US1981483A

US1981483A - Carburetor

Info

Publication number: US1981483A
Application number: US417609A
Authority: US
Inventors: Walter H Weber
Original assignee: Detroit Lubricator Co
Current assignee: Detroit Lubricator Co
Priority date: 1929-12-31
Filing date: 1929-12-31
Publication date: 1934-11-20
Anticipated expiration: 1951-11-20

Description

Nov. 2o, 1934. I W- H, WEBER 1,981,483

CARBURETOR Filed Dec.l 3l, 1929 4 Sheets-Sheet 1 NCIV.y 20, 1934. W, H WEBER 1,981,483

' CARBURETOR Filed Dec. 51, 1929 4 Sheets-Sheet 2 W. H. WEBER Nov'. zo, 1934.

CARBURETOR 4 Sheets-Sheet 3 Filed Dec. 3l, 1929 Nov. 20, 1934.

W. H. WEBER CARBURETOR -Filed Dec. 5l, 1929 4 Sheets-Sheet 4 themed Nov. zo, 1934- 1, S)81,1 48.

i' CARBURETOR.

Walter 1I. Weber, Detroit, Mich., assigner to Detroit Lubricator Company, Detroit, Mich., a corporation of Michigan A.vlllllicationDecember 31, 1929, Serial No.41'7,609 '37 Claims. (Ul: mii-34) My invention relates to new and useful imshowingfrom left 'to right the relative positions provements in carburetors for supplying a Vconfof certain ports `and passages during operation bustibl'e charge to the cylinderl or cylinders of an of the modiflcation of Fig. 9.

' internal combustion engine. f Referring to the drawings by characters of 5 In such carburetors it has been found that a reference, 1 designates, generally, a carburetor, 60

combustible charge having the proper ratio ofy preferably of metal, and comprising abody memliquid fuel to air, to be economical for normal ber of hollow construction having air and fuel l operating conditions, does not lprovide the inlets and including a base member 2 and a requisite ratio of liquid fuel to air for quick startthrottle body member 3. The member 2 has a ing, Athe Warmingfup" period, rapid accelerabottom wall i from which rise substantially par- 65 tion, and high power demands of the engine,

allel side walls

5, 6, respectively,`and end walls particularly when employed to drive a motor ve- 7,8, respectively, which join the

walls

5, 6. Interhicle. L mediate the walls 7, 8 is a partition or wall mem- An object of* my invention is, therefore, to ber 9`which extends transversely between and provide a barburetor which will operate effijoins the

walls

5, 6. 'Ihe substantially rectangu- 70 ciently to supply a proper combustible charge lar' spacel defined by

walls

5, 6, 8 and 9 comto the engine for all periods and( conditions of prises an airinlet chamber 10 which is supplied its operation. i with air, preferablyatmospheric, by an air inlet Other and further objects and advantages of passage or conduit Il which opens through the a carburetor embodying my invention will apend wa1l 8 and which is preferably substantially 75 pear hereinafter in the detailed description of cylindrical.. The entrance to passage 11 is prefstructure4 and operation thereof. erablyguarded by means of a deiiectorf plate or The invention consists in the `.improved conbaflle 12 rigidly supportedin overlying spaced v struction and combination of parts and their relation to the mouth of passage 11 by a bracket ageroupment in Operative relation, to be more member 13 nxed to member 2 by screws or the 80 fully described hereinafter, and the novelty of like 14. The end wall 7 is preferably curved horiwhich will be-\particularly pointed outl and diszontally and defines with

walls

5, 6, 9 and bottom ti'nctly claimed. wal14 a float chamber or fuel reservoir v15. With- In the accompanying drawings, to be taken in chamber-d5 is a vertical bracket 16 (Figs. 2 as 'part of this specification, I' have fully and and 5) integral with and extending outward from 85 clearly illustrated a preferred embodiment of wa11` 9, upward from wall 4, and terminating bey, my invention and certain modiflcations'thereof, low the top of chamber l5. Between bracket 16 l in which drawingsand side wall 5,'is an internally threaded vertical y Figure 1 is atop plan view, withncertain parts sleeve 17,'the bore of which opens vthrough an broken away, of a carburetor of my invention; aperture 18 in wal14. Depending from the under 90 Fig. 2 is a view of the carburetor in front eleside of bottom wall a and concentric with apervation, partially i :vertical central section and ture 18, is a flange 19, preferably circular.

hai/ills Darts'bioken away: j. Threaded into sleeve 17v through aperture 18, is Fig. 3ds a v1eW in end elevation looking from a stud 20 having in its upper end an axial bore 4Q Vthe left toward the'rlght 0f Flg- 1; 21 opening into atransverse passage 22 through 95 Fig. 4 is a view in end elevation, partially in said stud and within flange 19. on the stud. 2o section on line 0f' Fig. 1.Y and ShOWng :in` lis a cup-like member 23 having an aperture 24 ldotted lines the-full 'open4 position of certain /inits bottom wall through which the ,stud 20 vane members; v projects. Between the rim of member 23 and the Fig. 5 is a view in end elevation and in section under face of flange 19 is held the periphery of a 100 on the line 5-5 0f Fig- 2: strainer element 25, preferably a screen of fine Figs. 6, and 8 are detail sectional views on wire mesh, which surrounds the stud 20. The

thelhe .'r-r 0f Fg- 2, ShOWng the relativ D0 element 25 and member 23 are clamped tightly in sitions of certain ports and passageways during position against flange 19 by a cap nut 26 thread- Opelatn; ed on the free end of stud 20. The member 23 105 Fig. 9 is a detail View in Yvertical central sechas a fuel inlet 27 through the bore of an extertion of a modification of my invention, and nally threaded nipple 28 for connection of the Figs. l0, 1l and 12 are horizontal group, detail carburetor to a source of fuel supply. Threaded views on the lines 10-10, 11-11 and l2-12, reinto the top of sleeve 17 is a valve guide and seat i5 spectively, of Fig. 9, each horizontal row or group member 29 having a vertical bore 30 therethrough llo collar member 35 secured thereon and engaged by the arms ofta yoke 36 carried by the end of a float -lever 37 lwhich is pivotally supported on a `pin 38 extending between and secured in apertures in bracket 16 and wall 5 see Figs. 1 and 2).

.8, 9 (Figs. 1 and 2)'.

Secured rigidly on the free end of lever 37 is a oat 39 for controlling the valve 33 and the admission of fuel to the reservoir 15. A coverplate or member 40-over1ies and closes the reservoir, and is 'preferably secured tothe `member 2 by

screws

41, 41". In order to maintain air at atmospheric pressure overlthe liquid in thereservoir, the cover member 40 is provided with an' air inlet 40"I formed by indenting the under sidef of said cover member/ to form a passage. over the edge of the wall 9.

I will now describe means for admitting and controlling the main supply of air and fuel to form the main charge or mixture to `be supplied by the carburetor: Extending between walls 8, 9 and adjacent and substantially parallel to front wall 5, is a shaft 42 having its opposite ends supported in' bearing recesses 43 in the top faces of walls 8, 9. Adjacent and substantially paral-4 lel to the rear wall 6` is a shaft 44 which extends between and has its opposite ends supported in bearing recesses in the top ,faces ofwalls Journalled on

shafts

42, 44 are the/

hub portions

46, 47, respectively, of vane oi' air

ow control members

48, 49, which .are substantially rectangular' in plan outline.

