US752181A

US752181A - ronan

Info

Publication number: US752181A
Authority: US
Publication date: 1904-02-16
Anticipated expiration: 1921-02-16

Description

A. G. RONAN.

PATENTED FEB. 16, 1904.

RAW LIQUID FUEL MEASURERFOR EXPLOSIVEENGIN'ES;

APPLICATION FILED JULY 22, I902.

2T0 MODEL.

Patented February 16, 1904.

PATENT OFFICE.

ANSON GROVESv RONAN, OF TORONTO, CANADA. 7

RAW-LlQUlD-FUEL MEASURER FOR EXPLOSlVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 752,181, dated February 16, 1904.

Application filed July 22, 1902, Serial No, 116,559. (No model.)

To all whom, it may concern:

Be it known that I, Anson Gnovns RONAN, machinist, a subject of the King of Great Britain, residing at Toronto, in the county of York, Province of Ontario, Canada, have invented certain new and useful Improvements in Raw- Liquid-Fuel Measurers for Explosion-Engines, of which the following is a specification.

My invention relates to improvements in raw-liquid-fuel measurers; and the objects of my invention are, first, to combine with an explosion-chamber provided with the usual exhaust-port and igniter and constructed with a separate opening for air and a separate opening for fuel a raw-liquid-fuel-measuring device, (operated by the suction and compression strokes of the pistonhead,) by means of which a charge of fuel is measured and fed to the explosion-chamber during portion only of the suction-stroke, so that said charge may be vaporized and mixed with the air in said explosion-chamber during the rest of the suctionstroke and the whole of the compressionstroke, and, secondly, to design a simple and cheap device to supersede carbureters, mixers,

and vaporizers of all types; and it consists, essentially, of a conduit designed to be filled with liquid fuel, a valve stem held in said conduit, a valve-head on one end of said valvestem, and a valve-head on the other end of said valve-stem, the said conduit opening into said explosionchamber through said fuelopening and leading from a suitable source of fuel-supply, as hereinaftervmore particularly explained.

Figure l is a front elevation of my fuel.

measurer, and Fig. 2 is a rear elevation of same. Fig. 3 is a horizontal cross-section on the line a b, Fig. 1, showing the construction of my device. This figure also shows an explosion-chamber provided with two distinct passage-ways, one for the fuel (to which the measurer is connected) and another for the air. This figure further shows any suitable fuelreservoir for the measurer. Fig. & is a horizontal cross-section through an alternative form of my measurer.

In the drawings like letters of reference indicate corresponding parts in each figure.

The body A, together with the cups B and B screwing into said body on each side of same, forms what I call the casing of the fuel-measurer. that the body A is so constructed as to receive the said cups, and as the said cups are hollow thus provide two chambers C and D within said casing. E is a passage-way within the ,body A, connecting the said chambers together. Within this passage-way E and having longitudinal movement therein is held a valve F, a valve-head G of which is held upon a seat H- by a spring I, held between said It will be seen from Fig. 3

valve-head and the cup B, In order to se- .curely hold the spring Iin position and alineinent with the longitudinal axis of a valve F, I provide a pocket J, (shown by dotted lines in valve-head G,) in which one end of this spring is held, and a hollow screw K, screwing from the outside into the cup B,'which contains the other end of the spring. By means of the screw K it will be seen that I can easily adjust the tension of the spring I against the valve F. In order to protect the screw K, I incase same within a housing L, constructed with a chamber M, which will be of suflicient height as not to abut the head of the screw K when said housing is screwed home.- I

On the shank N of the valve F is screwed a valve-head O. In order to operate this valvehead so as to regulatev distance of movement of same from its seat P, (thus regulating the .quantity of fuel required for a charge to correspond to the horse-power of the engine,) I provide the following means, but vwish to be distinctlyunderstood that I do not confine myself to these means: In valve-head O, I construct a slot q, in which operates'a lug R, se-

cured toorforming part of the flared head S of the pin T, (shown dotted.) This head has movement upon the correspondingly-shaped seat U, formed on the inner side of the cup Keyed in any suitable way to the pin T is an arm V, by means of which the said pin is revolved, thus moving the valve-head O to or from its seat. In order to'keep the head S tight upon its seat, I tightly screw between the arm V and the cup B? on the pin T a nut W against said cup, and on the outer end of said pin T, I'screw a nut X tightly against said arm. This is of course a very common means of locking a valve-head against a seat, so that no matter in which direction same may be turned it will not be loosened therefrom.

