US1140722A - Carbureter. - Google Patents

Description

N'. C. STAMPS.

CARBURETER.

APPLICATION FILED 8.24, 1952.

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CARBUBETER. APPUCATIDN men FEB. 24. 1912.

Patent-ed May 25, 1915.

2 SHEETS-SHEET 2.

cnneonn'rnn.

Specification of Letters retest.

. Patented May 25, ifiifi.

Application filed February es, 191%. Serial 3K0. $79,684.

To all whom it may concern:

Be it known that I, NATHANIEL C. STAMPs, a citizen of the Uniteii States-residing at Los Angeles, in the county of Los'Angeles and State of California, have invented new and useful Improvements in Carbureters, of which the foil Wing is a. specification.

This inventionrelates to improvements in carbureters and particularly such; as erenseful in connection with explosive gas engines used upon auto vehicles, aeroplanes or the like. It is an object of the invention to provide a carburetor for explosive engines in which the gasolene and air feed as Well as the throttle mechanism are at all times under a positive control for delivering their proportionate quantities of materials.

It is a further object .ofthe invf-ntion to provide a carburetor which-may he set at low speed for starting the operation of the engine and which is provided. with, on n11 controlling inlet, adapted to be positively operated in connection With the throttle mechanism and which is also capable of correspondingly increasing the flow of gasolene.

.It is a still further object of the invention to provide such a mechnnismwvith means to facilitate the starting of an aeroplane, Where the throttle of the engine must be opened.

before the aeroplane is permitted to move and where the air supply should be somewhat modified beyond the normal arrengemerit of the device when the aeroplane is in movement.

In the accompanying drawing forniing a' port of this specificatiom Figure 1 is a View partially in section and partiaily in side elevation of the improved carbureter forming the subject matter of this invention, the float chamber and the gasolene supply valve being shown in section while the other portions are in elevation. Fig. 2 is transverse vertical sectionzil view through the mixing chamber and the throttle mechanism. Fig. 3 is a detail sectional view taken upon the line 3% of Fig. 1. Fig. i is a sectional view taken upon the line of Fig. 1, {toljacent portions of the, l'nechanism being shown in elevation. tion of the upper partof the carbureter looking at the inlet end. ofilic auxilizury air sup-- ply. Fig. iiis' 'apfraglnentai'y detail sectional view taken through the walls of the mixing Fig. '5 is a side eleviv" chamber and snowing the adjustahlesliries contrel-lingthe air inlets theretc, the 8.611215? .ehleiplaee for operatingthe gasolene inlet being-illustrated in top piangvievv- Fig. 7 is e detail sectional view tl'irough the 'bypass mechenisin for permitting of the priming of the engine arouirdthe throttle valve.v v 1 This invention s for. e device similar. to

that described and. claimed by niein epplication filed, by meow-Aug. Z,- 1911, hearing S. {Bl fiefif'fil, ancl (the present device isan iinprovemen t: upon the cerlonreter discioseii inthat application. The deteils 'nngii ifeetnres iii-the invention will now hemorepartienlarl' diescribeli, reterence being had to the saiu (1: iving in l e 10 indicates a cesing having;apa-ssage 11 formed therein, the said passage being open to theatinosphere one encl while the other end. leads into ,the mixing phamocr of the device} gThe passage-is for-meal svith'n' celltrellydepresseil portioniQ forming e-goose neck ande partition 13 pretends downwardly into said goose neckto iii-point near thehotton oi; the passage. A hearing 14 is formed centrallym: said partition to receive nneeclle valve 15 which controlsthe inlet of gssolene totlie cerbnreter from. the float chamber.

The-device is provided with the usual fioetmhamberlfj having a Heat 17 therein,

adapted to operate a valve controliing lever 18.. The said lever controlsa, gasolene snp-- ply valve. 19in the penal marine-n Gasolene is introdnceil from the host chamber -to the goose neck lfiZthrouglipassage 20, which is orn ailytcontrclled at its upper end by a tapered portion oi the needle valve. The goose neekis also provide& with an overflow. pipe 21, which directs any surplus gasolene through a bore QZforrnecl inthe casing and which wili lend. the some outside the Imechanisin. The upper portion of the-needle valve passes through e'chainber 23 foiinedin the casing ltlanti si'spring 2i surrounds the said needle valve hearing at itslower endiegainst a collar 25 ,formed upon the valve, so as to tend to piisli th e valve to its sealt while the upper end. 'h are iigaiirst a removable plug 26 inserted in} t 9. upper. end of the said chamber 23 and fclapteii to 'illose the same. The said. needle valve projects through said ping .a'nch is formed with an upper screw threaded porti'pik which orljustably engages a transverse bar 28.

