US1095212A - Carbureter. - Google Patents

Description

C. F. JOHNSON.

CARBURETER. APPLICATION FILED SEPT. 29, 1913.

Patented May 5, 1914.

2 SHEETSSHEET 2.

wg, a

. and positioned substantially parallel to thel Aim UNITED sTATEs CHESTER F. JOHNSON, 0F DETROIT, MICHIGAN.

CARBUBETER.

' Specicaton of Letters Patent.

Patented May 5, 1914.

Application mea' sepemter ce, ma. smal No. 792,251.

Ta all 'whom it concern Be it known trat I, CHESTER F. JoHN- soN, a citizen of the United States, and a resident of Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Carbureter, of which the ollowing is a specification. i i

This invention relates to means for controlling the current of air passing through the c-nrbureters of internal combustion e ngines, and its object is to provide a novel valve to controlfthis current of air, and a simple and readily adjusted abutment for the spring .which normally holds the an' valve on its seat. l

This invention consists, in combination with the body of tliecarbureter, of a valve chamber adjacent thereto, a novel disk valve pivotally mounted in said valve chamber, an adjustable abutment, and a compression spring engaging said abutment and the valve plane of the valve. n

In the accompanying' drawings, Figure 1 is a central section of the carbureter. Fig. 2 is a transverse section through the throttle valve. Fig. 3 isl an elevation of theadjusting device for the throttle valve. Fig. 4 is a tsect-ion on the line -m of Fig. 1.` Fig. 5

is an elevation of the ioat chamber, 1iortions being broken away, to show details of construction.

Similar reference characters refer to like parts throughout the several views.

This carbureter comprises a body constiuting a carbureting chamber, a' float cham. ber secured thereto, a valve chamber'connect ing to the body, and a discharge passage extending from the body and in whichthe throttle valve is mounted.

The body l has connected to it an upwardly` extending cylindrical shell 2 provided with a tubular lining 3, between which and thc shell 2 the circulating water of the engine may pass through the openings 4 and to heat the explosive mixture. A shaft 6 extends through the shell 2 and the lining 3, and carries the throttle valve 7. An arm 8 on one enti oftheshaft is engaged by the spring 9, the other end of the springpengaging the lug 10 on the shell 2. This spring normally holds the throttle valve in the position shown in Fig. 1. A second arm 12 may be secured tb the other end of the shaft 6 so that thewthrpttle maybe opened by connecting means extending from a plurality of Stitions. A third arm 13, carrying an vad'ustfable screw 14., is shown secured to this s aft, the screw engaging a lug 15 on'the shell to determine the size of the passage around the of its closing movement. 'A plug 16 permits drainage of the space between the shell' 2 andlming 3.

body 1 is a downwardly inclined diaphragm 17, having a downwardly-taperinfr` strangletube 18'mounted in its center. The tube 18 has perforations 19 to permit draining oi of the fuel which may condense in the body and accumulate on the diaphragm. A heating element 20, groundedat. one end on the tube diaphragm and. be energized by current over the Wire 22.

The float-chamber consists .of a central casting, comprising the head 23, having upwardly extending lugs 24C' contacting with the diaphragm, the feed connection 25 having a seat for the valve 26, the arm 27 carrying a pivot 28 for the float 29, and the stem 30 having the passages 32 and 33. A plug 3l screws into the bottom of the passage 32 and holds the cup in position. phragm has a downwardly extending flange 36 over the openings bet-Ween the lugs 24. A nozzle 37 may have a lnedetermined bore to deliver the proper amount. of fuel oil.

An'extension 38 onv the head 23 carries a, 'sleeve 39 in which a stem 40 is slidably mounted, beingnormally held up by the spring-41. A bracket 43 on. the sleeve sup- 45 which may be 4swung, to depress the stem 40 to hold down the iioat and thus permit the level of the fuel oil to rise higher than the upper end of thc nozzle 37 and fill the depression in the head23, thus insuring a very rich mixture. f

A valve chamber extends 1 and has a lower'opening or air inlet surheld in position by a ring 52 of mele/l. The ring 51 is the seat oi the valve 53, which is preferablyA of aluminum so that it may be very light. Lugs 54, extendingl down from the 'chamber 50, 'support the pivot b5 for this valve, which valve may be counterba'lauced by the weight 56. The up er o enthrottle valve when the valve is at the limit.

Across an opening in the bottom ofi-the.-

The dia-.

from thehiidyl rounded by a ring 51, preferably of leather,4

vai.

