US1019128A - Carbureter. - Google Patents

Description

0.0. B ULOOK'. GARBURETER.

APPLICATION FILED APR. 6; 1911.

Patented Mar. 5, 1912.

za Q A Z l v z y crimes 0. Bullock, or CLEVELAND, omo.

-a citizen of the United States, residing at GARBURETER.

To all ivhom it may concern Be it known that I, CHARLES O. BULocK,

Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvements 'in-Carbureters, of

whichth'e followin is a full, clear, and exact description, re erencebeing had tothe accompanying drawings.

This invention relates use with'explcsionengines and has for its object the; revision of a device of this character -w ich shall exhibit great economy in the use of liquid fuel and shall at all times deliver to" the engine a properly constituted explosive mixture independent of the engines speed. Another object of the invention. is the provision of a device of this character wherein the mixture of ,fuel and airshall be maintained at substantially the same richness at all times while permitting the adjustment of the quantity of such mixture by 'means 9f the manipulation of' a single valve and 'furtherlobjects and advantages will become apparent in the course of the following description and claims.

One embodiment of my invention is illustrated inflthe drawingsaccompanying and forming apartof this specification, where.

1n: a i

Figure 1 is a longitudinal vertical cross sectional view through a carbureter built. in-

accordancexwith my invention and Fig. 2

is a detailside elevation of a portion of the mixing chamber and outlet branch.

Describing the parts by reference characters; my carburetor comprises an interiorly cylindrical casing lhaving near its upper end an annular passage 2, and having at its "lower end an axial fuel supply nozzle3. fuel supply nozzle is connected by IllQEtliS of a'duct- 4 with a gasolene reservoir 5 provided with means such as a float 6.

and float valve 7 for maintainingthe level of the fuel liquid just below the discharge orifice of the nozzle 3. Fluid fuel is supplied ,to this reservoir by means of a'pipe not shown) attached to the connection 8.

djacent the nozzle 3, the casing 1 isformcd with an air inlet port 10 and between this port and the passage 2 is formed an auxil- .1ary air inlet. port" 11. I Slidahly mounted within the casing 1 is a hollow piston 12 having between its ends an exterior annular Specification of Letters Patent. Application filed April 6, 1911. Serial m. 619,197.

to carbureters"; for

Patented Mar. 5, 1912.

groove or recess 13 adapted to register, with the auxiliary air inlet port 11 in all positions of the piston, and communicating with. the hollow interior of the piston by ports 14. Near its upper end the side walls of this piston are formed with laterally opening ports 15 adapted to be brought into reg isterwith the annular passage 2 when the piston is in its extreme depressedposition as illustrated in Fig. 1, and to -be brought out of register therewith when the piston is raised. This piston is provided with an operating rod 16 projecting through the apertured cover 17of the chamber and there connected to an operating lever 18. In the embodiment shown this lever is illustrated as of the bell crank type, having its shorter end 19 articulated to the end of the piston rod and having the angle of its elbow pivoted to a. link 20, the other end of which is pivoted to lugs 21 formed on the cover. -To the end of the operating arm of this lever is connected an operating rod (not shown) which leads to a position where it maybe readily reached bythe op erator. The lower end of this piston is interiorly contracted as shown at 24 and a carbure'ting tube 25 having a flaring or bell shaped portion 26 at its lower end is sei cured therein. .The upper end of the noz,- zle 3 projects upwardly into the flaring portion of this tube and has its exterior tapered at 27 preferably at a less angle than the angle of the bell 26 for a purpose to be hereinafter described. This carbureting tube is preferably formed with. an interior annular rib 28 substantially at the inner endofthe flaring portion 26.

The nozzle 3 is preferably secured 'in a vertical 'iuteriorly cylindrical threaded" sleeve 30 being introduced from within the casing and secured in place by a locked nut 31.- Radial ports 32 connect the central orifice thereof with the duct 4, and a needle valve 33 permits the adjustment of the pas sage therethrough, leakage around the needle valve being prevented by the gland 34.

The auxiliary air admission port 11 communicates with an extension 37 carried by the casing and having an aperture 38 formedin thewall thereof. Secured in this aperture is a spider 39 having a central guiding sleeve 40 in which is slidably mounted a valve stem 41 carrying a disk valve 42.

