US1230621A - Carbureter. - Google Patents

Description

W. H; SWAIN.

CAHBURETER.

APPLICATION FILED MAY 9, 1916.

Patented June 19, 1917.

2 SHEETS-SHEET l-.

' INVENTOR ATTORNEY W. H. SWAIN.

' CARBURETER.

APPLICATION man MAY 9, l9l6.

1,230,621. Patented June 19, 1917.

2 SHEETS-SHEET 2.

IINVENTOR WITNESSES ATTORNEY State of Tennessee, have invented certain I c'anmmam.

1,230, 21, Specification of man Patent. t t 5 1 1 1';

"a utation filed Kay 9, 1910. serial no. cases. To all whom it may cmwem: fuel and air controlling device removed Be it known that I, WILLIAM H. SWAIN, a citizen of the United States, residing at Nashville, in the county of Davidson and new and useful Improvements in Carburetors, of which the following is a specification.

This invention relates to carbureters, and particularly to carbureters for use in connection with internal combustion engines.

The primary object of the invention is to provide means whereby the liquid fuel delivered to the cylinders of the engine from which the latter derives its power will be more completely and perfectly atomized before entering the cylinders.

A. further object of the invention is to provide means for use in connection with a carburetor whereby the explosive charge delivered to the engine cylinders may be more minutely regulated, with regard to richness of mixture andquantity.

A further object of the invention is to rovide improved means for regulating ow of air to the carburetor, the construction comprehending the use of heated air for mixture with the combustible fluid, the improved controlling means making it possible to regulate the temperature of air admitted to the carburetor.

A still further object of the invention is to provide improved means for refining and regulating the flow of combustion liquid to the float chamber before being delivered to the carbureter.

With these objects in view, as well as others which will appear as the description proceeds, the invention resides in the novel combination and arrangement of parts, all as will be described more fully hereinafter, illustrated in the drawings, and particularly pointed out in the claims.

The invention will be best understood by reference to the accompanying" drawings, wherein;

Figure 1 is a sectional view taken through the improved carburetor, float tank, and illustrating in fragmentary elevation the improved means for regulating the carbureter.

Fig. 2 is a top plan view of the improved carbureter, the air delivery being shown in motion. Y

Fig. 3 is a sectional view taken on hne 3-3 of Fig. 2,

4 is a detail perspective view of the from the carburetor,

Fig. 5 is a top plan view of the float tank or chamber, and

Fig. 6 is an elevation, partly in section,

of the controlling lever and illustratingflanged as at 11 to enable the device to be secured to the intake manifold of an internal combustion engine. The outlet portion 10 is also equipped with the usual throttle .valve 12 which may be in any preferred manner controlled from the engine operators osition. The carburetor casing is surroun ed by a jacket 13, and inlet and outlet valves 14 and 15 respectively communicate with the said jacket to control the flow of liquid to and from the jacket. The air intake portion of the carbureter casing is closed at its top and end by a removable member 16, bolts 17 being employed to retain the said member in position uponthe casing. The top plate of this member is provided with a central aperture 18, with which the open end of a supply tube or pipe 19 is adapted to communicate to deliver air to the intake chamber. A slide member 20 is secured to the end of the intake pipe, and is held for sliding movement upon a top plate of the chamber by the brackets or guide members 21. Preferably, the pipe 19 is flexible and leadsfrom a suitable source of heated air, and it is apparent that by shifting the slide block 20 across the top plate of the air intake chamber the volume of heated air delivered to the said chamber will be controlled. When the block has been moved to the position shown in Fig. 2, it will be obvious that Warm and cold air in substantially equal proportions will be delivered to the air intake of the carbureter.