Valve F is constructed in any suitable manner to provide free flow of fuel when not seated through the passage-WayE from chamber D to chamber C. In the drawings I have shown a series of grooves Y, constructed in said valve for this purpose.

8 is a duct leading from the chamber 0 to communicate with the passage-way in the conduit 9, which leads to the explosion-chamber 10. The conduit 9 is connected to the trunnion 11 by any'suitable union-coupling 12. Although I have shown the conduit 9 as opening into the explosion-chamber in a reduced end, I find this is immaterial. I may make the discharge end of said conduit of the same diameter as the rest of the conduit.

.13 is the opening through which the fuel is introduced into the explosion-

chamber

10, and 14 the opening through which the air is introduced into said explosion-chamber by means of any suitable induction-valve 15 held therein. I do not confine myself to any particular construction of explosionchamber,except that same must be provided with two separate passage-ways, one for the air and the other for the fuel.

25 is any suitable igniter situated within the explosion-chamber 10. I preferably use an electric igniter.

I shall now describe the operation of my device: The ducts and chambers within the measurer and the conduits leading to and from same are filled with the fuel. We will consider that the measurer and conduits connected therewith are filled and the measurer ready for operation. During the outward movement of the piston-head 16 the pressure within the explosion-chamber 10 is gradually reduced until it is below that of the atmosphere. Consequently the back pressure (if any) against the fuel contained in the conduit 9, duct 8, and chamber G is greatly below that of the atmospheric pressure against the fuel in the grooves Y, chamber D, duct 6, conduit 2, (connected to the said duct by any suitable union-coupling 5 screwing over the trunnion 41,) and reservoir 3, into which said conduit opens. Therefore it will be understood that the valve-head G will be moved off its seat H, thus permitting the charge of fuel from the conduit 9 to be fed into the explosion-chamber 10. Simultaneously with this operation the induction-valve 15 is operated so as to permit air to pass into said explosion -chamber. Immediately the piston starts to move inwardly the pressure within the explosion-chamber closes the induction-valve 15, and as the end of the conduit 9 opens directly into said explosionchamber the pressure against fuel in same acts through the passage-ways or ducts before described and forces the valve-head G down onto its seat H. The spring I of course assists this movement of said valve. As the valve F in the preferred form is provided with two valve-heads, it will be understood that when the valve-head G is being moved away from its seat, as described, the valve-head O is being moved toward its seat R at the same rate of speed and that as soon as the valve-head 0 seats the passage-way E between the two chambers D and C is closed. This operation prevents the introduction into the explosionchamber of more fuel than is required, thus always insuring the proper quantity of fuel being delivered thereinto. It will of course be understood that this operation will take place each time energy has to be developed within the explosion-chamber. When the piston-head 16 compresses the charge within the explosion-chamber, it will be understood that the closing of the valve-head G down upon its seat prevents the raw liquid fuel from being forced out of the measurer. It will be seen from this that the valve F is really a checkvalve.

By means of a key 18, secured in the body A, operating in a slot 19 in the side of the valve-head G, the valve F is prevented from axial movement.

In order to know the distance the valve-head O is moved to or from its seat to regulate the charge of fuel, I provide the cup B with a dial B provided with suitable marks thereon with which the pointer V, secured to or forming part'of the arm V, must be made to register. To decrease the charge of fuel into the chamber C, the arm V must be moved in the direction indicated by arrow, and to increase chargethe arm V must of course be moved in opposite direction.

