US1847747A - Carburetor - Google Patents

Description

March 1, 1932. BOSSARD 1,847,747

CARBURETOR Filed July 8, 1929 2 Sheets-Sheet 1 9% I I [Q i 2 5 |'l"' T ,0

1!. 5 I ,z I i I II gwmntoc March 1, 1932. T1 BDSSARD .QRBURETOR Filed luLy 8, 1929 2 Sheets-Sheet 2 (Comma Patented Mar. 1, 1932 -f I i I V omen STATES OFFICE Application am July 8, 1 92 9. serm at. 376,826.

' My invention relates to automobiles and 'rectly from the fuel in the tank and supplies more particularlyto fueling systems for intherich mixturefor idling of the en 'ne. troducing the fuel to the motor from the Theboss 3 is connected with the tank with a gasoline. tank. I v leadpipe 3b and supplies the running fuel 5 A furtherobject is to provide a device to the engine. The boss3 is hollow at and is which when used in combination with my a control needle valve 5 is carried in a boss fueling system, filed in the Patent Office, Sea formed on the under side of the boss 3, said rial- No. 270,231, filed April 16, 1928, w1ll valve to'c'ontrol the amount of fuel allowed vaporize the fueljafter it has been taken from 'to pasS'throughthe opening 3a into the stand 1'0 the tank, and introduce it to the englne- 1n pipe 6. "The said opening 2a of the boss 210 a gaseousstate. I is partially closed and the opening therein is These objects I accomplish with the decontrolledby a needle valve-.11, thereby provice "illustrated in the accompanying drawvlding external means of controlling the flow ings in which similar numerals and letters of fuel through the idling pipe and the fuel 5 of referencefindicate like parts throughout supplypipe. A stand pipe 6 is formed in- 66 the several views, and as described in the tegral with the plate 1, on the top side therespecification forming a part of thisapplicaof, andis bifurcated into a pipe 8 and a 7 tion, and pointed out in the appended clalms. branch pipe 9. Thesaid pipe 8 is passed up F In the drawings in which I have shown the through the main body 0 thecasing A and o best and most preferred manner of building "apartial closure boss 7 is secured across the :my' invention Figure 1 is a diagrammatlc sald casing, having a hole 7 a1 therethrough, view of the installation of the device on the through which the topend of the pipe 8 r0- intake manifold of an engine with the lead trudes. *The end of the pipe 9 is carrie up pipes from the fuel supply tank shown,'parts along the side of the casing suflicient discut away. Figure 2 is a side elevation of'the tanceto'clear the outer end of a flap valve 13.

device. Figure 3 is a longitudinal vertical An idling pipe 10 is connected with thetop section of the device. i i side oftheplate 1, over the end of the open- In the drawings I have shown'the casing of ing 2a, and leads up alongside of the pi 9 I my invention as'A', the intake manifold as to a point just below the valve 13, at w ich 30 B, the spring'control chamber as C, the mopointthe idling pipe 10 is passed through one tor as D, theexhaustpipe as E, and the fuel side of the pipe 9 and out, through the top tank as G. In the top of the fuel tank I open end thereof and said idling pi isexprovide my vaporizing device H, as illustrattended up into the intake'rnanifol B to a led in my former application Serial N0. point 10a above the level of the throttle valve 35'270,231"which matured to Patent"1,753,199 12. Thethrottle valve 12"is pivoted in the 86 issued April 8, 1930, and the connection which intake 'mani'foldfby the pivot pin 12a and a joins the main surrounding heater pipe with small opening is cut in one side to allow the the exhaust pipe is shown as F. "end 1011 of the pipe lO-to be passed there- I The casing A of my device is made in a through This construction provides an 10 rightangle, with a portion A1 at right angles idling pipe uncontrolled by either flap valve 00 to the main body, and through which the air or by the throttle valve so that fuel is introfor the carburetion is'introduce'd. The botduced 'into' the engine through thisidling tom portion of the device is open at A2 and pipe atall times when the engine is idling. a-closure plate 1 is secured thereto by suit- Theflapvalve 13 is pivoted within the main able means, said plate completely covering casing A'by a pin 13a and when the valve 06 said opening. On the bottom side of the is closed it completely closes the entire openplate L,"I provide two converging bosses2 ing ofthe casing A other than that space and 3, with the boss 2 of smaller diameter which has previously been closed by the clothan theboss 3. The said boss 2 isconnected sure? with a cut made in the outer end of 5 with'a leadpipe-2b which in turnleads dithe said valve through which'the pipe 9 is casing A and at an angle thereto and said chamber is internallythreaded tolreceifvea cylindrical piston chamber 17 which chamber'is hollow to receive the said piston 18. The free end of the saidpiston is hollowed out to receive one end ofa spring '19'which spring is carried between the piston and the closed. end ofthechamber :17, and theipressure ofh'the spring is down upon the piston at all times with the tension to close the flap 0 valve 13 in the casing'A. A hole is bored through the end of thepiston 18acljacent the vsocket and connecting the socket with the chamber in which the spring is carried and aiplate- 2 1 is pressed into the said piston to hold the ball on the end of the connecting rod 16 into the piston, socket. The hole20 is to provide a valve action on the air contained inthe chamber between the head of the chamber 17. and, the piston 18so. that when the piston is traveling up the oha rnbemair compressed thereabove, and when the'zpiston ,isftraveling down thei ballon the end of the connecting rodis moved slightly, away from the said hole 20 allowing the air toipass therefthrough to prevent creation of suction or vacuum within the piston chamber. ,The outer side of the chamber C is provided with V .a boss to which a spring, 22 is securedby a 1 valve 11, and out'through-theend10'a of the Iscrew23; The free end of the spring 22 is provided 'with alpressed dog 24 thereimsaid dog adaptedto fit into notches 01 teeth 25. which, teeth25 are formed on the-outer periphery of the chamber 17. This allows for ,rotation of the chamber to vary thetension ofthe spring 19 and for means of locking the chamber from rotation so that it will not [change itsposition except by manual operation for different adjustment of the spring tension. i a