The

members

48, 49 have

head portions

50, 51 which are substantially rectangular andwhich meet substantially in the ve tical plane through the longitudinal center line f passage 11. Joining the head portions and the .hub portions of

members

48, 49 are plate portions 52, 53,v respectively, the under surlaces of which are inclined upwardly from the horizontal at substantially forty-live degrees, when members l48, 49 are in closed position (Fig. 4). Seated ori the top faces of

walls

5, 6, 8 and 9 is a plate member 54 which overlies and'closes the `recesses 43, 45A and` serves as a top bearing face for the ends of the

shafts

42, 44 ,and to retain the shafts in position. Through the members 54 is' a substantially; rectangular opening 55 which from front Ato rear is substantially equal to the distance between

Walls

5 and 6 and from side to side issubstantially equal to but slightly greater than the

width bf members

48, 49, so that the

members

48, 49 project movably therethrough. From member 54 at the sides of the opening 55 and adjacent walls 8, 9, rise substantially parallel guide plate mem' bers 56, 57-, respectively, which are spacedapart a distance substantially equal to' but slightly -greater than the width o f

vanes

48, 49, and which terminate at` a height substantially equal to the length of said vanes when the latter are in full open position, as shownV in' dotted lines (in Fig. 4. On the inside faces ofthe

members

56, 57 are deector members' 58,- 59, respectively, which 'lie under the vane members 48, 49 (see Figs. 2 and 4) andlwhich are inclinedjupwardly toward each other from the bottom edge of the opening55, the inclination ofmember 58 being preferably about twenty degrees and of member 59 about ten degrees. The side edges of each of

members

58, 59 are inclined upwardly toward each other substantially parallel to the under faces of the

vane members

48, 49 when the

members

48, 49 are in closed position. In the meeting faces of the head portions 50, 51y of the vanes; midway between

members

56, 57 are VerticaLsbmi-cylindrical, oppositely positioned recesses 60, 61, which cooperate when

portions

50, 51 are in engagement, to provide a cylindrical aperture 62 therethrough. In the air inlet chamber 10 and substantially concentric with aperture 62, is a sleeve member 63 which rises vertically from the bottom wall 4 substantially to the height of the chamber 10 -(see Fig. 2). Vertically through the sleeve mem. ber 63, Wall 4 and a bossy 64 depending from wall 4, is a cylindrical bore 65 which is concentric with aperture 62, substantially the top third of said bore being-of reduced diameter, as at 66, toserve as a guideway and toprovide a downward facing annularl shoulder 67 forming the top wall of va dash-pot chamber 68. Extending between wall 9 and sleeve member 63 is a horizontal boss` 69, and through the Wall 9, boss 69, and the wall of sleeve member 63, isa fuel supply conduit 70A which opens at one endinto the reservoir 1 5 and at its other end into the bore 65 beneath the' dash-pot chamber 68. Irthe chamber. 68 is a piston 71 of slightly less diameter than the diameter of chamber 68 to provide for a flow clearance around the piston. Rigid with said piston and extending upward centi-ally therefrom,is a

rod 72 which extends above sleeve member 63,

as at 73, and is of a diameter substantially equal to the diameter of "the\sleeve guideway portion 66, but which has a free sliding t therein. Longitudinally through the`piston` 71 and rod 72 is `a fuel feed passageway 74. `.On the portion 73 of rod 72 and movable therewith, is secured a nozzlemember 75 having a depending skirt o r flange 76 surrounding the guideway portionl66 and in\ which is a circumferential recess 77. 'Extending from `the under. faces of the vane members 48, ,I

49 are arm or lever members 78 which incline downward at an angle of substantially twentytwo and one-half degrees to the horizontal, andl 4the free ends of which seat loosely at substantially opposite points in the recess 77 to forman operati've connection between the vanes and said nozzle 75, The-nozz1e 75 extends upward intoap" erture 62 ywith a diametral clearance, preferablyof about one-sixteenth of an inch, so as to provide an annulark air ow space 78 there-- connected with passageway 74 by a bore or'pas- -1 sage 80 coaxial therewith and forming the main fuel jet. The member 75 may also beprovided with one for more air bleed ports 81 which .open from beneath. the vane members into the cup or recess 79 adjacent bore 80. Within the dashpot chamber 68- is`a spring 82;l preferably of the coil type, which-surrounds rod member 72 and which is heldunder compression between shoulder- 67. and piston 71 to aid the piston 71 in resisting opening movement of

vane members

48, 49 and lifting of nozzle 75, and also to return the 1 vanesfandnoz'zle towardlower position. Thread,- ed into the bore 65 in boss .64', 'is'the upper end of hollow guide member-88 having'a transverse; upper end wall 84 vvthrough which is an aperture l 85 concentricl with piston passageway 74. Ad#

. justably threaded-into member 83, as at 86, is a.

valve stem'y 87 which depends below member 83, and has a hand grip member` 88 for manualad- I justment of the s tem 87. In the top` end of stem 87 is a cylindrical recess 89 in which is seated for lateral and longitudinal play,'thefflanged end 90 of a tapered metering pin 91 which extends upward loosely through aperture 85 and into passageway 74 for'cooperation therewith to determine the size of the main'fuel inlet. 'Ihe pin 91 is secured to the stem 87 by an annular member 92 which overlies the periphery of the flange 90 and which is fixed to the stem-for example, by staking or crimping the stem over onto the member 92. The member 8311s enlarged belowy the threaded portion' 86 to provide anpannular packing recess 93 aroundstem 87, and in which is packing 94. A packing nut or gland 95 threadedv into member 83 and\surrounding stem 87, serves to maintain packing 94 tightly'in position, The gland 95 is preferably provided with a lock nut 96.

The throttle body member 3 seats upon the plate member 54, and at its lower end is substantially rectangular in horizontaly section, as at 97, merging above the tops of guide members 56, 5'? into a hollow cylindrical portion, as at 98.

The members Zand 3 are rigidly securedftogether with the plate member 54 clamped therebetween, preferablyby meansof bolts 99, or the like, passed through flanges 100 projecting

from'walls

5, 6 and through member 54 and threaded into overlying flanges 101 projecting from member 3. Within the portion 98 is a 110W control member or throttle valve 102, preferably of the butterfly type, carried rigidly-pn a shaft 103 journaled at dametrically opposite points in the wall of por- 'tion 98 and having its axis preferably in the vertical plane through the longitudinal center line of passage 11. One end, as 104', of shaft 103 projects through thewall of portion 98 and extends over the reservoir 15. The space within member 3 below valve 102 and above

members

48, 49, constitutes a vmixing chamber. 105, and above the valve 102 is .the outlet 106 for the mixing chamber or carburetor, and in which is a series of continuous, parallel, circumferential grooves 107 which aid in homogenizing the mix ture passing from the` outlet 106.