In order to make chambers C and D perfectly tight, I provide annular flanges 0 and d in same, respectively, around which I place any suitable packing 7, as shown. These said chambers can of course be made tight in any suitable manner, andI do not confine myself to the construction just described. As will be seen, the cups B are jammed against the packing 7 and fit around the outer side of the. annular flanges 0 and d.

The alternative form of my fuel-measurer (shown in Fig. 4) is provided with the ducts 6 and 8 and is connected in any suitable manner to a reservoir and an explosion-chamber, as will be understood. The cups-B -and B are provided with the chambers D and G,which are connected together by the passage-way E. The cup B in this form is provided with a hollow extension 20, fitting within the passage-way E. Within this extension operates the valve F, which controls the passage of fuel from the chamber D to the chamber 0. The modified form of valveis provided for the major portion of its length with a central passage-way F, which communicates with the annular groove F of said valve by means of a series of small passage-ways F. F 4 is a valvehead. and F seat for same. On the stem F of the valve is held a spring F which also rests within the cup F of the regulating-spindle F, which is held in the stufiing-box F, with which the cup B is provided. By moving in or out the said regulating-spindle the tension of the spring F against the valve F is regulated. When the pressure moves the valve F so as to admit fuel from the chamber D to the chamber C, the stem F abuts the end of the cup F and the valve thus limited in its outward movement. It will be understood from this that the distance of movement of the valve-head F* from its seat is regulated by moving either out or in the regulating-spindle F in order to increase or decrease the charges. The cup B is made leak-proof in any suitable manner. Communicating with the duct 6 is an annular groove 21, over which a washer 22 (made of any suitable material) is suitably held in place, in which are a series of holes :23, bymeans of which fuel is conveyed from annular groove 21 to annular groove 24, made in inner end of cup B The annular groove 24: communicates with the chamber D by means of the duct 25. The cup B is screwed tightly against the washer 22, as shown.

The operation of both forms of my fuelmeasurer is the same. The direction of the flow of fuel is shown by arrows.

It will of course be understood that I may I use a water-jacket round my explosion-chamher without departing from the spirit of my invention.

During the whole of the suction-stroke of the piston-head the alternative form of my invention (shown in Fig. 4:) will enable the piston-head to draw in the liquid fuel. The measurer and its conduits will be made of sufficient size so as to permit only the required amount for a charge of raw gasolene to be sucked into the explosion-chamber. This will prevent the admission of too much fuel thereinto. In the preferred form (shown in Fig. 3) the measurer will permit the piston-head to suck into the explosion-chamber the required amount for a charge of raw gasolene only during portion of the suction-stroke of same, thus permitting the fed gasolene to be vaporized and mixed with air during the balance of the suction-stroke and the whole of the compression-stroke. The alternative form (shown in Fig. 4) does not permit of as thorough mixing of the air and gasolene; but yet I get most excellent results from same. I

p I do not confine myself to using an adjustable valve, but preferably use one.

I have minutely described and shown the construction and parts of my preferred form, together with a modification of same, of my fuel-measurer; but it must be distinctly understood that I do not confine myself to any parperform the same function in the same manner that mine does.

Although I preferably use a spring, I may dispense with one in connection with the valve F when same is used in a vertical position.

What I claim as my invention is- 1.' The combination with the explosionchamber, of a gas-engine, provided with adistinct air passage way, and a distinct fuelopening, and piston-head operating in said explosion-chamber. of a raw-liquid-fuel-measuring device comprising a conduit designed-to be filled with liquid fuel and connected to said explosion-chamber by means of its fuel-opening; a a valve stem held in said conduit; a valve-head on one end of said valve stem, and a valve head on the other end of said valve-stem; the said valve stem and valveheads being operated by a portion of the suction-stroke of said piston-head to permit same to draw a chargeof raw liquid fuel into said explosion-chamber, one of said valve-heads automatically cutting off the further supply of liquid fuel into said explosion-chamber notwithstanding the continued suction-stroke of said piston-head, and the other valve-head being operated by the compression stroke of said piston-head to prevent the pressure within the explosion-chamber from forcing the raw liquid fuel out of said conduit.

