US1186164A - Carbureter. - Google Patents

Description

H. B. BENJAMIN.

CARBURETER. APPLICATION HLED MAR,|2,1EY3\ 1 1 86, l 64. Patented June 6, 1916.

4 SHEUS SHEET i.

wing 7 E fie/wean (mg. L/

UNITED STATES PATENT OFFICE.

REUBEN IB. BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC KEG. COMIPANY, OF CHICAGO. DZLINOIS, A CORPORATION OF ILLINOIS.

CARBUBETEB.

Specification of Letters Patent.

Patented June 6, 1916.

T 0 all whom it may con/:ern

Be it known that I. Rlzu'nnx B. BENJAMIN, a citizen of the United tates. residing at Chicago, in the county 01 Cook and State of Illinois, have invented new and useful Improvements in Carburetors, of which the following is a full, clear, concise. and exact description, reference being bad to the accompanying drawing, forming a part of this specification.

My invention relates to improvements in carburetors for explosive engines and has for one-of its objects the provision of a carbureter which will automatically regulate the air and gasolene supply in accordance with the speed at which the engine is run.

Another object of my invention is to provide a carburetor which due to its automatic regulation will dispense with the use of the butterfly valve now in use for controlling or throttling the engine.

Another object of my invention is to provide a carburetor which while automatically controlling the supply of air and to the engine will also permit of the p 'etermining of the fuel supply to the engine, the automatic tion operating irrespective of the positron to which the controlling f discl or e purpose 0 osmg my mvention I have illustrated in the accompanying dra certain embodiments thereof.

In said drawings, Figure 1 is a transverse view of one form of carbureter embodying my invention; Fig. 2 is a. sectional view taken on the line 2-2 of Fig. I; Fig. 3 is a sectional view taken on the line 33 of Fig. 1; Fig. 4 is a sectional view taken ont-helineHofFig.2;Fig.5isasectional viewtakenon theline5-5ofFig. 1; Fig. 6 is a longimdinal sectional view of a modified form of carburetor embodying my invention; Fig. 7 is a sediional view taken on the line 77 of Fig. 6; Fig. 8 is a sectional view taken on the line 8-8 of Fig. 6; Fig. 9 is a detail sectional view taken on theline99ofFig. 7; and Fig. 10isa detail viewlnof thzdmodi ficaton of the diahragm ustrat in p In time carburetor embodying my invention and illustrated in Figs. 1 to 5, inclusive, I vide a gasolene float chamber 1 which is adapted to receive its supply of gasolene through an inlet port 2 communicating with the gasolene supply tank by a pipe 3 and controlled by a needle valve 4. This needle valve is mounted upon the hub 5 of a threearmed spider 6. the arms of the spider being connected with suitable floats 7 whereby the needle valve is controlled by the height of the gasolene in the float chamber 1. The top of the float chamber is covered by a cliaphragm 8 which is secured over the chamber and between the top of the chamber and the upper casting 9 of the carburetor, suitable flanges 10 on the float chamber and 11 on the upper casting being provided to receive securing bolts 12 for bolting these two parts of the carbureter together. The center of the diaphragm 8 is provided with a spray' nozzle in the form of a rivet 13 provided with a cone-shaped opening 14 through which the gasolene from the float chamber is adapted to pass into the carbureting throat 15 of the carbureting chamber. This spray nozzle is controlled by a needle valve 16, the lower stem of which provides a guiding stem for the hub 5 of the spider and is adjustable by means of the screw-threaded connection 17 in the bottom of the carbureter chamber.

The throat 15 comprises an opening through a rotatable nut 18 which is located at the bottom of the mixing chamber 20. This nut is screw-threadecl into the casting 9 and the screw-threads have a large pitch so that a slight rotation of the nut will cause the mine to move vertically. The lower end of the not when at its lowermost position is adapted to touch the top of the diaphragm 8. suitable air ports 21, however, being provided to permit the pasage beneath the nut of the air even when the nut is in its lowermost position. The air chamber 22 of the carburetor is located around the bottom portion of the nut 18 and is provided with air ports 23 which communicate with the exterior of the casting 9. a suitable screen 24 being arranged over the exterior of these ports to prevent the entrance of dust and articles of foreign matter.