The foregoing describes the invention' so far as it relates to the main fuel and air provisions for forming an explosive mixture in.` the mixing chamber of the carburetor. I will ,now describe `the invention so far as it relatesfto certain means for cooperation with the structure above described, in order tofprovide a proper explosive charge required for proper operation of an engine under certain conditions, for` example, starting, warming-up, acceleration, and high power demands, etc.: I 1L Positioned over the space between bracket 16 and wall 6, is a valve casing member 108 having a vertical, Substantially cylindrical bore 109 therethrough. The casing 108 ,is preferably formed integral with the throttle body 3,*being secured thereto' by conduit .memberspllg' 111. The member 110 (see Fig. 2) extends between' the lower end ofcasing 108 and throttle body portion 98, and\has a substantially horizontal bore 112 therethrough which opens at one end into casing bore 109, and at its other end 'into the mixing chamber 105 anterior of. the throttle, and having its longitudinal axis substantially coincident with the line of centers of bore 109'and the` mixing chamber. Within the bore 112 is secured a nozzle member 113 which projects into the mixing chamber 105 and has a horizontal` dischargepassage 114. 'I'he member 111 extends 116 of member 111. The'b'ore 116 is upwardlyv and rearwardly inclined and opens into the outlet 106 above or posterior of the throttle- 102, as at 11'?. The passage 115 and bore 116 together comprise the upperportion .of the carburetor priming or starting passage.

Concentric with bore 109. is a circular aper-` ture 118 (see Figj) th'rough the cover 40, and positioned in said apertureis a-sleeve member 119 having at its top a circumferential supporting flange 120 resting upon cover 40. The pe' riphery of. flange 120 is notched,"as at 121 (see Fig. l), for cooperation with cover member retaining `screw 4'1at to prevent rotation of memben 119. 'I'he member 119 depends into reservoir 15 toa point below the normal fuel level, which is indicated by line L-L. n lFitted in the casing bore 109is the upper end of a hollow, open-ended, cylindrical casing or'housing member 122 which projects slightly above casing 108, as at 123, and which extends downward through sleeve member 119 substantially to the bottom wall 4 of the float chamber. The member 122 is held against vertical movement by a set'screw 1228, threaded through member 108. and Aseated at its inner end in a circumferential groove 124 in member 122 to permit free rotation of member 122 in the bore 109, so that the portion of member 122 within `bore 109 serves as a rotary valve, as will be presently set forth. Within housing member 122 and,

slightly below bore 112, is a transverse partition (see Fig. 6). Through the wall of chamber 126 isaalibrated port.l30 which isslightly larger than port 129 and is arranged to register with passage 112 upon A.clounterclccl'gwise rotation of member- 122 suiiicient to move passage 127 out of cut off'said. passage 1,28. Also through the wall of chamber 126 is a prlmingport 131 which,\upon .cqunterclockwis rotation of `member 122\sui. cient to carry port 130 out of communication with bore 112, will register with priming passage 115.

-The top of chamber 126 is sealed by a plunger valve member 132 which upon downward move` A ment covers and cuts olf the port127 and admission of air to chamber 126 .through said port. On memberu132 which projects above member v122, is a gear rack 133, and xed by a set screw 134 on the'projecting end 104 'of the throttle shaft, is a pinion member 135 having gear teeth' 136 meshing with said rack, .so that rotation of the throttley shaft in moving the throttle toward register with air inlet passage 128 and thereby open and closed positions will reciprocate valve member'132. On the ycircumference of the member 135 is a lug or projection 1 3? throughwhch is an internally threaded .aperture 138 having its axis transverse to throttle shaft 103, and

being, when the throttle valveisA closed, substantially horizontal and in the plane of the housing projecting portion 123, 'as' 'shown in Fig. 5. A

4 I. part of the periphery of portion 123 is formed with a flat face 139 which, when the housing member 122 is in normal position and throttle valve 102" closed, is in line with aperture 138,

the face 139 constituting a cam, yfor a purpose to be presently described. Adjustably threaded in aperture 138 and projecting therefrom-into substantial contact with the at fae 139 when the throttle valve 102 is closed, is apin 140, so

located that upon rotation of housing member 122 the face 139 willengage pin 140, and by a cam action therewith rotate throttle shaft 103 to move the-throttle valve 102 toward open position. An operating member, preferably in the form of a ring141, surrounds andv is lfixed to housing'member 122 and rests upon sleeve flange `120, and by means of which, member 122 may be rotated manually. Surrounding member 122 between casing member 108 and ring 141, is a coil spring 142 which is under compression and serves to hom the ring 141 against aange 12o. Projecting from the ring 141 are stop

arms

143, 144 which ,cooperate with .a stop, preferably one of the coverscrews, designated 41, to limit rotation of member 122. -When arm 143 engages the stop 141 (Fig. 6), the member 122 is in normal position, and when arm 144 engages said i tion 125 and extending downward in member 122 to la point belowthe normal fuel level in'the float chamber. VLngitudinally through =the member "face of partit'on4 125 substantially at the` time 'downward trav gro . respectively,

the normal 145 is a conduit 147 open at its lower end and communicating atits up'per end adjacent metriber 132 througndischarge `ports 148 with said bhamber 126, and in the wall of member 145 is a calibrated aperture 149 which is` normally housed within and closed by partitionv125, but

which is so positioned as to pass below the bottom l of the valv`e`member 132-closes air inlety port 127. lAlso through the wall of member 145 is an air bleed hole .150 which normally opens into chamber 126 but which is so positioned that it starts to move into aperture y146 a.s member 132 cuts on port 127. Through the sleeve member 119 and member 122 within chamber y15, and above the-normal fuelulevel in the float chamber areair inlet ports 151, 152, which register withI each other when rotary housing member I122 is in the normal running position of Figs. 5 and 6, i. e., when port 1291s' in register with passageiiz, but which Vare of such size in a horizontalplane as'to be out of register whenr'iortA 130 registers with pasmember-119 is of enlarged internal diameterto its bottom end, as at 153, to provide an annular fuel conduit from reservoir 15.- Through -the wall Vof rotary membe'r122 above the' normal fuel level, is'fafiielinletport'154 which opens from the conduit 15'3v into theinterior of'member 122.y The lower portion of member 122 which extends below fuel level in'thefloat chamberxis of enlarged internal diameter to provide a pump Ychamber 155 having its upper end wall dened by a downward facing annular shoulder 156, land being closed at lower end by a .closure member,

preferably in the form of a plug 157 threaded i into member 122. The lower endl of tubular member 145 ifs of reduced external diameter to provide a downward facing annular shoulder 158 substantially in the plane of shoulder 156 when the throttle valve is closed. Within chamber 1,55 is a pump piston 159 having a depending circumferential iiange 160 and a. central aperture 161 into which the reduced end of member 145 ex-v tends such that 'shoulder 158 engages the top face of th'e piston. Between plug 157 and piston 159 is a coil spring 162 normally urging piston 159 upward against

shoulders

156 and 158. Through the plug 157 is a calibrated port 163 coaxial with passage 147.l In the top of plug 157 'concentric with port 163, is a cylindrical recess providing an annular valve seat 164 with which cooperates a disk member 165 serving as a check yalve to prevent flow from chamber 155 to reservoir 15. The member or Valve 165 is retained in its recess by a spider or the like 166, preferably secured in position by staking the plug 157 over onto the same, as at 167. The bottom wall 4 may be provided with a dirt collectngvchamber 168 positioned beneath member 122 and having a clean-out aperture 169 closed and sealed by a plug 170 threaded or otherwise secured therein.

