US429138A - Spark-arrester - Google Patents

Description

(No Model.)

L. O. MABIE.

SPARK ARRBSTER.

Patented June 8, 1 890.

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UNITED STATES PATENT OFFICE.

LANGFORD C. MABIE, OF RICHMOND, VIRGINIA.

SPARK-AR RESTER.

SPECIFICATION forming part'of Letters Patent No. 429,138, dated June 3, 1890.

Application filed February 18, 1890- Serial No. 340,846. (No model.)

To all whom it may concern:

Be it known that I, LANGFORD C. MABIE, of Richmond,in the county of Henrico and State of Virginia, 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 same, reference being had to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention has for its object to provide a spark-arrester which will effectually arrest and prevent the passage of any sparks or other solid mattersuch as cinders from a locomotive smoke-stack, and at the same time to leave a perfectly free and open passage for the air, steam, and other gaseous products, thereby enabling the maximum draft to be obtained.

To these ends the invention'consists in certain novel details of construction and combinations and arrangements of parts, to be here inafter described, and pointed out particularly in the claims at the end of this specification.

Referring to the accompanying drawings, Figure 1 is a sectional View through the front end of a boiler and smoke-stack constructed in accordance with my invention. Fig. 2 is a front elevation showing the cinder-box with the stack partially broken away to show the cinder-conduit. Fig. 3 is a top view of the stack with the deflector or upper diaphragm removed. Fig. 4 is an enlarged section of the top of the stack.

Similar letters of reference in all the figures denote the same parts.

A, Figs. 1 and 2, is the boiler, which may be of any preferred type, either with or without an extension-front, and on top of the same is secured by bolts or otherwise a cast iron smokestack B, preferably tapering from top to bottom, as shown. Within the stack B is a second or inner stack 0, of somewhat smaller diameter, held in place by spacing-bolts 0,10- cated at the top and bottom, or elsewhere, if necessary, with a space of three or four inches between the two shells or stacks. The top of the inner stack 0 is closed by a concavo-convex top or diaphragm D, having a series of apertures therein, in which are located short tubular sections D, preferably about three and one-half inches in diameter,and which extend about four inches above the surface of top D, the whole top and tubular extensions being preferably cast in one integral piece. The outer stack is provided with a cover or concavo-convex diaphragm B, preferably held on a seat I) about eight inches from the top D, and is provided with apertures and tubular projections about four inches in diameter and length, which extensions project downward, and it will be seen, therefore, that the ends of the two sets of extensions are in substantially the same plane. The extensions of the lower diaphragm are so located with reference to those in the upper diaphragm as to break joints, so to speak, or so that any sparks, cinders, or other solid matter passing through them will not enter the upper extensions, but will strike the under surface of the diaphragm and drop back on top of the lower diaphragm, sliding thence down over the convex surface into the space between the two stacks.

In order, now, to provide a means for removing the solid matter so caught, the space between the two stacks is converted into a passage-way by means of partitions E, starting from a point in rear of the stack at the top and extending diagonally around and ending in a pipe E at the bottom, which leads to a suitable receptacle or box F, preferably located below the boiler and provided with a hopper-bottom with a door F opening outward at the bottom of the hopper portion, whereby the entire box may be emptied by opening the door. The door is operated from the cab by means of a rod and bell-crank lever F bearing against the door, as shown.

The operation of this portion of the invention will now be readilyunderstood, the products of combustion, sparks, cinders, 850., drawn through the stack by means of the exhaust, as usual, are all carried up the inner stack and readily find the apertures in the lower diaphragm by reason of its curved surface, and on passing through them the solid particles are projected straight-forward until they strike the under surface of the upper diaphragm and drop back onto the convex top of the lower diaphragm, sliding thence down into the chute, and thence into the receptacle, the gaseous products meanwhile passing readily from one set of tubular extensions to the other and into the open air. The space into which the solid particles fall, it will be observed, is comparatively undisturbed by the escaping gases, and hence there is little or no liability of the sparks being carried out the top of the stack.

A pipe G communicates with the receptacle F and with the boiler or tank, whereby the engineer may easily extinguish any sparks and dampen the collected cinders, as will be readily understood. The inner stack, it will be observed, is tapered from the top to the bottom or flared upward, thus assisting the draft, as the exhaust expanding in the same will tend to move upward. 7

Having thus described my invention, whatI claim as new is- 1. In a spark-arrester, the combination,with the flue or stack for the products of combustion from the furnace, of two diaphragms interposed in said fine and having apertures therein, with tubular extensions in each diaphragm, said extensions projecting toward each other or each into the space between the diaphragins, substantially as described.

2. In aspark-arrester, the combination,with the line or stack for the products of coinbustion from the furnace, of two concave-convex diaphragms interposed in said fine and having apertures with tubular extensions in each diaphragm, said extensions projecting toward each other or into the space between the diaphragms, substantially as described.

In a spark-arrester, the combinatiomwith the fine or stack for the products of co1nbnstion from the furnace, of a concavo-convex diaphragm interposed in said line and having apertures therein, with upwardly-projecting tubular extensions therein, and a second diaphragm interposed in said flue above the first diaphragm and having apertures therein of greater diameter than those in the lower diaphragm, with tubular extensions projecting downward, substantially as described.

4. In a spark-arrester, the combin ation,with the boiler, smoke-box, and stack, of the two concavo-eonvex diaphragms in the top of the stack, each having apertures therein, with tubular extensions projecting into the space between the diaphragnis and the conduit leading from the lower portion of the bottom diaphragm to a receptacle for the cinders, substantially as described.

5. The con1bination,with the smoke-box and stack secured thereon, having a diaphragm therein, with perforations therein, having downwardly-projeeting tubular projections, of an inner stack having a diaphragm at the upper end with perforations and upward tubular extensions, and a diagonal partition between the two stacks, whereby a flue is formed for conveying the cinders and ashes out of the space between the diaphragms, substantially as described.

LANGFORD C. MARIE.

\Vitnesses:

Z. I BURNETT, L. B. SOHERER.

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