubular member E2. The lower end of said tubular member 2 is provided. with a bottom 5 iv fch instrumeutal in uniting; the parts 1, at. above ieterred to. 'ihe tubular member 2 forms an o'ute air-chamber (3 for additional air. Mounted within said air-chamber a tubular member 7 which forms a central contracted passage for the constant air snoply. Within the tube '3 a nozzle or iuel-ict S is placed which communicates with the oil or lioat-chambei. through horizontal tn bular member t), the latter lllellllOel also sun ports the tube '3'. lilOlUllQCl in the chanil r 3 1s the usual lloat connected. with a 11 pivoted at 152 and in turn coir'ieet a :tuel-inlet-valve 13 i'uouni'ed in an 0 ll of the shell 1. hilounted below the inner tubular member 9. and communicating therewith is an air-box secured to d morn-- her 2 by a stem 16. The said air-box it is provided. with a suitable valve 1'? which, when closed, diminishes the supplv of air to the earbureter, thereby permittingricher fuel or mixture to be obtained and thus p o moting starting; of the engine. Tue

cap l is provided. with a passage 18 for the iuel or mixture and a 'throttlewal 6 i9. is portion oi the air passing thron b. the airbox to enters the tube Y and, under the influence of the partial vacuum produced by ated by the engine, mixes iv th the suction eV the fuel issump,- from the f producing the fuel e. When the demands the en; larger amount of than that through the tune edd'tional a" in supplied from. the

hatoher which is controlled by an automatic valve of e culiar structure and operation. This valve 20 cooperates with seat 21 extending iroro. the inner side of the tubular member and is integral with. a sleeve 22- vertically and freely movable on the inner tube A. The lower of said sleeve 22 has enlarge ment or cireum'ferent' .l flange which is instriunental in providing an annular recess around said sleeve which, through the effect of the air, is instrumental in maintaining; the valve 20 in a balanced position. no

example, when said valve is elevated so .b

l 0 ii lei said valve and the llange $33 will. be up iroro iniately equal distances from the seat 21, the effect of the air on the under side of said valve and on. the upper side of said flange will be substantially equal, thereljiy balancing said valve aud'preventing any further elevation thereof. Thus the flange 23 in connection with the weight of the valve and the effect of the air serves to prevent said valve from opening too quickly, while at the same time permitting, it to readily respond to the demands of the engine, admitting additional air in proportion to such demands.

It will be undcrslmod that when air is supplied through the auxiliary valve 20 to the n'iixture, an additional amount of oil is admitted through the jet-nozzle. By inixtore, it will be understood, is meant the product after cominiugling with the constant air supplied through the tube I For this purpose the jet-nozzle 8 is provided with a needle-valve 25 which is suitably shaped, as is shown in 5, to furnish the proper amount of oil. This valve, as illustrated in 1, is attached to a stem ported in an adjusting member 27, having bearing in the cap 4:. 'By means of the soljusting member 27, the normal relation be tween said needle-valve and the jet 8 is regulated. When the air-valve 20 is elevated. through the partial vacuum produced by the suction created by the engine, the needle-valve 25 is also elevated through. the agency of a yoke 28 extending" from the valve 20 and engaging a shoulder 29 on the stem 26 of said valve. It will beobscrvsd that the needle-valve passes through an aperture in said yoke. The arrangement is such that a. definite proportion of oil and air will be maintained irrespective of the volume of mixture or the demands of the en.- gine. To prevent the mixture becoming overcharged with oil when the air-valve 20 initially open, the shoulder is so placed as to permit of an initial free movement of said valve before the needle-valve is actuated thereby. In Fig. 3, I have shown a modified construction and arrangement in which the needle-valve 31 is adjustably mounted in and is carried directly by the yoke 28. The valve, thus shown maybe adjusted by removing the cover 4. This construction also allows the passage for the mixture to be fill-in alinement with the center oi the carbureter, thereby permitting the carburetor to be symmetrical in appearance and the air to pass directly thercthrough with no cross or counter currents.

To prevent any condensation by the manifold, collcctin on possibility 0t SlllJSGqilQZll) choking oi: the carburetor when the engine starteo or socelerated, thevalve seat 1 is provided with an annular pocket 32 adapted to collect any 26 sup the valve seat :21 and the evaporation due to condensation when the carlmrcter is in operation.

To elevate the height of the oil level in the float-chamber and to thus promote easy starting, the pivot 12 of the float lever 11 is adapted to be manually elevated The pivot of said lever 11 ismounted in a yoke 3lpivotally secured to the lower end of an adjusting screw 35 mountird in a vertically slidable block 36. The block 36 is journaled in a cap-housing 37 which forms a cover for the oil-set ii. The block 36 is provided with cam-slots which receive the ends 39 of a slidable member 40 mounted in the cap-h0using 37. The member l0 may be actuated from the front of the radiator (not shown) or from the dash by any suitable connecting means (not shown). member ll) is drawn outwardly, the block 36 and thepivot 12 are elevated, thereby raising the float level and permitting the float 10 to rise toagreater height before closing the inlet valve 13. The float level in the chamber 3 is regulated by the adjusting screw 35 while the slidable member 40 is held in either of its shifted positions by pockets ll in the cam-slots 38. Y

Having described myinvention, I claim: .1. In a carburetor, the combination with a jet-nozzle, and a needle-valve cooperating therewith, of 'a tube surrounding said jetnozzle and furnishinga constant supply of air thereto, an. air valve through which additional air is supplied to the space above said jet-nozzle, the supply of air to said tube and air valve being adanitted below said tube, a. connection between said needle- 'alve and said air valve, a sleeve extended from said air valve terminating in an annular enlargement which together with said air valve provides a circumferential recess around said sleeve, and a shell surrounding said a' valve and sleeve and providing an air passage to said air valve, and a seat for said air valve.

2. In a carburetor, av shellproviding an air-passage and a valve seat, an air-valve co-acting with said seat in providingavariable supply oi air to the upper port-ion of said shell, a needle-valve, a. tube through which a constant supply of air is furnished to said needle-valve, and a yoke ergtending from said air-valve and through which said needle-valve is guided and by which said ncedlcwalve is subject to movement from said air valve.

3. In a carburetor, the combination with a shell providing an air-passage, and a valve seat, said valve seat being constructed to provide an annular pocket on the-interior of the shell and around the valve seat, an airvalve cooperating with said seat to control the :ulmission of additional air, a tube providing a. constant air-passage and upon which said air valve is mounted, a needle- When the slidable its a needle-valve having a 1,1ea,53e

latters opening is increased.

4. In a carbureter, an inner cylinder, a jet-nozzle lying Within said cylinder and surrounded by a constant air passage, an outer cylinder surrounding said inner cylinder and providing an air-chamber therearound, a variable air-supply-valve surrounding said inner eylinder and controlling the admission of air from said chamber to the space above the inner cylinder, and shoulder controlling said jet-nozzle, said needle-valve adapted to be actuated to increase the jet opening by he movement of said variable air-supplyvalve subsequent to the initial movement of said air supply valve.

5. In a carbureter having a central airpassage, a tube mounted in said passage and dividing said passage into inner and outer passages, a. jet mounted in said inner passage, an air-valve mounted on said tube and controlling said outer passage, a fuelvalve to feed said jet actuated by said airvalve, said air-Valve having an initial moveinent independent of the fuel-valve.

In testimony whereof I afiix my signature, in presence of two Witnesses.

J OHN C. COLLETT.

Witnesses:

NELLIE GALLOWAY, MATTHEW Summit.

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