This valve is arranged to seat against the the valve.

inside of the spider 39, and the further end f It will benoted that there artfour ad- 4:1 of the valve stem'is preferably carried,

across the extension 37 and mounted in a recess 43 .formed in the further wall thereof,

This recess has. a longitildinal groove 43* in its wall and the end 4190f the valve'stem I fits snugly in the recess so as to form a dash potthat shall preventflchattering of The outside of ;the sleeve 40 is threaded to receive an adjusting nut 44 between the upper end of which and a collar 45fcarried by the valve stem a compression spring 46 is placed. The nut 44 is held against accidental displacement by means of the locking spring 47. WVith this construction it is obvious that a sufficient decrease of pressure Within the carburetor will cause the valve 42 to open against the pressure of the spring 46, and the pressure of the spring 46 can be adjusted by means of the nut 44.

The annular passage 2 communicates with a laterally extending branch 50 preferably formed integral-with the casing 1 and having at its upper end an open mouth 51 adapted to be connected to the inlet pipe of e an explosion engine.

The operation of the device is as follows: It is obvious that the main air inlet port 10 is always open and that the interior of thexpiston 12 is always in communication with'the auxiliary air inlet port 11. With thepiston '12 in'the position shown in Fig. 1 t h full suction of the engine will be transmittted to the carbureter because of the completely open condition of the ports 15. At thesame timethe air inlet aperture between the nozzle 3 and inlet iltube 25 is at its smallest extent, thus creating a maximum amount of suction upon the inlet noz zle 3 and causing the maximum amount of fuel tobe delivered therethrough. The remainder of the air necessary for the proper combustion of the fuel charge is admitted through the auxiliary air inlet valve 42, the tension of the spring 46 being. suitably adjusted to permit this action. If the piston 12 be raised, the effect-is twofold; the area of the inlet ports 15 is reduced, and the flaring portion 26v of the carburet'ing tube- Furthermore, I prefer to equip the cover 17 of the casing With'a set screw 53 so that the amount of closing of the ports'l5 can be limited to exactly that pointfat which the eng ne will run smoothly at its very slowest speed.

justments possible [with my .carbureter:

first, adjustment of the fuel supply by means of the needle valve'33; second, adjustment of the suction upon the nozzle 3 by moving the carbureting tube 25; third, the'adjustment of the spring 46 determining the pres- 'surerequired to open ,the auxiliary air inlet most economical results are obtained by opcrating the engine at the; highest speed at .vrhich-it is normally to run, meanwhile clos ing the needle valve 33 to the farthest point possible without impairing the running of the engine. The spring46 is adjustedatthe same time so as to admit the-largest quantity of air to the cylinder that is permissible. The piston 12 is then moved so as to slow the engine down and the carbureting tube 2.5 adjusted so as to cause the suctionupon the nozzle 3 to decrease at the proper ratio.

11 may -'be necessary after this is done to read'ust the valve '33 and spring 46, but a 9 few trials will adjust my carbureter soas to cause it to operate an engine smoothly at allspeeds and With the greatest possible economy of fuel. 0

While I have shown and described the auxiliary air inlet port as positioned be-- tween the main air inlet and mixture outlet ports, it is obvious that it could be placed beyond the mixture outlet port without changing the operation of the carbureter.- 5 lt is sufficient if this port be in communication with the interior of the piston at-the time. when the suction therein is so great that the passage between the carbureting tube and the nozzle is insufficient to deliver a sufficient quantity of air to combine with the charge. Furthermore, While I have necessarily described my invention in detail, I do not propose to be limited to such details except as the same may be positively in- 5 cluded in the claims hereto annexed,'or may be rendered necessary by the prior state of the arts Having thus described my invention, WhatI claim is:

1. In 'a carbureter, in combination, a cy.- lindrical chamber having a main air inlet port at one end, a mixture outlet port, and w an auxiliary air inlet port, a hollow piston slidably mounted in said cylinder and 12:, adapted when moved away from said air inlet port to close said mixture outlet port, the interior of saidpiston being always in communication with said auxiliary air inlet port, a carbureting tube carried by said 130 piston adjacent said air'vinlet port and havmg; a flaring outer end, a fluid fuel supply nozzle carried by said casing adjacent said air inlet port andprojecting into said carap'ex, means for supplying liquid fuel to semi-nozzle, a spring pressed valve assc ated; with said auxiliary a rinlet port and controlling the-supply'of air thereto, and meansv for adjusting the pressureat which saidfvalve opens. y -2.- In a carburetor, in combination an '.elongated chamber having a main air inlet port at one end, a mixture, outlet port, and