On the end 104 of throttle shaft 103 beyond pinion 135, is an' operating member 171 having a' socket therein coaxial with shaft 103l to receive a drive shaft 172 having'a radial key or lug 173 which extends into a radial slot 174 in member 171. On the member 171 is an arm 175 which engages a stop lug 176 on the member 3 to limit opening movement' of 4the throttle valve. Also on member 171 is an arm 177 having an adjustment screw 178 which cooperates with casingY member 108 Yto abutthe same to limit closingy movement of the throttle valve.

The operation of the carburetor of Figs; 1 to 8, inclusive, when the outlet 106has been connected to the cylinder inlets of an internal com bustion engine and reservoir/,15 has been connected at inlet 27 to a source of fuel supply, is

as follows: The engine being at rest, and it being desired to start the same, the ignition is turned on vandthe lever 144 is moved manually from 'its 'normal running position, Fig. 6, by counter-elo kwise rotation to the straining ppsition of Figc when it will abut the cover-retaining and st op screw ,413. This movement will rotate housing member 122, causing the cam face 139'to' engage pin 140 and rotate the throttle vvalve 102 toward open position, corresponding to level road car'speed of substantially fifteen miles per hour. mentioned, closes ports 129, by carrying them out of communication with the nozzle discharge passage 114 and also closes air inlet port 127 by carrying yit out of communication with air inlet 128. fThe said rotation of member 122,` howL ever, places priming or starting port 131'in regtry with priming

passage

115, 116 to place port 117 in outlet 106 above the throttleA valve, indirectcommunication with'the fuel reservoir 15 via passage- 116, 115, port l131, chamber 126, ports `148 conduit 147, chamber 155, and calibrated port 163. If the engine be now turned over, solid liquid 'fuel will be drawn fromreservoir 15 through port 117 to mix in outlet passage 106 with such air as can pass the throttle valve 102 when the same is in starting position. The

fuel mixture thus supplied to the engine is exl ceedingly rich and constitutes a priming or starting charge. VIf desiredfthe fuel supplied for start- Rotation of 'member 122, as just t30- ing to the outlet 106 from port 117 by suction, may be substantially augmented by rapidly opening and closing the throttle 102, which results in the pump piston 159 forcing solid liquid yfuel from the pump chamber 155 up through conduit 147 and port 117 to outlet 106. As the throttle is opened, air entering chamber from inlet 11 Y(at atmospheric pressure will separate the

vane members

48, 49 swinging them upward and out-f 'ward from eachother on their

shafts

42, 44 toward their full open position, indicated`by dotted lines in Fig. 4. The air passing between the'

Vane members

48, 49 is directed by the inclined under faces of the Vane members and by the deflector members 58,Y 59toward the ,discharge point from the main fuel nozzle 75.

vThe vane members

48, 49 will be opened proportionally to the difference in pressure between

chambers

10 and 105, and the movement of the members' `48, 49 acts through lever arms 78 upony nozzle member 75 to simultaneously lift member to maintain the point of discharge therefrom substantially in the plane of least flow area between

chambers

10 and 105, i. e., substantially in the planel of the top edges of

members

48, 49, so that the fuel in the nozzle member will be maintaineduin the `plane of greatest air velocity and of maximum aspirating effect. The rate of opening and clos- -ing of

Vane members

48, 49 is controlledby the piston 71 and spring 82 in the dash-pot 68 so as to prevent chattering of the vane members at low engine speeds. As the vane members open and close, they raise and lower nozzle 75 and piston 71 with respect to metering pin 91 to control thereby the size of the main fuel inlet to passage 74 and to automatically increase the fuel fed to the main jet and the mixing chamber las the supply of air to the mixing chamber is increased.` The tapered metering pin 91 after initial manual adjustment, is held in fixed vertical positionl during operation of the carburetor. Should it be desired during extremely cold weather conditions, and as soon as the engine' is running, to place a load on the engine or drive lche car, then as the throttle valve is moved beyond one-third full open position; pinion 135 will act on rack 133 and piston 125 to carry port 149 below partition 125, and since port 151 is out of communication with port 152, additional fuel will be drawn from reservoir 15 through annular passage 153 in sleeve 119, port 154, the bore of memberZ2 122 and port 149, into the conduit 147 and thence with the normal priming or starting charge into outlet 106.

As the engine warms up, the lever 144, which controlsI the quality of the mixture,j is manually returned to the-intermediate position of Fig. 7 which cuts off the priming port 117 from chamber 126 and places port 130 in communication with nozzle discharge passage 114 while air inlet port 127 to chamber 126 is still closed, being out of register with air inlet port 128. When the lever 144 is returned to the position of Fig. 7. cam139 will permit the throttle valve 102 to return partially toward idling position, but not so` just described, the sub-atmospheric pressure in mixing chamber 105, and the atmospheric pres- .sure maintained over the fuel in reservoir 15 by air" inlet port 40a, will cause liquid fuel to pass from the reservoir l5 through calibrated port 163, conduit 147, ports 148, chamber 126, port 130 and.y

passage 114 into the mixing chamber 105. This v liquid fuel from passage 114 is supplemental to ber 126 to air inlet 128 through registering port that from the main jet 80, and increases the richness of the mixture supplied by the main air and fuel inlets to provide a proper mixture when desired-for warming up the engine. As the engine further warms up, the lever 144-is gradually returned manually-to normal running position (Fig. 6) when' stop lug 143 engages screw 4l, thus bringing Iport 129 into, communication with the nozzle discharge` passage`114 and opening cham- 127. When housing member 122 is gradually rotated by llever 144 from theposition of Fig. 7 to that of Fig. 6, then as' port 127 begins to admit air to chamber 126, there will be a discharge of air and fuel through passage 114, which continues until port 127 has been rotated far enough to f admit sufficient air to chamber 126 to satisfy the mixing chamber suctiony at port 129. When the engine has been warmed up and housing member 122 returned from the position of Fig. 7 to the position of Figs. 5 and 6, the mixture of air and liquid fuel Lfor normal running will vbe supplied only from the main air inlet 11 and the main fuel J'et 80, but some economizing air will enter the mixing chamber directly through passages 114 10 froml chamber 126. When the throttle valve 102 is gradually dopened, the registering

ports

127, 128 will be gradually cut off by downward movement. of plunger valve 132 and will be closed completely at substantially one-third open position of the 105i throttle valve corresponding to about sixty miles per hour level road car speed. As the flow area of registering ports`127, 128 is cut down by valve 132, so that air supplied to chamber 126 will no longer satisfy the suction at port 129, thenfuel n will be drawn from the reservoir 15 through conduit 147 to mix in chamber 126 with some

air entering ports

127, 128 and pass therewith through passage 114 to enrich the mixture from the main air and fuel inlets. been closed completely by valve 132, port 149 will have passed below partition and air passing through ports 151, 152 from the reservoir will enter port 149 and 'conduit 147 to pass, with fuel drawn up conduit 147 from the reservoir, into'120 chamber 126 asl an emulsion, and thence into the mixing chamber 105 through passage 114 to provide a supplemental fuel jet to enrich the mixture from'the main air and fuel inlets to supply aA proper mixture for maximum power demands.

