USRE15749E - Device - Google Patents

Description

Jan. 22

Re, J. C. COULOMBE FUEL] FEEDING DEVICE 2 Sheets-Sheet l 7 Original Filed Jan. 15, 1916 1 INVENTOR :Iosepb C. Coulomb! ATTORNEY J. C. COULOMBE FUEL FEEDING DEVICE Jan. 22, 1924.

Original Filed Jan. 15'. 1916 2 Sheets-Sheet 2 INVEINTOR r Joseph C. Coylombe;

ATTORNEY Reissued Jan. 22, 1924.

UNITED STA TBS JOSEPH? G. 'COIl'LOMBE, OF KOKOMO, INDIANA.

FUEL-FEEDING DEVICE.

Original F0. 1,895,224, dated October 25, 1921, Serial K0. 72,193, filed January 15, 1918.

filed September 20, 1923, Serial No. 663,928.

rein-ac T 0 H76 whom it may concern Be it known that I, .Tosnrn C. COULOMBE, a citizen of the United States, and a resident of Kokomo, in the county of Howard and State of Indiana, have invented certain new and useful Improvements in Fuel-Feeding Devices, of which the following is a specification.

The invention relates, as indicated by its title, to a fuelieeding device,-although it is applicable o any use in which itis desired to automatically raise from alow level supply, and distribute to a source. a liquid, which will always be under a substantially constant head and flow.

The object of the invention is to provide a simple apparatus in which, through the action of a reduced atmospheric pressure, a

constant head or volume of flow may be secured to a given source, under all varying conditions of sub'atmospheric pressure and under all varying conditions of utilization of the flow of liquid to the point of supply.

A further object is to maintain. under all varying sub-atmospheric conditions, produced by the source of utilizing the fuel, a means for providing substantially constant conditions of delivery commensurate with all variations of sub-atmospheric conditions and adequate for the supply of fuel for all conditions under which the varying subatmospheric conditions are developed.

A still further object is to provide a primary and a secondary valve arrange ment for initially and finally breaking the suction or sub-atmospheric, condition of a suction chamber, so that the suction of a sub.- tion chamber may draw up a 'fluid from. a low level tank and upon neutralizing the suction, said li'quidwill discharge by gravity from the suction chamber.

It is also an object of the invention to providemeans for readily securing a subwatmopheric pressure by utilizing the inertia of a current of'a moving fluid in conjunction with afspeclally designed nozzle. I

It is admittedly not new in the art to provide a means for raising a liquid through the actionof reduced atmospheric pressures so that the liquid may be distributed to any given point above the source of liquid supply. Various mechanisms have been devised for producing such a result, and the apparatus herein shown and described, while Application for analogous to, my prior co-pending applications, Serial 0. 32,927, tiled June 8, 1915, and Serial No. 58.253, filed October 27, 1915.

Inprior devices, so far as known to applicant and in fact in applicants prior devices referred to above, there has been no adequate provision for insuring against flooding, due to the raising and lowering of the car or other device having a supply tank, which willnorrnally and momentarily give a free feed of fuel to the fuel feeding device.

Furthermore, in devices as referred to,

no provision has been made for insuring a proper feed under suction influences due to they varying conditions of suction of the engine when said engine is running on very high or very low speeds.

In devices of the art, suction of the em gine has been relied upon for drawing up the liquid or fuel into a suction chamber, and such devices have had a float controlled valve for determining the amount of fluid or fuel which should flow into the distributer chamber. These float controlled valve devices have been controlled, in a measure, by a valve which would break the suction or vacuum-effect upon certain rising of fluid or fuel in the chamber and would thereupon deliver a quantity of liquid or fuel from the suction chamber to the distributor chamber.

In these devices, reliance has'been placed upon floats and valves in which the weight of the float and its buoyancy have been a determining factor. After the buoyancy of the float has been destroyed or ,made negligible, there has been are-action upon the valve controlled thereby so that the liquid or fuel was delivered. after or at about the time or period that the sub-atmospheric suction condition was destroyed or broken.

In the present device, provision has been made for an initial. breaking or disrupting of the suction condition or sub-atmospheric condition so that the float or other controlling device of the valve will actinore readily to provide a full actuation of the main valve.

