US1329545A - Air-feed for carbureters - Google Patents

Description

D.- PLAVSA.

AIR FEED FOR CARBURETERS.

APPLICATION FILED OCT. 16, 1919.

1 29,545 Patented Feb. 3, 1920.

2 SHEETSSHEET I.

Svwewfoz D. PLAVSA.

AiH FEED FOR CARBURETERS.

APPLICATION FILED OCT. 16. 1919.

1 29,545 Patented Feb. 3, 1920.

2 SHEETSSHEET 2.

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UNITED STATES PATENT OFFICE.

DUJO PLAVSA, OF GLOBE, ARIZONA ASSIGNGR O1 ONE-HALF TO STEVE ANDROVICH,

OF GLOBE, ARIZONA,

AIR-FEED .EGl't CARB URETERS.

Application filed October 16, 1919.

To all whom it may concern:

Be it known that I, DUJO PLAvsA, a citizen of Jugo-Slavia, having declared my intention to become a citizen of the United States of America, residing at Globe, in the county of Gila and State of Arizona, have invented certain new and useful Improvements in Air-Feeds for Carbureters, of which the following is a. specification.

The primary object of the present invention resides in the provision of a controlling device for the admission of air to a carbureter whereby greater eiiiciency in the operation of an engine provided with the carbureter will be obtainable.

A further object of the invention consists of a closure cap for the air intake of a carbureter with oppositely opening flap valves carried at opposite sides thereof, one of which is adapted to be opened to permit air to be fed to the carbureter with the opposite valve closed, and with the valves reversely operating should the engine back fire through the carbureter.

With the above general objects in view and others that will become apparent as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts to be hereinafter more fully described and then claimed reference being had to the accompanyin drawings by like characters designating corresponding parts throughoutthe several views, and in which,

Figure 1 is a side elevational view of a carbureter with the present invention in operative position thereon,

Fig. 2 is a top plan view of the same,

Fig. 3 is a view similar to Fig. 1 with a portion of the air control device and a portion of the carbureter shown in vertical section, the fiap valves being in closed position,

Fig. a is a fragmentary View, partially in section showing the air inlet valve in open position,

Fig. 5 is a view similar to Fig. 1 with the air inlet valve closed and the diametrically opposite valve open, and

Fig. 6 is a cross sectional view taken on line VIVI of Fig. 1 showing the bail for limiting the opening movement of one valve and providing a stop for the other valve.

The present invention relates more par- Specification of Letters Patent.

Patented Feb. 3, 1920.

Serial No. 331,139.

ticularly to devices for controlling the sup ply of air to a carbureter and includes a short pipe section closed at one end with the open end thereof received on the air intake pipe of a carbureter and securely retained against displacement. A pair of openings are provided in diametrically opposite sides of the pipe section and are closed by flap valves opening in the same direction,.one

being contained within the pipe and the other one exteriorly positioned thereof, the inwardly positioned valve being adapted to be opened upon the creation of a vacuum in the carbureter for the admissionof air to the pipe while the exteriorly positioned valve is closed. Should the engine, to which the carbureter is attached,.have a charge of gas therein prematurely exploded, the back fire passing to the carbureter Will close the inwardly positioned valve and escape through the outwardly positioned valve,the opening movement of which is controlled by a bail embodying a portion overlying the outer valve and having a part thereof extending transversely of the pipe for engagement by the inwardly positioned valve to constitute a limiting stop therefor.

Referring more in detail to the accompanying (:lrawings, there is illustrated a carbureter 7 of ordinary construction having an air inlet pipe 8 freely open at its outer,

end as illustrated in Fig. 3, the carbureter having the usual fuel supply 9 fuel control device 10 and air regulator 11 and a throttle .12, while the lower end of the carbureter is provided with a drain cook 13.

The air supply to the carbureter includes a pipe section 1 1 closed at one end as at 15 with the open end thereof telescopically receiving the carbureter air inlet 8 and retained in sealing contact therewith by the band 16, the pipe 8 having an unobstructed communication with the interior of the pipe 14:. At diametrically opposite sides of the pipe 1 1, preferably at the lower and upper sides thereof are formed openings 17 and 18 respectively, the opening 17 being closed by a flap valve 19 positioned interiorly of the pipe 14 and pivoted thereto as at 20 adjacent one end of the opening 17 so that when the flap valve 19 is in closed position as indicated in Figs. 3 and 5 the opening 17 will be entirely closed, it being noted that the flap valve 19 is curved transversely c0incident t0 the curvature of the pipe 14. In order to permit the escape of gases upon a back firing of the engine, the flap valve 21 for the opening 18 is positioned exteriorly of the pipe 14 and is pivoted thereto as at 22, the flap valve 21 being transversely curved relative to the pipe 14 to engage the same throughout its width as shown in Fig. 6. A bail 23 is curved about the upper side of the pipe 14 and overlies the flap valve 21 to limit the opening movement thereof as indicated in Fig. 5, the bail 23 including a horizontal portion 24 extending transversely of the pipe 14 to be engaged by the valve 19 to limit the opening movement of the valve, it being obvious that the single bail performs the double function of a stop for the two valves.

From this description of the device it is thought that the construction and operation thereof will at once be apparent, it

being noted that suction created in the engine causesthe feeding of air to the carbureter 7 through the valve controlled opening '17 in the pipe 14, the valve being limited in its opening movement by'engaging the horizontal portion 24 of the bail, and re turnable to its seat by its own weight upon the absence of the vacuum in the carburetor. Should the gas in the engine be prematurely ignited, the expansion thereof or back fire would pass through the carbureter 7 and into the pipe 14, closing the valve 19 and escaping through the opening 18, forcing the flap valve 21 to its open position as shown in Fig. 5 with the valve limited in r its opening movement by engagement with the bail 23 as illustrated.

While there is herein shown and described the preferred embodiment of the invention, it is to be understood that changes may be made as to minor details, of construction which will fall within the scope of the invention set forth in the subject matter hereinafter claimed.

That is claimed as new is 1. Means for controlling the admission of air to a carbureter comprising a pipe closed at one end with the open end adapted to be secured to the air intake pipe of a car bureter, valve controlled openings in said pipe, a bail including aportion overlying one of said valves to limit the opening movement thereof, and a part of said bail extending transversely of said pipe for limiting the opening movement of the other valve.

2. Means for cOntrolling the admission of air to a carbureter comprising a pipe closed at one end with the open end adapted to be secured to the air intake pipe of a carbureter, said pipe having diametrically opposite openings therein, a flap valve associated with each opening, said valves swinging in the same direction with one valve arranged interiorly of the pipe and the other valve exteriorly thereof, and a single bail adapted to be engaged by said valves for limiting the opening movement thereof.

In testimony whereof I affix my signature;

DUJO PLAVSA.

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