The air inlet port 149 is provided to decrease the with air from

ports

127, 128 through. passage 114 135 into the mixing chamber to'supplement the main mixtureitoprovide the desired rich mixture for acceleration. 'Ihe check valve 165 prevents any back-flow through port 163 from chamber 155 into the reservoir 15 and causes all the fuel displaced 140 by piston 159 to pass up conduit 147. The fuel from chamber 126 passes to the mixing'chamber 105 through passage 114 and nozzle 113` substantially instantaneouslyfdue to the air at atmospheric pressure supplied from ports k127, ,128. 145

After discharge of the displaced fuel from chamber 126, no additional fuel will feedl from nozzle 113,. but economizing air will again pass f therethrough to the mixing chamber. Upon sudden opening of the throttle valve 102 beyond sub- 150 When ports127, 128 have 115 stantially one-third full open position, or sufils of portsf as it is evident that other size combiciently to cut off ports-127, 128, an accelerating charge of liquid fuel will be expelled from beneath piston 159 up tube 147 into chamber 126, check valve 165 preventing back 'flow into the reservoir 15. The liquid fuel forced into chamber 126 passes as a solid slug through passage 114 to the mixing chamber, due to the substantially instansure of theuel in conduit 147 prevents entrance of air through port 149. This initial discharge of liquid fuel is followed) instantaneously by an emulsion of liquid fuel from the reservoir 15 and air entering conduit A147 through port 149, which emulsion is constant in quantity per unit of time, and which supplies sufficient additional fuel to the mixture from the main inlets to provide maximum Power.

A l The air bleed 150 is provided to prevent retention of fuel in chamber 126 should the throttle valve be returned toward closed position just sufficiently to closeport 149 without.

opening ports `1/2'1, 128. Since 'port 150 is above i partition 125v as port 149 closes,

ports

127, 128

remaining closed, air entering the closing `port 149 will pass through conduit 147 'and issue from The carburetor illustrated in Figs. 9, 10, 11 an l 12 is substantially like that of Figs. 1 to 8 inclusive, but .certain details of the structure have -been modified slightly. The sleeve member 119 has been omitted and also the fuel inlet 154 to the interior ofhousing member 122, so that in this carburetor the additional supply of fuel,.to conduit 14'1 throughport 149 has been eliminated. The air inlet port` 152v for supplying air to the air 'bleed port 149 has been placed above the float chamber and registers in the normal position of )housing member 122 with a port 180 in casing 108. The priming passage 116 has been positioned substantiallyin the vertical plane of and above the 4nozzle member 113, and therefore opens directly intothe bore 109, thus eliminating passage 115. 'I'he port 131 while maintaining its relative circumferential position to the other ports in cas-.4

ing 122, has been placed substantially in the plane of air inlet port 127 for movement into and out of registry with passage 116. The ports 129,

` 13o instead of being m the same, hbrizonm piane have been spaced lyertically so that the port 130 cooperategwithfa.separate passage 179 which is above and in the vertical plane of nozzle member 113, and which opens from bore 109 into the mixing chamber 105. The port 129 registers, asain Figs. 1 `to 8, in normal position of member 122 with the nozzle bore -114, but the member 113 has a calibrated discharge port 181. In Figs. 10, 11 and 12 are shown certain operative positions of member -122 and of the discharge ports from chamber 126, the detail sectional views in the right-hand column illustrating the positions of "the ports for normal running; those in the middle column illustrating the positions of the ports upon partial clockwise rotation of member 122, and being the position for lwarming up ,the engine; and

isfactory, but Ido notlimitmyselfto such sizes nations will also beoperative:

Figs. 1 to 8 Figs. 9 to i2 Main fuel iet .085 -.0865 .070 Air inlet port... 127 .0937-.125 .0937 Power port 129 .070' .0937 Warming-up por 130 .0937 .0625-.078 Primlng port 131 .125 .0937 Port 149 .0595 .043 Pump inlet.. 163 .D98 .098 Air inlet. 152 .1875 .0937 Main jet bleed B1 052 Fuel inlet.- 154 ,125 Air bleed 150 .'040

What I claim and desire to secure. by Letters Patent of the United States is:

l. A carburetor of the character described, comprising a body member having a mixing chamber therein, an air vinlet to said chamber, a vane member normally restricting the passage of air from said inlet to said chamber, said vane 'member being supported for swinging movement to openV communication between'said inlet and lsaid chamber, a-movable fuel nozzle discharging longitudinally into Saidchamber and having'its point of discharge substantially at the `free edgel of said vane member when said member is in passage restrictingposition, means interconnecting said vane member and said nozzle to cause substantially simultaneous vmovement of said nozzle and said vane member whereby the point of discharge from said nozzle ismaintained substantially in the plane of maximum air flow velocity,

and means fixed in said air inlet to deflect air entering said chamber toward the point of discharge from said nozzle.

2. A carburetor of the character described, comprising a body member having a mixing chamber therein, an air inlet opening into said chamber, oppositely positioned vane members supported adjacent the sides of said chamber for swinging movement, said vane members normalv ly engaging each other at their free edges and being 'movable into parting relation to control ow of air from said inlet to said chamber, par- `allel spaced guide members extending between and laterally engaging the side edges o f said oppositely positioned vane members, said vane members having 4an opening therethrough, a reciprocably supported-fuel nozzle positioned within said air inlet and terminating in said lastnamed opening, means to move said nozzle upon swinging movement of said vanemembers whereby the point of discharge from 'said nozzle is maintained substantially' in the plane of minimum flow area between said inlet and said chamber,` andy means in said air inlet projecting laterally from said guide members on the inlet side of said vane members-to direct lair flow toward said nozzle.

3. A carburetor of the character described,

comprising a body member having `a mixing chamber therein, substantially parallel spaced .guide members in said chamber, an air inlet opening into saidchamber, vane members posiinlet and said chamber, said vane members hav- 'Y ing an opening therethrough at their free edges,

a reciprocable fuel nozzle in said air inlet and, f

terminating in said last-named opening, said nozzle having a discharge port concentric with' said mixing chamber, one of said guide members I having means to deflect air toward said nozzle, and means interconnecting said vane members and said nozzle for substantially simultaneous movement thereof whereby the point of discharge from said nozzle w'ilLbe maintained substantially in the plane of maximum air flow velocity. j, y

4. A carburetor for supplying a` mixture of fuel and air to an internal combustion engine, comprising a body member having'a mixture passageway, main air and fuel inlets to said passaigeway, an outlet from said passageway, means to control now through said passageway, a supplemental fuel supply conduit communicating at one end with a source of fuel supply and at its other end opening into said passageway, an air inletto said conduit normally operative to supply air tosatisfy the passageway suction on said conduit to prevent flow of fuel from said supplemental conduit, a valve operable to regulate said second air inlet whereby the suction in said i, passageway can/draw fuel through said conduit,

means actuated with said control means for transmitting movement to and for operating said I valve whereby the supply of fuel from said conduit is determined in accordance with the position of said control means, and a second valve controlling said second air inlet and operable independently of said first-named valve whereby to control the supply of fuel from said conduit independently ofthe position of'said control means and in accordance with the needs of the engine.

