US1908432A - Carburetor air feed - Google Patents

Description

May 9, 1933. s. LONG 1,908,432

CARBURETOR AIR FEED Filed July 9, 1952 31a/vanto@ Seth LongF Patented May 9, 1933 UNITED STATES Param' Volg=1=1cr. "f

'SE-TH Lone, or*` SEATTLE, wasraruaron oARBURn'roB. A1B. FEED Application filed July 9, 1932. Serial N. 621,603.1'

shoulders', and also to provide a plurality of upwardly slanting holes through the conical body and a plurality of holes extending vertically through the cup flange together with a plurality of vertical yexterior grooves and holes extending radially and horizontally through the body whereby air is sucked through the holes and projected` into the stream of gasoline and air entering from the needle valve and the lower end of the body respectively and whereby the fuel and air are thoroughly mixed. Further objects areto provide a ring adapted'to normallyrest on the cup flange and to be lifted by the suctional force of' the engine to which the device is connected whereby passage of., air through the holes that are associated with therring is automatically regulated and controlled 'by the speed -and suctional force of the engine. Stillfurther '30 object-s are to provide the conical-body with a flared smaller, lower, end and to -so dispose said end around the needle fuel valve whereby air is drawn upward and around 4the fuel and whereby the amount of air entering said lower end is varied by the vertical movement of the conicall body which is also caused by the suctional force of the engine. y v

With the above and other objects in view 40 which will appear as the description proceeds, the invention consists of the novel construction, adaptation, combination and arrangement of parts hereinafter described and claimed. These objects are accom- 15 plished by devices illustrated in the accompanying drawing; wherein: Figure 1 is a top plan view of a carburetor whereinmy air feed device isinstalled; Fig. 2 is a view in central vertical section taken 'on a broken ..50 line 2--2 of Fig. 1 and showing the instal- 'lation of the airfeed.; andjFig. 3 is a .y

yiew-in perspective of the air `feed vregulatmg device Aand its associated ring. d Referring to the `drawing throughout `which like reference numerals-indicate like-1155 parts, the numeral 5 designatesl the iioat chamber of a carburetorfrom which gasoline is Afed through` a conduit 6 and through a needle valve7` finto amixing chamber. Air is drawn into the mixing chambero through an entry port 9 ,and the mixture .of gasoline and air. passes outwardly vfrom the `mixing chamber through a screen 10 and discharge port 11 that are provided in a head member 12 whichis secured tok1the'i'l5 A.top of the mixing chamber.V The foregoing vparts form -nopart of my invention except insofar as theymay enter into combination therewith. Said` parts -mayf be of varied construction and design, `it-lbeing u-nderstooda'm lthat myimproved air feed may be installed and used in .connection with any vformpf carburetor to which it is adapted.'H

. An annular shoulder lf3-isv formed in-.fthe upper interior Vportion of the mixing charn- "-75 lber '8 and serves as .a seat for my '.devijce.

Another annular shoulder 14 is formed' in the discharge port 11 of thehead member 12 lwhere the screen 10 is mounted ,and .serves `asa stop to limit the yu pward movement offsn the ring memberof my feed device. Anda third shoulder 15` is providedy Abetween the aforesaid ltwo shoulders by. the bottom edge i ofthe headjmember 12 which projectsfdowynwardly into themixingv chamber Landtermi- 85 nates a short distance 4above the shoulder 13. Said last named shoulder limits the upward movement of the main body, portion of--my air feed' device. 'It-willythus beapparent that the three shoulders limit,- ideli'nego and control the functions ofthe airafeed improvement which will now be described.

Essentially my invention. comprises a: hollow truncated conical body 16 with its vlower or smaller end flare'dor curved outwardly, 95

as at 1.7. The upper portion of said ',bodyplis v ntegra-- Pfovded with a .Cup flange 1.8

which normallyseats on the annular shoulder 18 within the mixing `chamber 8 and its outer annular edge litstsnuglvyand slidably10o Vupstanding portion 19 of the main body 'upstanding body portion.A

16 has a vertical outer wall 2O and a curved interior wall portion, as at 21, which merges into the interior slanting wall of the main body. n When the cup flange 18 is seated on the annular' shoulder 13 the lower flared end portion of the body 16 completely envelopes the upper portion of the needle valve 7 as clearly shown in Fig. 2 of the drawing.

