US1457112A - Carburetor - Google Patents

Description

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D. A. GORMLEY ET AL' L CARBURETOR Filed Aug. 1G, 1920 y 2 Sheets-Sheet 2 Paiemea May 29, 1923.

imitan stares Param stica. j

DENNIs A. GOEMLEY AND DANIEL w. EEID, OEATLANTIC CITY, NEW JERSEY.

CARBURETOR.

Application mea Augst 16, lazo. serial No. 404,010.

or combined withfthe carburetor; to, provide fuel supply and lcontrol devices whichlope-rate satisfactorily without afloat. chamber; to provide means for'regulating the fuel supply and atomizing the fuel inan improved yand economical manner; to provideinterconnected air control or throttle mechanism and fuel control valve mechanism of a new and improved form; and to improve andsunplify the construction of carburetors 1n other respects.

The characteristics and advantages of the rinvention are sufficiently further described in the following detail descriptiony of the'accompanying drawings which show lone exemplifying embodiment of the invention. After considering this itr will be apparent to persons skilled in the art that many modi'- Y cations may be made within the principles of the invention, and we contemplate the employment of'any vstructures which are properly within the scopeof thel'a'ppended claims.

In the drawing:

Fig. *.1 is a side elevation of a' typical'internal combustion engine with the carburetor attached.V

Fig. 2`is an enlarged side'elevation of the carburetor.

Fig. 3 is an endview.

Fig. 4 shows a modified form of our de vice, with parts broken interior mechanism. l j

Fig. 5 is a cross-section of the device shown in Fig. 4f along the line 5 5.

Referring to the drawings, there is shown an internal combustion engine 'designated by the numeral 1, having an' exhaust'm'anifold 2 and an intake manifold 3. Attached to the exhaust lmanifold is a metaleheater `away vto show the box or container-4. This heater box is fas? tened to the exhaust manifoldv 2 by means of suitable bolts or rivets 5, and leading to the interior of this box isa pipe', which conducts heated exhaust gasesfrom a point v 6 of the exhaust manifold into the interior of the box.

y From the gasoline tank, (not shown) there is prpvided a pipe k7 which leads to the heater box 4;, and `is bent in convolutionsf for va portion of its length as designated-by the numeral 8 within the heater box. The length of the convolutions v 8 `and the construction ofthe heater box are such that the fuel passing through pipe 7 will be thoroughly heated in its'passage through the heaterk box. From the lower end of the heater box 4, the heated fuel passes through a pipe 8 to a mixin chamber 10, which is suitably bolted by bolts 11"to the intake vmanifold 3. The pipe 8 beforeits entrance into the mixing chamber 10 has a restrictedportion'), the lexit of .which has ya conical shapeyinto Awhich is adaptedto ft the end 10 of a needle valve.l

integrally formedwith'they needle 10" is a washer 11 that precludes the upward movement of the needleA beyondr a certain predetermined point.

v The pipe 8 is provided with an elbow 12 projecting horizontally at a right angle to the pipe, and this elbowl is constructed with a collar 12 that serves to attach the pipe to the wall of the mixing chamber 10.

integrallyv formed with the elbow 12 is an extension 13 constituting the atomizer the mixing chamber 10. This atomizer 13 is hollow and of cylindrical shape, and has a series vof relatively small apertures 14:,

-proper and projecting at right angles into leading from the interior` hollow portion to the exterior surface. closingmember or passage of any gas ene out the end of the atomizer 13. Facing the upward current of There is provided a plug'l which prevents l o air .from the. chamber 10, thereis a large v circular aperture 1 6 cut intok theatomizer V Vthere is an atomizing e`ectl due to the v seepage of gasolene through the small holes 14, whichgasolene is taken up from the ex terior ofthe atomizer 13, by the lcurrent kof air passing around the structure.

Constructed integrally with the wall of the mixing' chamber 10 is an extension wall 17 forming the side walls of a housing for a valve controlling structure to be later described. This housing is provided with a cover plate 18 which is detachably secured to the wall 1T of the housing. Attached toI the needle valve and preferably formed as an extension of the needle structure is a connecting shaft 19 provided on one face with a rack 20. rlhe'shaft 19 is adapted to extend through the upper wall 1T of the housing and out through the lower wall. The housing thus forms a bearing within which the rod 19 reciprocates. Therack 20 is adapted to'engage with a gear 21, which rotates on a shaft 21', that is supported in a strip 22 that extends across the interior of the housing. 1n mesh with thegear 21 is a pinion 22. keyed to a shaft 23, to which is attached a butterflyvalve 23", that controls the flow of the air into the mixing chamber 10. This shaft 23 extends to the exterior ofthe housing and is keyed to an operating link 24, which is manually opera,- ble, preferably from the drivers seat in the case of the application of my invention to an automobile. To control' the admission of air through the inlet 26 of the mixing chamber, there is provided a second' valve 26 operated by link 27. This valve is adapted to be set in accordance. with the weather and is ordinarily not changed except as the temperature demands it Attached tothe inlet end 26" of the mixing chamber 1Q is a metal pipe 2S, which for a portion of its length iscoiled around the exhaust manif fold 2 so that the air sucked through. the end 29 of the pipe will be preheated by the hot exhaust gases before its entrancefinto the mixing chamber.