Centrally disposed within the nut 18 is a stop valve 25 which is supported on suit able spider arms 26 extending from the inner walls of the nut 18 and this valve is located immediately above the gasolene spray valve 14 and in a position to vary the Size of the opening of this valve as the dia CJI , found desirah phragm 8 is raised. The nut 18 is adapted to be rotated for the purpose of raising and lowering the same by a laterally extending arm 27, which may be connected by a rod or lever '28 with suitable operating means on the steering wheel of an automobile. In addition to the air inlet ports 23 I provide a second air inlet port which is preferably formed by a vertical channel 29 in the nut 18 and a transverse channel 30 in the top of this nut. This vertical channel as the nut is rotated oommimicates with an opening 31 through which the arm 27 passes and opens more widely the further the nutis rotated to be raised. In order to maintain the atmospheric presure in the float chamber 1, I provide a suitable vent 31 which communicates through the pipe 32 with the atmosphere.

The operation of the device is as follows: With the nut 18 in the position illustrated in Fig. 1, a maximum su ply of gasolene and a minimum supply air is admitted tothe chamberlfl. Ithasbeen as the speed of the engine increases to decrease the richness of the mixture, and by the operation of my carburetor this is automatically brought about. As the speed of the engine increases the suction of the pistons in their cylinders will tend to raise the diaphragm 8, thereby moving the valve 14 in closer proximity to the needle point and to the of gasolene which is drawn through the valve 14. At the same time the of air into the mixing chamber is also controlled; therefore, the mixture delivered tothe 'eislessrichlfitisdesired to vary explosive charge to the engine the nut 18 is rotated, which, in turn,willcausethenuttoverficallyrise,so thatthediaphragmwillhavetoberaiseda greater distance before the needle 95 will tazdtoclosethevalve 14. Atthesame timetheraisingofthenutlSwilhadmita greater-m1 l ofairtothennxr' 'ng no to thg fid that the nut '18 is raised above the diaphragm, and also due to. the

as": Itwillthns semthatm-euse imy improvedtheri esofthemixturedeliremdtotheengiueisautoy variedinacoordancewrththespeedofthe mgineandatthesametimethechargemay be manually varied without afiocting the automatic regulation. As previously stated the nut 18 can be screwed down until its lower end the diaphragm 8. The flow ofairisthen solelythroughthesmall m 21. Further downward mot of thenutwillincreasethefuelopeningwithout the air opening-whereby a can be ohtamed whendesired.

The structure illustrated in Eigs'6 to 10 shows a means whereby the closure valve may be adjusted. In this structure I proride a float chamber 1 similar to the float chamber illustrated in Fig. 1. The gasolene inlet, however. is through the valve 31 in the bottom of the float chamber 1, which inlet is protected by a screen The valve 33 for controlling the gasolene inlet opening is arranged upon the lower end of a stem 34 which is secured to a hub 5 similar to the hub of the float illustrated in Fig. 1. The upper end of the stem 34 is guided in a downward extension of a spray nozzle 35 secured in the center of a diaphragm 8, similar in construction and arrangement to the diaphragm 8 in the structure illustrated in Fig. 1. This extension 35 is provided with a plurality of gasolene inlet openings 36 and a vertically extending central opening 37 through which the throat communicates with the mixing chamber 39. As in the structure illustrated in Fig. 1, suitable air ports 23 are rovided which communicate with the air c amber 22 and the air passes from this chamber into the throat 38 through openings 21 in the vertically movable nut 18, similar in general construction to the vertically movable nut illustrated in Fig. 1. The opening 37 is controlled by a closure member 40, which is similar in function to the closure member 25 shown in the structure illustrated in Fig, 1. This closure member, however, in Fig. 6 takes the form of a needle valve on the end of a stem 41 which extends up through an extension 42 as 5s m l s top 0 casing ormi t chageber 39 and has its end 1 u toreceire squared o 11mg of the arm 43 by which the nut 18 i; rotatable. The stem 4d is screw-threaded into the projection42andhasitop squaredasattlto receive a wrench or key to permit the rotatiou, of the stem 41 and thereby adjust the valve with to the opening 3? to v the amount of ga'solene fed through If desired, the quantity of air adnn to the mixing chamber may be caused to be more fully varied by enhn-ging the head of the rivet through which the valve 37 extends, as shown in Fig. 10. The cone-shaped head 45 shown in this figurewilltendtoslightlycutdowntheair supply as the di is raised tov cut down the gasolene amply.

