US1069335A

US1069335A - Carbureter.

Info

Publication number: US1069335A
Application number: US58344010A
Authority: US
Inventors: Henry A Johnson
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-09-23
Filing date: 1910-09-23
Publication date: 1913-08-05
Anticipated expiration: 1930-08-05

Description

H. A. JOHNSON.

GARBURETER.

APPLICATION FILED SBPT.23, 1910.

f Y Y M u, 2

I"TUNTTED sTATEs PATENT onnicn.

. HENRY A. JOHNSON, OF CHICAGO, ILLINOIS.

CARBURETER.

Specification of Letters Patent.

Patented Aug. 5,1913.

Application led September 2a, 1910. Serial No. 583,440.

To all who/ml 'it may concern Be it known that I, HENRY A. JOHNSON, a citizen of the United States of'America, and a resident of Chicago, county of Cook, State of Illinois, have invented-certain -new and useful Improvements in Carbureters, of which the following is a specification.`

The main objects of this invention are to provide an improved carbureter for internal combustion engines of the class where a part of the air supply is drawn through the l liquid fuel instead of spraying the' liquid into the moving air; to provide'a construction in which a relatively coarse adjustment of the level of the fuel in the carbureter will secure complete saturation; to. provide means for. removing an excess of liquid in the vapor; and to 'provide improved means -which will prevent loss of fuel due to over` ilow.

A specific construction embodying this invention isi illustrated in the accompanying drawings, in which- A Figure 1 is a vertical sectional view of ,the complete carbureter, the tank being'shown diagrammatically. Fig. 2 is a horizontal sectional view of the hood covering the air inlet. Fig.` 3 is a detail view of the fuel inlet valve.

In the construction shown,'the main'air supply is provided for by an air inlet pipe 1 which projects upwardly through the bottom of the casing 2 to a position above the normal liquid fuel level 3. Covering the air inlet pipe 1 is a flat top and H ute-sided hood 4 having an integral flared flutedl skirt f The side fluting makesa sliding t with l, the under side of the top' of thehood is fastened a rod 6, to which is-secured a spring 7 normally holding the hood 4 in liquid.

tight contact with the .top of the inlet pipe A. A1. The Afuel supply is delivered through 'a pipe 8, which passes through one of the vertical walls of thecasing 2. The inner end of the pipe 8 is provided with an outlet 9, which is at thenOrmal fuel level 8. A special pipe 10 extends from the 'top of the supply tank 11 to liquid fuel level 3. The fuel inlet pipe A-8 Iis also Vprovided with a needle valve 12 whichslides through a guide box 18, and is pivoted to the lever arm 14. The short end of the lever arm 14- is pivoted to the inner wall of the casing at 15. The long end of the lever arm is pivoted to the center. of a float 16.

air inlet pipe 1.

rExcess liquid is removed from the vapor by a series of gravity draining-

baite plates

17, 18, 19, and 20, said baiie plates being so placed as to form a tortuous passage for thevapor from the level of the fuel to the main outlet 21. The main vapor outlet 21 is provided with an outlet pipe 22 secured Y'to the casing by

screws

23, 23, and to the top of this outlet pipe is secured-a T-tting 24, oneend of which is provided with an auxiliary airf valve 25, sald air valve being normally heldv on its seat 26 by a spring 27 secured to an adjusting screw28. The en'd s l of the pipe 24 opposite the auxiliary'air ,valve 25 is connected tothe engine. i

In operation, the maintenance of the level of `the fuel supply is provided, by placing 'the outlet 9 of the fuel inlet pipe 8 and the inlet ofthe special air pipe 10 at the normal level of the liquid fuel 3. The carbureter, lwhen operated with a closed supply tank, will maintain the fuel level automatically at the position of the outlet 9, due to the pneumatic action of the supply tank. In case the supply tank is not hermetically closed, reliance is placed upon the action of th'e float 16. The flo-at 16 israised by the rise in the level of the fuel, and the fuel in, let pipe S 'is closed by the movement, of the needle valve 12, which is controlled by the float. In this carbureter, the lioat 16 is in action only when the pneumatic control fails, and the level of the liquid rises\above the normal Working level 3. Closure of the fuelv inlet pipe by theaction of the needle valve 12 will take place before the level of the liquid fuel rises above the top. ofthe If for any reason it is found necessary to depend -on the needle valveto maintain the fuel level, then spilling of the fuel through the air inlet pipe will be prevented by the seat-ing of the flat i top of the hood on the upper end of the air inlet pipe.

. The mixture of the vair with the liquid fuel is accomplished `through the suctlon stroke of the engine to which the carbureter 'is connected, and air pressure lifts the hood 4, allowing air to enter the casing by passing under the hood. The uting on the sides forms separate passages which subdivide the charge of air taken by the carbureter. Alll the vair entering the carbureter must pass through thelliquid fuel from the lower edge of the flared skirt of the hood 4. The

' flared and fluted skirt 5 of the hood '4 prothrough the mass of the liquid fuel. As the air leaves the fuel, it carries along with it a small quantity of the liquid in suspension, which is not vaporized, and the`eXcess of liquid inthe vapor is removed by coming in Contact with both the lower and upper surfaces of the

battle plates

17, 18, 19, and 20, which are disposed between the fuel level 3 and the outlet 21, so that the vapor strikes rst the baiiie plate 17 whereit is drawn toward the center of the carbureter, next against the under side ofthe baille plate 18, Where the vapor must pass between the periphery ofthe bathe plate 18 and the casing 2, and in a similar manner to the center of the bailie plate 19, thence aro-und the periph? ery of the baffle plate 20 to the outlet. Vlhen the vapo-r reaches the outlet 2 1 it is fully saturated. The thinning of the mixture 'so as to produce a rapid firing mixture is `accomplished by admitting air to the mixture through the auxiliary air valve 25. The adjustment of the amount of air taken through the auxiliary air valve and its relation to the suction of the'engine is controlled by 'adjustment of the tension of the spring 27 through the holding screw 28, which is provided with a threaded surface.

Although but one specific embodiment of this invention is herein shown and described, it will be understood that numerous details of the Construction shown may be altered or omitted without departing from the spirt of this invention, as defnedby the following claims.

lf claim 1. /A carbureter, comprising a casing adapted to contain a quantity of liquid and adapted to contain aquantity of liquid, said casing having a fuel outlet and a fuel inlet, means for automatically controlling said fuel inlet to maintain a normal level of the liquid infsaid' casing, an air inlet pipe extending into said casing and vterminating 'above the normal level of the liquid, a hood adapted to serve as a closure for the inner end of said inlet pipe, means yieldingly urging said'hood to close said pipe, and an annular ange spaced away from said inlet pipe and depending from said hood into the liquid for directing the air into the liquid.

Signed at Chicago this 19th day of September 1910.

' HENRY A. JOHNSON.

Witnesses: A

PHILIP B. WOODWORTH, EDWIN PHELPS.