From the foregoing, it will be seen that we have devised a carburetor in which the gasolene is preheated through the coils 8 of the heating chamber 4, by reason of the fact that the heating chamber 4 is connectedby pipe 6 to the interior of the exhaust manifold. The air is preheated by being drawn through a pipe 28 that encircles the exhaust manifold. The heated fuel passes into the atomizer 134 and escapes through holes 1'4'. The upward flow of hot air throughy aperture 16 and over the atomizer thoroughly atomizes the fuel and forms a suitable mixture. The proportion of gasoline to air is regulated by means of the rack and pinion mechanism previously described. The shaft 23 having been rotated by link 24Yto admit a certain amount of air through the butterfly valve 23 rotates with it the pinion 2,2, which in turn rotates the gear 21 and this, by reason of its operative engagement with the rack 20, reciprocates. the shaft 19,` and controls the position of the needle 10 in the end of the passage 9 of the gasolene intake pipe. rl`hus the proportion ofgasolene to airv having once been determined by experiment will remain fixed and the proper mixture will always be obtained. Regulation for the outside temperature is made through regulation of the valve 26, and the proper position of this valve for greatest efficiency having been once determined the operator will seldom have occasion to make readjustment.

Referring to Figs. 4 and 5 which show a modification of' our invention, there is shown a split castingr 3Q bolted together by bolts 30'.' This casting is threaded at 31 to permit its being screwed in place on screw threads 32 formed on the end of the mixing chamber 10. The mixing chamber l0 in this case is cut oif slightly below the atomizer 13. The casting 304 is provided with a cylindrical chamber 33, in which is adapted' to reciprocate valve stem 34, which protrudes through the bottom of the casting 30 through a hole therein, as designated' by the numeral 34j.

Screw threaded to the upper end. ofthe shaft 34 is a conical valve 35which is fitted to accurately engage the conical valve seat 36 formed in the castingy 30,. There is provided a key 37 Which fits within the casting 30 and has a lug 38 that protrudes into the cylindrical chamber This key' 37 fits into a keyway 39 of' a rack 39 to which the valve stem 34 is attached. Keyed to a shaft 40 by a key 41 is a gear 41 which meshes with the rack 39.V The shaft 40 is adapted to be rotated by means of a link 24.l Meshing with the pinion, 4l is a rack 42 that fits within a, cylindrical passageway of the casting.l This rack 42 is lattached to the connecting shaft 19. Which, operates the needle valve. The operation of; this modified struci ture is quite similar to the operationof the first described construction. Upon rotation ofthe shaft 40, the gear 41j,k rotates to operate the rack 39, which controls the air inletvalve, and the rack 42, which controls the; needle valve admitting the gasolene. Thisy construction hasbeen found toloey particularly sturdy and simple to manufacture.

Vhile we have described but twoembodiments of our invention, itis apparenty that many modications may be made. therein by thoseiskilledL in the art withoutdeparting from the spirit thereof, and we desire,vther;e fore, that our invention be limited only set forth inthe appended claims or byfthe showing of the prior art.A

We claim:y

1. In a carbure torincombination,witha body providing an air, passage,I and al throtn tle, a fuel atomizingtube.intersecting the air passage and proyided with a plurality of small fuel apertures and also provided., with a larger air aperture directedl against,y the flow of' air in said'` passage, and means for supplying` fuel to the tube at one end.,l

2. A carburetor comprising a body having an air passage formed with a throttle seat,

parallel to said stem, a gear located between the rack members an engaging both of them, a shaft having bearings inthe body and carrying said gear and arranged for ro tation by the operator, a fuel pipe having discharge means in the air passage above the throttle, a Valve seat controlling flow of fuel to the fuel pipe, and a Valve cooperating With the fuel valve vseat and connected With' 15 said fuel valve rack member. v

- Signed at Atlantic City, in the county of Atlantic and tate'of New Jersey, this 9th Y Y day of August, A. D. 1920.

DENNIS A.V GORMLEY. DANIEL W'REID.

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