2. The. combination with the explosionchamber, of a gas-engine, provided with a distinct air passage way, and a distinct fuelopening, and piston-head operating in said explosion-chamber, of a rawliquid-fuel-meas uring device comprising a conduit designed to be filled with liquid fuel and connected to said explosion-chamber by means of its fuel-opening; a valve-stem held in said conduit; a valvehead on one end of said valve-stem, and a valvehead on the other end of said valve-stem, the said valve-stem and valve-heads being operated by a portion of the suction-stroke ofsaid piston-head to permit same to draw a charge of raw liquid fuel into said explosion-chamber, one of said valve-heads automatically cutting off the further supply of liquid fuel into said explosion-chamber notwithstanding the continued suction-stroke of said piston-head, andthe other valve-head being operated by the compression stroke of said piston-head to prevent the pressure within the explosion-chamber from forcing the raw liquid fuel out of said conduit, and a spring combined with said valve-stem.

3. The combination with the explosionchamber, of a gas-engine, provided with a distinct air passage-way, and a distinct fuel-opening, and piston-head operating in said explosion-chamber, of a raw-liquid-fuel-measuring device comprising a conduit designed to be filled with liquid fuel and connected to said explosion-chamber by means of its fuel-opening; a valve-stem held in said conduit; an ad- 5 ticular construction of fuel-measurer that will t justable valve-head on one end of said valvestem; a-valve-head on the other end of said valve-stem, the said valve-stern and valveheads being operated by a portion of the suction-stroke of said piston-head to permit same to draw a charge of raw liquid fuel into said explosion-chamber, one of said valve-heads automatically cutting off the further supply of liquid fuel into said explosion-cl1amber notwithstanding the continued suction-stroke of said piston-head, and the other valve-head being operated by the compression-stroke of said piston-head to prevent the pressure within the explosion-chamber from forcing the raw liquid fuel out of said conduit.

4. The combination with the explosionchamber of a gas-engine, provided with adistinct air passage-way, and a distinct fuel-opening, and piston-head operating in said explosion-chamber, of a raw-liquid-fuel-measuring device comprising a conduit designed to be filled with liquid fuel and connected to said explosion-chamber by means of its fuel-opening; a valve-stem held in said conduit; an adjustable valve-head on one end of said valve-stem, and a valve-head on the other end of said valve-stem, the said valve-stem and valve-heads being operated by a portion of the suction-stroke of said piston-head to permit same to draw a charge of raw liquid fuel into said explosion chamber, one of said valve-heads automatically cutting Off the further supply of liquid fuel into said explosionchamber notwithstanding the continued suction-stroke of said piston-head, and the other valve-head being operated by the compression-stroke of said piston-head to prevent the pressure within the explosion-chamber from forcing the raw liquid fuel out of said conduit, and a spring combined with said valvestem.

5. The combination with the explosionchamber of a gas-engine provided with a distinct air passage-way, and a distinct fuel-opening and piston-head operating in said explosion-chamber, of a fu'el-measurer comprising a casing provided with a central passage-way and two ducts, two cups each screwing into a side of said casing thus forming two chambers which are connected together by said central passage-Way, the said ducts opening into said chambers; a valve-stem held in said central passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valve-stem operating in one of said chambers; a valve-head on the other end of said valvestem operating in said other chamber, the said valve-stem being operated by a portion of the suction-stroke of said piston-head so as to permit said piston-head to draw a charge of raw liquid fuel into said explosion-chamber, one of said valve-heads automatically cutting off the further supply of liquid fuel into said explosion-chamber notwithstanding the continued suction-stroke of said piston-head; the

said valve-stem being operated by the compression-stroke of said piston-head so as to seat said other valve-head to prevent the pressure within the explosion-chamber from forcing the raw liquid fuel out of said casing, a spring combined with said valve-stem, and the fuel-reservoir open to the pressure of the atmosphere.

