US 3254477 A
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Description (OCR text may contain errors)
June 7, 1966 J. B. ROGERS, JR
SPARK ARRESTER Filed Nov. 5, 1962 IN VEN TOR. `Jo/m Rogers, Jn BY A TTOR/VEY United States Patent O 3,254,477 SPARK ARRESTER .Iohn B. Rogers, Jr., 1209 Summit, Muskogee, Okla. Filed Nov. 5, 1962, Ser. No. 235,481 2 Claims. (Cl. 55-293) This invention relates to improvements in spark arresters and, more particularly but not by way of limitation, to a spark arrester for utilization with diesel locomotive engines, and the like.
Diesel locomotives are used almost exclusively in this country today by railroads and travel extensively throughout the entire country. The exhaust gasses from these diesel locomotives usually contain burning or extremely hot embers, some of which are small but many of which are relatively large. While the smaller burning particles or embers normally burn themselves out ybefore falling to the ground, the larger particles are often still burning when they strike the ground. As a result, many res are started as these locomotives pass through the countryside. This is a particular hazard when the locomotive is passing `through pasture country, such as found in vast expanses in some of the midwest and western parts of this country. The lires thus started have resulted in great expense to the railroads in reimbursing property owners for burned crops, houses, livestock, and the like, and many efforts have been made to reduce the hazard.
Some devices have been developed which direct the exhaust gasses through .a rather tortuous path in an effort to cool down these sparks or embers before the discharge thereof. However, these have not been too successful since, regard-less of the path of travel, some of the large embers still escape and resulting fires are experienced. Still other devices have been utilized wherein a grid is provided for breaking the particles into rela-tively small sized pieces which will completely burn or cool down sufliciently before striking the ground, thus reducingthe fire hazard. The theory behind this appears to be sound, but in actual practice the grids soon become clogged and greatly reduce the passage of the exhaust gases therethrough. It will be apparent that this stoppage, or reduction of the exhaust gas 4oiw results in a loss of efiiciency for the engine and as a result, these grids must be frequently removed and cleaned. The disadvantages of these devices will be readily apparent.
The present invention contemplates a novel spark arrester utilizing the principle of breaking up the escaping embers into small particles, and is particularly designed and constructed to eliminate the clogging of the grid or breaking element. The novel spark arrester comprises a housing portion adapted to be secured over the exhaust opening of the locomotive engine whereby the exhaust gases will be directed through a flexible grid member which undulates constantly during operation of the diesel engine. The flexing or .articulation of the grid member provides a self-cleaning action therefor to prevent clogging as the broken embers or exhaust gas particles move therethrough. Any large embers that are not suiiiciently broken up lby the grid member or breaker element are knocked downwardly and are not permitted to escape from the device, thus only those particles suiciently small to avoid the danger of starting the res are` permitted to escape from the spark arrester. In addition, it has been found that the content of vthe escaping exhaust gasses provides a lubricating quality for greatly reducing any wear of the articulate Igrid member which might otherwise result from the inherent action thereof.
It is an important object of this invention to provide a yspark arrester for a diesel locomotive engine, or the like, wherein the exhaust gasses are directed through .a breaker element for precluding the discharge of relatively large burning embers.
Y v3,254,115?? Patented Jurre 7, 1956 ICC It is another object of, this invention to provide .a novel spark arrester having an articulate grid member so designed and arranged as to preclude clogging thereof during opera-tion.
Another object of -this invention is to-provide a novel spark arrester wherein the properties jof the exhaust gasses passing therethrough provide a lubrication for the breaker element during operation thereof.
Still `another object of this invention is to provide a novel spark Aarrester for precludiug discharge of relatively large burning embers from the exhaust of Va diesel engine or the like, without hindrance to the efficient operation of the engine. l
Still another object of this invention is to provide a novel spark arrester which is simple and eicient in operation and economical and durable Vin construction.
Other .and further objects and advantageous features of the present invention will hereinafter more fully appear in connection with a detailed description of the drawings in which: I
FIGURE l is a plan view of -a spark arrester embodying the invention with portions thereof broken away for purposes of illustration.
FIGURE 2 is a front elevational view of aspark arrester embodying the invention with portions thereof broken away for purposes of illustration.
FIGURE 3 is a perspective View of a spark arrester embodying the invention as shown when the invention is idling or not in use.
FIGURE 4 is a view similar to FIGURE 3 depicting the spark arrester during operation of the engine.
FIGURE 5 is an enlarged plan view of a portion of a grid element such as may be utilized in the invention.