E. A carburetor of the character described, comprising air inlet member having an air inlet chamber and an air inlet tojsaid chamber, said member having an opening in its wall from said chamber, a throttle body member secured to said air inlet member and'having a mixingchamber therein having an open side communicating with said opening, a plate member having anaperture therethrough and being clamped between said members,I substantially parallel guide members in said mixing chamber and projecting from said plate member, inclined vane members positioned transversely between saidv guide members, said vane members being supported by said base member for swinging movement and normally engaging each other at their free edges and having their side edges/cooperating with said guide members to restrict flow from said air chamber to said mixing chamber, a tubular guide `means positioned in said air chamber and includinga dash-pot chamber, a fuel nozzle supported by said guide means for reciprocation and having a piston in said dash-pot chamber, and means on said vane members engaging said`- nozzle whereby swinging movement of said 'vane members will move said nozzle.

6, A carburetor of the character described, comprising a body member .having a mixing chamber, main air and fuel inlets tojsaid chamber, an outlet from'said chamber, means to control said outlet, aA casingfmember having a cylindrical bore, a valve member having a fluid chamb er and being' rotatable in said bore, means to supply fuel `to said fluid chamber, a conduit communicating with said bore and with said mixing chamber, an air inlet to said bore, a plurality of l ports 1n said valve member, certain of said ports registering substantially simultaneously with saidsecond air inlet and with said conduit, another of said .ports registering with said conduit when said second air inletis closed by'said Valve member, and a piston valve in said fluid chamber operatively connected to said control means and movable thereby to regulate said second air inlet.`

7. A carburetor of the character described," comprising, a body kmember havingy a mixing chamber, main air and vfuel-inlets to said chamber, an outlet from said chamber, means to control said outlet, a casing member having a cylindrical bore, a valve member having a fluid chamber and being rotatable in said bore, means to supply fuel to said iiuid chamber, a conduit communicating with said bore and with said mixing chamber, an air inlet to said bore, a pluralityy of ports in said valve member, certain of said ports registering substantially simultaneously with said second air inlet and with said conduit, another of said ports registering with said conduit when said second air inlet is closed by said valve member, a piston valve in said fluid chamber operatively connected to said control means and movable thereby to regulate said second air inlet,

Iand means operable by said valve memberto regulate said control Xmeans.

8. A carburetor ofV the character described,

.comprising a body member having a mixing chamber, main air and fuel inlets to said chamber, .an outlet from said chamber, a pump chamber having a fuel inlet, la piston in said 'pump chamber, a casing having a fluid chamber having communication with,said mixing chamber, said piston having la piston rod projecting into said fiuid chamber, a conduit extending through said piston and rod from said pump chamber to said fluid chamber whereby the fuel compressed .beneath said piston will pass through said piston and rod, the wall of said casing having an air inlet p'ort'to said fluid chamber normally operable to supply sufficient air to satisfy the mixing chamber suction thereon, and valve means carriedl by said rod to4 control said air port.

9L A carburetor of the character described,

comprising a body having a mixing chamber, main air and fuel inlets to said chamber, an outlet from said chamber, a throttle valve in said outlet, a fluid chamber, means to supply fuel to said iiuid chamber, a conduit leading from said fluid chamber and discharging into said mixing chamber on the inlet side of said throttle valve, a second conduit leading from said iiuid chamber and discharging into said outlet beyond said throttle valve, means to control fiow through said conduits, an air inlet port to said fluid chamber normally operable to supply air to satisfy the mixing chamber suction thereon, and means operable by said throttle valve to regulate said air port whereby the mixing chamber suction Will draw fuel from said fluid chamber' into said mixing 'chamber to supplement the fuel from said main fuel inlet.

10. A carburetor of the character described, comprising a body member having a mixing chamber, main air and fuel inlets to said chamber, an outlet from said chamber, amember having a cylindrical bore, a valve rotatable in said Vbore and having a fluid chamber, a fuel supply conduit leadingr from said bore to said mixing chamber, a fuel supply conduit leading from said bore to said outlet, yan air inlet conduit to said bore, portsin said valve member registerable with said conduits for placing said conduits in communication with said fluid chamber, and means to supply fuel to said fluid chamber.

l1. A carburetor of the character described, comprising a body, member having a mixing chamber, main air and fuel inlets to said chaml' to supply fuel to said iluid chamber, .and means to control the port registering with said air inlet to control thereby the degree of air pressure in said iiuid chamber.

12. A carburetor'of the character described,

comprising -a body member having `a mixing chamber, main air and vfuel inlets to said chamber, an outlet fromsaid chamber, control means for said mtlet, a pump chamber, a iiuid chamber, a` piston in said pump chamber, an

operating member for said piston, said operating member having a longitudinal bore opening at one end through said piston into said pump chamber and at its other end having communication with said -uid chamber, a conduit from said fluid chamber to said mixing chamber, va

priming'passage from said fluid chamber to said f outlet, means to supply-fuel to -said pump chamber, means to normally maintain substantially atmospheric pressure in said fluid chamber, and

`.. valve means to control said vlast-named means,

said conduit and said primingmassage.

13. A carburetor voi the character described, comprising a bodymember -having a mixing chamber, --main air and fuel inlets to ?said cham- 5( ber, an outlet from Said chamber, control means for said outlet, a pump-phamben-ailuid chamber, a piston in said pump chamber,- an operating member for'said piston, said, operating member having a longitudinal -here openingfia't one end' thigrugh said piston into' said pump chamber and z-'et'i other end having communication with .said tluid chamber, a conduit 'from saidj'ffiuid chamber to said-mixing cha-mber, a priming-passage from said fluid chamber to said outlet, means 'toy ,5 supply fuel to'said pump chamber, means to ndrmally maintain substantially atmospheric pressure in said iiuid chamber, valve means to control said last-named means, said conduit and said priming passage, and means operableby said control means to cause sub-atmospheric pressure "in saidgiuid chamber. f

14. A carburetor comprising a body having a mixing chamber and an outlet, main fuel and air inlets to said mixing chamber, a throttle controlling said outlet, a rotatable hollow valve member, a pump, chamberI substantially in line withl said valvemember, a piston in said pump chamber, `a reciprocable hollow piston rod carrying said piston and opening at its opposite ends `into said hollowgvalvegmember and'said pump'` chamber, a port supplying liquid -fuel to said pump chamber, passages leadingrespectively from saidr hollow valve memberv to said mixing chamber and to saidfoutlet, said valve member having ports adapted upon rotation of said member to alternately connectsaid passages with said valve member, and means operable byopening movement of the throttleto cause said piston to expel liquid fuel from said pump chamber' through said hollow piston rod intogsaid hollow valve member.

f 15. A carburetor'fcomprising a body having-a member, a pump chamber substantially in line with said valve member, a piston in said plumpl chamber, a reciprocable hollow piston rod carrying said ypiston and opening at its opposite ends into said hollow valve memberand said pump chamber, a port supplying liquid fuel to said pump chamber, passages leading' respectively from sai'd hollow valve member to said mixing chamber and to said outlet, said valve member having ports adapted upon'rotation of said mem- `ber to alternately connect said passages with said valve'member, means operable by opening movement of the throttlel to cause said piston to expel Vliquid fuel from said pump chamber through said hollow piston rod into 'said hollow valve member, and an air supply port to said hollow valve member controlled by rotation of said valve member. 16. A carburetor comprising a body having a mixing chamber and an outlet, main fuel and air inlets to said mixing chamber, a throttle controlling said outlet, a rotatable hollow valve mem- \ber, a pump chambersubs'tantially in line with said valve member, a piston in said pump cham'- ber, a reciprocable hollow piston rod carrying said'piston and opening at its opposite ends into .saidhollow valve member and said pump c hamber,a portq'supplying -li'quid fuel to saidpump chamber. passagesleading respectively from said hollow valve'niember to said mixing chamber and to said-outlet, said valve member having ports adapted upon rotation of said member to alternately connect said passages y with said valve member, meansV operable by opening movement `of the throttle to cause said piston to expel liquid fuel from saidr pump chamber'through. said hollow piston rodinto said hollow valve member, an

air supply port'to said hollow valve member, and means operable by movement of the throttle to control vsaid 'air supply port.