"In the present device, provision has been .made for the sub-atmospheric conditions.

and at the same time to provide for unusually strong or ,qbnormal sub-atmospheric conditions. The principle is based upon maintaining a vacuum or sub-atmospheric is a distinct improvement n on 3 condition in the vacuum chamber without submitting said chamber to the unusual stresses which may occur from variations in the suction device (or manifold) which produces the suction effect upon said chamber.

The device is essentially designed to operate upon given or varying suction effects as they may actuate the devices in the suction chamber, but a further provision is made for controlling the flow of fluid or fuel into the suction chamber .whenever the source of said liquid or fuel has a gravitational effect or flow with reference thereto. Such a condition arises when the source is raised above the point of distribution or suction.

Referring to the drawings:

Figure 1 is a vertical section illustrating the mechanism.

Figure 2 is a top plan view.

Figure 3 is a detail sectional View of the auxiliary float of the liquid supply inlet.

Figure 4 is a diagrammatic view illustrating the arrangement of the several elements in conjunction with the liquid hydrocarbon motor.

Fig. 5 is a vertical section similar to that of Fig. 1, illustrating a slightly modified arrangement.

Fig. 6 is a detail view in cross section through the device of Fig. 5.

Fig. 7 is a detail view of the suction nozzle.

Fig. 8 is a sectional View through the nozzle and appurtenant parts illustrated in Fig. 7.

Referring first to Figs. 1 to 4 inclusive and Figs. 7, 8, there is shown a main fuel supply A, connected by a pipe 1, with a distributing device 13, which has a pipe connection 2, for providing sub-atmospheric conditions in the distributing device'B, said connection being made with the suction side of an'engine or like device. As illustrated, the connection 2, extends to the manifold or the main pipe connection intermediate the mani told and the carbureter mechanism D.

The distributing device B, consists of a substantially cylindrical casing 3, forming a vacuum chamber 4, and separated by a plate 5, from a distributing chamber 6. The distributing chamber. 6, is of cylindrical form, and the preferable construction is to clamp the separating plate 5, between 0 posed flanges upon the tubular portion 3, and the tubular portion 6; The distributor B, has its upper chamber 4, connected through the suction pipe line 2, and valve nipple 7, with. a nozzle 8, hereinafter described and which projects into the main suction line of the engine C, or similar device.

The chamber 4:, communicates through the pipe line 1., with the source of liquid supply carried'in the tank A. It has, as illustrated in Fig. 3, a nipple 9, appended thereto,

-the port 12, and cut oil further which has a cylindrical screen 10, which serves as a retainer for a buoyant float 11. This float 11, is intended, whenever there is an undue rise of liquid in the chamber 4, due to undue suction or due to the raising of the source A, above the distributing device while the same is under suction in the receptacle 4, to close the inlet port 12, of the main pipe line 1.

Under ordinary circumstances, the float 11. would remain inoperative. In the event of the liqpid level in the chamber 4, rising to an on no level the float 11, would close supply of liquid to the chamber 4, so that there can be no undue flooding or undue rise in the level of the liquid or fuel within the chamber 4.

This float 11, with its valve for closing the inlet 12, is designed to insure proper action, even when the supply tank A, is raised higher than the distributing device B. Such a condition could readily be maintained upon a boat or any vehicle of any character and size, and will re-act to prevent undue flooding of the receptacle or chamber 4:.

Within the chamber 1 is arranged a float spindle 13, secured to the upper head 14, of

the casing and provided with a camha-ving a long gradual slope 15, and a short slope 16, to control, in a measure, the riseand fall of a buoyant float 17. There is a pronounced shoulder 15, between the cam faces 15, and 16.

The float spindle 13, projects through a bushing 18, arranged in the float 17, said bushing 18,. having locked to its upper end by a nut 19, spring fingers 20.

The spring fingers 20, are designed to ride over the cam surface 15, upon an upward movement of the float 17, and to hold temporarily upon the cam face 16, when conditions are such thatthe float should drop.

The lower end of the member 18, has a sliding pin and slot connection 21, 22, with a valve-lever 23, which, as illustrated, is pivoted as at 24, to a suitable bracket 25.

This valve-lever 23, at its forward end,'is pivoted as at 26, to the upper section 27, of

a valve stem which controls the operation of a primary valve 28, and a main valve 29.

