US1011931A - Force-feed carbureter. - Google Patents

Description

C. W. FARQUHARSON.

PRGB FEED CARBURETER.

APPLIQATION rILBD 00T.13,191o. RENEWED Nov.8,1911,

G. W. FARQUHARSON.

FORGE FEED GARBURETER.

APPLICATION FILED 0UT.13,1910 RENEWED Nov. s, 1911.

Patented Dec. 19, 1911.

2 SHEETSSHBET 2 @witnesses M 9i/bj CHARLES W. FAMUHABSOH, 01? CHICAGO, ILLINOIS.

TOME-FEED GABBUBETEB.

Indication of Let-tern Patent.

Patented Dec. 19, 1911.

Application illed october 18, 1910, Serial llo. 586,924. Renewed November B, 1911. Serial Io. 669,247.

To all whom it ma/y ummm:

Be it knownthat I CHAnms W. Fn- QUHAnsoN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Force- Feed Carbureters; and I do declare the following to be a full, clear, and exact descri tion of the invention, such as will enab e others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in force feed carbureters.

One object of the Ainvention is to provide a force feed carburetor having an improved construction of pump, the parts of which operate without friction and are consequently not subjected to material wear.

Another object is to rovide a carburetor of this characterwhic will be comparativel simple in construction, eilicient and relia le in operation and which may be connected with and operated by any explosive engine.

With the foregoing and other objects in view, the invention consists of certain novel 'features of construction, combination and arrangement of parts as will be more fully descri ed and particularly pointed out in the ap ended claims.,

In t e accompanying drawings: Figure 1 is a vertical lon 'tudinal section of a carbureter constructs in accordance with the invention; Fig. 2 is a side view of a portion of the same; Fig. 3 is a vertical cross section on the line 3--3 of Fig. 1; Fig. 4 is a similar view on the line 4-4 of Fig.- 1.

Referring more particularly to the drawings, 1 denotes the charge tube of the engine, said tube having a flared upwardly projectin end 2 in which is arranged concaved de ecting plates 3 and 4. The plates 3 and 4 are spaced a suitable distance apart and in the upper portion of the plate 3 is formed a series of perforations 5, while in the center or bottom of the plate 4 is formed an opening 6. The u per edga of the flared u p er end of the c arge tu provided wit an inwardly projecting annular flange 7 to which is secured the anged upper edges of the lates 3 and 4, said parte bein secured y screws or similar astenin evices.

The ared upper end 2 of the charge tube and the plates 3 and 4 form the lower portion of a carburetor. The upper portion 'charge tube 1 is a pump ormixing chambsertf tlhe carburetor com prises a casi e ower o end o which is rolil'igded with an outgvnrdly and downwar y projecting radial flange 9 which fits over and is secured to the flanged edge of the upper portion 2 of the charge tube 1 by the same fastening screws which secure the dates 3 and 4 thereto. The upr end o the casing 8 is contracted and as formed therein an air inlet opening or mouth 9 which is provided with a cover 10 wherebnthe same may be closed when desired. o the casing 8 is arranged a transyersely dis osed oil conducting ipe 11 having form thereon an upwa y projectmg branch discharge pi 12 in the upper end of which is arran edea valve casi 13 provided with a chec valve 14 whic is adapted to open under rassure to permit the fuel to be discharge from the ipe 12 and into the connecting chamber of t e carbureter.

The oil or fuel when discharged through the valve falls onto a cone sha ed deilectin plate 15 which .is secured to t e upper en of the branch lpipe 12 and has its outer edge curved upwa l to provide a gutter 16 in which is form a series of oil discharging passages 17. The outer edge of the plate 15` is in close engagement with the inner wall of the casing 8 so that said plate practically forms a partition in said casing. Connected with `the outer end of the oil conductmg pipe 11 is a valve casing 18 in which is arranged a check valve '19. With the valve casing 18 is connected the adjacent end of a fuel conducting tube 20 which leads to and is connected with the fuel supply tank (not shown).

Connected to the casing 8 and to the supporting frame 21 in which is arrange my. improved fuel pum `22. The pump 22 is formed in two mem rs 23 and 24 each of which consists of a series of hollow annular sections, said sections being formed from pairs of thin metal disks 25 provided with centrally disposed circular fpassages. The outer ed es of each pair o disks 25 are connected y annular rings or bands '26, while the disks of adjapenl sections arie1 conneted at lthe edges o t e openings erein y coup ing rings 27. The outer disk of the outer section of thev member 23 of the pump is connested around the edge of the opening therein to a tubular exteriorly threaded couiid pling 2B which has a screw threaded engage- 'ment with a bushing 29 arranged in the adjacent end of the pum supporting frame 21. The cou ling mem r 28 is connected in any suitable manner to a pipe 30 whlch connects with the exhaust port of the engine. The outer disk of the inner sectlon of the pump member 23 is secured to a sectional connecting rod 31 hereinafter more full described.

e member 24 of the pump is constructed in the same manner as the member 23 and the outer disk of the outer section of-said member is connected to the fuel conducting pipe 11 by a tubular couplin 32. The outer disk of the inner section o the member 24 is connected to the o posite end of the sectional connecting ro 31, said rod thus operatively connecting the two members 23 and 24 of the pump together:

The connecting rod 31 is formed 1n two sections the inner end of one of which is provided with a reduced threaded extension 33, while the inner end of the opposlte section is formed with a threaded socket 34 in which is screwed the reduced threaded end 33 of the first mentioned section thus detachably connectin rod together. On t e rod, adjacent the ump member 25, is formed an annular stop an 35 the urpose of which will be hereina ter descri d. The connectlng rod 31 is loosely engaged with and is adapted to slide through an exteriorly threaded bushing 36 which is adjustably mounted in a threaded aperture in the lower end of a supporting arm or bracket 37 formed on the pump supporting frame 21 as shown.

