US1350151A - Vacuum-feed carbureter - Google Patents

Description

P. P. GILLES.

VACUUM FEED CARBURETER. APPLICATION FILED 0CT.14,1918.

1,350, 15 1 Patented Aug. 17, 1920.

IIIIIIIII WITNESS: I VENTOR. mafia, yiflf/j BY v A TTORNEYS UNITED STATES 'PIERRE P. GILLES, OF SPRINGFIELD, MASSACHUSETTS.

VACUUM-FEED GARBURETER.

Specification of Letters Patent. Patented Aug; 1'7, 1920,

Application filed October 14, 1918. Serial No. 258,091.

To all whom it may concern .1 V

Be it known that I, PIERRE P: GILLEs, born in Switzerland of German parentage, now believing myself tobe a citizen of the Swiss Confederation, and having formally declared my intention of becoming a citizen of the United States of America in conformance with the United States immigration laws, and now residing at Springfield, in the county of Hampden and State of Massachusetts, United States of America, have invented certain new and useful Improvements in Vacuum-Feed Carbureters, of which the following is a specification.

This invention relates generally to that class of devices, by means of which fuel may be drawn by suction from a low level supply tank into a carbureter. More. particularly, the invention is concernedwith the provision of improvements, which are especially applicable to a vacuum feed carbureter, although the improvements are capable of general application, if desired. By a vacuum feed carbureter is meant a unitary structure resulting from a consolidation of a carbureter with the vacuum feed fuel supply device. One type of vacuum feed carbureter is disclosed in my prior U. S. Letters Patent No. 1,240,842 granted September 25, 1917.

In the usual vacuum feed system, the outlet of the fuel supply or suction chamber is provided with an outwardly opening check valve and is then connected to a carbureter of any standard type. All standard carbureters are provided with afloat in the carbureter fuel chamber and the inflow of fuel to the latter is controlled by a needle valve,

which is operated by rise and fall of the float. The needle valve is, thus, the means ordinarily employed to regulate the fuel level in the carbureter and the check valve is provided,'by necessity, to prevent inflow into the fuel supply chamber when suction is applied thereto. The usual needle valve is a source of much trouble in that it sometimes does not seat accurately, and therefore leaks, and at other times sticks, and therefore fails to open at the proper time. The regulation of fuel level by the usual float controlled needle valve is thus not as positive and accurate as could be desired. Moreover, two valves,the needle and the check valye,-are employed, both. separately performing individual functions.

This invention has for its object to provide, in combination with a fuel feeding device and a carbureter, a single valve to control the communication between said device and carbureter and means operable from a float in the carbureter to control the opera tion of the valve, characterized in that the one valve acts as a check valve for the fuel feeding device and controls the fuel level in the carbureter, as well.

Another object of the invention is to provide a combined fuel feeding device and carbureter; in which these two elements, generally used separately, are consolidated into a unitary structure, with the elimination of the usual'needle valve control of the carbureter and the substitution of improved means, which are operable from the carbureter float and arranged to combine with the check valve of the fuel feeding device, to the end that such check valve is made to perform its usual function and, in addition, the function of controlling the fuel level in the carbureter.

Other objects and advantages will appear from the following description and from the illustrative embodiment of the invention in the accompanying drawings, in which:

The figure is a sectional elevational view of a vacuum feed carbureter embodying the invention.

Referring to this drawing in detail; a fuel feeding device and a carbureter, (both of any suitable type and herein shown merely in a conventional and convenient illustrative form) are combined into a one piece, unitary structure. tion of the two known elements involves a casing A having two separate chambers B and C, preferably arranged at different levels, as shown. Chambers B and C will be later referred to as the fuel supply and the carbureter fuel chambers, respectively. Chamber B is provided with a suitable cover Z) which is so applied as to render the chamber substantially airtight, exceptfor certain passages to be later described. Chamber C preferably also has a cover, as 0, although this is not absolutely essential, and if provided means, as an opening cl in the wall of chamber C, should be provided to insure that the latter will be subjected to atmospheric pressure.

The fuel supply chamber B is provided with a fuel inlet 7 adapted for connectionto a low level supply tank; an air inlet 57, and

Such consolida- Means are provided so that the chamber B is alternately subjected to suction and atmospheric pressure and such means are controlled by the level of fuel in the chamber. Any suitable means may be provided for this purpose and that chosen is merely by way of illustrative example of one suitable means. As illustrated, a valve 2', supported by the free end of a pivoted arm j, is ar rangedto open or close the suction connection h, and a valve is, operable from an extension 1 of valve 2', is arranged to open or close the air/inlet g. The arrangement is such that valve i-will open when valve 7:: closes and vice versa. In order to operate these valves, a float m is provided in chamber B and such float is plvotally connected to the free end of an arm n which in turn is pivoted co-axially with arm j. A spring 0 connects the free ends of arms j'and n.