The primary valve 28,. and a main valve 21%, control a port 30, between the chamber 4:, and the chamber, 6, and the valve 28, is.

formed upon the upper end of the lower valve stem 31. The valve 28, controls a port 32, and the lower section of its stem 31, moves in a guide piece 33.

It is quite obvious, from the above description, that as partial vacuum is produced in the chamber 4, liquid will be drawn into said chamber through the pipe line 1, past the float 11, and'through its port 12. As soon as the level of liquid rises sufiiciently, the float 17, will be raised, and due to the spring-fingers 20, will be slowly forced up "1 5, and cam 16,

until it opens the valve 28. During this operation, air will percolate into the chamber 4, reducing the suction effect so that the main valve 29, may be more readily opened by the float. A further movementof the float over the shoulder between the cam will open the main valve 29, and thereupon, the liquid in the chamber4, will pass into the chamber 6.

Chamber 6, is open to atmospheric pres sure through a connection 34, which extends upwardly through the chamber 4, and terminates in a splash pot 35.

' The purpose and object of the primary and secondary valves should be obvious. With the float at its lowermost position and the compound valve closed, a suflicient quan tity of liquid enters the chamber 4, to raise said float which Will open the small valve 28 There-upon, atmospheric air will bubble through said valve and partially break the vacuum in the chamber 4. The float is then enabled to readily open the main valve 29,

even against the vacuum which holds it to its seat. With this arrangement, a very delicate adjustment can be secured with reference to the buoyancy of the float, the

. height of the liquid and the proper opening ofthe valve 28, 29, to permit said liquid to pass iuto'the chamber 6. From the above,

it is obvious that the compound valve opening against the induced suction, will permit the use of a, comparatively small float even with a main valve having a comparatively large area.

The suction connection 2, may be made direct with the chamber 4, but In order to insure a delicate action, it is desirable to have said suction connection open with full force and effect within operative limits, and then restricted to a degree which will not destroy the sub-atmospheric condition of the chamber 4.

It is quite obvious that with an engine running at varying speeds, there might be certain high speed effects of a momentary character which would cause undue reduction of pressure in the chamber 4, with a consequent oversupply of liquid in said chamber. Any valve mechanism which would positively shut oil allthis suction e-fi'ect, would undoubtedly interfere with a delicate re-action of the parts..

To overcome these difliculties the nipple 7, is provided with a valve seat 36, upon which normally rests a valve 37, whichhas a suitable playahetween' theseat of the valve 36. and the opposed valve seat 58. Ordinarily, under varying suctions, the valve 37, would flutter between its seat and the seat 38. In. the event of undue suction,

it would be drawn. against the seat 38.

About the valve seat 38, is provided an annular passage 39, with a small. opening 40, communicating with said passage and with disposed-and slightly in advance of the center of the tube. These perforations 8", extend alongthe tube-within the manifold, and due to the inertia of the current of gases passing through the manifold. as in dicated by the arrow in Figs. 7 and 8. materially enhance and steady the suction valuesiiu the pipe line 2, and chamber 4.

'lhe inertia of the gas or liquid passing through the manifold affects the suctionvalues by increasing the suction. The location of the plug in the manifold increases the speed of the gas as it passes by it; the greatest speed of velocity being reached at the center line which, according to the laws of fluids in motion in a pipe or confined area, produces a greater depression at'this point than would exist otherwise. It 19 therefore desirable to place the radial holes just above the center line of the plug which projects into the manifold.

In Fig; 5 the same mechanism illustrated in Fig. 1 is shown with a slightly modified arrangement of float and float chamber.

In said figure, the main suction chamber 41, has a suction connection (shown wvithout the valve nipple of Fig. 1) 42, and a fluid inlet connection 43. The lower distributingchamber 44, has an atmospheric air connection 45, a primary valve 46, and main valve 47, substantially as illustrate-din Fig. 1.

There is also a. float 48, having connections with. the valves 46, 47 ,and guided by a spindle 49, all as" heretofore described.