Formed on the end of the bushing 36 remote from the flange 35 on the connecting rod 31, is an annular flan 38and between the flange 38 and the brac et 37 is clam ed a bushing adusting collar 39, said colar having'forme on one side a laterall projecting lever 40 which is connected y an operating rod 41 to the laterally projecting stem 42 of a charge regulating va ve 43 a r ranged in the char supply pipe 1, sald stern 42 being provi ed w1 44 Yto which the lower end of the operating rod 42 is connected in an suitable manner.

As hereinbefore state the pump 22 is connected to the exhaust of the engine so that when the latter exhausts it exerts a pressure in the engi or member 23 of the pump. As the di s 25 are of very thm material, they spread apart under the pressure at their inner ends and this action pushes the connecting rod 31 through the coupling and thereby closes the other member 24 of the ump by forci the inner edges of the dislgs thereof towar each other. The connecting rod 31 serves as a piston and the members 23-24 constitute flexible connectins between the same and the fixed said sections of the.

a crank handleA tubular supports 28 and 32 respectively. The exhaust from the en ine exerts a pressure against the end of t e rod 31 appearing at the left in Fig. 1 and the rod or piston is thereby ushed to the right through the sleeve 36. e inner edges of the member 24 yield to this movement of the piston 31 and an increased back pressure is. applied through the lipe 11 upon the inwardly opening check va ve 19 so as to close said valve and open outwardly opening check valve 14, thereby forcing a charge of fuel out of the pipe 12 to the casing 15, whence it passes throutgrl the perforations 16 mixi with the air a itted through th'e air intlallre 9 and being dashed against the deiecting lates 4 and 3 the charge passes through t e dischargp perforations 5 in the latter, by means of w ich it is split or broken up into fine' particles, thus causing a thorou h mixing of the gasolene and the air whic enters the charge tube 1 and is conducted thereby to the engine. Between the exhausts of the `engine the ressure is relieved in the member 23 of t e pump, thus permitting it to retract or assume its normal position and the rod 31 to move from the ipe 11. The partial vacuum thus creates will relieve the pressure on the inner sides of the valves 14- and 19 so that the valve 14 will close and the valve 19 will open, permitting a fresh char e of fuel to be drawn into the pipe 11 whic will he forced into the carbureter casing in the manner described.

In starting the device the cover 10 isclosed tightly on the carbureter casing and the engine 1s then cranked in the usual manner which causes a vacuum in the carbureter chamber. The vacuum thus formed will draw in a suliicient quantity of gasolene to Vcause an explosion in the engine which will start the latter afimr which the pump will be automatically operated by the successive exhausts of the engine in the manner de-v scribed. It will be understood that the cover 10 of the carburetor is kept continuously open except when the engine is started whereupon the cover is tightl closed to permit the vacuum to be formed by the pump in the carburetor chamber.

The length of the stroke of the pump is determine by the ad ustment of the sleeve 36 to and from the ange 35, so that the sleeve at the end of its stroke will strike said dange sooner or later. 'his adjustment of the sleeves is governed automatically by the opening or closing movement of the valve 43 which is governed by the operator in any usual manner. When the stem 42 of the` valve is turned to adjust the valve to a more or less open position to admit more or less fuel, the crank arm 44 will move the rod 41 longitudinally which will thus move the crank arm 40 and through it and the collar 39`t will rotate the sleeve 36 in the proper direction to shorten or lengthen the stroke of the pump, as may be necessary according to the speed of the engine.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as defined in the appended claims.

Having thus described my invention, what I claim is:

1. A force feed carbureter comprising a' charge supply tube a carbureter casing arranged thereon and connected thereto, an oil conducting pipe extending through Said casing and having inlet and discharge valves, a. reciprocating member alined with said oil pipe, a pipe for admitting fluid pressure to said member, a hollow flexible connection between said pipe and said member, a hollow flexible connection between said member and the oil conducting pipe, a fixed support for said member between the flexible connections, a flange on said member, and a sleeve adjustably mounted in said support in the ath ofthe flange.

Q. A force flied carbureter comprising a charge supply tube, a carbureter casing arranged thereon, an oil conducting pipe extending through said carbureter casing and discharging thereinto, inlet' and delivery valves in said pipe, a cover to close the casing, a reciprocatory member, a hollow flexible connection between one end of said member and said oil conducting pipe, a fluid pressure pipe, a hollow flexible connection between said pipe and the opposite end of said member, an adjustably mounted bushing surrounding the reciprocatory member,

a stop flange on said member adapted to engage the end of the bushing whereby to limit the stroke of the member, a collar se cured around said bushing, a throttle valve in said charge supply tube, and connections between the stem of said valve and the said collar whereby the bushing and the valve may be simultaneously adjusted.

3. A force feed carbureter comprising a charge supply tube, a carbureter casing arranged thereon, an oil conducting pipe extending through said carbureter casing and discharging thereinto and provided with inlet and outlet valves, a reciprocatory member, a hollow flexible connection between one end of said member and the oil conducting pipe, an engine exhaust pipe, a hollow fle-xible connection between said pipe and the opposite end of the reciprocatory member, a bushing surrounding the reciprocatory member and having a threaded mounting whereby it will move longitudinally when rotated, a stop flange on said member adapted to engage the end of the bushing whereby to limit the stroke of the member, a collar secured around said bushing, a throttle valve arranged in the charge supply tube and having its stem projecting laterally through the stem, a crank arm on said collar, a crank arm on said valved stem, and a connecting rod secured to and extending between said crank arms.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES W. FARQUHARSON.

Witnesses DANIEL J. QUINLON, ANNA M. OLsEN.

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