6. The combination with the explosionchamber of a gas-engine provided with a distinct air passage-w ay and a distinct fuel-opening, and piston-head operating in said explosion-chamber, of a fuel-measurer comprising a casing provided with a central passage-way and two ducts, two cups each screwing into a side of said casing thus forming two chambers which are connected together by said central passage-way, the said ducts opening into said chambers; a valve-stem held in said central passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valvestem operating in one of said chambers; an adjustable valve-head on the other end of said valve-stem operating in said other chamber, the said valve-stem being operated by a por tion of the suction-stroke of said piston-head so as to permit said piston-head to draw a charge of raw liquid fuel into said explosionchamber, one of said valve-heads automatically cutting ofi" the'further supply of liquid fuel into said explosion chamber notwithstanding the continued suction-stroke of said piston-head; the said valve-stem being operated by the compression-stroke of said pistonhead so as to seat said other valve-head to prevent thc pressure within the explosionchamber from forcing the raw liquid fuel out of said casing, a spring combined with said valve-stem, and the fuel-reservoir open to the pressure of the atmosphere.

7 The combination with the explosionchamber of a gas-engine provided with a distinct air passage-way, and a distinct fuel-opening, and piston-head operating in said explosion-chamber, of a fuel-measurer comprising a casing provided with a central passage-way and two ducts, two cups each screwing into a side of said casing thus forming two chambers which are connected together by said central passage-way, the said ducts opening into said chambers; a valve-stem held in said central passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valvestem operating in one of said chambers; an adjustable valve-head on the other end of said valve-stem operating in said other chamber, the said valve-stem being operated by a portion of the suction-stroke of said piston-head so as to permit said piston-head to draw a charge of raw liquid fuel into said explosionchamber, one of said valve-heads automatically cutting off the further supply of liquid fuel into said explosion chamber notwith- ICC standing the continued suction=stroke of said piston-head; the said valve-stem being operated by the compression-stroke of said pistonhead so as to seat said other valve-head to prevent the pressure within the explosioncharnber from forcing the raw liquid fuel out of said casing; a spring combined with said valve-stem; a key secured in said casing and held so as to permit only longitudinal movement of said valve-stem and the fuel-reservoir open to the pressure of the atmosphere.

8. The combination. with the explosionchamber of a gas-engine provided with a distinct air passage-way, and adistinct fuel-opening, and piston-head operating in said explosion-chamber, of a fuel-measurer comprising a-casing provided with a central passage-way and two ducts, two cups each screwing into a side of said casing thus forming two chambers which are connected together by said central passage-way, the said ducts opening into said chambers; a valve stem held in said central passage-way and constructed so as to permit flow of fuel from one chamber to another; a fixed valve-head, provided with a pocket, on one end of said valve-stem, operating in one of said chambers; an ad- 1 justable valve-head on the other end of said valve-stem operating in said other chamber, the said valve-stem being operated by a portion of the suction-stroke of said piston-head so as to permit said piston-head. to draw a charge of raw liquid fuel into said explosionchamber, one of said valve-heads automatically cutting off the further supply of liquid fuel into said explosion chamber notwithstanding the continued su'ction-stroke of said piston-head; the said valve-stem being operated by the compression-stroke of said pistonhead so as to seat said other valve-head to prevent the pressure within the explosion chamber from forcing the raw liquid fuel out of said casing; a hollow screw held in one side of said casing in line with said valve-stem; a spring supported in said hollow screw and in the pocket in said fixed valve-head; a key secured in said casing and held so as to permit only longitudinal movement of said valvestem; a pinheld in one side of said casing and being associated with said adjustable valve-head so as to move same; a pointer secured to the outer end of said pin and being intended to indicate, by means of any suitable dial, with which said casing is provided, the distance of movement of said adjustable valvehead, and the fuel-reservoir open to the pressure of the atmosphere.

