US863685A - Spark-arrester. - Google Patents

Description

No. 863,685. i PATENTED AUG. 20, 1907.

I J. H. WHITE.

SPARK ARRESTER.

PPLIOATION FILED, snPT. 2s. 190e.

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UNITED STATES PATENT OFFIOE.

JOHN H. WHITE, OF RONNEBY,VMINNESOTA, ASSIGNOR OF ONE-HALF TO HENRY M. HUFFMAN, OF FARETINE, MONTANA.

s'PARK-ARRESTER.

Specification of Letters Patent.

Patented Aug. 20, 190'?.

To all whom it may concern:

Be it known that I, JOHN H. WHITE, a citizen of the United States, residing at Ronneby, in the county of Benton and State of Minnesota, have invented certain new and useful Improvements in Spark-Arresters; and I do hereby 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.

My invention has for its object to provide an improved spark arrester especially adapted for use in connection with traction engines and locomotives, and to this end it Consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings wherein like characters indicate like parts throughout the several views. p

Referring to the drawings, Figure l is a View in side elevation showing my improved spark arrester applied to the smoke stack' of a locomotive or traction engine boiler, said boiler being indicated in diagram. Fig. 2 is a view principally in vertical section, with some parts shown in full and some parts broken away, showing the upper portion of the smoke stack, said parts being shown on a larger scale than in Fig. I, and Fig. 3 is a horizontal section taken on the line .t3 x3 of Fig. l.

The numeral l indicates a boiler, and the numeral 2 the smoke stack thereof. The upper end of the stack 2 is provided with an outwardly daring hood 3 having at its upper portion a large opening 4 of approximately the same diameter as the body'of the stack. Within the hood 3 is an annular upwardly flaring sleeve 5, between the upper edge of which and the hood 3 a large clearance space is left. Between the sleeve 5 and the surrounding portion of the hood 3 there is formed an annular cnder receptacle 6, from the lower portion of which, at some convenient point, depends a cinder discharging tube 7 that is suitably secured to the body of the stack.

Located in the discharge passage 4 of the hood 3 is an inverted conical cap 8 of reticulate material, such as woven wire screen, having preferably a rigid metallic band 9 at its upper edge. To the opposite sides of the band 9 are secured the upper ends of depending rods l0, the lower ends of which are pivotally attached to arms 1I of a rock shaft I2, which rock shaft is mounted in suitable bearings I3 secured on the boiler l. The arms ll and the rock shaft 12 constitute a bell crank. The rock shaft l2 has an upwardly extended arm 14 that is connected by a rod l5 to a latch lever 16. This latch lever 16 is pivoted to and coperates with a notched latch segment 17, which in turn is rigidly secured on top of the boiler l, preferably near the rear end thereof, so that the said lever will be within reach of the engineer.

By movements of the lever 16, the reticulate cap 8 may be raised or lowered at will, and may be set in different vertical adjustments. When the said cap is lowered to an extreme position it entirely closes the hood passage 4, except through the perforations of the said hood. When the said cap is thus lowered, cinders and sparks cannot possibly escape from the stack, but the smoke will find an easy escape through the perforations of the said cap. The cinders which strike against the conical cap will be deflected laterally into the annular cnder receptacle (i, and from thence will work their way outward and downward through the tube 7. Of course, if desired, a suitable receptacle may be provided at the lower end of the tube 7 for catching the cinders, or the lower end of the said tube may be normally closed by means of a removable plug or stopper. The reticulate plate or perfor-ate cap 8 should always be lowered when the lire is being started, or at other times when it is extremely important that no cinders or sparks be allowed to escape from the stack through the top thereof. At other times when there is no great tendency to eject sparks or cinders, or when the escape thereof will not do damage, andan extremely strong draft is required, the said cap 8 may be raised, as shown in Fig. 2.

The device described, while of small cost, may be easily applied to smoke stacks, and is efficient for the purposes had in view.

What I claim is:

In combination with a smoke stack 2 provided at its upper end with a hood 3, formed with an upwardly curved outwardly flaring lower portion, and at its top with a circular discharge passage of the same diameter as the stack 2, the upwardly curved outwardly flaring inner collar portion 5 secured within the said hood and coperating with the outwardly flaring lower portion of said hood to form an annular upwardly flaring cnder receptacle 6, a discharge tube 7 leading downward from said annular receptacle G, an inverted conical reticulate cap 8 mounted for vertical movements within said discharge passage 4 and means for raising and lowering the same, substantially as described.

In testimony whereof I afhx my signature in presence of two witnesses.

JOHN H. WHITE.

Witnesses:

W. F. EWERT, R. DAYTON.

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