US1272895A - Carbureter for gas-engines. - Google Patents

Description

T. G. BEEDE.

CARBURETER FOR GAS ENGINES. APPLICATION FILED MAR. 21;!917.

11 %?2,%m Patented July 16, 1918,,

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0F YOUNGSTOWN, OHIO.

CARBURETER FOR GAS-EN GIN ES.

Specification of Letters Patent.

Patented July 16, 1918.

Application filed March 21, 1917, Serial No. 156,273.

4 and useful Improvements in Carbureters for Gas-Engines, of which the following is a specification. a i

This invention relates to a carbureter for gas engines. The principal object of the invention is to provide an improved form of carbureter wherein I haveprovided a primary jet cap located immediately above a needle valve in combination with a fuel intake portion of carbureters.

Other objects and novel constructions of my carbureter are set forth in detail and claimed in combination with other parts of the carburetor;

lVith the above and other objects in view the invention consists in general of certain novel features of construction, combinations,

and arrangements of parts as will be herein-.

after fully described, illustrated in the accompanying claimed.

In the accompanying drawings like charactersof reference indicate like parts in the several views, and v Figure 1 is a vertical median section through a carbureter constructed in accordance with this invention.

Fig; 2 is an enlarged vertical median section through the primary jet portion of the carbureter. i

F jg. 3 is a top sectional view taken on the line AA of Fig. 2. I

Fig. 4 is a vertical median section through the secondary jet of the carbureter.

5 is a top plan view ofthe cover plate coverin the float chamber and fuel bowl.

The body of the carburetercomprises a bowl-shaped fuel bowl and float chamber 1.

Within said'chamber 1 is located an ordinary circular float 2 which is attached to a float lever 3 by means of a screw 4. This float lever 3 is pivoted at point 5 by being firmly attached to the wall of a side projection 6 of the above described chamber 1.

The other end of the float lever 3 is hinged to the upper end of valve stem 7. When the fuel in the bowl fills to a desired depth a valve 8 is forced downwardly into an intake fuel channel 9 thereby cutting off temporarily the fuel coming fromthe intake pipe drawin and s ecificall s P y y 10 until such a time as the fuel in said chamv ber v1 is sufficiently lowered to cause the float 2 to open the valve 8.

The aforesaid chamber 1 is fitted with a circular cover plate 11 provided with a venturi 12 formed in the circular'cover plate 11 at its central portion. This venturi 12 has a circular flange-shaped projection 13 being a portion of. the venturi 12. The

greater portion of the venturi 12 extends below the cover plate 11. This venturi 12 is funnel-shaped having the smaller diameter at its bottom. venturi 12 extends a slight distance over a primary. jet cap 14. This primary jet cap 14 is a circular cap which is threaded to the extended wall of a needle jet casing 20. This cap is provided with a central bore forming an air chamber 30. In this primary jet cap 11 il'nmediately above a needle a number of channels 32 radiate to the circumference. of the needle cap 11 through which the atomized fuel is drawn.

'On the lower sideof the cover plate 11 is formed a circular flange 15 provided with The lower portion of thethreads on its inner surface into which threaded a cone-shaped air chamber 16. the base of said air chamber 16 being provided .with a circular downwardly extending portion 17 having a circular channel 18 extending through its central portion. The upper portion 19 of'saidchannel 18 is greater in diameter than the remainder of said channel 18. T Into this channel 19 is inserted a circular needle jet casing 20 having a flange 25 provided with a center bore 21 into which extends a needle 22 extending upwardly in the center bore 21. The needle jet casing 20 is securely held against-a seat 23 by being threaded into the upper portion of the channel 18 at point 21. The flange 26 in turn is fitted against the bottom 27 of the air chamber 1 Radiating from the air chamber 19 is a channel 28 turning downwardly at right angles near the OlICUITIfBI'GDCG of the circu lar portion 17. Through this channel 28 air taken into the air chamber 19 and then through holes 29 of the extended walls of the needle jet casin 20 allowing the air to pass into an air chamber 30 having a domeshaped top with an opening 31 surrounding the upper portion of the needle jet casingQOl In operation the air passes into the channel 28 then into the air chamber 19 then through the channels 29 into the air chamatomized fuel then passes upwardly through the venturi 12 being again mixed by air from the air chamber 16, the air entering said chamber 16 by holes 33 which are located around the upper portion of the venturi 12' and which extend through the circular cover plate 11. See Figs. 1 and 5. I

The fuel 'mixture is drawn upthrough the auxiliary air valve 34 which consists of a round wire coil spring the walls of which extend toward the top firmly fastened at the bottom to the circular flaring flange 13. At the top this auxiliary air valve 34 is attached within a circular band 35 whose circumference slides within a supply pipe 36 so that when the suction is increased or decreased the auxiliary air valve 34 will allow air and fuel to enter be -tween the coils in accordance with the degree with which the fuel is drawn into the supply pipe 36.

The circular downwardly extending portion 17, of the air-chamber 16 at its lower end passes through an opening centrally lofloat chamber 1. The flange 37 fits into a seat 38 and is firmly held in position by means of a lock nut 39. The needle 22 is provided with a threaded lower end 40 which threads into the lower end of the channel 18.

A gland 41 fits around the wall 42 in and which is The air chamber 46 'is' fast ened to the top of the fuel bowl and float chamber 1 by means of screw 47. A strangle valve 48 5 is located Within an air intake pipe 49. A throttle valve 50 is located within the supply pipe 36 and is controlled by a throttle lever 51. -The carbureter is attached to the intake pipe10 by means of a coupling 52.

tion to the exact form'herein shown, but

it is wished to include all such as properly-v come Within the scope of the appended claim.

What I claim as new is In a carbureter, the I combination of a primary jet located within an air chamber Y centered within a fuel bowl, a venturi located directly above said primary jet, an auxiliary-air valve consistin -of a closely wound wire coil spring attached to the upper portion of the venturi, a circular band slidably fitted within a supply pipe, the upper portionof theabove described auxiliary air valve firmly fastened to the circular band, an air chamber surrounding saidauxiliary air valve, a needle jet casing, a

fuel inlet channel, for said needle jet casca't ed in the bottom of the fuel bowl and ing, an air chamber surrounding the lower portion of said needle jet casing, anair channel connected to said air chamber. channels extending upwardly through the extended wall of the needle jet casing connecting the said lower air chamber with 'an upper air chamber which surrounds the needle jet casing at its upper portion, a primary jet cap provided witha circular inverted cup, channels radiating from said cup substantially as described for the pose set forth.

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

THEODATUS G. BEEDE.

Witnesses.

F. E. CAILoR, FLORENCE BAEHLER.

"the material principles thereof, and it is therefore not wished to confine the inven

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