9. The combination with the explosion: chamber of a gas-engine provided with a distinct air passage-way, and a distinct fuel-opening, and piston-head operating in said explosion-chamber, of a fuel-measurer comprising a casing provided with two duct-provided chambers connected together by a passageway; a valvestern, held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valve-stem operating in one of said chambers; a valve-head on the other end of,said valve-stem operating in said other chamber, the said valve-stem being perated by a portion of the suction-stroke of said piston-head so as to permit said pistonhead to draw a charge of raw liquid fuel into said explosion-chamber, one of said valveheads automatically cutting off the further supply of liquid fuel into said explosion-chamber notwithstanding the continued suction' stroke of said piston-head; the said valve-stem being operated by the compression-stroke of said piston-head so as to seat said other valvehead to prevent the pressure within the explosion-chamber from forcing the raw liquid fuel out of said casing; a spring combined with said valve-stem, and the fuel-reservoir open to the pressure of the atmosphere.

10. The combination with the explosionchamber of a gas-engine provided with a distinct air passage-way, and a distinct fuel-opening, and piston-head operating in said explosion-chamber, of a fuel-measurer comprising a casing provided with two duct-provided chambers connected together by a passageway; a valve-stein, held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valve-stem operating in one of said chambers; an adjustable valvehead on the other end of said valve-stem operating in said other chamber, the said valvestem being operated by a portion of the suction-stroke of said piston-head so asto permit said piston-head to draw a charge of liquid fuel into said explosion-chamber, one of said valve-heads automatically cutting olf the further supply of liquid fuel into said explosionchamber notwithstanding the continued suction-stroke of said piston-head; the said valvestem being operated by the compression-stroke of said piston-head so as to seat said other valve-head to prevent the pressure within the explosion-chamber from forcing the raw liquid fuel out of said casing; a spring combined with said valve-stem, and the fuel-reservoir open to the pressure of the atmosphere.

11. The combination with the explosionchamber of a gas-engine provided with a distinct air passage-way, and a distinct fuelopen ing, and piston-head operating in said explosion-chamber, of a fuel-measurer comprising a casing provided with two duct-provided chambers connected together by a passageway; a valve-stem, held in said passage-way and constructed so as to permit flow of fuel from onechamber to another; a valve-head on one end of said valve-stem operating in one of said chambers; an adjustable valvehead on the other end of said valve-stem op erating in said other chamber, the said valvestem being operated by a portion of the suction-stroke of said piston-head so as to permit said piston-head to draw a charge of raw liquid fuel into said explosion-chamber, one of said valve-heads automatically cutting off the further supply of liquid fuel into said explosionchamber notwithstanding the continued suction-stroke of said piston-head; the said valvestem being operated by the compression-stroke of said piston-head so as to seat said other valve-head to prevent the pressure within the explosion-chamber from forcing the raw liquid fuel out of said casing; a spring combined with said valve-stem; a key secured in said casing and held so as to permit only longitudinal movement of said valve-stem, and the fuel-reservoir open to the pressure of the atmosphere.

12. The combination with the explosionchamber of a gas-engine provided with a distinct air passage-Way, and a distinct fuel-opening, and piston-head operating in said explosion-chamber, of afuel-measurer comprising a casing provided with two duct-provided chambers connected together by a passage-way; a valve-stem, constructed so as to permit flow of fuel from one chamber to another, provided with a threaded end, operating in said passageway; a fixed valve-head on one end of said valve-stem,operating in one of said chambers, a key secured in said casing and combined with said valve-stem to permit only longitudinal movement of same; an adjustable valve-head, on the threaded end of said valve-stem, operating in said other chamber, said valve-stem being operated by a portion of the suctionstroke of said piston-head so as to permit said piston-head to draw a charge of raw liquid fuel into said explosion-chamber, one of said valve-heads automatically cutting off the further supply of liquid fuel into said explosionchamber notwithstanding the continued suction-stroke of said piston-head; the said valvestem being operated by the compression-stroke of said piston-head so as to seat said other valve-head to prevent the pressure within the explosion-chamber from forcing the raw liq- Y uid fuel out of said casing; a spring combined with said valve-stem; a pin held in one side of said casing and being associated with said adjustable valve-head so as to move same; a pointer secured to the outer end of said pin and being intended to indicate, by means of any suitable dial, with which said casing is provided, the distance of movement of said adjustable valve-head, and the fuel-reservoir open to the pressure of the atmosphere.