7 Surrounding the float 48, there is a de pendent tubular member 50. which forms a float chamber 51. The tubular member 50 extends downwardly, and as the. lquid is drawn into the chamber 41, and rises carryingiwith it the'float 48, it will form a liquid seal at the lower end of the tubular member 50, sealing-the connect-ion between the chamber 41, and the float chamber 51. Oh viously, the rateor rise (if the liquid in the chamber 41, will be greater than that in the float chamber 51.- Eventually, the buoyancy of the float 48,, will carry it up to open the primary and secondary valves 46, 47 Thereupon. the level of the liquid of the chamber 41, will drop and when said level falls below the bottom-of the tubular casing 50, the liquid seal will be broken and the float 48, will drop with considerable force, posi .ment of the tively closing the primary and secondary valves 46, 47. This is due to its weight and lack of buoyancy. It is also a. fact that the tubular casing is subject to the main suction prior to the filling of the said casing with liquid.

It is to be understood that the springfingers 20, and earns 15, 16, shown and described. in conjunction with the valve stem of Fig. 1 might be dispensed with, and that the float 17, of Fig. 1 or 48, of Fig. 5 might -be relied upon to give the proper action. it

has been found advantageous, however, to utilize such an arrangement in order to first retard the buoyant action of the float 17, of Fig. 1 or 48, of Fig. 5 during the opening of the primary valve 28, of Fig. 1 or the valx e 46, of Fig. 5; then, giving a quick action for the opening of the main valve 29, of Fig. 1 or 47, of Fig 5 and subsequently giving a nick drop to the float 17, of Fig. 1 or 48, of ig. 5 to positively close the primary and secondary valves as above enumerated.

It is understood, of course, that the distributing chamber 44, is connected through a pipe line 44, with the carburetor D, or other device, to which the liquid is to be distributed. Said carbureting device may be of any well known type.

It will also be observed that the primary and second valve connections, both oi which are un er influence of the reduced atmospheric pressure of the chamber 4, of

Fig. 1 or 41, of Fig. 5, may be and accurately controlled by the float, an that it will not be necemary to employ an um usually large float to overcome the suction and permit the liquid to drop into the dis tributing chamber.

These features, in conjunction with the provision for preventing flooding when the supply tank is above. the distributea', which may be under suction, give a balance system which insures a nicety and delicacy of action under any and all conditions.

Obviously, the exact detail and arrange- ,parts and elements may be modifiedv to a considerable extent without departing from the spirit or intent of the invention which contemplates; device having a delicate, though positive operation, heretofore described.

Obviously, in such engines, the gaseous mixture is produced by the suction ofthe engine through the carburetor. It will be e ually obvious that the proper attenuation o? the gaseous mixture would be disturbed, ordinarily by breaking the vacuum of the suction chamber 4, and permitting atmospheric air to be drawn into the manifold of the en "no.

In t e arrangement herein described, the rimary valve 28,

lition of the atmospheric air throu h y Q. mgbe the ual contained in the ch r 4.

' two chambers,

upon the rise and as it opens, permits ebuL' means dependent upon This gives a complete saturation for said atmospheric air so that the chamber 4, al

ways contains a. gaseous mixture of a suf ficient richness to maintain a proper as condition in the manifold. The same 9 act results when the secondary valve 29, is open.

In fact, there is no pure atmospheric air drawn into the manifold from the suction chamber, and therefore no breaking down of the richness of the mixture produced by the suction through the carbureter.

1'11 devices of the prior art so far as known, and with the exception of the co-pending cases hereinubove referred to, the breaking of the vacuum is effected through a valve mechanism directly connected with the suction chamber, and in such devices. atmosn.

pheric air in varying quantities, depending upon throttling of the engine, is drawn into the manifold above the point of carburction. This is a fault which is entirely overcome in the apparatus herein disclosed, and the correction of the fault is largely made pos sible byv providing, a primer vaive through which a comparatively smal uantity of at mospheric air peace and ebiiliates through the fuel in the suction chamber.' This gives a full, rich mixture at all times in the suc; tion chamber.

hat I claim as my invention, and desire secure by Letters Patent is: 1. In a fuel feeding device having a sum tion chamber, A nection from the suction. chamber to a. of suction, a connection from the s etioa chamber to a source of liquid supply, said distributing chamber open to atmospheric pressure; of a valve opening between the two chambers, a primary valve and a. sec-- ondary valve controlling said opening, and means dependent upon the rise of liquid in the suction chamber for opening said valves. 2. In a fuel feeding device having a sue tion chamber, a distributing chamber, a com nection from the suction chamber to a. source of suction a connection from the suction chamber to a source of liquid supply", said distributing. chamber open to atmospheric pressure; of a valve opening ecu the a combined c ,valve and a secondary valve control. said opeu in said valves opening toward the Clistn uting chamber and means dependent fall of liquid in the suc controlling said valves.