The liquid fuel is delivered to the carbureter through the pipe or duct 22, the latter extending through the lower portion of the carbureter casing at the juncture of the mixing with the air intake chambers. The end of the fluid duct is provided with a removable nozzle 23, the latter projecting upwardly a slight distance from the bottom intake chamber 8, and is of a width at its forward end equal to the width of the carbureter casing. This hood tapers toward its rear' end, and is provided with a rearwardly extending top 26 overhanging and spaced slightly above the fluid delivering nozzle 23. The upper forward edge of the hood member 24 is positioned substantially midway the distance between the front and rear walls of the air intake chamber, and to the said edge is hinged as at 27 a valve plate or proportioning device 28. This plate extends upwardly from its hinge connection with the hood member and' terminates at its free end slightly below thetop plate of the air intake chamber. The hinged ,pintle 27 projects through a suitable aperture in the side of the carbureter casing and has secured thereon a lever 29, to the free end of which is secured one end of a control rod or wire 30, the latter extending through a suitable guide member 31 secured to the carbureter casing and to which one end of a flexible tubing 32 is connected. It is apparent from this construction that the valve plate 28 may be swung rearwardly or forwardly as desired, and when swung to the rearward position the air delivered to the intake chamber will be forced in advance of the valve plate 28 and will flow through the hood member and over the nozzle 23. When taking this course, it is apparent that the fluid within the duct 22 will be delivered to the carbureter in greater quantities, while movement of the valve plate 28 forwardly or adjacent the front member 16 of the intake casing will permit the air to flow directly into the mixing chamber without entering the hood. When the valve is in such position, it is obvious that a less quantity of fuel will be drawn through the duct 22. Proper manipulation of the controlling rod or wire 30 will minutely regulate the flow of air and liquid fuel to the mixing chamber. The mixing chamber 9 is provided in its upper and side walls with angularly disposed baflles or vanes 33, the said "anes projecting into the said chamber and are curved as shown to direct the atomized fuel and air to the center of the mixing chamber. By this means it is seen that a thorough and complete mixture of the air with the fluid is attained. 4

The wire or rod 30 for oscillating the valve plate 28 leads through the flexible tubing 32 to a suitable means located in convenient reach of the engine operator for Inoving'the same. This means comprises a plate'or disk 34 secured to a band 35 adapted to engage around the steering post 36 or other suitable support upon a vehicle. The ring is of the opentype, and the adjacent ends of the same are connected by a bolt 37 whereby thesaid ring may be adjusted to posts of various diameters. Thedisk 34 is provided throughout substantially one-half its circumference with an inwardly extending flange 38, to one end of which the end of the tubing 32 is connected. The wire or rod 30 which is slidable within the tube extends within the channel formed between the flange 38 and the disk 34 of which it is a part. A lever or oscillatingmember 39 is pivoted as at 40 upon the disk 34 and isprovided with an arcuate edge adapted to rotate within the channel beneath the flange 38. One extremity of the lever member is provided with an ear 41 to which the extreme end of the wire or rod 30 is secured, and it is apparent that by oscillating or rotating the lever 39, through its handle 42, the wire 30 will be forced inwardly or outwardly of the tube, thereby delivering a corresponding movement to the valve plate 28. The flange 38 and annular portion of the lever 39 may be provided with suitable in- -dicatin'git'narks as shown whereby the degree of angularity of the valve plate 38 may at once be determined. The disk 34 is equipped with spaced outwardly projecting members 43, through which screws 44 are threaded, the said screws being adapted to limit the throw of the lever handle 42 in each direction.