13. A raw-liquid-fuel-measuring device comprising a conduit designed to be filled with liquid fuel; a valve-stem held in said conduit; a valve-head on one end of said valve-stem, and a valve-head on the other end of said valve-stem, said liquid fuel being subjected to different pressures to operate said valve-stem and valve-heads to control passage of said liquid through said conduit.

14. A raw-liquid-fuel -measuring device comprising a conduit designed to be filled with liquid fuel; a valve-stem held in said conduit; a valve-head on one end of said valve-stem, and a valve head on the other end of said valve-stem, said liquid fuel being subjected'to different pressures to operate said valve-stem and valve-heads to control passage of said liquid through said conduit, and a spring combined with said valve-stem.

15. A raw-liquid-fuelmeasuririg device comprising a conduit designed to be filled with an adjustable valve-head on one end of said valve-stem, and a valve-head on the other end of said valve-stem, said liquid fuel being subvalve-stem and valve-heads to control passage of said liquid through said conduit.

16. A raw liquid fuel measuring device comprising a conduit designed to be filled with liquid fuel; avalve-stem held in said conduit;

valve-stern, and avalve-head on the other end jected to different pressures to operate said valve-stem and valve-heads to control passage of said liquid through said conduit, and a spring combined with said valve-stem.

17. A raw liquid fuel measuring device comprising a casing provided with two chambers connected together by a passage-way; a valve-stem held in said passage-way; a valvehead on one end of said valve-stem operating in one of said chambers; a valve-head on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures'to-operate said valve-heads to control passage of said fuel through said casing.

18. A raw liquid-fuel-measuring device comprising a casing provided with two chambers connected together by a passage-way; a valve-stem: held in said passage-way; a valvehead on one end of said valve-stem operating other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said fuel through said casing, and a spring combined with said valve-stem.

19. A rawliquid-fuehmeasuring device comprising a casing provided with two ductprovided chambers connected together by a passage-way; a valve-stem, held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valvehead on one end of said valve-stem operating in one of said'chambers; a valve-head on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said liquid through said casing.

jected to different pressures to operate said of said valve-stem, said liquid fuel being sub-' in one of said chambers; a valve-head on the liquid fuel; a valve stem held in said conduit;

an adjustable valve-head on one end of said 20. A raw-liquid-fuel-measuring device comprising a casing provided with two ductprovided chambers connected together by a passage-way; a valve-stem, held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; avalvehead on one end of said valve-stem operating in one of said chambers; a valve-head on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said liquid through said casing, and a spring combined with said valve-stem.

21. A raw liquid fuel measuring device comprising a casing provided with two ductprovided chambers connected together by a passage-way; a valve-stem, held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valvehead on one end of said valve-stem operating in one of said chambers; an adjustable valvehead on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said liquid through'said casing, and a spring combined with said valve-stem.

22. A raw liquid fuel measuring device comprising a casing provided with two ductprovided chambers connected together by a passage-way; a valve-stem, held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valvehead on one end of said valve-stem operating in one of said chambers; an adjustable valvehead on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said liquid through said casing; a spring combined with said valve-stem; and a key secured in said casing and held so as to only permit longitudinal movement of said valve-stem.

23. A raw liquid-fuelmeasuring device comprising a casing provided with two ductprovided chambers connected together by a passage-way; a valve-stem, held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valvehcad on one end of said valve-stem operating in one of said chambers; an adjustable valvehead on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said liquid fuel through said casing; a spring combined with said valve-stem; a key secured in said casing and held so as to only permit longitudinal movement of saidvalve-stem; a pin held in one side of said casing and being associated with said adjustable valve-head so as to move same, and a pointer secured to the outer end of said pin being intended to indicate, by means of any suitable dial, with which said casing is provided, the distance of movement of said adjustable valve-head.