- apertured at 46 for the inlet of air. I said vertical wall portion the mining cham- The upper. end of the needle valve is formed with a milled head 29 by which it may be turned when it is necessary to adjust it with respect to the bar 28. The said bar 28 is employed to lift the needle valve to a proper extent, for feeding the reguired amounts'of gasolene to the carburetor rom timeto time. The said bar is pro-- vided with reduced end portions which project in opposite directions therefrom and are provided at their outer ends with anti-friction rollers 30 and 31 for guiding the moveincnt of said bar. The roller 30 engages a bifurcated projection 62 which risesfrom the casing 10. The friction .wheel 31 engages a slot formed in a bar arranged upon the side of the upper part of the easing. In this manner the said. bar 28 is positively guided in its vertical. movement in raising or lowering the needle valve, so that there can be no possible binding action in the movement of the needle valve. One end of the bar 28 also carries a roller 35 which engages an adjustable lifting plate, which. will be hereinafter described whereby the.

movement of the needle valve is positively controlled. A valve lifting means is also provided, comprising an arm 36 which is connected, with operated by a lever 37. The said lever 37 is pivoted at 38 tothe bifurcated projection 32 and its outer free end engages the groove of a collar 40 which is secured to an operating rod operating rod 4-1 moves in any suitable bearing, usually afforded by a tube 42 and extends to any desired point formanipulation by the operator of the engine. The said arm 36 projects beneath an antifriction roller 43 mounted upon the side of the bar 28, so that when the rod 41 is pulled upon, the said arm may be caused tolilt the needle valve and thus supply additional.

gasolene to the carbureter.

- The air which is, drawn into the carbu rater through the pa neck 12, takes up an asolene in the g'oose neck and passes thence into the bottom. of the mixing chamber 4 through an opening 45. The floor of said mixing chamber 44 is curved dovmwardly and made to converge to the said opening 45, so that any slight c'ollections of gasolono within the mixing chamber will always be directed back into the incoming stream of carburcted air. By thisconstruction it is impossible iorthe carburetor to become clogged or flooded in the mixing chamber.

The mixing chamber is formed of a considerably greater diameter than the inlet Opem'n 45 d is provided with vertical walls .or a portion of its height which are Abm'e her is contracted until. a proper sized passage 47 15 formed for the reception of the The said age 1.1 and the goose throttlevalve 48. The formation of the the walls of the'passage 47 and an operating lever 50 is secured to one end of said shaft,

which is adapted for operating the means which controls the air openings 46 inthe walls of the mixing chamber. The said openings 46 are controlled by means of cylindrical slide plates 52 and 53, the'flsald plates being formed with openings which can be brought into coincidence .with the two slides 52 and 53, are normally moved with their apertures 54 and 55 in coincidence with each other so that when they are brought opposite the openings 46, the said openings, may be uncovered" to'a greater or less degree. The inner slide 52 is provided with a flange 56 extending along its upper edge by which it may be turned an arm 57 projecting .therefrom'at one point and bein connected with the arm 51 by means of a link 58. The said link 58 is provided'with ball and socket connections '59 and 60 at its ends and by which it is movably connected with the said arms 51 and 57.

openings 46 for the admission of air, The

The outer plate 53 is held in its normal when desired against the action of the spring 61. The said arm 63 'alsocarries a lug 64 which bears against an adjusting screw 65 carried by a depending l tandard 66,- which projects from the said arm '57 of the plate 52. It will be seen by reference to Fig. 1 that the said spring 61 tendsto hold I the lug 64 against the adjusting screw 65 and when in this position the apertures 5-2 and 55 of the two plates 52 and 53 coincide.

A rod 67 is provided and connects with the outerend of the arm 63 so as to e mit 'the holding or movement of the-plate 53 against the action of the spring 61 when the openin of the apertures 46 is to be prevented. T is is desirableat times and paitieularly in the starting of gas cn'girles which are employed upon aeroplanes.- 'In;

starting aeroplanes the engine usually as to be operated with the throttle open andiat first it is not desired to have as much ir admitted, as would normally be admitted )y the mechanism of the present device wh .n

the throttle is open. As soon as the parts are in normal running condition the rod 67 while the opposite end carries an arm 51 N ducing air is positively controlled in relation'to the movement of the throttle through the agency of the link 58. The inlet of gaso- 18118315 also positively controlled in. proper proportion to the amount of air entering the carbureter, by means of a cam plate 68 which is adjustably mounted upon a widened portion of the flange 56. One end of the said plate 68 is secured to the said flange by means of set screws 69 which engage aslot 70. The slot is suificiently elongated to permit of a slight adjustment of the plate in putting it in place. The said plate is also aclgustably held at intermediate means of set screws 71, 72, 73 and a. Eac of said set screws, except the screw 71, engages a screw threaded opening formed in the flange 56 and the upper end'of each screw projects upwardly through the same and is formed with an annular groove 75, adapted to engage a slot 76 arranged opposite thereto. Each of the said slots 76 is made with enlarged end portions as shown in Fig. 6 so that the ends ofthe screws may be inserted'therein in assembling the parts and the annular grooves be caused to engage the reduced ends of said slots. It will be understood that by turningthe screws in their threaded apertures on the flange 56,

the extent to which the plate 68 is raised above the said Flange 56 mav be determined.