Having-thus described my invention, what Iclaimasnewanddesk'etosecureby Letters Patenl; is:

1. In acal'zbureter, the combination with a mixing chamber, of a fuel chamber, a dia phragm interposed therebetween, a fuel valve having a seat member and a closure member, one of said members being mounted on the diaphragm and adapted to respond to the movement imparted to the diaphragm by valve in accordance with-the variations in pressure. in the mixing chamber, said valve and: diaphragm so constructed that movemenbof. the diaphramn awayfrom the fuel towardthe chamber tends-to close said valve opening.

3. Thelcombination with a mixing chamber, of a fuel chamber, a diaphragm interposed between said chambers, and a valve for controlliug'the admission of fuel to said mixing chamberrsaid diaphragm responding tothe-variationof presure in the mixing chamber and controlling the opening and closing of said valve said valve and diaphngm so constructed-that movement of the away from the fuel chambcr toward the chamber tends to valve opening.

[141 In a V jeoombination with a interposed between said chambers, a ior, the admission of fuel to diaphragm reof pressure in the mixing controllingtheopeningland'closingjofthe valve, said valve and so oomtructed that:movesaid valveopening, and means for manually va if the extent of closing and opening of the v ve by the diaphragm.

5. In a carburetor. the combination with a chamber, of a fuel chamber, a diaphragm interposed between said chambers. a valve for controlling the admision of fuel to said mixing chamber. and a valve for c0ntrolling the supply of air to the mixing chamber said diaphragm responding to the variations of pmre in the mixing chamher and controlling the opening and closing of said valves, said valves and diaphragm being w constructed that increased suction in the mixing chamber tends to close said valves.

6. In a carburetor. the combination with a fuel chamber, of a mixing chamber having a throat. a diaphragm interposed between siid fuel chamber and mixing chamber. an air inlet formed between the throat of said chamber and the diaphragm, said diaphragm moving in response to variations in pressure in said mixing chamber and conchamherg ofa fuel chamber, a dia- Phrase: a r the fuel trolling the opening and closing of said air inlet, and means for manually varying the distance between the bottom of said throat and the diaphragm.

7. In a carburetor. the combination with a fuel chamber. of a mixing chamber. a diaphragm interposed between said chambers. said diaphragm having an opening therein for the passage of fuel. and a closure membeifor'said opening. Said diaphragm responding to variations in premure in said mixing chamber and adapted to close said passage when moved toward said closure member under the influence of variations in pressure, said diaphragm and closure memher being so constructed that increased suction in the mixing chamber tends to close said full passage.

8. In a carburetor. the combination with a fuel chamber, of a mixing chamber. a valve for controlling the admission of fuel from the fuel chamber to the mixing chamber having a movable seat and a stationary closure member, means for moving the seat toward the valve member to close the valve when the speed of the engine rises above a predetermined point. means for varying the distance relation between the closure member and its seals and means for varying the air supply when the distance relation between the closure member and its seat is varied.

9. In a carbureter,=the combination with a fuel chamber, of a chamber, :1 diaphragm interposed therebetween and having a. port leadin from the fuel chamber to the mixing chamr, a. closure member for said port, said diaphragm being so arranged that when the speed of the engine rises above a point the increased suction of the engine will move the port toward the closure member to cut down the fuel supply to the engine and thereby prevent the increased rise of the speed of the engine.

10. In a carbnreter, the combination with a fuel chamber. of a mixing chamber, a diaphragm interposed between said chambers, said diaphragm having a port and a vertically adjustable. relatively stationary closure member for said port. said diaphragm being so arranged that when the speed of the engine rises above a predetermined point the increased suction of the engine will move said port toward the closure mem er to close the port and thereby cut down the fuel supply of the engine, until the speed of the engine drops back to normal.

11. In a carburetor, the combination with a float chamber. of a mixing chamber, a diaphragm interposed between said chambers having a port therein. a relatively stationary. vertically adjustable closure member for said port, said diaphragm being so arranged that the increased suction of the engine when the speed thereof rises above a predetermined point will tend tomove the diaphragm to close the port thereof, and means whereby the air supply will be varied when said closure member is vertically adjusted.

12. In a carbureter, the combination with a mixing chamber, of a fuel chamber, a flexible diaphragm substantiaily closingthe fuel chamber having a main fuel-suppiy port therein communicating with the chamber and forming a valve seat member,

a flexible diaphragm closing the fuel 'cham berha' aporttherein wer mean -i valve seat member, means for supplying e1 to said port, and a valve device 005 inthemixingehambertendstocloseth fuel supply.