A choke valve 28 is pivoted in the portion A1 of the main casing A by apin 29 andis to control the flow of air. therethrough, and for starting the; motor when it is cold. A lever 29a is secured. on the end of the pin 29 and admire rod 30'is secured in the end thereofbya pin; 31. I

The throttle valve. 12 is cont-rolled by a lever'32' secured on the outer endofthe pin 12a and a throttle rod33 is provided to control the movement of .the valve 12.

The operationof my device is as follows:

The idling gasoline vapor is drawn from the tank-through the line 2b, the opening 2a; passingithroug'hthe pipe 10, around the [pipes being above the valve 13, the air which is allowed to pass the valve 13, will thoroughly mix with the vapors providing complete mixing of the fuel with the necessary amount of air required for complete combustion of "the fuel after it has been introduced into the motor. As the motor is accelerated by opening the'throttle valve 12 the suction of the motor will draw more fuel vapors through the pipe 3a, and the flap valve 13 will be drawn open commensurate with the suction of'the engine allowing just the correct amount of air to enter'the upper portion of the casing A where it is mixed with the fuelvapors after they have been drawn out through the pipes 8 and 9. The positions of the pipe 8 and 9 being on opposite sides of the casing A, provides more complete mixing of the fuels before they are drawn into the intake manifolctandthence to the engine. This type of device shown is for using vapors as obtained from the tank by any suitable method, but it will be obvious that the carburetor would work if the pipes 36 and 2b were 'carrying liquid fuels instead of vapors and were connected directly with a float chamber such as would be necessary were the fuels supplied to the pipes froma vacuum tank or fuel pump. 7

' Havingthusdescribed my invention Idesire to secure by Letters Patent and claim In a fuelmixing device the combination of a casing having an air inlet at right angles thereto; means to manually close said inlet as desired; a plate onthe bottom of said casing having two pipes extending upwardly therefrom one of which is bifurcated with one end bent toward the perimeter of the .bore and extended upward to near the top end of the casing and with the short end extended up through a hole in a partial closure in said casing; a throttle valve above said casing in the intake manifold with the small- .er of the two pipes extended up through a cut in the throttle valve; a flap valve pivoted across said casing adjacent said partial closure; an opening in said flap valve to allow one leg of the bifurcated pipe to pass therethrough; a connecting rod pivoted on the side of said flap valve; a piston secured on the free end of said rod by a ball and socket joint having some degree of play therein an adjustable cylinder in which said piston is operated, said cylinder being screwed into'a control chamber on one. side "of said casing a spring between the inner end of the cylinder and the top end of the said piston; anda port through said piston back of the ball and socket joint with the ball end of the connecting rod adapted to close the port when the flap Valve is drawn suddenly open and to allow passageof air therearound when the flap valve is closing or moving gradually.

In testimony whereof he has aflixed his signature.

' THEODORE BOSSARD.

Images