18, may be secured to the lower side of the ports a pivot 44 on which is mounted a lever l ing inthe valve chembermay be c osed y a 11o cap 57. A. dish 58, preferably of. leatlier,l may be. secured to this cap by means ot .fi rivet 59 and washer G0 and furnish a noiseless abutment for the valve 53 and limit its upward movement.

Tivo platesl (3:2 on the upper side of the valve chamber carry the pivot 6B for the controlling lever which has a'downwardly extending arm 64, a slotted arm and an inclined arm 66. This lever is normally in the position shravn in F l, being thus held by means of a double spring 67 that has a circular portion on each side of this lever, concentric with the pivot 63, the two circular portions connected at the right of Ithe artn G4, and the ends 68 of the spring engaging ine pin (39. As the circular portions of the spring tend to open, the arm G4 of the lever will he held toward the left., as in Fig. l. I A compression spring 70 connects to the lower end of the arm til and to the lug 71 `on the valve 53 and normally holds the valve on its seat. The relation oi' the 'parts is suoh'that the spring 7() will he substantially `parallel to the seat of the valve lVhen the engine is turned over and begins to draw air up through the earl'iureter, the valve 53 will be lifted, and, because of the springA 70 being mounted above the plane of the valve andond4 the opposite side o' the valve from its piaot, it will swing up on its outer end as a'pivot, so that the rate of compression ot thespring will be less1 than the rate of movem'eint of the valve. if the point oi" connection of the spring with the arm nl were moved near to the pivot 55S, the compression of the spring would decrease still slower. until the point of support andthe pivot 55 coincided when there would be no effective action of the spring.

Moving the point of support from the pivot 55 results in the compression of the spring increasing much faster, the maxi mum being reached when the line oi the spring is at right angles to the line connect ing the pivot oi" the valve and the point ol vattachment. of the spring to the valve. have found that the most effective action is obtained by so proportioning the parts that the pivot 55 is below substantially the iniddle of the length of the spring and the spring is substantially parallel to the 'face of the valve.

To increase the initial tension of the spring, a threaded projection 72 on the valve chamber may be formed to receive the'screw 73, provided witlra` ribbed knob 74 and a pointede'nd 75 adapted to engage the inclinedarin ,66, as, shown in Fig. l. By screwing in this pointythe .arms 6G and 64 will be swung toward the right, (in Fig. l) a'fnd 'thus initially compress the spring 70.

small p in 7.7, having a collar 78 and pointed nd79',"may be mounted on a proper bore r body having an air in an extension 80, being held upward hy mounted on Said the spring Sl so that the. point. 79 will cngagc thc knob Tl and prevent the screw l'roni turning alter it has been adjusted.

A flat plate Sil niniv be scoured over the space between the pla tes (352, as shown in Fig. l, by means of the screw S, and prevent the entrance of dust :ind dirti.

liv means of a connector attached to the aini G5, increased tension can be put on the spring 70 and the (low of the air through the main inlet may be thereby retarded, thus reducing the air pressure in the body of the carbureter and causing :in increased flow of fuel from the nozzle 3T. The normal tension on the spring can be regulated by turning the screw 73, in or out, and thereby increasing or decreasing the tension of the spring 70.

I cliiiin.

1. In a carhurcter, the combination of a carbureting chamber, .s valve chamber connected thereto and having an air inlet in its lower side, a flat valve normally closing said opening and having a downwardly and outwardly exteni'ling arm, a pivot for said arm and valve mounted on the valve chamber below the plane of tlievalve, :1 lug on the upper side of the valve, and i. compression spring mounted above the plane of the valve and substantially parallel thereto and in engagement with said lug to normally hold down the valve.

in a carburetor, the combination of a carlnircting elian'iher, :i valve chamber connecflril thereto and having an air inlet in its lower Iside and a valve-seat encirclin the opening, .fiv pivot support extending own troni ihe body and a pivot. mounted therein, a valve normally elosing the air inlet and having a downwardly extending arm mounted on the side ot' the valvma compression sprin nniinited above the plane ot' the valve with one end in engagement with said lug', and inljustahhf i'neans` for supporting the opposite end o1? the spring.

ln a, Corbin-eter. the combination-of a inlet and a valve-seat encir-"lineY ihe opening, a pi vot support extendingdi'iivn troni the body at one: side of the opening. a valve normally closing theaii` inlet and having an ai-ni extending through the opening;` and iivoted on said support, a compression spring edending above and parallel to the valve sont, a .lug on the valve engaging one end of the spring, and an adjustable lever engi'agirig the opposite end of the spring.

