US965757A - Spark-arrester. - Google Patents

Description

11. SCHMIDT SPARK ARRESTER. APPLIOATIO! FILED JULY 3,1907.

Patented July 26, 1910.

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THE mmms PEfERS ca. wusnmcrou n c HANS SCHMIDT, OFIBERLIN, GERMANY.

SPARK-Annmarie.

Specification of Letters Patent. Patented July 26, 1910.

Application filed July 3, 1907. Serial No. 381,978.

To all whom it may concern:

Be it known that I, HANS SCHMI a subject of the Emperor of Germany, residing in Berlin, Germany, have invented certain new and useful Improvements in Spark-Arresters, of which the following is a specification.

My invention relates to that class of spark arresters in which inverted cones of reticulated material are arranged in a smoke stack in the path of the products of combustion from a steam boiler or other furnace, and the object of my invention is to so improve spark arr-esters of this class that the gases may be allowed to freely pass through the smoke stack while the cinders and other solid particles of the products of combustion are arrested and returned to the chimney without clogging the sieves.

In carrying out my invention I preferably employ two cone-shaped sieves arranged one within the other and both arranged in a smoke stack or chimney "with their apexes pointing downward. The inner sieve is preferably made of one continuous piece of wire cloth or other suitable reticulated material, while the outer sieve is divided to provide a free passage for air out through the chimney and the return of solid particles of combustion to the chimney, thus preventing the clogging of the sieve.

My improvements are clearly illustrated in the accompanying drawings in which,

Figure 1 shows a vertical section of a smoke stack with the conical screens indicated by dotted lines. Fig. 2 is a perspective view of the screens. Fig. 3 shows a horizontal section on the line 33 of Fig. 1.

I have shown my invention embodied in a spark arrester wherein two conical sieves are employed. A dilferent number might be used.

The inner sieve a is preferably made continuous, the tapered periphery consisting entirely or mainly of reticulated material, such as wire cloth as is usual. The upper portion of this conical sieve may be secured to the upper part of the smoke stack or chimney b in any suitable way. As coneshaped sieves of this kind are quite common in spark arresters, no further description of this part of the invention is necessary.

The outer sieve is of novel construction and accomplishes new results. As shown in the drawings, it is divided into two parts 0 and 03, each constituting a half cone, as

clearly indicated by dotted lines in Fig. 1. Each cone section is made of reticulated material, such as wire cloth of preferably larger mesh than that of the cone a and one of these sections is preferably raised above the other as indicated and its vertical edges are made to overlap. the vertical edges on the other section. The parts of the divided cones near these vertical edges are so held that they are out of contact with each other and leave spaces or vertical slots which insure the passage of gases and the return of solid particles of combustioin As clearly shown in Fig. 1 the outer cone is ar ranged around the lower portion of the inner cone and extends beyond the apex thereof. If the outer cone is made continuous, there is danger of its lower portion be coming banked up with cinders which would impede the passage of smoke and combustion gases, and it often happens in this class of spark arresters that the meshes of the cones become rusted or clogged so that a sufficient draft cannot be obtained.

By my iml )rovements the smoke and other gaseous pro nets of combustion are made to pass freely through the sieves in the normal operation of the apparatus, the larger cinders being arrested by the outer cone, as, owing to the overlapping of the cone sections, the cinders will strike the reticulated parts of the cone and will thus be impeded. The smaller cinders which may pass through the meshes are arrested by the inner cone and fall into the outer cone whence they are delivered through the vertical slots or openings between the cone sections. If, however, the meshes of the outer cone become rusted, clogged, or otherwise filled so as to impede the passage of the combustion gases, said gases will find a ready passage through the openings between the cone sections above referred to.

I claim as my invention i 1. A spark-arrester, comprising an inverted cone of reticulated material and another cone of reticulated material arranged around the lower portion of the first mentioned cone and which is divided vertically, has overlapping vertical edges at the divided portion to form an unrestricted opening extending from top to bottom of said outer cone for the passage inwardly and upwardly of gases and the delivery downward of solid particles, and which outer cone extends below the apex of the inner cone.

2. A spark arrester, comprising an inverted cone of reticulated material and an outer cone of reticulated material surrounding the inner or upper cone and formed in sections, the vertical edges of which overlap without touching and thus provide openings for the passage inwardly and upwardly of gases and the delivery downward of solid particles. V

3. The combination of a smoke stack, an

' inverted inner or upper cone of reticulated material arranged at the upper part thereof, and another cone of reticulated material arranged around the lower portion of that first mentioned which is divided and has overlapping portions at the sides which are out of contact with each other and thus provide a vertical opening for the purpose specified,

4:. The combination of a smoke stack, a

In witness whereof I have hereunto set my hand in presence of two witnesses.

HANS SCHMIDT. Witnesses:

WOLDEMAR I-IAUr'r, HENRY HASPER.

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