US2448420A - Exhaust spark arrester - Google Patents

Description

Aug-31,1948 H. E. DAVIDSON 2,448,420

EXHAUST SPARK ARRESTER Filed May 6, 1944 2 Sheets-Sheet l.

12 5 4 g v I I Z Aug; 3 1948. H. E. DAVIDSON 2,448,420

C EXHAUST SPARK ARRESTER v Filed May 6, 1944 2 Sheets-Sheet 2 mul Hillllll [270i 7 n zucnfofb Patented Aug. 31, 1948 EXHAUST SPARK ARRESTER Harvey Ellis Davidson, Tulsa, Okla, assigiior to Bethlehem Steel Company, a corporation" of Pennsylvania.

Application May 6, 1944, Serial No. 534,507

3 Claims. (01. 183-582) My invention relates to a device for attachment to the exhaust outlet of an internal combustion engine, and more particularly to a device for separating dangerous sparks and hot carbon particles from the exhaust gases of such an engine.

Much of the power used inoil fields, for example, is providedby internal combustion engines. The exhaust gases from these engines usually contain large and small pieces of carbon which are often incandescent. If these come into contact with inflammable materials or gases, a fire may result. Hence, it is requisite in the interest of safety to cool the gases and remove the carbon before the exhaust enters the open air, and it is desirable in general to minimize the engine exhaust noise.

One object of my invention, therefore, is to provide simple and dependable means of extracting carbon inclusions from exhaust gases.

Another object is to provide a safe device for cooling said gases.

A further object is to provide substantial means for muifling exhaust noises.

Other objects, advantages and purposes of my invention will appear hereinafter in the specifi cation and in the appended claims, and in order to describe the invention more clearly I shall now refer to the annexed two sheets of drawings forming a part of this specification and in which like figures of reference indicate like parts.

Figure 1 is a bottom plan view of my invention;

Fig. 2 is a side elevation of the invention;

Fig. 3 is a vertical section taken along the line 3-3 of Fig. 2; and

Fig. 4 is a vertical section along the line 4-4 of Fig. 2.

As shown in said drawings the device is constructed of metal sheets or plates which are shaped and welded together in understood manner, and comprises a horizontally disposed tubular casing I, closed at the ends 2 and separated by vertical walls 3 and 4 provided with round central openings 5 and 6 into three intercommunicating compartments 1, 8 and 9. The larger middle compartment 8 is provided with a tangential vertical inlet Ill directed upward toward a constricting baflie l I. Semi-circularly about the openings 5 and 6 and extending horizontally from the casing l in ach of the smaller end compartments 1 and 9 are the scrollor J-shaped whirler plates [2 and I3, disposed substantially as shown to reverse the direction of gas flow. The peripheral discharge openings M and I5 of said end compartments 1 and 9 communicate with an external discharge chamber or exhaust box IE I extending lengthwise of the tubular casing I and provided with a horizontally disposed central outlet l1.

The bottom wall of the tubular casing! is provided with slot-like openings l8 l9 and extending lengthwise of the casing, portions of said bottom wall being bent upwardly opposed to I exli austs into the two end compartments 1 and 9 through the openings 5 and '6 in walls 3 and 4. The heavier carbon particles fol-low the wall of the casing and drop into the middle trough 24 when intercepted by the lip 22. In said end compartments 1 and 9 the curved whirler plates I2 and I3 divert and reverse the circumferential flow of the gases, causing the remaining lighter particles of carbon, intercepted by lips 2| and 23, to drop in similar manner into the end [troughs 24, from any of which troughs 24 the accumulated carbon may be easily removed when desired by taking out the pipe plugs 25, 26 or 21. Passing through discharge openings l4 and IS, the cleaned, cooled and quieted gases reunite in the exhaust box l6, from which through the outlet I 1 they finally emerge into the atmosphere.

Although I have hereinlabove shown and described my invention in considerable detail, I do not wish to be limited to the exact and specific structure shown, but may use such substitutes, modifications or equivalents thereof as are within the scope and spirit of the invention and of the appended claims.

My invention having been thus described, what I claim as new and useful and desire to secure by Letters Patent is:

1. A spark arrester for exhaust gases, comprising a horizontal unitary cylindrical casing, a plurality of intercommunicating compartments in said casing, Ia tangential inlet to admit exhaust gases to one of the compartments and to impart a whirling motion to said gases therein, means for assisting the whirling gases to pass therefrom into adjoining compartments, means in said adjoining compartments for reversing the direction of the moving gases, means for collecting canbon panti-cles beneath the casing, an exhaust box for receiving the spent gases and a tangential outlet for releasing said gases.

2. A spark arrester for exhaust gases, comprising a horizontally disposed cylindrical casing, a pair of annular spaced partitions forming a middle compartment and two communicating en-d compartments therein, a restricted tangential orifice for admitting andcircumcf-erentially directing the gases into the middle compartment, an upturned whirler plate in each end compartment for reversing the direction of gas flow therein, and a rear exhaust box for receiving the gases from the end compartments and discharging them to atmosphere.

3. A spark arrester for exhaust gases, comprising a horizontal cylin-dricalcasing, la large central compartment in said casing, a small-er compartment at each side of the large central compartment and communicating therewith, a

vertical tangential inlet to the central compartmemt to admit the gases, a constricting bafile plate above said inlet to accelerate and impart a whirling motion to the gases, a J-shaped whirler plate in each-end compartment adapted to reverse the direction ofwhirling motion therein, a longitudinal slot in the bottom of each compartment, a raised lip at each slot to intercept and direct downward canbon particles, a longi= tudinal trap beneath each slot for collecting said carbon particles, a plug for cleaning each trap, a discharge opening in each end compartment, an exhaust box communicating with the discharge openings and lengthwise of the cylindrical casing wherein the gases reunite, and a horizontally disposed cent-cal outlet for releasing the gases from said exhaust box.

V HARVEY ELLIS DAVIDSON.

REFERENCES CITED Thefollowing references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 452,580 Morse May 19, 1891 535,099 Gale et a1 Mar. '5, 1895 696,604 Stebbins Apr. 1, 1902 "775,944 Stebbins Nov. 29,1904 1,620,241 Steb=bins Mar. 8, 1927 1,787,079 Lykken Dec. 30, 1930 FOREIGN PATENTS Number Country Date Great Britain 1885

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