Ll. In :i xarlinreler, the combination oi" sil body haring an air niiet, a pivot sniiport extending downwa :lly at one side of the opening, valve no Vnallji; clfsing ysaidopeiiing. and having an armextending down through the opening, a pivot for the iii'in Support., a eounterbulan'cii 106 pivot, a lug on the upper spring.

5. i1 a carbureter, the combination of a chamber having an Iair inlet, a pivot support extending downwardlyat one side ot' the opening, a valve normally closing said openin and having an arm extending down v througi the opening, a pivot for the arm Cil mounted on the support,-a lever pivotally mounted adjacent the valve, a spring having one end in engagement with the lever and the other in engageinentwitli the valve, a pointed screw in engagement with the lever for determining the initial tension of the spring, and means for locking the screw in a given position of adjustment.

(i. In a carburetor, the combination of a chamber having an air inlet, a pivotally mounted valve normally closing the inlet, a pivotally mounted lever adjacent the valve, a spring having one end in engagement with the lever and the other end in engagement with the valve, means tending to movethe lever in a direction such that, if unrestricted, it would tend to tension the spring, and adjustable means for limiting the amount ot said movement.

7. In a carburetor, the combination of 'a chamber having an air inlet, afpivotally mounted valve normally closing the inlet. a pivotally meunted lever adjacent the valve` a spring having one end in engagement with the lever and the other end in engagement with the valve, a second spring tending to swing the lever in a direction such that. it unrestricted, it would tend to tension the first Spring, andadjustable means for limiting the amount of Said movement'.

S. Tn a carburetor. the combination ot' 'a clianiliered body -haviner an' air inlet', a `iivotally mounted valve normally closingl tile in let, pivot supporting plates integral with the body, a lever pivoted between said plates, means'connecting the lever with the valve, and a plate for closing the space between the pivot supporting plates.

S). In a carburetor, the combination oft a body having an air inlet, a valve normally closing the air inlet, a pivot tor said valve adjacent the inlet and below the plane ot' the. valve, a compression spring extending above and. parallel lo the valve seat and Sobelair tially e ual distances on each side, ot' Ieaid pivot, a .ug oi the valve engaged by one end ot the'spi'lng, and adjustable means engag-v ing the opposite end of the spring.

10. In a earbureter, the combination of a chamber having an air inlet, apivotally mounted valve normally closing the inlet, a'

pivotally mounted lever adjacent the valve, a spring having oneend in engagement with the ,lever and the other end in engagement.

with the valve and tending to move the leve`r in one direction, a second spring engaging with the lever and tending to move it in the same direction, and adjust-able means,

for limiting thev amount of movement that inay be given to the lever.

ll. In a-carbureter. the combination of a chamber having an air inlet, a pivotally mounted valve normally closing the inlet, a pivotally mounted .lever adjacent the valve, a spring having one end in engagement with the lever and the other end in engagement with the valve, and tending to move the lever in one direction, a second spring engaging with the lever and tending 'to move it in the same direction, anda screw for limiting the amount lof movement that may be given to the lever. v

12.'In a carbureter, the combination of a carbureter chamber, a valve chamber connected thereto and having an air inlet, a

substantially. fiat valve normally closing said inlet, said valve having attached thereto an outwardly and laterally extending arm, a pivot for said arm and valve mounted on the valve chamber, a projection on one side of the valve, and a spring mounted at the same side of the valve as the projection, said spring being arranged substantially parallel to the. plane of the valve and having one of its ends inengagement with said projection to normally hold down the valve.

i3. In a carburetei', the combination of a carburetor chamber, a valve chamber connected thereto and having an air inlet, a valveseat around said inlet, a substantially tlat inwardly opening valve normally closing said inlet;` said valve having attached to the outer leide thereof an outwardlv and latorally extending arm and to the inner side thereof an inwardly extending projection, a, pivot for said arm. and a spring mounted on the same side of the valve aa the projection, said springl being arranged substantially parallel to the plane of the valve and hav' ing one ot its ends in engagement. with said projection to normally hold the valve upon the seat.

ln testimony whereof I have Signed this .speelieation in the presence of two subscribing witnesses.

v CHESTER F. JOHNSON iV il nesetes z lliuzo lV. KaniNnniNo, l). M. SPENCER

Images