US1461630A - Air-cleaning device - Google Patents

Description

C. R. SHORT ET AL AIR CLEANING DEVICE Filed Nov. 17l 1919 Patented July lill?, E23.

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`CHARLFS It. SHORT AND ARTHUR L. CASH, OF DETROIT, MIQHIGAN.

AIR-CLEANING DEVICE Application lled November 17, 1519. Serial No. 838,723.

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Be it known thatl we, CHARLES R. SHORT and ARTHUR L. CASH, a subject of the King of Great Britain, and a citizen of the United States, respectively, and residents of Detroit, county of Wayne and State. of Michigan, have invented certain new and useful Improvements in Air-Cleaning Devices, of which the following is afull, clear,

concise, and exact description such as will enable others skilled in the art to which the invention relates to make and use the same, reference being made thereinto the accompanying drawings, which form a part of this specification.

Our invention relates to air cleaning devices designed for use in connection with internal combustion engines to prevent the entrance of dust or dirt into the carbureter, and from thence into the working cylinder ofthe engine;` and particularly to air cleaningedevices nf thelcentrifugal type and in which thepflowof air through the same is unobstructed as bythe use of screens, or by the presence of a body of water through which the air flows, as has hereto fore commonly been the case in air cleaning devices. Such air .cleaning devices are used extensively with tractors designed for 'use in hauling agricultural machinery, in which service the dust present in the air causes abrasion of the pistons and cylinders,y and a rapid wearing out of the engine, if it is permitted to pass through and into the same.

The object of our invention is to the carbureter rovide an improved air cleaning device of t e centrifugal type which will be simple in construction and effective for the purpose of separating dirt from the air which passes through the same and to the carbureter; the

said device having features of construction and operation whereby the dirt is more effectively separated from the air, and a cleaner supply of air secured for the 'carbureter of the engine, than4 has heretofore commonly been the case.

Our invention is. illustrated in its preferred form in the drawingv accompanying and forming a part of this specification;

altho it will bey appreciated that the drawing is for illustrative purposes only,v

elevation, the same being equipped with our improved airA cleaning device.

Figure 2 is a view showing the engine and air cleaning device in elevation, and as seen from a position to the left ofFigure 1. Figure 3 is a view showing the lower end of the air cleaning device in section and upon a larger scale than in Figure 1. Figure 4 is a view showing a vsection upon a transverse plane indicated by the line 1 -4, Figure 3. l

Figure 5 is a view showing a section upon' a transverse plane indicated by the lines 5 5, Figure 1, and upon a larger scale than in said figure.v

Referring to the drawing, reference numeralv 6 designates in a conventional manner an internal combustion -engine of any kind or type to which combustible mixture is supplied through an inlet manifold 7 leading from` av carbureter 8 of any preferred form. The engine as shown 1s provided with a fan 9, the purpose-Bf which is Atocause air to flow past the engine to thereby cool or assist 1n cooling same, as' is usual in internal combustion engine practice, the fan .being driven from Athe crank shaft 10 through a suitable belt 11.

Our improved centrifugal air cleaning device comprises a casing 12 which is prefelrably of approximately circularv form in ross-section, and which casing isshown as arranged in an inclined position with its inlet end 13 located adjacent the fan 9, so that the fan will tend to force air'into the casing under slight pressure. The inlet end of the casin is preferably provided with a flaring or unnel shaped portion 14 surrounding the same, to thereby collect air from the stream of air established bythe i 1 ing devices.

Having thus described and explained ur invention, we claim and desire to .secure by Letters Patent: Y

1. In a centrifugal air cleaner, an' elongated casing approximately circular in cross-section and having an air inlet opening at one end. 'and an air outlet opening of less cross-sectional area than said casing at the other end thereof, and which casing is provided'with a slot'extending longituaiinally and throughout the entire length thereof; .and a spirally arranged member -located within' said casing and extending throughout a. part only of the length thereof, and -which member is adapted to impart rotary motion to 'air flowing through said casing; said spirally arranged member being located adjacent the inlet .end'-"of`s'ad""dinally and throughout approximately the A casing whereby an internal chamber is vpro- Yao ` tion located within said casing and adapted to impart rotary motion to air flowing. therethrough; an internal chamber locatedvided adjacent the out-let end of said casing.

2. In a centrifugal air cleaner,fan elongated casing having an air inlet opening at one end thereof, and which casing is provided with a slot extending longitudinally thereof; a spirally 4formed partition located within said casing'and extending throughout a part only of the length thereof,

whereby a chamber is-provided within said -casing and beyond the end of said partition and which partition/ is adapted to impart rotary motion to air flowing through said casing; and an air outlet conduit extending into the chamber aforesaid at the end of said casing opposite Vsaid air inlet and having an opening through which air may flow, the area of said air outlet conduit being less than the area of said casing.

3. In a centrifugal air cleaner, an elongated casing lhaving an air inlet opening at one end thereof. and which casing is provided with a slot extending longitudinally thereof; a spirally arranged partiadjacent vthe. outlet end of said casing and an air outlet conduit.v extending -into said chamber an`d spaced apart from the peripheral wall thereof and having an' opening p' 'through which -air may flow lfrom said chamber, the 'portion 'of said outlet-conduit.

Within said chamberbeing conical 'in form Vand spaced vapartlfrom the wall thereof.

4. In a centrifugal `air cleaner; an elongated casing approximately {circular-1 in cated within said casing and extending.

throughout a part only of the length thereof, rand which member is adapted to impart rotary motion to air flowing through vsaid casing; and an air outlet conduit extending into the end of said casing opposite said air inlet and hav'ing'an opening in its side walls through which air may flow from said easing, said conduit being conical in form V Within said. casing and the wall thereof being spaced apart from the wall of said casmg. v v

5. In combination in' an internal combustio'n engine having a fan for causing air yizo-"flow past the same, al centrifugal a1r entire length thereof; and through which air may flow directly to the surrounding atmosphere and a spirally arran ed member loca-ted within said casing an extending throughoutl a part only of the length thereof, and which member is adapted to impart rotary motion tothe airflowing through said casing.

6. In combination with a carbureter, air supply means therefor' 4includin a conduit in which the air flows in a whir ing stream to thereby separate impurities therefrom, said means including an air conduit having a lateral intake -opening projecting into said air streamnear the center thereof, and a permanently open communication between the periphery of said stream and the surrounding atmosphere.

7. In combination 'with a carbureter, air supply means therefor including a conduit in which theair flo-ws in a whirling stream to thereby separate impurities therefrom, said means, including an air conduit having A a laterally perforated substantiallyconical l'supply means therefor including a casing through, which the air advances toward the carbureter in a whirling stream, said casing being arranged with its axis disposed at a considerable'augle to thel vertical, said casing also having a narrow slot along vits underl side in permanently open communication with the surrounding atmosphere andY through which impurities are discharged by centrifugal action.

cross-section and having an air inletopen- Y 9.` In combination with av carbureter, air

"supply means therefor including an inclined conduit along which air flows toward the carbureter, means within that portion of the conduit most remote from the carbureter for directing the air in a spiral current, said means terminating considerably short of the carbureterisaid conduit having provision for the discharge of impurities laterally from the air current by centrifugal action, directly to the surrounding atmos 5 phere and an axially arranged conduit smaller in diameter than said first named conduit and through which purified air passes from the` end p'crtion of 'the first named conduit `I1earest the carbureter to said carhureter. )10

In testimony whereof We aHX our signa-

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