24. A raw-liquid-fuelmeasuring device comprising a casing provided with a central passage-way and'two ducts; two cups, each screwing in to a side of said casing thus forming two chambers which are connected together by said central passage-way, the said ducts opening into said chambers; a valvestem held in said central passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valve-stem operating in one of said chambers; a valve-head on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said fuel through said casing, and a spring combined with said valvestem. 7

25. A rawliquid-fuel-measuring device comprising a casing provided with a central passage-way and two ducts; two cups, each screwing into a side of said casing thus forming two chambers which are connected together by said central passage-way, the said ducts opening into said chambers; a valvestem held in said central passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valve-stem operating in one of said chambers; an adjustable valve-head on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said fuel through said casing, and a spring combined with valve-stem.

26. A raw liquid fuel measuring device comprising a casing provided with a central passage-way and two ducts; two cups, each screwing into a side of said casing thus forming two chambers which are connected together by said central passage-way, the said ducts opening into said chambers; a valvestem held in said central passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valve-stem operating in one of said chambers; an adjustable valve-head on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said fuel through said casing; a key secured in said casing and held so as to permit only longitudinal movement of said valve-stem, and a spring combined with said valve-stem.

27. A raw-liquid fuel measuring device comprising a casing provided with a central passage-way and two ducts; two cups, each screwing into a side of said casing thus forming two chambers which are connected together by said central passage-way, the said ducts opening into said chambers; a valve-stem held in said central passage-Way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valve-stem operating in one of said chambers; an adjustable valve-head on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valveheads to control passage of said fuel through said casing; a key secured in said casing and held so as to permit only longitudinal movement of said valve-stem; a spring combined with said valve-stem; a pin held in one side of said casing and being associated with said adjustable valve-head so as to move same, and a pointer secured to the outer end of said pin and being intended to indicate, by means of any suitable dial, with which said casing is provided, the distance of movement of said adjustable valve-head.

28. The combination with acasing provided with two duct-provided chambers connected together by a passage-way; of a valve-stem held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valvestem operating in one of said chambers; a

valve-head on the other end of said valve-stem operating in said other chamber; the said valve-heads being seated alternately by the varying pressure of the liquid Within said casing to control passage of said liquid through said chambers and ducts, and a spring combined with said valve-stem.

29. The combination with a casing provided with two duct-provided chambers connected together by a passage-Way, of a valve-stem held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valvestem operating in one of said chambers; an adjustable valve-head on the other end of said valve-stem operating in said other chamber; the said valve-heads being seated alternately by the varying pressure of the liquid within said casing to control passage of said liquid through said chambers and ducts, and a spring combined with said valve-stem.

30. The combination with a casing provided with two duct-provided chambers connected together by a passage-way; of a valve-stem held in said passage-way and constructed so as to permit flow of fuel from one chamber to another; a valve-head on one end of said valvestem operating in one of said chambers; an adjustable Valve-head on the other end of said valve-stem operating in said other chamber; the said valve-heads being seated alternately by the varying pressure of the liquid within said casing to control passage of said liquid through said chambers and ducts; a spring combined with said valve-stem; a key combined with said valve-stem so as to permit only longitudinal movement of same, and means for adjusting said adjustable valve-head.

31. A raw-liquid-fuelmeasuring device comprising a casing provided with a central passage-way and two ducts; two cups, each screwing into a side of said casing thus forming two chambers which are connected together by said central passage-way, the said ducts opening into said chambers; a valvestem held in said central passage-way and constructed so as to permit flow of fuel from one chamber to another; a valvehead on one end of said valve-stem operating in one of said chambers; an adjustable valve-head on the other end of said valve-stem operating in said other chamber, the said liquid fuel being subjected to different pressures to operate said valve-heads to control passage of said fuel through said casing; a hollow screw held in one side of said casing in line with said valve-.

stem; a spring supported in said hollow screw and in the pocket in said fixed valve-head; a key secured in said casing and held so as to permit only longitudinal movement of said valve-stem; a pin held in one side of said casing and being associated with said adjustable valve-head so as to move same, and a pointer secured to the outer end of said pin and beingintended to indicate, by means of any suitable dial, with which said casing is provided, the distance of movement of said adjustable valvehead.

' In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ANSON GROVES RONAN. Vitnesses:

W. H. SMITH, EGERTON R. CASE.