17. A":earburetor comprising a body havinga 115 mixing chamber and an outlet, main. fuel and air inletsto said mixing chamber, a throttlecontrolling saidLoutlet, a rotatable hollow valve member, a pump `chambersubstantially in line with said valve member; a piston vin said pump chamber, `a^120 reciprocable hollow piston rod carrying said .pis-

tong-and -openingat its opposite ends into ,said

I hollow valve member and said .pump chamber, a y port supplying'liquid fuel to said pump chamber, passages leading respectively from said hollow valve member tosaid mixing chamber and tosaid outlet, said valve member having ports adapted upon rotation of'said member to alternately connect said passages-with said Valve member, means operable by4 opening movement of the throttle 131) to cause said/.piston tof-expel liquid fuel from said pump chamber through said hollow piston rod into saidhollow valve member, an admission port ,to said piston rodopened and closed by movement of the throttle in-moving said rod, and ports con- 135,

i 18.' A carburetor of the character described,

comprising avfbody member having a mixing chamber, main air and fuel inlets to said cham-14@ ber, an outlet from ysaid chamber, a casing car'- ried by said member and having a. substantially vertical cylindrical bore therethrough,I a conduit opening into said bore and communicating withv said chamber, a fuel reservoir, a sleeve member rotatably 'lxed in said bor'e anddepending into said reservoir, a substantially horizontal'apertured partition-in saidjsleeve member, a plug/ member closing the bottom end of said sleeve f member and having an aperture'therethrough for 15d lso . upon opening movement admitting f'uel from said'l reservoir, a piston in said sleeve member and having a piston rod extending upward through said partition aperture,

a passage extending through said piston and.

rod and opening into said sleeve above said partition, an air inlet to said bore, ports in said sleeve member registrable substantially simultaneously with said conduit and said second air inlet, means `carried by and movable with said rod and sealing the upper open end of said sleeve member and operable to regulate said second air inlet, and an aperture in said sleeve member registrable with said conduit when aid second air inlet is closed.

19. A carburetor comprising a body having a mixing chamber andV an outlet, main air and fuel inlets to said mixing chamber, a conduit for supplying fuel to said fuel inlet, a throttle controlling said outlet, a valve casing having a passage discharging into said chamber on the posterior side of the throttle and a passage discharging into said chamber on the anterior side of the throttle, a valve in said casing having aport cooperable with the first-named passage, said valve having a plurality of ports cooperable with the second-named passage, and lmeans .for feeding fuel to said valve for distributionl through said ports, said ports being so related to said passages that the first-named passage is closed when the valve is actuated to register either of the secondnamed ports with said second-named passage, and said second-named passage is closed when the first-named passage is in register with the firstnamed port.

20. A carburetor of the character described, comprising a body having a mixing chamber, air and fuel inlets to said chamber, an outlet from said chamber, control means for said outlet, v means to supply fuel to said outlet beyond said control means, means to control said second-l named means, and means operable by said'lastnamed means to regulate said outlet control means. v

21. A carburetor comprising a body having a lmixing chamber and an outlet, main air and fuel inlets to said chamber, a throttle controlling said outlet, a liquid fuel reservoir, a fuel feed duct leading from said reservoir to said outlet beyond the throttle, a valve controlling said feed duct, means for opening and closing said valve, and means on said valve and'operable to open the throttle when the valve is moved to open position. l' 22. A carburetor comprising a body having a mixing chamber and an outlet, main air and fuel inlets to said chamber, a throttle controlling said outlet, a liquid fuel reservoir, a fuelfeed duct leading from said reservoir to said outlet beyond the throttle, a valve controlling said feed duct, means for opening and closing 'said valve, and a cam mounted on said valve and operable thereby thereof to open the throttle. v Y

23. A carburetor comprising a body having' a mixing chamber and an outlet, main fuel and air inlets to said mixing chamber, a throttle controlling said outlet, a fuel supply reservoir, fuel feed ducts leading respectively from-said reservoir to the mixing chamber and to the -outlet beyond the close said ducts, and means operablein unison with said valve to open the throttle when the valve is operated to open the feed duct tol the outlet `discharging beyond the throttle.

24. A carburetor comprising abody having a mixing chamber and an outlet, mainfuel and'air rinlets to said mixing chamber, a throttle controlling said outlet, a throttle operating shaft carrying a projection, ra. liquid fuel reservoir, a fuel feed duct leading from said reservoir to said outlet beyond the throttle, a rotary valve controlling said duct, means for operating said valve, and a cam operable by opening movement of said valveto engage said projection to operate said shaft to open the throttle.

25. A.. carburetor comprising a body having a mixing chamber andan outlet, main fuel and air inlets to said mixing chamber, a throttle controlling said outlet, a. rotatable hollow valve member, a pump chamber, a piston in said pump chamber,

-a reciprocable hollow piston rod carrying said trolled by said valve member for admitting air to lsaid valve member when the passage to the mixing chamber is opened by operation of said valve member. n

26. A carburetor comprising a body having a mixing chamber and an outlet, main air and fuel inlets to said mixing chambena throttle controlling said outlet, a valve casing having a passage leading to the posterior side of the throttle and a passage leading to the anterior side of the throttle, a valvein said casing having a port cooperable with the first-named passage, said valve having a plurality of-ports cooperable with the second-named passage, means for feeding fuel to said valve for distribution through said ports, said ports being so related to said passages that the first-named port is out olf when the valve is actuated to register either of the second-named ports with said second-named passage, and said second-named passage is closed when the firstnamed passage is in register with the first-named port, and pump means for feeding fuel to certain of said ports.

27. A,carburetor comprising a body having a passage therethrough, a fuel supply conduit discharging into said passage, a throttle controlling now through said passage, a liquid fuel reservoir, a fuel feed'duct leading from said reservoir and discharging into said passage, a valve controlling said feed duet, means to open said valve, a cam operable upon opening movement of said valve, cooperable operating means between said cam and said .throttle for moving said throttle toward open position upon operation of said cam, and means for moving said throttle toward open position irrespective of the position of said cam.

