US459179A - Half to frank dekum - Google Patents

Description

P. M. LOW.

SPARK ARRESTBR.

Patented Sept. 8, 1891.

(No Model.)

UNITED STA-TES PATENT OFFICE.

PHILIP MARTIN LOW', OF EAST PORTLAND, OREGON, ASSIGNOR OF ONE HALF TO FRANK DEKUM, TRUSTEE, AND GEORGE II. DURHAM, OF

SAME PLACE.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 459,179, dated September 8, 1891.

Application iled February 18, 1891. Serial No. 381,940. (No model.)

T all whom, t may concern:

Be it known that I, PHILIP MARTIN Low, a citizen of the United States, residing at East Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Smoke-Stacks and Spark-Arresters, of which the following is a specification.

My invention relates to improvements in spark-arresters; and it consists in the novel construction and arrangement of parts of which the following is a specification.

In theaccompanyingdrawings,in which like reference-signs refer to like parts throughout the several views, Figure 1 is a cent-ral sectional view of a smoke-stack attached to a boiler. Fig. 2 is a side view at right angles to Fig. 1, the parts being broken away to show the interior of the stack. Fig. 3 is a plan view of the stack, the screen and detlector being removed; and Fig. e is a plan view.

In the drawings, A represents a boiler of the type usually found in locomotives; but

' my invention may be used with any other class of boilers or furnaces.

B is a smoke-stack, which may be of any section, but is here shown as circular.

Surrounding the upper portion of the stack is a conical casing C, which extends from a plane at about the elevation of the top of the stack downward a considerable distance and inclines toward the stack, so as to iit closely thereto at its lower end.

Upon the upper edge of the casing is supported a spider-frame S, composed of inclined bars 1 and an upper horizontal portion 2. Upon the bars l is iiXed a suitable netting 3 to prevent the direct escape of sparks which may be thrown out sidewise from the de- Hector. As an additional means of preventing the escape of sparks I in some instances provide a cylindrical netting 15, in the form of a skirt attached at its upper edge to the deiector and at its lower edge to a metal ring 16, as shown in Fig. 2, said ring being below the top of the stack.

A conical detlector D, having a central cone a and a circular web 5 of somewhat greater diameter than the stack, is located centrally and at a short distance above the top of the ing.

stack. This deiiector is provided with a shank G, which is screw-threaded, and it is adjustably supported upon the spiderframe by means of the nuts 7, as shown in Figs. l and 2. The function of this deector is to throw the sparks downward into the conical casing and it is made adjustable, so that it may be accommodated to different amounts of draft from the stack and different kinds of fuel. As an additional support for the delector, screw-threaded rods 2O may be used to connect it with the stack, as shown in Figs. 1 and 2.

At the bottom of the casing is provided openings O for the discharge of the cinders, and from these openings pipes P convey the cinders to the ground or to any suitable receptacle. There there isa forced draft, as is common in locomotives, the pressure within the casing will tend to carry the cinders through the opening and pipes; but in order to insure the discharge of the cinders and also to put out any which may be still burning I introduce a jet of steam at the openings O, thus forming ejectors. This steam is supplied through pipes 8 from the boiler.

Between the stack and the casing plates M are arranged so as to guide the cinders toward the openings in the bottom of the cas- These plates are preferably four in number, and they extend upward spirally around the stack, one either side of each opening O, the upper edges of the plates meeting at i) and forming wedges which do not interfere with the downward course of the sparks. These plates, together with the casing and the sides of the stack, form tunnels which collect the sparks at the openings O, through which they are discharged. I will hereinafter d csignate the plates M as collecting-plates.

To prevent counter-currents from carrying any of the sparks upward and to preclude the possibility of their escape, I sometimes introduce bathe-plates l0 11 within the casing and upon the stack. few inches in width and inclined downward, as shown.

In operation the hot gases, smoke, and cinders which are ejected from the stack are deiiected downward into the casing by the cone These plates are a IOC defiector D. The sparks by their superior weight and momentum are carried down into the funnels formed Within the casing, While the smoke and gases escape through the netting or through the open top above the delector. The steam-ejectors keep the openings in the bottoms of the funnels always clear, the sparks being rapidly discharged through the pipes P and et the seme time quenched.

Without limiting myself to the precise construction and arrangement shown, I claim- The spark-arrester consisting, in combination with the stack, of the conical casing surrounding the upper end of the stack and havnaine to this specification in the presence of z 5 two subscribing Witnesses. PHILIP MARTIN LOW.

Witnesses: v

RoBERT G. MoRRoW, HARRISON G. PLATT.

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