A plurality of spaced apart holes or perforations 22 are provided through the main body 16 and said holes slant upwardly and inwardly and are slightlyvlarger on the outsideA of the body. A plurality of spaced apart holes 23 extend vertically through the cup flange 18 and grooves 24 extend upwardly along the outer vertical wall 20 of the upstanding body portion 19. At the bottoms of each of said groovesV a hole 25 exntends horizontally and radiall through said ring 26 fits slidably and snugly around the upstanding body portion 19 and is normally seated into the cup ange 18. Said ring is rounded on its inner, under edge, as at 27, so that it does Y not completely obstruct the holes 23 yand 25.

Y My Adevice operates by means of the suction created by the intake stroke of the engine to which it is attached, it being understood that the head member 12 of the carburetor is ordinarily connected tothe intake of an engine manifold. When the engine is ,first started the members of my air feed device remain in the normal o'rjseated positlon, as shown 1n,F1g.'2, whereby a comparatively small amount of air is drawn throughthe device and consequently a rich mixture of gasoline is delivered to the engine from the needle valve7. The air enters Vthrough theV port 9, passes upwardly through the lower flared end 17 of the body 3 4 16, and also into said body through the upwardly slanting holes 22 in its side wall.

Some air alsopasses through the holes 23 in the cup flange 18,V a part of which passes upwardly 'through the grooves 24, and some fof which is directed byV the rounded under edge 27 of the ring 26 through the horizontal holes '25 intoV the upper portion of the body 16.

- Upon increaseof the engines suctional force the ringf'26 is lifted from its seat on the cup flange 18a-nd more air is thus mixed Ywith the fuel. When' the force of suction Abecomes suiiciently strong` said ring is lifted entirely free of the top portion 19 of the body 16, as shown in dotted lines in Fig. 2, and may be stopped by the annular shoulder .'14. Inlthis position of the ring air passes directly upward and f freely throughthe f holes y23 inthe'cup lflange18 thus supply- "ingra `lean fuel mixture to the engine. Up- 'on excesslve suctional force of the engine n supply of air.

the entire body 16 of the device may be lifted until its cup flange 18 engages the intermediate annular shoulder 15 and remain there while the engine is running at high speed. In this lifted position of the body its top portion 19 is again brought into engageable relation witi the lifted ring 26 whereby most of the air will pass through the main body 16 entering same through its slanting holes 22 and through its flared 75 bottomV end 17 An increase of air passes through said flared bottom end due to the fact that same is lifted whereby the passage VareaY around vthetip of the needle valve 7 is increased. Y When the engine is slowed down S0 and its suctional. force is decreased the reverse movementsof the body 16 and the ring' 26 take place respectively until they are again normally seated uponl slow speed of the engine. It will 'now be apparent thatI 85 oline from the vvalve 7 with the air from the' slanting holes 22 through-290 the body 16 of my device form a very important part of my invention. serve to thoroughly vaporize or mixthe gaslower ared end 17 in its upward passage 95 A through the main body of the device, and the air projected through the radial, horizontal holes 25 serves to complete the mixing process. The extension of the body down whereby its smaller flared end 17 envelops 10o the tip ofthe valve 7 is another important feature of my' invention. FromA actual tests it is found that my air feed device effects a considerable saving in fuel by increasing the mileae per gallon, causes theengine to run 9105 smoot engine cool at all times.4

Having thus described -my invention, it

being understood that minor changes in its lv without vibration, and keeps the construction may be resorted to, without dei-" parting fromthe scope and spirit of the invention, what I claim and desire to secure by Letters Patentof theUnited States is The combination with a carburetor mixing chamberhaving three spaced apart shoulders in its upper portion and a central upstanding fuel valve in itslower portion, ofk anair feed comprising a hollow conical truncated body having its smaller, flower,

en d flared outwardly, a cup fiange for the upper portion of' said bodyA adapted to normally seat on the'lowermost of said three shoulders, and adapted forv slidable Amovement between the `lowermost and intermediate shoulders, the lower flared end portion lof said hollow body positioned to envelop the tip of the fuel valve, said hollow body-having a pluralityA of spaced'a-part holes extending upwardlyv and inwardl therethrough below the cup iange, said cup iange having a plurality of holes extending vertically therethrough, a plurality of grooves extending upwardly from the holes through the cup lia-nge along the outside of the body, a. plurality of holes extending horizontally from the lower ends of the grooves through the body, a ring adapted to normally seat on the cup ianger and adapted to slidably move to the uppermost of the three shoulders, and said ring having a rounded under, inner edge Whereb the holes through the cup langeand throug the upper ortion of the body are partly restricted wien the ring is normally seated on the cup flange.

In testimony whereof I ax my signature.

SETI-I LONG.

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