' 28, 'A carburetor comprising a body having a passage therethrough, means to supply fuel to said passage, a throttle controlling said passage, a fuel supply reservoir, fuel feed ducts leading from said reservoir to longitudinally spaced points in said passage, valve means controlling said ducts. means for operating said valve means to alternately control said ducts to permit fuel discharge therethrough, cam ,means operable by said valve means, and cooperable operating means between means acting on saidl operating means when one of said ducts is dischargeable into said passage to move said throttle toward open position and acti Open.

ing when another of said ducts is dischargeable into said passage to move said throttle further 29. A carburetor of thecharacter described,

'comprisinga body member having a mixing chamber with a mixture outlet, main air and fuel in-J lets to said chamber, a priming fuel supply conduit opening into said outlet and connected to a source of fuel for discharging priming fuel into said outlet in response to engine suction, a normally closed valve in said conduit, means to control ow from said chamber to said outlet, and means operable by said control means to force fuel through said conduit into said outlet when said valve is open.

30. A carburetor of thelcharacter described, comprising a \body member having `a -mixing chamber with a. mixture outlet, main air and fuel inlets to said chambey, a conduit to supply supplemental fuel to said chamber, a normally closed conduit to supply priming fuel to said outlet, valve` means to contiol said first-named conduit and to open and close said second-named conduit, means to supply`economizing air to said chamber, means to control flow from saidachamber, and means operable by said fl'o'w control means to force fuel through one of said conduits and to regulate said air supply means. Y

31. A carburetor .of the character described, comprising a body member having a mixing chamber, main air and fuel inlets to said chamber, a throttle controlled outlet from said chamber, a pump chambenhaving a piston therein,

means to supply fuel to said pump chamber, a`

conduit between said, chambers, an air inlet port to said conduit normally operable to supply air to satisfy the mixing chamber suction thereon, means to regulate said air port to cause sub-at- .mospheric pressure in said conduit whereby the mixing chamber suction will draw fuel from said pump chamber, means connecting said lastnamed means and said piston, and throttle operi said valve member registerable with said conduits for placing said conduits in communication with said uid chamber, andl throttle operated means to supply fuel to said fluid chamber. f v

33. AA carburetor of the character described,

comprising a body member having a mixing chamber, main air and fuel inlets .to said 'chamber, a throttle controlledoutlet from lsaid chamber, a casing-member having a cylindrical bore,- a valve member rotatable in said bore and hav--l ing a iiuid chamber, a conduit leading from said bore to said mixing. chamber, a' conduit leading kfrom said bore to said outlet,*an air inlet 'l conduit to said bore, ports in said valve member registerable with said conduits for placing said conduits in communication with said u'idch'ambe'r, means to supply fuel to saidpuid chamber, means to control the port registering with air inlet,

and throttle controlled means to regulate the port registeringv with said air inlet, said second-named and said third-named means being operable to control the degree of air pressure in said fluid chamber.

second-named passage, means for feeding fuel to said valve for distribution'through said ports,

.said ports being so related to said passages that the first-named port is cut oi when the valve is actuated to register either of the second-named ports with said second-named passage, and said vmi second-named passage is closed when the first- *named passage is in register` with the first-named port, and throttle operated pump means forfeeding fuel to certain Aof said passages.

35. A carburetor of the character described, comprising a body member having a passageway therethrough with anair inlet, a vane member normally restricting the passage ofy air through said passageway, a reciprocably supported fuel nozzle discharging into said passageway, means interconnecting said vane member and said nozzle whereby movement of ysaidfvane member will move said nozzle-means operable in response t0' movement of said nozzle to regulate flow of fuel' therethrough, a' fuely reservoir connected to` said .nozzle to supply fuel thereto', a casingmember having a dash-pot chamber, said dash-pot chamber receiving liquid fuel from the supply to said nozzle, and a piston in said dash-pot chamber,

and connected to said nozzle for movement therewith and thereby, the piston in said dash-pot chamber drawing liquid fuel into and discharging liquid fuel from said Ydash pot chamber upon reciprocation of said nozzle whereby to regulate the movement of said nozzle.

36. A carburetor of the character describedy comprising a body member having a passageway therethrough with an air-inlet, a vanemember normally restricting the passage of air through said passageway, a reciprocably supported fuel nozzle discharging into said` passageway,l means interconnecting said vane memberand said nozzle whereby movement of said vane member will moveY said nozzle, means operable in response to movement of said nozzle to regulate flow of fuel therethrough, a fuel reservoir connected to said nozzle to supply fuel thereto, a casing member having a dash-lpot chamber, said dash-pot chamber receiving liquidv fuel from the supply `to said nozzle, a piston in said dash-pot chamber and connected by, the piston in said dash-pot chamber drawing liquid fuel into and discharging liquid fuel from` said dash-pot chamber upon reciprocation of said nozzle whereby to regulate the movement of said nozzle, andresilient means opposing movement of saidvane member toward passageway opening position. a? Y 37. A carburetor lof the character described, comprising a body member having a passageway therethrough with an air inlet, a vane member normally restricting the passage of air through 185` i, t0 Said nozzle for movement therewith and therev saidpassageway, a reciprocabl-ysupported fuel.'

nozzle discharging into lsaid passageway, means interconnecting said vane member and saidnozzle whereby movement of said vane member will move by, the piston in sai'cl dash-pot chamber drawing said nozzle, means operable in response to moveliquid fuel into and discharging liquid fuel from ment of said nozzle to regulate ow of fuel theresaid dash-pot chamber upon reciprocation of through, a. fuel reservoir connected to said nozzle said nozzle whereby to regulate the movement of to supply fuel thereto, a casing member having a said nozzle, and resilient means in said dash- 80 dash-pot chamber, said dash-pot chamber repot chamber opposing' movementl of said piston ceiving liquid fuel from the supply to said nozzle, in response to movement of said vane member a piston in said dash-pot chamber and connected toward passageway opening position.

to said nozzle for movement therewith and there- WALTER H. WEBER. 1,0 y

CERTIFICATE or CORRECTION.

Patent No. 1,981,483. v November 20. 1934.

WALTER H. WEBER,

It is Ihereby certified that error appears in the printed specificatioriof the. above .numbered patent requiring correction as follows: Page 4, line 124, for straining read starting; and page 5, line 100, for "passages" readvpasszige; and tharf'the said Letters Patent should be. read wth'these corrections therein that the samemay conform to the record of the case in the Patent Office.

Signed and sealed this 27th day of Augst, D. 1935.

Lesl ie Frazer (Seal) Acting Commissioner of Patents.

whereby movement of said vane member will move by, the piston in sai'cl dash-pot chamber drawing said nozzle, means operable in response to moveliquid fuel into and discharging liquid fuel from ment of said nozzle to regulate ow of fuel theresaid dash-pot chamber upon reciprocation of through, a. fuel reservoir connected to said nozzle said nozzle whereby to regulate the movement of to supply fuel thereto, a casing member having a said nozzle, and resilient means in said dash- 80 dash-pot chamber, said dash-pot chamber repot chamber opposing' movementl of said piston ceiving liquid fuel from the supply to said nozzle, in response to movement of said vane member a piston in said dash-pot chamber and connected toward passageway opening position.

to said nozzle for movement therewith and there- WALTER H. WEBER. 1,0 y

CERTIFICATE or CORRECTION.

Patent No. 1,981,483. v November 20. 1934.

WALTER H. WEBER,

Signed and sealed this 27th day of Augst, D. 1935.

Lesl ie Frazer (Seal) Acting Commissioner of Patents.