US1854160A - Incinerator spark arrester - Google Patents

Description

April 12, 1932. A. E. BAIRD 1,854,160

INCINERATOR SPARK ARRESTER Filed July 26, 1930 Patented Apr. 12, 1932 ALBERT E. BAIIRID, or Los AnGELEs, CALIFORNIA i'NcINERAToR SPARK ABRESTER Application filed m 26,

' Thisinvention relates to improvements in spark arrcsters for use on incinerators and s1m1lar burners.

V One of the objects of the present invention 5 is to provide a simple, efficient and inex-' pensive incinerator spark arrester construct ed of a minimum number of parts.

A further object thereof is to provide an incinerator sparkarrester so designed, ar-

ranged and constructed that it will reduce the tendency of sparks escaping thru the spark arrester and thus eliminate a grave fire hazard;

' Another obj ec't'of this invention is to pro- 1 vide, in conjunction with anincinerator a spark-arresting unit which permits products of combustion to escape from the combustion chamber of the incinerator but is eflective to prevent sparks from escaping into the atmosphere; i

A stillfurther object of this invention is to providea spark arrester for use in burners, furnaces, and incinerators that is composed of a series of circumferential sections of simi- "lar shape and constructiontofacilitate assembling the sections when the spark arrester is about to be connected at the upper end of an incinerator. i

A further object of this invention is to provide a spark arrester for incinerators and the like which shall be light, strong, durable and convenient to install or to remove from an incinerator.

In carrying out the present invention a spark arrester is constructed from interchangeable sections, each section having a rib forstrengthening purposes, and being formed with, preferably rectangular air openings sufiiciently' small, numerous and closely conti uous to prevent the possibility of large spar s escaping therefrom or there- Qthru from inside the, combustionchamber of the device that might otherwise create a fire hazard; 1

A further purpose of this invention is to provide novel looking or securing means for the several sections of the spark arrester that are to be secured orjoined together;

With the above and. other objects in view my invention consists in the combination, ar-

193'0. Serial No. 470,541.

rangementand details of constructiondisclosed in the drawings and specification, and then more particularlypointed out in the appended claims, a

In the drawings, wherein similar referonce characters designate similar parts thruout the respective views,-

.Figure 1 is a frontelevation of myrinvention, f I

Figure 2 is a fragmental sectional eleva tion showing two connected sections frominside the incinerator, v

Fgure 3 is a top plan view of the invention,

I Figure 4 :is a'fragmental sectional elevation of one section showing' the device as'it appears edgewise,

Figure 5' is a fragmental sectional elevation of" another edge of the section, shown inFiguret, f i I 1 c Figure 6 is a fragmental detail View of the circumferential wall of the spark arrester showing the formation of the openings,

Figure 7 is a fragmental detail sectional view taken thru line 7 7 of Figures 1 and s,

Figure 8 is a fragmental detail sectional vieiw taken thru line 88 of Figures 1 and 5, an

Figure 9 is a fragmental sectional elevation of an arrester showing it mounted upon part of an incinerator. a

In the drawings, which are merely illustrative of my invention, 10, broadly desig nates the incinerator spark arrester forming my invention. The device is of tubular design and construction, altho it may have any other shape, it being a hollow body made preferably of a series of circumferentially arranged spark arrester sections, such as the arcuate sections 11, 12,;and 13, three in number. Any number of sections could be provided. .Each arcuate section is a separate castingformed upon the end of one end edge, say its upper end, with an integral forwardly projecting locking lug 14, being concavo-convex of which its concave surface is designated 15, as in Figure 8, and is designed to engage around, so as to overlap the coinciding edge of the mating section. This lug 1 1 is offsetwith respect to the plane of the edge of'the Y arrester section upon which it is formed as 10" shown in Figure 3, so that when the meeting edge of the mating arrester section makes a butt joint or connection with this lug 14, the two united sections will be truly concen trio in manner of assembly. v

Any of the arrester sections, has, in addition to the lug 14 formed upon one edge, another lug formed at an opposite end of its opposite side. Thus the concavo-convex lug 16 is formed as an integral projection upon the lower portion of the imperforate mar ginal strip N of each section, and projects beyond the mentioned edge of the section so as to overlap the meeting edge of the mating arrester section, when the two sections are assembled as shown in Figure 3. This lug 16 is larger than the lug 1a and its projecting portion is offset so as to be able to engage the inner face of the mating section. The concave surface of this lug 16 is designated in Figure 8 at 15, and into it projects, externally of the spark arrester, as shown in Figure 1 an integral boss 20A formed upon its imperforate marginal strip M of the particular section and thus the projection of the boss 20A into the concavity of the lug 16 causes this lug to register properly with the hole 28 (Figure 5) formed in the boss 20A so now a screw bolt 19 may be caused to project thru the hole 17 formed in the pr0- jecting end of the lug 16 into hole 28 of the boss, and a nut 20 screwed home to tightly draw the two sections in clamped relation. By registering lug 16 and boss 20A and clamping these surfaces together the lug 1 is properly positioned so as to make a butt overlapping contact with its mating section. Hence with the sections properly interconnected it will clearly be seen that the lug 16 of one of the meeting edges of one section overlaps the other section, and the lug 14 of the second section overlaps the first section, both lugs being seen from the inner surface of the completed spark arrester. The interlocking arrangement already described is repeated wherever two sections are to be clamped together edgewise.