tion chamber for tion from the suction chamber to a source.

of suction a connection from said chamber to a source of liquid supply, said distributing chamber being constantly open to atmospheric pressure; a valve opening between the two chambers, a primary valve secondary valve controlling said lei mg,

the rise of he i i a distributin chamber,

tributing chamber,

the suction chamber for opening and closing said valves, and an independent valve automatically actuated upon abnormal rise of liquid in the suction chamber for cutting off the liquid supply to the suction chamber.

4. In a device of the character described, a suction chamber, a distributing chamber, a source of liquid supply, asuction connection for the suction chamber, an atmospheric connection for the distributing chamber extending through the suction chamber and terminating at the upper end of the disa primaryvalve and a combined secondary valve controlling the flow of fuel from the suction chamber and the admission of atmospheric air thereto, and a float controlled by the liquid level of the suction chamber and controllingsaidi valves.

5. In a device of the character described, a suction chamber, a distributing chamber, a source of liquid supply, a suction connection for the suction chamber, an atmospheric connection extending to the lower side of the suction chamber, a valve-opening at the bottom of the suction chamber opening into the distributing chamber and through which the liquid of the suction chamber passes by gravity, a float actuated valve controlling said. opening and adapted to equalize the relative pressures of the suction chamber and distributing chamber and controlling the flow of fluid from the former to the latter, said valve consistin of a main valve member and a primary va ve seated therein, a float device and connections therewith for operating the valves.

6. In a device of the character described, a suction chamber, a distributingchamber, a source of liquid supply, a suction connec tion for the suction chamber located above the highest liquid level of said chamber, an atmospheric connection extend ng below the lowest level of the suction chamber, a valve-' opening between the suction chamber and distributing chamber through which the liquid contents of the former flows to the latter under gravity, float controlled means in the suction chamber for controlling admission of atmos heric air to said chamber as it is delivered y the atmospheric connection, said means also controlling the flow of liquid from the suction chamber to the distributing chamber, and said valve-opening and means providing the only atmospheric inlet to the suction chamber and the only out-let for the flow of liquid by gravity from said chamber to the distributing chamber.

7. In a device of the character described,

a suction chamber, a distribnting chamber,

float controlled means for controlling liquids passing from one of said chambers to the other, a source of liquid supplylfor the suction chamber, a suction connection for sand I chamber, and a'valve in said connection, a

valve seat below said valve co-operating with the valve to close the suction chamber, a valve seat above said valve provided with by-pass openings for maintainin normal suction in the suction chamber under abnormal condition of suction in the suction connection.

' 8. In a device of the character described, a suction-chamber, a distributing chamber, a source of fuel supply, a connection therefrom to the suction chamber, a suction connection for said chamber terminating in the manifold otan engine, a connection from the distributing chamber to the carburetor of an engine for supplying fuel thereto by gravity, anatmospheric inlet extending into the distributing chamber, a valve-opening extendirfgbetween the suction chamber and distributing chamber and forming the sole means for the admission of atmospheric air to the suction chamber and the flow of liquid to the distributing chamber by gravity, a valve mechanism controlling said opehin and comprising a main valve covering the valve-opening between the chambers and a primary valve seated in the main valve, said primary valve having a movement independent of the movement of the main valve, and float controlled means in the suction chamber connected with the primary valve and adapted to open and close said valve and its co-operating main valve dependent upon the rise and fall of liquid in the suction chamber.

9. In a device of the character described, a suction chamber having a suction connection with the intake pipe of an internal combustion engine, said connection terminating within the intake pipe and having a series of perforations arranged therein and subject to the action due to the inertia of the current of gases passing throu b said intake pipe whereby the suction e ect in themetion chamber is enhanced.

10. In a device of the character described, a suction chamber having a suction connec tion 'with the intake pipe of an internal combustion engine, said connection terminatin within the intake pipe and having a closed end and provider with a series of perforations arranged at one side of its axial center and adapted to be acted upon by the inertia of the current of gases passing over said perforated terminal as they are drawn through the intake pipe thereby enhancing the suction efiect in the suction chamber.