Thus, as float m falls, arm n will be gradually swung downwardly,fbut arm j will not be moved until the spring 0 is brought-below the pivotal axis of the arms. At such time, arm j will be rapidly moved downwardly to open valve 2' and allow valve to move to closed position. Upon a rising movement of float m, arm n will be gradually moved, but arm y will not be actuated until spring 0 has been brought above the pivotal axis of the arms, at which time the arm j will be suddenl moved to open valve k andclose valve 2'. Thus, chamber B is alternately subjected to suction and atmospheric pressure for thefpurpos'e of drawlng fuel therein from the lowlevel tank and permitting such fuel to pass therefrom by gravity flow, all in a manner well understood by those skilled in the art.

The chamber C is the carbureter fuel chamber, the equivalent of the usual float chamber. Any suitable or desirable carbureterstructure may be provided and the present illustration is merely conventional. As illustrated, 10 represents (in cross section) the usual air intake pipe and g is a suitable nozzle or atomizing device, which is fed with fuel from chamber C by way of a short lateral passage 7'. i

I In order that fuel the supply chamber B may pass by gravity flow into chamber C, a passage 5 is provided in casing A, which passage affords communication between the lower portion of chamber B and the chamber C, preferably above the level of fuel 1n the latter. In order that there shall be no return flow from chamber G to chamber B, a check valve 6 is provided for the passage 5 andsuch valve opens outwardly (1n the direction of fuel flow) and into the chamber C. The valve 6 performs the usual function with relation to the fuel feeding device and is made to perform an additional function,namely, the regulation of the fuel level in chamber C,by'the following means. A float 7 is provided in chamber C and the upper portion of such float is pivotally connected to the outer end of an arm 8 which is suitably pivoted at 9 to casing A and within chamber C. Arm 8 has an upwardly directed extension 10, which, when the fuel in chamber C is at the desired predetermined level, engages valve 6 and holds it in closed position to prevent further flow to chamber As soon as the fuel in chamber C falls below the desired level, float 7 falls also and thereby arm 10 is moved toward the right, allowing valve 6 to open and the chamber G to be replenished with fuel.

Thus, I have provided in associated relation, a fuel feeding device and carbureter,-

fined by the appended claims rather thanv by the foregoing description. What I claim is,-

ent levels and a passage affording communication between the lower portion of the upper and .theupper portion of the lower chamber, a float in the upper chamber, means controlled by said float to draw fuel in the lower chamber, a float in the latter, a

single clack valve controlling said passage h and opening into the lower chamber, and means operable from the second float to close said valve when the fuel in the lower chamber reaches a predetermined level and to release said valve when the fuel in the lower chamber fallsbelow such level. I

' 2. A vacuum feed carbureter, comprising a fuel supply chamber, a float therein, a valve controlled by the float operable to draw fuel into said chamber, a second valve operable'by said first-named valve to alternately subject said chamber to suction and atmospheric pressure, a carbureter fuel chamber, an atomizing device connected therewith, a passage connecting the cham- 1. A vacuum'feed carbureter, comprising, -a casing provided with chambers at difl'erinto the upper chamber, an atomizing device here, a clack-valve normally closing said passage but adapted to be opened by the weight in the fuel supply chamber, a float in the carbureter fuel chamber, and means operable by said last-named float to positively close s'aid-last-named valve.

- 3. A vacuum carbureter, comprising a fuel supply chamber, a float therein, means controlled by the float operable to draw fuel' into said chamber, a carburetor chamber, an

to be opened bv the weight of the fuel in the 1 fuel supply chamber, a float in the carbureter' fuel chamber, and a float operated bell-crank having a short arm bearing on said clack-valve and adapted to hold the I same in closed position when the fuel in said carbureter fuel chamber is at the desired predetermined level.

4:. A vacuum carbureter, comprising a fuel supply chamber, a float therein, meanscontrolled by the float operable to draw fuel into said chamber, a carbureter chamber, an atomizing device connected therewith, a passage connecting the chambers, a valve normally closing said passage but adapted to be opened by the weight of the fuel in the fuel supply chamber, a float in the carbureter fuel chamber, and a float operated bell-crank having a short arm bearing on said Valve and adapted to hold the same in closed position when the fuel in said carbureter fuelchamber is at the desired predetermined level.

PiERRE P. GILLES.

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