Referring to the drawings in detail, reference character 10 gener-ally indicates a spark arrester comprising a bottom plate or foundation 12 having a centrally disposed transversely extending elongated opening 14 provided therein. A pair of upstanding side plate members 16 and 18. are rigidly secured to the opposed sides of t-he plate member 12 in any suitable manner (not shown) or may be formed integrally therewith, if desired. A plurality of partition members 20` .are interposed between the side plates 16 and 18 and secured to the plate in any suitable manner. As shown herein, only one of .the Vplate memf bers 20 is utilized for providing a pair of chambers 22 and 24 between the side plates 16 and 18. However, it will be apparent that substantially any number of the partitions 20 may be utilized to provide as many chambers as required. As la practical matter, it has been found that two of these chambers result in a very efficient operation for the spark arrester 10 as will be hereinafter set forth.
A pair of spaced stud members 26 and 28 extend between the side plates 16 and 18 and .are preferably disposed in the proximity of the opposed ends thereof as clearly shown in the drawings. It is preferable to provide la spacer sleeve 30 for the portion of the stud 26 lying within or extending through the chamber 22 and a similar sleeve 32 for that portion of the stud 28 extending through the chamber 22 whereby the two sleeves 30 and 32 vare in substantial valignment for receiving a flexible grid member or breaker element 34 thereover. In .a simil-ar manner a spacer sleeve 36 is preferably provided for that section of the stud 26 extending through the chamber 24 and a similar sleeve 38 may be provided for the portion of the stud 28 extending through the chamber 24 and in alignment with the sleeve 36 for receiving a second grid member or breaker element 40 thereover.
The grids 34 `and 40 are substantially identical and are of a flexible construction as will be hereinafter set forth and a detailed description of the grid 3'4 will apply similarly to the grid 40. One end of the grid 34 is secured.
adjacent to the upper surface of the base plate 12 in any suitable manner such as a bar or plate member 44 and a plurality of bolts 46 co-operating with an upstanding flange member (not shown) secured to the base member 12. If desired, a transversely extending shaft member (not shown) may be provided adjacent to the plate 12 between the side wall 16 and partition 20 for cooperating Iwith the plate 44 and bolts 46 to retain the grid 34 in connection with the base plate 12. The grid 34 extends upwardly from the base 12 and is secured around a portion of the outer periphery of the sleeve 32 in any suit- `able manner, such as by a cotter pin, or the like (not inafter set forth, and as shown in FIGURE 3 at 47. Thev grid 34 is similarly secured around a portion of the outer periphery of the sleeve 30 as around the sleeve 32 and extends downwardly therefrom tothe base 12 for connection adjacent the base in a manner as hereinbefore set forth for the end 42 thereof. This provides an articulate type arrangement for the flexible grid 34 wherebythe loosely hanging portion 47 thereof disposed between the sleeves 30 and 32 may fluctuate or undulate during operation of the engine.
The grid 40 is similarly secured adjacent to the base by a suitable bar or plate member 48 and bolts 50 and the upstanding flange (not shown) provided on the base `12, and extends upwardly therefrom to the sleeve 38. The grid 40 extends around a portion of the outer periphery of the sleeve 38 and is secured therearound as hereinbefore set forth and is loosely disposed between the sleeves 36 and 38 wherein the portion 51 therebetween lwill sag as shown in FIGURE 3 when the engine is not in operation. The grid 40 is secured around a portion of the outer periphery of the sleeve 36 and extends downwardly therefrom for connection adjacent the base 12, as hereinbefore set forth.
The grid 34 is preferably constructed from wire cloth material or belting of any suitable well known type, such as often used in conveyor devices, and the like. This belting or wire mesh material is of a metallic construction having heat resistant characteristics whereby the heat of the exhaust gases is not detrimental thereto. The general configuration of the belting material preferably comprises a plurality of spaced rigid wires 52 bound together by a plurality of spaced angular wires 54 as shown in enlarged detail in FIGURE 5. Each adjacent pair of wires 52 are joined together by one of the angular or joining wires 54 in such a manner that the rigid wires 52 and angular wires 54 extend transversely thereacross between the side plates and partition, and the angular wires 54 cooperate with the rigid wires 52 to provide freedom of movement or fluctuation longitudinally in the ,chambers 22 and 24. Of course, sufficient clearance is provided between the side edges of the grid and the adjacent partition and side plate to permit freedom of movement of the grid during operation of the device without permitting escape of any large embers therebetween.