The screw 71 is connected with the plate 68 in likemanneras the screws 72, 73 and 74:,but instead of engaging a screw threaded aperture inihe flan e 56, it passes through a slot 78 in the sai the said flange. The said nut 79 is located so closely to the slide 53 that it will not turn but the screw 71 may beturned for clamping the plate 68 to the said flange 56. By.

this construction it will be seen that the screw 71 may be moved so as to draw the said cam plate 68 downwardly at one oint or may be moved along in the slot 8 to draw it down at another point so that thechamber. It will be observed that as the points b fiangeso as to be ad-' 'justable therein and carries a nut 79 below throttle valve is open and-the slides begin to open the air inlets, that the roller 35 will be caused to ride upwardly upon the said cam plate 68 for introducing more and more gasolene.

After an engine has been speeded to a high rate, the inflow of gasolene due to the suction is somewhat increased above that which is desired and in order to obtain the full benefit thereof and the power which should be developed through its use, it is necessary to introduce additional air'usually above the throttle valve. For this purpose the casing is formed with a passage 80 in the material of the casing around the'upper portion of the passage 48 as clearly shown in Figs. 2 and 7. The said passage 80 is connected by apertures 81 with .the throttle passages? Air is admitted to the passage 80 whendesired by means of a series of p assages 82 which extend through a pro ect1on 83 formed upon the carbureter casing. Near the outer endsof said apertures80 a transverse valve 84 is mountedhaving passages 85 formed therein adapted to be brought into coincidence with the passages 82 when it is desired toQadmit air to the carbureter through the same. WVhen the valve is turned to the position shown in Fig. 2, the entrance of air is cut off. One end of the said valve outside the casingwhich is provided with a controlling rod 87 extending to any suitable .which facilitates its proper action. Both of the'said operating rods 41 and 87 are preferably made of steel wire such as piano wire and the guiding tubes l2 and 88 prevent them from doubling in use. Air introduced through the apertures 82is distributed by means of the circular passage 80, around the throttle passage so as to enter the same from allsides thereof. This arrangement is similar to the arrangement of the air inlets 46, it being found that the introduction cf'air from the various sides of the chambers and passages of the carburete'r tend to centralize the column of carbureted materials passing to the engine. The carbureter also no vided with means for directing prin ing gasolene to a suitable point adjacent to the throttle valve. For this purpose a bypass passage 89 is formed in the casing of the throttle valve, its upper end being connected with the air passage 80 while its lower end is formed with an opening 90 connecting with the throttle passage below the throttle valve as clearly seenfin Fig. 7, An adjusting screw 91fmounted in the casing is adapt- .edto control'the extent of opening at the said aperture 90.- This by-pass connection facilitates the starting of the engine at low speed and aifords a path for the carbureted material around the throttle valve, and the 8a'is provided with an operating arm 86 throttle valve does not therefore have to I priming pipe 92 extends from the by-pass 39, at av pointabove the opening- 90, ownwardly outside the casing to the goose neck v and then extends into the neck encl to a point near the bottom thereof as clearly shown 1n Fig. 1. In starting the engine a priming of gasolene is introduced into the goose neck 12, the needle valve of course being closed and the initial movement of the enginewill, through its suction, draw the gasolene through the pipe 92 and through the by-pass 89 around the throttle mechanism and into the cylinders of the engine for starting the same. As soon as the engine is under Way, the gasolene 1n the goose neck will be quickly taken up by the.

inrushing air and. the lower end of said pipe 92 will thus be uncovered and a small quantity of air will pass through the same to the throttle mechanism.

v The operation of the mechanism will-hev readily understood from the above description. In starting the engine as .When in use upon an automobile, the priming is intcos duoed into the goose neck in any desired manner and the engine is caused to take its initial movement. The priming will be drawn through the, pipe 92, above the throttle valve and into the cylinders of the en- .gine. The suction of the engine will immediately begin to draw air through the passage 11, taking up the gasolene from the goose neck and drawing in a mixture of air 'anclgasolene through the mixing chamber. {As the engine is to he speeded the lever is operated for turning the throttle, and opening the same, the arm 51 and link 58 at the same timecorrespondingly moving slides 52 and 53 for admitting air through. the several openings 46. The cam plate 68. will also be carried beneath the roller 35 to begin the elevation of the needle valve from its scat for the introduction of gasolcne in corrospoudencc with the amount of air fed into the mixing, chan'lber. If, at any time, it is thought desirable to introduce more gasolone tcmymrarily, the rod 41 is pulled upon thus lifting thcneedle valve 15 more than it would be lifted by the cam (38. In r1mning the engine ativory high speeds. additional air is also admitted above the throttle by operating the valve 84.