14, Ina-mrbnreter, the combination with a dumber; ofa fuel chamber, a hex ibie diaphragm substantially closing the fuel chamberhaving a main fuel supply port therein communicating with the mixing chamber and forming a valve seat member,

means for supplying fuel to said port, and If a valve device coiiperating with said valve seat member to control the flow of fuel therethrough, said diaphragm, valve and valve seat being so constructed that the movement of the diaphragm outwardly from the fuel chamber tends to close the port 0 a fuel chamber, a mixing chamber, a stifl diaphragm therebetween ha therein for a valve seat operating with said seat member to control the flow of fuel therethrough, and an adjustable sleeve extending into the mixing chamber and the diaphragm to control the flow of air and also to operate the diaphragm to control the fuel flow.

pemng.

15. In a. carbureter.

e passage of fuel and formi 0 member, a valve member c b In witnes whereof, I have hereunto sub- 4 my name in the presence of two witnesses.

: REUBEN B. BENJAMIN.

WZPmYHnm.

M18 m in RW for in eat: eat, hyjiflrcsdng the lot'lngnts MIL-13."

a substantially central opening 1 to close the port thereof, andm'eans whereby the air su ply will be varied when said closure mem er is vertically adjusted.

12. In a earbureter, the combination with a mining chamber, of a fuel chamber, a fiexible'diaphragm substantially closing the fuel chamber having a main fuel supply port therein communicating with the mixing chamber and forming a valve seat member, means for supplying fuel to said port, and a valve device cooperating with said valve seat member to control the flow of fuel therethrough, said diaphragm and valve device being so constructed that increased suction in the mixing chamber tends to close the fuel supply.

13. In a carbureter, the combination with,

a mixing chamber,- of a liquid fuel chamber. a flexible diaphragm closing the fuel chamher having a port therein communicating with. the mixing chamber and forming a valve seat member, means for supplying fuel to said port, and a valve device cooperating with said port to control the flow of fuel to saidport, said diaphragm and valve device being so constructed that increas i in the mixing chamber tends to fuel supply. 1

14.- In a carbureter, the combination with a mixing chamber, of a fuel chamber, a flexment in Oerbureters,

in Letters Patent No. 1,1 86,164.

[sun] that the said Letters Patent should be read with this correc ible diaphragm snbst-antiall closing the fuel chamber having a main K181 supply port therein communicating with the mixing chamber and forming a. valve seat member, means for supplying fuel to said port, and a. valve device cotiperating with said valve seat member to control the flow of fuel therethrough, said diaphragm, valve and. valve seat being so constructed that the movement of the diaphragm outwardly from the fuel chamber tends to close the port opening.

15. In a carbnreter, a fuel chamber, a mixingchamber, a stiff diaphragm therebe tween having a substantially central opening therein for the passage of fuel and forming a valve seat member, a valve member cocrating with said seat member to control Law of fuel therethrimgh, and an adn.v e sleeve extending into the mixing chamber and engagingthe diaphragm to control the flow of air and also to operate the diaphragm to control the fuel How, I11 witness whereof, I have hereunto sub-- scribed my name in the presence of two witnesses.

REUBEN B. BENJAMIN. \Vitnesses:

E. R. KING, \V. Penny Harm.

It is'hereby certified that in Letters Patent No. 1,186,164, granted June a, 191

some may conform to the record of the ease in the Patent (Jfiicm sigma and sealed this 25th day of July, A. 1)., 191a W. ILeLaY,

Acting Commiseimur cf Patents.

AII

is, for an improvm quiring and ties. therein that the Correction In Letters Pa tent No. 1,186,164.

-oorrection as follows: Page 3, line 83, claim 7, for the word full rvnd fzml;

It is'hereby certified that in Letters Patent No. 1,186,164, granted Jum- 6, 1916, upon the application of Reuben Benjamin, of Chicago, Illinois for an impmvomeat in "Carimreters, an el i'or appears 111 the printed specification requiring an? that the said Imtteia Patent should read with this correction them-in tbs? iue same may conform to the record of the ease in the Patent Officn.

sig ned and aeaied this 25th day of July, A. D., 1916.

hymn.) F. W. H. CLAY,

. Acting Commiaswner qf Path-11 C1. 48l54

Images