The float chamber through which the liquid fuel passes before being delivered to the carbureter is indicated generally at 45. This chamber or tank is provided at its lower end with an intake tube 46 which may be connected to a suitable source of fuel supply. The bottom of this duct is equipped with a drain plug or tap 47, and strainers or filters 48 may be arranged between duct 46 and bottom of the tank 45 to thoroughly cleanse the fluid before reaching the tank. These strainers may be of any preferred type, nested relatively fine wire mesh sections being employed in the present instance, which are capable'of being easily removed by grasping the handle 49. A head member 50 is threaded in the tank bottom above the strainers, and is equipped with a port or seat 51, within which the valve rod 52 is adapted to seat. This rod extends throughout the height of the casing and fits at its upper end within an elongated socket 53 formed in a screw-cap 54 in the upper end of the casing. This valve member 52 is capable of moving into and out of contact with the seat 51 to control the flow of fuel supply from the reservoir to the tank 45. A float 55 is arranged within the tank 45 T and 1s provided with a central opening 56 through which the rod 52 extends. A sleeve 57 is secured upon the rod 52 above the float, and loosely receives at its opposite sides the inner ends of levers 58 pivoted intermediate their ends to brackets 59 extending downwardly from the closure member 60 for the upper end of the tank 45. The outer extremities of the levers 59 rest upon the upper end of the float'55, and it is apparent that upward movement of the float will cause the lever 58 to rock upon their pivots and to force the sleeve 57 and rod 52 downwardly to close the valve at the lower end of the casing. As the liquid passes from the tank 45 through 'the duct 22, the float 55 will move downwardly, whereupon the weights 61 upon the free ends of the levers 58 will cause the latter to rock upwardly at their inner ends lifting the valve rod 52 and permitting liquid to flow into the chamber. A spring 62 is interposed between the collar or sleeve 57 and the lower end of the member 54 to maintain the parts in proper position. The member 54 is provided with an annular flange which is notched or milled as at 63, the said notches or milled portions being yieldably engaged by a spring 64 secured to the closure member 60 of the tank. By rotating the nob 54 the same will be screwed into or out of the top plate 60 accordingly as the same is rotated, and the tensile strength of the spring 62 will accordingly be increased or diminished. The spring member 64: maintains the cap 54 in proper position. The cover 60 for the tank 45 is removably secured thereto in order that the parts within the tank may be readily accessible.

In operation, the operating handle 12 upon the steering post is moved to such position as will enable the air admitted to the intake chamber to pass forwardly of the valve plate or the proportioner 28 and through the hood 24. This rush of air through the restricted rear end of the hood creates lifting pressure within the duct 22, whereupon the fluid therein is forced upwardly and is completely atomized by mixture with the rushing air across the end of the nozzle 23. The baflle vanes 33 direct the rushing air centrally of the mixing chamber 9, whereupon a whirling action takes place to thoroughly vaporize and mix the charge before being delivered to the manifold or engine cylinder. The quantity of the mixture to be delivered to the combustion engine mav be readily controlled by the throttle valve 12. Should it be desired to refine the mixture, the operating-handle 42 may be actuated to move the plate or proportioner 28 into such position that a portion of the air delivered to the air chamber will pass behind the plate 28 and A will not contact with the end of the nozzle 23. It is thus seen that the pressure upon the nozzle end is reduced and obviously the delivery of liquid therethrough lessens. As conditions require, the slide block 20 attached to the end of the air tube 19 may be moved .within the guides 21 to govern the temperature of the air flowing to the air intake chamber 8. It is thus seenv that a comparatively simple means is provided for thoroughly va orizing the air and atomizing the liqui delivered from the float chamber. It is also apparent that the various movable parts of the carburetor are capable of being at once actuated to vary the mixture within the carbureter.-

While the above is a disclosure of the preferred embodiment of the invention, I am aware that the device is susceptible of various changes in the minor details of construction and arrangement of parts without departing from the spirit of the invention, and I reserve to myself the ri ht to make such changes as may be deeme practicable without departing from the spirit ofthe invention or exceeding the scope of the claims.

I claim:

1. In a carbureter, a casing having intake and mixing chambers, a fuel delivery nozzle projecting into said casing, a hood inclosing said nozzle and communicating at its forward end with said intake chamber, the rear end of said hood being restricted, a valve plate hinged to the other end of said hood and extending into and transversely of the intake chamber, and means for moving said plate, substantially as described.

2. In a carbureter, a casing, a nozzle projecting into said casing, a hood in said casing inclosing said nozzle, one end of said hood being restricted, a plate hingedly connected to the other end of said hood and having its side edges fitting closely to the sides of said casing, and means for moving said plate, substantially as described.

3. In a carbureter, a casing, a nozzle projecting into said casing and disposed slightly above the bottom thereof, a hood inclosing said nozzle and having its upper wall disposed below the upper wall of said casing, the ends of said hoo'd being open, a plate hinged to the upper wall of said casing at on end thereof and being adapted to permit air to flow either through or over said hood, and means for moving said plate, substantially as described.

In testimonv whereof I aflix my signature in presence of two witnesses.

WILL H. SWAIN. Witnesses:

ALBERT E. SPANGENBERG, W. ERNEST HANNON.

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