As already intimated, in using a gasolcne engine for aeroplanes thcrngine is usually started with the throttle open and in this case it is (lvsirrel. at first to prevent a great deal of air entering throughflthe ing a gesolen e inlet, a va e controlling apertures in its Walls, a throttle valve, an

apertures 46 until the aeropliine is under way In order to prevent the entrance oi air at such time therod 67 move the slide 53 against the action ofthe, 'spring 61 and thus close degree apertures throu h which the air en:

is operated to ters the ruining chain er. As soon as a; proper action at the engine has been estab- 1 lished however, the rod 6'1 is again relea and the movement of the slides 52 and- 53. 7

becomes automatic in correspondence with the action of the throttle valve l What I claim .1, A carburetor,

mrt s e asing is? same, a mixing chamber having air ml to a greater or lessf' o apertured slide. for controlling thejairhe] I let opening, means connecting the throttle valve with said slide, an adjustable plate carried by said slide, ada ted toop-Q crate the needle valve for intro cing more; gasolene when the air inlets are opened byrcgistcring said a ertures, and a lever man-.5 ually operated inu-ependent of liftingsaid needle valve. I

2. A carburetor, comprising a casing hat inga gasolene inlet, a needlevalve cont- .i ling; the same, a' spring normally tending 1,

close the same, a can a movement of the throttle means projecting the nee le valve en- 0 t-e operable by the mechanism ofthe engine for lifting the needle valve, and an zu'ixiliary lifting means made 11 of an arm,

at Slide. it's m gaging said arm, and means for operating 10 i said ar n.

3; it carbureter, comprising a casing having a gasolene inlet and an air, inlet, a mixing chamber connected with said air inlet and having airo enings circular slide adapter to control said .air

openings and having openings in its walls,

an auxiliary slide mounted outside the said circular slide and, having openings, the first in its walls, a 1

mentioned circular slide having a stud pro- 1101' jccting therefrom, a lug carried upon the outer slide and. adaptedib engage said stud; a spring mutually tending to hold the lug against said stud for holding the openings of the slide in coincidence, means for mow 1 ing the outer slide against the actionpf the sald spring for moving the slides with respect to each other, and means for moving the said slides in correspondence with the movement of the engine throttle mechanism; 111

4. A carburetor, comprising a casing hav ing" a circuitous passage therethrou h, a, gasolene teed controlling valve, a mixing chamber having two series of airinlets in its walls, a throttle valve mounted in the i a 1M:

sage intermediate said series of air inlet'sfto;

said mixing chamber, means for operating l the gasolene valve, in accordance with the movement ol' the throttle incchanism,-meansfor controlling the a inlets ln-aecotdance xii with the movement of said throttle mechanism, a Icy-pass connecting the mixture passage on either side of the throttle, and means for carrying to and controlling a priming charge passed through said by-pass in starting the engine.

5. A carburetor, comprising a casing having an air and gasolene inlet, a valve controlling the inlet of gasolene, the air inlet having a goose neck chamber therein adapted to recei e a priming liquid, a priming mechanism, the casing being provided-with a passage extending around said throttle mechanism, a priming feed pipe extending from said passage to the goose neck of the air inlet, for directing the priming material to the passage around said throttle, and means for controlling the said throttle and gasolene inlet in accordance with each other.

6. A carhureter, comprising a casing having a passage therethrough provided with a plurality of air inlets and a single mixture outlet, a disposed end forming an air inlet of said passage fromvsaid outlet, a mixing intermediate said fuel inlet and {said mixture outlet, formed of an enlargement of said passage in its Walls, oscillatingaperturedvvelves to fuel inlet adjacent the oppositely.

chamber having two series-of apertures control the passage of air through said aper tures, a throttle valve intermediate said series of apertures in said chamber, and means to operate said valves..

7. A carloureter, comprising ing a gasolene feed and an air feed, a needle valve controlling the gasolene feed an adjustabl'ecam plate adapted to lift the needle valve at a predetermined period, a slotted plate positively connected with the throttle carrying said cam plate, screws adjustably supporting said cam plate in position, and capable of adjustment with respect to each other to vary the extent of movement of the needle valve, and a clamping screw adjustably carried in the slot of said plate upon which the cam plate is mounted adapted to draw the said cam. plate tightly against vthe same at one point or another in accordance with its adjustment for controlling the time when theaneedle valve begins to be raised from its seat.

In witness that I claim have hereunto subscribed my day of February, 1912 na'rnanin es'raiars.

' Witnesses:

' :Sranmra'n, IEARLE R. ?otmn'c,

name this 16th a casing havthe foregoing l sov

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