11. In a device of the character described, a suction chamber having a suction connection with the intake pipe of an internal combustion engine, said connection terminating in a hollow plug, said hollow plug pro ecting into and centrally across the intake pipe at right angles thereto, saidplug having a series of perforations at each side of a horizontal plane which is co-incident with the longitudinal axis of the plug, said perforations acted upon by the inertia of the cur- 'rent of gases passing through the intake pipe and past the transverse hollow plug membcr.

12. In a device of the character described, a suction chamber. a distributing chamber, said suction chamber close-l except for its connection with a source of suction and its connection with a source of liquid supply,

said distributing chamber being always open to atmospheric pressure, a valve-opening between the two chambers, a valve controlling said valve opening, a valve spindle loosely connected with said valve and having a valve seated in the first-named valve, and means within the suction chamber connected with said valve spindle for operating the valve dependent upon the rise and fall of level of fluid in the suction chamber, said valve controlling the How of liquid from the suction chamber to the distributing chamber and permitting the movement of air from the distributing chamber to the suction chamber simultaneously to reduce the suction in the suction chamber.

13. In a device of the character described, having a suction chamber and a distributing chamber and a valve opening between the two chambers, said suction chamber being closed except'for said valve-opening and a suction connection and a liquid supply connection, said distributing chamber being open to atmospheric pressure; of a valve for said valve-opening influenced by the suction of the suction chamber and the atmospheric pressure in its closing movement, an operating spindle for said valve extending through the valve-opening into the suction chamber, and means within said suction chamber connected with said valve s indle for operating the valve upon a preetermined rise and fall of level of fluid in the suction chamber, said valve controlling the flow of liquid from the suction chamber to the distributing chamber and controlling the reduction. of suction iii the suction chamber to permit said flow under gravity.

14. In a fuel feeding device having a suction chamber, a distributing chamber, a connection from the suction chamber to a source of suction, a connection from the suction chamber to a source of liquid supply, said distributing chamber open to atmospheric pressure; of a valve-opening between the two chambers, a primary valve and a secondary valve controlling said opening, valve connections for operating said valves ex tending tl'lrough the valve-opening, and means for actuating said connections upon the rise and fall of liquid in thesuction chamber for opening and closing said valves.

15. In a fuel feeding device having a suction chamber,

a distributing chamber, a

connection from the suction chamber to a source of suction, a connection from the suction chamber to a source of liquid sup ply, said distributing chamber open to atmospheric pressure; of a valve-opening between the two chambers, a valve controlling said opening, a float for operating said valve dependent upon a pre-determined rise and fall of level of liquid in the suction chamber, and means for retarding the action of said float during the rise and fall of the liquid level. i

16.. In a device of the character described, havinga suction chamber, a distributing chamber, a connection from the suction chamber to a source of suction, a connection having a suction chamber, a distributing chamber, means for controlling the flow of liquid from the, suction chamber to the distributing chamber, a connection from the suction chamber to a source of suction, a connection from said chamber to a source of liquid supply, a strainer tube extendinginto the suction chamber from the liquid supply connection, said strainer forming a guide for an automatic valve, and a buoyant automatic valve arranged in said strainer and adapted to close the liquid supply connection upon abnormal rise of level of liquid. in the suction chamber.

18. In combination with a main low level liquid supply tank, a liquid supply vrecep-.

tacle located in a plane above said tank and closed except as to connections hereinafter mentioned; a liquid supply connection from said tank to said receptacle; a supplemental chamber and connections from the receptacle to said chamber for discharge of liquid by gravity from the receptacle into the chamber; an exhaust connection to the receptacle for reducing the pressure therein below that of the atmosphere; an atmosphere inlet connection to the upper part of the supplemental chamber; a valve which controls the communication of the receptacle with the chamber, positioned so as to be assisted in opening by the gravity flow of the liquid from the receptacle into the chamber; a device in the receptacle which is operated in one direction by the accumulation of liquid in the receptacle and in the opposite direction by the withdrawal of liquid from the receptacle; operating connections from maintained said device to said valve for positively openingand closing it, the passage which connects the receptacle with the supplemental chamber being large for free and rapid discharge of the liquid from the receptacle into the chamber, whereby it is adapted also to permit themovement of air from the chamber into the receptacle simultaneously with the movement of liquid from the receptacle into the chamber.