Itwill be noted that each arrester section is formed perforate so as to have a honeycombed shape in that it is formed thruout its main arc with small ports or holes or openings broadly designated 22. These ports are large enough to admit air but too small to permit large sparks generated in the combustion chamber of the incinerator to jump out therethru and escape into the atmosphere and possibly start a fire when brought into contact with any surface. Each section is formed upon its lower arcuate rim with a spaced apart series of slots 17, to lighten the arrester unit.

In Figure 9 it will be seen that the spark arrester will embrace the upper end of the pipe B of the incinerator, itsv annular bead 25 coming to rest upon the upper edgeofthis pipe which thus supports the spark arrester in proper position- The rib 25 also reinforces the arrester where it is naturally weak. The arrester could just as effectively be made in one piece, if desired.

From Figure 6 it will also be seen that the rectangular openings 22 may be formed by me ans of V-shaped ribs the thin edge of which is designated 23, the inclining sides being designated 26, while the thickened portions at the intersections of these ribs are designated 24. This will result in considerably strengthening such rectangular openings and strength is necessary in order to obtain the very best results.

From the foregoing, it will be seen that the incinerator spark arrester is made in a simple manner. It will be understood that the cap piece A will be applied, in a plastic condition, directly upon the upstanding arms 21 of the upper edge of the incinerator so that these arms will properly anchor the upper portion of this device. I do not limit myself to the exact details of construction of this device but mean to cover all variations falling within the purview of the appended claims. The cap piece A is a cover which closes the top of the spark arrester.

lVhat I desire to claim and secure by Letters Patent is l. Inv an incinerator, a spark arresting hollow unit connected to the upper end thereof and composed of a series of arcuate sections of reticulated formation, and means for interconnecting all sections of said hollow unit together rigidly.

2. In an incinerator having an upperneck, a hollow spark-arresting unit'composed of rigidly interconnected arcuate sections each section being of honey-comb construction, said sections being seated upon said incinerator neck and being formed with integral upstanding anchoring means and ahead rigidly connected by said anchoring means to said spark-arresting unit.

3. In an incinerator having an upper neck, a hollow spark-arresting unit composed ofa series of circumferentially arranged metal sections, means for rigidly interlocking the sections of the spark-arrestingunit, each section being of honey-comb formation providing a series of ports, a cap surmounting said unit and integral projections formed upon the upper edges of said sections being anchored into the said cap 4:. Asa new article of manufacture, a spark-arresting unit comprising a tubular body composed of a circumferentially spaced apart series of vertical perforated sections, said sections having a butt jointed connection with one another, marginally, integral anchoring projections carried by said sections at either end, and means for clamping said projections together,

5. As a new article of manufacture a spark-arresting attachment for incinerators composed of a circular series of vertical perforated sections the coinciding edges of the several sections having an overlapping bearing and means for releasably clamping said sections together in interlocked relation.

6. As a new article of manufacture a sparkarresting device for incinerators consisting of a series of interchangeable arcuate sections designed when in interconnected to make a tubular structure, each section being perforated, a circular series of contacting lugs formed conjointly upon adjacent edges of the arcuate sections, fasteners passing thru each set of contacting lugs to rigidly secure them together, and another circular series of contacting lugs formed upon the adjacent edges of the arcuate sections which are pressed together with an abutting action as said fas teners are driven home.

7. In a device as described a spark arrester composed of a cylindrical unit having at its lower end an annular series of slots, and beingaperforated thereabove, and an annular internal rib encircling the inner circumference of the unit immediately above said slots to reinforce the slotted portion and to constitute a seat to support said spark arrester upon an incinerator.

8. In an incinerator, a tubular member having an internal annular rib seated upon the upper edge of the incinerator and having its lower annular portion encircling the outer face of the incinerator, a series of circumferentially disposed posts extending from the upper edge of the tubular member, and an imperforate cap seated upon the posts, so the posts are imbedded in said cap.

9. As a new article of manufacture a spark arresting chimney comprising two-semi-circular perforated sections whose edges contact, a series of lugs formed upon one sec-i tion upon its inner face engaging the opposite section to make a lap joint therewith, the con i tacting faces of the lugs and overlapped section being respectively convex and concave. In witness whereof he has hereunder set his hand this day of July 8th, 1930.

' ALBERT E. BAIRD.

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