anauxillary air inlet port, a hollow piston slidably mounted in said chamber and aidapted when moved away from said air inlet port to close said mixture outlet, port, the interior of said piston being always in communication with said auxiliary air inlet port and the sole communication lietween allsaid'ports being through the interior of said piston, a carburetingtube carried by said plston'adjacent said air inlet port and justing said tube along said piston, a fluid fuel .supply nozzle carried by said casing adjacentsaid air inlet port and pro ecting into said carbureting'tube, means for sup sition'and to be moved upwardly a suflicient distance to completely close said; outlet port, a carbureting tube carried by the lower end of said piston and communicating with said maincalr inlet port, a fluid .fuel supply 1 nozzle carried by said casing and projecting into said carbureting tube in all positions of said iston, and a pressure operated valve associated with said auxiliary air inlet port and adapted to permit-the entrance of a Seconda'ry supply of air thereto dependent upon the amount of suction in said chamber, said auxiliary air, inlet port being always in communication with the interior of said pis- 4. In a carbureter, in combination, achamher having a main air inlet port at one end, a mixture outlet port adjacent the other end,

1 a hollow piston slidably mounted in said 7 chamber and adaptedWhen moved away a from said air inlet port to close said mixture ;@outlet port, a carbureting tube carried lay said piston-adjacent said air inlet port an haybureting tube, said nozzle having a tapered having a flaring'outer end, means for adarranged so thg81d car ing a flaring end ,a fluid fuel supply nozzle carriedby said casing adjacent said air inlet port and projecting into said carbureting tube, the apex of said nozzle being tapered at a less degree than the flared end of said tube, and a fluid fuel supply reservoir communicating with saidnozzle.

5. In a carbureter, in combination, an upright cylindrical chamber having a mainair inlet port adjacent its lower end, a mixture outlet port spaced from its upper end, and an auxiliary air inlet port, a hollow slidable piston in said cylinder and having ports in its wall adapted to register with said mixture outlet. port when said piston is at its lowest position and to move out of registry therewith as said piston is raised, a carbureting tube carried by the lower'end of said piston and communicating with said main.

air inlet port, a fluid fuel supply nozzle carriedby said casing and projeoting'into said carbmrcting tube, a spring valve associated with said auxiliary air inlet port and adapted to permit the entrance of a secondary supf ply of air thereto dependent upon the amount of suction in said chamber, said auxiliary air inlet port being always in communication with the interior of said piston, means for adjusting the opening through said nozzle,

and means-for adjusting the tension of said, spring valve.

6. In a carburetor, elongated chamber havmg a main an inlet port atone end, a mlxture outlet port ad a-,

"cent the other end, and a fluidfuel supply nozzle adjacent said air inlet port, a hollow piston slidable in said. chamber and having ports in its wall adapted to register with said mixture outlet port, and a carbureting tube surrounding said nozzle and communicating with said main air inlet port, said piston being arranged to draw said carburet: 'ing tube away from said nozzle as said ports are movedout of register with said mixture outlet passage, the relative positions of said tube and nozzle being such that said tube can never be withdrawn entirely from said nozzle.

in combination, an i 7. In a carburetor, in combination, an'

elongated chamber having a main air inlet port at one end, a mixture outlet port, and an auxiliary air inlet port, a fluid supply nozzle carried by said casing adjacent said main air inlet port, means for supplying fluid fuelto said nozzle, a hollow piston slidable in said,

chamber and having ports in its wall adapted to be brought into register with said mix ture outlet'port and having ports in-its wall.-

always in communication with s'aid auxili-.-

ary air inlet port, a carbureting tube adjllSb ably carried by said piston and having .a.

flaring end surrounding said fuel supply nozzle and being in free communication not said main air inlet port, .sald pistonv being iuret-ing tube will be drawn partly away from said nozzle as said mixture outlet ports are closed and the length of said tube and nozzle being such. that they can never be drawn'entirely away- 8. In a carbureter, in combination,-a casing having an air-inlet port and a mixture. outlet passage, a taperingyfuel supply nozzle in said casing adjacent sa d'inlet port,a'n adjusting valve in said nozzle, a valve for said mixture outlet passage, a carburetlng tube-m v said casing'and surrounding said nozzle for causing the air enteringsaid inlet portto create a suction upon said nozzle, sa-lditube 1 having a cylindrical iiortion beyond the end- 20 of -'the'nozz1e, aflaring end surrounding said nozzle, and an'inwardly projecting rib at the junction of said cylindrieal'and flaring por- 1 tions; and means for drawing said tube away from said nozzle as said Valve is closed 25 so as to increase the opening therethrough and to decrease the suction thereupon.

' iIn testimony whereof, I hereunto aflix m'ysignature in the presence of two Witnesses.

- CHARLES OfBULOCKh HAROLDEI Si ter-1a,.

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