US1364792A - Spark-arrester - Google Patents

Description

W. B. NUTTING.

SPARK ARRESTER.

APPLICATION man JAN. 8. 1920.

Patented Jan. 4,1921.

luwwl ow 1/ Vw MOI/"M10 WILLIAM BUGKRIDGE NUTTING, OF PORTLAND, OREGON.

SPARK-ARRESTER.

Specification of Letters Patent.

Patented Jan. 4, 1921.

Application filed January 8, 1920. Serial No. 350,104.

To all whom it may concern:

Beit known that I, WILLIAM B. NUTTING, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Spark-Arresters; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in spark arresters, and it has for its primary object to provide a device which may be easily attached to the smoke-stack of a furnace or the like, which will prevent the sparks and hot cinders from escaping from the smoke-stack, thus preventing fires which might otherwise occur due to sparks flying from the smoke-stack.

Another object of the invention is to provide a device of the above-mentioned character which is simple in construction, as well as eiiicient and reliable in operation, one which is strong, durable, inexpensive to manufacture, and which is of such construction and arrangement of parts that it may be easily secured to a conventional type of smoke-stack and will not necessitate any structural changes whatsoever of the latter.

Other objects and advantages of the invention may become apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure 1 represents a vertical section of a device constructed in accordance with my invention.

Fig. 2 is a top plan view thereof.

Fig. 3 is a transverse section on the plane of the line 33 of Fig. 1.

Fig. 4 is an enlarged detail perspective view of the baiiie-plate.

In the drawings, wherein for the purpose of illustration, is shown a preferred embodiment of my invention, the numeral 1 designates a cylindrical pipe which is adapted to be connected to the smoke-stack of a furnace or the like. Rising from the upper end of the smoke-stack is an enlarged inverted frusto-conical member 2. As is usual, this member 2 is provided at its upper end with a flange 3 by means of which a hood may be bolted or otherwise secured if desired.

Disposed within the member 2 are upper and lower spaced cones 4 and 5 against which the sparks and hot cinders strike and are broken up into tiny harmless particles, after which some of them pass out with the smoke while others are deflected laterally and downward against the inner walls of the member 2 and are returned to the smokestack and directed back to the furnace. The cones are of different sizes and the lower cone 5 is truncated so as to permit free passage of the sparks and cinders therethrough. The diameter of the base of the lower cone 5 is approximately the same as that of the pipe; and the diameter of the base of the upper cone 4 is of a greater diameter than that of the pipe 1, so as to insure that the sparks will be effectively caught beneath these cones and broken up. These cones may be supported and positioned directly in a line with the pipe 1 by any suitable means. However, I employ a plurality of angle irons 6 which are secured at one of their ends to the member 2, and at their opposite ends to the cones 4 and 5. Ordinarily the sparks passing upwardly against the upper cone 4 are caught in the apex thereof which forms a pocket, andin this way this cone becomes intensely heated and does not last long. In order to prevent these circumstances, I provide a substantially circular baffle-plate 7 which is carried by the cone 4, being disposed horizontally beneath the apex of said cone in such a manner that the sparks and hot cinders, instead of coming into direct contact with the apex of the cone, come in contact with the baffle-plate 7, thus saving the cone and causing it to last a great deal longer than it would otherwise. As before stated, this baflie-plate 7 is substantially circular in configuration and the diameter thereof is equal to approximately the diameter of the upper open end of the lower cone 5. This halide-plate may be secured to the cone 4 in any suitable manner, but I prefer, for the sake of cheapness, to provide it with apertured legs or ears 8 by means of which it may be securely heldin position on the cone 4:. The legs 8 will preferably be made integral with the body of the plate as shown. Particular emphasis is laid on the fact that by employing the bafiie-plate and positioning it in the manner above set forth, the sparks issuing from the pipe will be prevented from coming into direct contact with the apex of the upper cone l and the life of this cone will be greatly increased.

In operation, the smoke containing the sparks and hot cinders is forced upwardly through the pipe 1 by a draft in the usual manner, and after passing out of the open end of the pipe it will pass through the truncated cone 5 and into contact With the battle-plate 7 and lower portion of the cone The sparks and cinders Will come into contact with these parts with considerable force and will be broken into small harmless particles, after which some of these particles Will be carried out into the atmosphere by the smoke, While others will be deflected, by means of braille-plate 7, laterally and downward against the inner surface of the member 2, and will roll by gravity downard through the pipe 1 back to the furnace.

From the foregoing description taken in connection with the accompanying drawings, the operation of the device is thought to be clearly understood.

A device contracted in accordance with ey invention wi l be found to be exceedingly simple in construction, very easy to apply to a smoke stack, and it will be found eifective in operation, and the particular construction and arrangement of parts is' such that the long life of the device is assured, and the parts may be easily and readily replaced and repaired.

lVhile I have shown and described my spark arrester as being used in connection with metal smoke-stacks, I desire it to be understood that it may also be applied to brick chimneys or any other types of pipes or smoke-stacks.

I claim:

A spark arrester comprising a cylindrical pipe, an enlarged inverted frusto-conical member rising from the upper end of said pipe, being open at its upper end, a truncated cone-shaped deflector supported in the mem her at a. point intermediate the upper end of the member and the point of connection of the latter with the pipe, the base of said deflector being of a diameter equal to that of the pipe, a second conical deflector arranged in the member near the upper end of the latter, its apex extending above said upper end, its base being of a greater diam eter than the pipe, and a baffle plate disposed horizontally beneath the apex of the upper cone, the diameter of said balile-plate being approximately equal to the diameter of the upper open end of the truncated cone.

In testimony whereof I have hereunto set my hand.

WILLIAM BUCKRIDGE NUTTKNG.

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