Operation The novel spark arrester 10 may be readily installed on substantially any locomotive (not shown) or the like having a diesel engine. The base member 12 may be secured to a plate member 56 normally provided on the locomotive in the proximity of the exhaust outlet (not shown) in such a manner that the opening 14 will be in direct communication with the exhaust outlet of the engine. Thus, during operation of the engine, the exhaust gases are directed through the opening 14 and into the chambers 22 and 24. The pressure of the escaping gases will act against the grid members 34 and 40, causing them to billow outwardly, as shown in FIGURE 4. Of course,
the pressure variances of the exhaust gases during the normal operation of the engine will cause the grids to articulate or undulate as the exhaust gases are moving therethrough.
The flexing or undulating of the grids 34 and 4f) provide a breaking action for the particles or burning embers contained in the escaping exhaust gases. Only small embers may be discharged through the grids, as established bythe mesh size of the complementary wires 52 and 54, and any relatively large embers will be broken into particles of a sufficiently small sizeV to pass through the mesh material of the grids prior to exhausting thereof from the spark arrester 10. Any of the large particles that are not broken into a sufficiently small size will be knocked down onto the upper surface of the plate 12 and `will eventually work their way back through the opening 14. eliminated, and the danger of setting a fire on the country side is greatly reduced.
When the engine is not in use, o'r is idling, there will be no escaping exhaust gasses, and the portions 47 and 51 of the grids 34 and 4t), respectively, will sag within the chambers 22 and 24, as shown in FIG. 3. However, the flexible characteristics of the belting material from which the grids are constructed provide a freedom of movement for the grids during the operation of the eng-ine for eflciently breaking up any particles contained in the exhaust gasses. It has been found in actual practice that the lubricating qualities of the exhaust, such as the carbon content thereof, provides a lubrication of the grids during operation, and as a result, the wear of the grids is negli- `In addition, the undulating action of the grids provides a self cleaning therefor in that clogging of the belting material is substantially eliminated. Thus, the novel spark arrester efficiently breaks up any particles contained Within the exhaust gasses for reducing hazards from resulting fires, and prevents clogging of the breaker elements or grids in order to preclude interference with v the efficient operation o'f the engine.
From the foregoing it w-ill be apparent that the present invention provides a novel spark arrester particularly designed and constructed for breaking up or reducing the size of any particles or burning embers contained within exhaust gasses from a diesel engine, or the like, in order to reduce the hazard of fires resulting from the discharge of the exhaust gasses. In addition, the grids or `breaker elements of the novel spark arrester fluctuate during operation of the device in a manner to substantially preclude clogging thereof, thus reducing interference of the normal operating efficiency of the engine. The novel spark arrester is simple and efficient in construction and economical and durable in construction.
Changes may be made in the combination and arrangement of parts as heretofore set forth in the specification and shown in the drawings, it being understood that any modification in the precise embodiment of the invention may be made within the scope of the following claims without departing from the spirit of the invention.
What is claimed is:
1. A spark arrester for a diesel engine having an exhaust outlet and comprising a base member adapted to be secured in the proximity of the exhaust outlet of the engine, said base member being provided with an aperture for admitting the exhaust gasses therethrough, a plurality of spaced substantially parallel wall members extending upwardly from the base member for receiving the exhaust gasses therebetween, a plurality of spaced rod members secured between the wall members and extending transversely therebetween, a flexible grid member being dispo-sed between the Wall members for spanning the space therebetween and being loosely disposed between the rod members, said grid member having the opposite ends thereof rigidly secured in the proximity of the base member and the opposite side edges thereof slidably disposed adjacent the inwardly directed faces of the wall' members for independent movement with respect t0 the In this manner, escape of large 'burning embers is -Wall members and rod members, said grid member being responsive to the pressures of the exhaust gasses for undulating during operation of the engine to provide a grinding action for breaking up any particles contained in the exhaust gasses prior to discharge thereof through the grid member and to preclude clogging of the grid.
2. A spark varrester Ias set forth in claim 1 Iwherein the grid member comprises a plurality of substantially parallel members linked ltogether 4by -pivotal hinge-type means to prov-ide independent rotational movement of the para-llel members with respect to each other to provide for the grinding action and free uudulation of the grid member during operation of the engine.
References Cited bythe Examiner UNITED STATES PATENTS Terry 55-293 Yeomans 55-293 Buck.
Sturt et al. 55-374 X Davenport 55-'505 X Smith et al 55-301 Young 55-96 'ROBERT iF. BURNE'IT, Primary Examiner.
HARRY B. THORNTON, Examiner.