19. In avacuum fuel feedingdevice, an op erating suction chamber having a connection for uniting it with a source of suction, a float located within the chamber and a compound valve controlled by the float, and comprising two valves, for controlling the pressure within the chamber, said valves having independent movements and simultaneous movements.

20. In a vacuum fuel feeding device, an operating chamber having a connection whereby it may be united with a suctioncreating device, for producing sub-atmospheric pressures -within the chamber, and a connection to. permit atmospheric pressure within the chamber, a float located within the chamber, aicompound, valve controlling the pressure in the chamber, actuated by the float, and consisting of two valves having independent movements and simultaneous movements. 21. In a vacuum' feeding device, an operating chamber having a connection whereby it may be united with a suction-creating device, for producing sub-atmospheric pressures therein, and having a connection with the outside atmosphere whereby atmospheric pressure may be .in the chamber, located within the chamber, and a compound valve controlled by, the float, and itself controlling the pressure in the chamber,

said valve having a main valveof comparatively large area and a second valve of comparatively small area.

22. In a',vacuum fuel feeding device, an operating "chamber having a connection whereby it may be united with suctioncreating means, a float located within the chamber and moved by of the fuel level therein, and a compound valve adapted to be operated by the float, for controlling the pressure within the chamher, said compound valve comprising two valves. one seating u on the other.

23. In a vacuum uel feeding device, an operating suction chamber having a connection whereby it may be united with suction-creating means, a float located within the chamber and moved by the rise and fall of the fuel level therein, and a compound valve operated by the float and controlling the pressure within the chamber, said compound valve comprising two relatively movable valves, one of them seating and opening movements of a float the rise and fall and unseating in advance of the seating and unseating of the other during the closin t, e compoun valve.

24;. In a vacuum fuel feeding device, an operating suction chamber havinga connection whereby it may be united with suction-creating means, a float located within the chamber andmoved by the rise and fall of fuel level therein, and a compound valve operated by the float and controlling the pressure within the chamber, said compound valve comprising two co-related valves, the primary valve and a secondary valve, ar-

ranged to move one in advance of the other.

25. In a vacuum fuel feedi. device, an operating suction chamber having a connection whereby it may be united with the suctioncreating means, a float located within the chamber, a compound valve controlled by the float and controlling the pressure within the suction chamber, said compound valve comprising two valves opening in the same direction and arranged to open successively on the same movement of the float.

Q,(i,, In a vacuu'mduel feeding-device, an operating suction chamber having a connection whereby it may be united with 811::- tion-creating means, a float located within the chamber,, a compound valve controlled by the float, and controlling the pressure within the suction chamber said compound valve comprising two va ves, alternately closed and opened in succession on the rise and fall of the float.

27. In a vacuum fuel feeding device an operating suction chamber having a connection whereby it may be united with suction-creating means, fioat located within the chamber, a compound valve controlled by the float for controlling the pressure within the suction chamber, said compound valve comprising two valves, one 00-0 1'' ating'with the'other and with the out for permitting movement of the compound Valve.

28. In a fuel feeding device having an operating chamber in which pressures are varied to cause fluid movements into and out of the same, and having a connection whereby it may be united with suctioncreating means, a compound valve con trolling the fhiiids in the said chamber and comprising two parts, one movable in advance of the other, and means'controlled by the level ol the fuel in the chamber for operating the valve.

29. In a vacuum fuel feeding device ha "11 a suction chamber into which liquid tiled is drawn, provided with a connectionwhergby it may be united with suction-creating means, a compound valve formed of two parts, which together control an opening one of the parts and into the suction chamber, being arranged to open before the other,

Ill

in a

means controlled by the level of the liquid prising a valve of small area arranged to 15 within the chamber for operating the valve. be primarily operated upon a certain change 30. In a vacuum fuel feeding device, a in the fuel level, and a second valve of suction chamber into which liquid fuel is larger area arranged to follow the movedrawn, provided with a connection whereby ment of the said primary valve.

it may be united with suction-creating i means, a compound valve arranged to con- JOSEPH trol an opening into the suction chamber, Vitnesses: and means controlled by the changing fuel M. E. ZIMMERER, 10 level for operating the valve, the valve com- C. P. HOLDERITH.

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