USRE357E - Improvement in spark-arresters - Google Patents

Description

`UNITED STATES PATENT OFFICE.

DAVID MATTHEV, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN SPARK-ARRESTERS.

- Specification forming part of Letters Patent No. 1,920,dated December 31,1840; extended December 27,

1854; Reissue No. 357, datedV March 4, 1856.

.T0 all whom it may concern.;

Be it known that I, DAVID MATTHEW, of. the city ot' Philadelphia, Pennsylvania, formerly of the city and county ot' Schenectady' and State of New York, have invented a new and useful machine to be used upon locomotive steam-engines to catch sparks and cinders and cause draft to generate steam and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of the samecreference being had to the annexed drawings, making a part of this specification, in Which- Figure lis a view of the cross-section. Fig. 2 is a top view, Fig. 3 a bottom view, and Fig. 4 a side view, of the said improvement.

The nature of my invention consists in deflecting the steam, gases, and sparks which pass out of the top of the chimney downward in a larger area or space than the chimney,to deposit the sparks, and allow the expanded steam and gases to gently filter or pass through wire-gauze separated from the sparks and inside of an outer casing, which protects them from the condensing and eounteracting influences of the atmosphere; also, in causing the chimney to assist the draft by inducing acurrent to flow through a sectional opening into the chimney between the exhaust-pipes and the extreme upper end of the chimney. The top of this spark-catcher A, Fig. 2, is a plate of iron about thirty-live inches in diameter, and has a cone, G, upon the lower or under side, (see G, Fig. 1,) sixteen inches in diam-` eter, pointing downward, the point opposite the center ot' the plate, and standing at an angle of forty-five degrees from the plate A to the point. Around the edge of plate A is a iiange two and a half inches wide, turned downward, forming a detiecting-head. Below this, and about fourteen inches from plate A,

is another plate, H, connected to plate A by means of eight round iron braces of about three-eighths ofan inch diameter, with feet riveted to the flange of plate A and to plate H. Five of these braces between plates A and H are seen in Fig. 4. This bottom plate, H, is about thirty-one inches in diameter, with a hole in the center sixteen inches in diameter. A funnel-mouth chimney-section, C, Figs. 1 and 4, nine inches long, fourteen inches in diameter at the top, coming up about as high as the lowest point of cone G, is riveted or secured to this plate. The base of this chimneysection is sixteen inches in diameter, is also stayed to the lower section, E, of the chimney,

forming an annularspace betweenits baseand the lower section. There are also ve other holes through plate H,of an oval shape, about gauze is fourteen and a half inches wide, andA presents a surface of about one thousand four hundred superficial inches, through whichthe smoke, steam, and air pass. On the outside of chimney or smoke-pipe E is an outer casing, F, of sheet-iron, rising in the form of a cone, reversed, abouttwenty-five inches above chimney E. The spark-catcher is kept firm by four braces extending from the top plate,

A, (see Fig. 3,) to the outer casing, F, and are bolted to it.' Between the top of the section E of the chimney and the base of the section C there is the annular space of three inches. A pipe of proper length as a support to hold steadily, to which the braces from section C are` attached,A is fitted over the outside of section E like the joint of a stove-pipe.

When the engine is at work, the exhauststeam is discharged up the lower section of the chimney, and passes through the upper section, and with it the smoke, gases, and sparks or cinders are forced against the cone and deilecting-head A, by which their velocity is checked, and they are deected downward. The steam and gasesexpanding and gentlyltering through the wire-gauze, protected by the outer case from condensation and resistance- -of the colder atmosphere, pass out into the open air, and the sparks continue their descent into the lower part of the reservoir formed by the outer case sourrounding the chimney. The funnel-mouth or sectional pipe C being so much larger than pipe E, forming the annular space, when the engine exhausts, the smoke, steam, and airv are displaced out of pipe C with the same velocity that they pass out of pipe E, and causes a current to flow upward through the annular space, and prevents any reaction of the draft from taking place between the pulsations or discharges of the eX- haust; also, when the engine is standing or firing up, this annular space forms a free escapement for the natural draft. The exper- Aments with this improvement show that in working the engine up to its proper power with pine wood about three bushels of sparks and cinders accumulated per hour.

Vhat I claim ise l K 1. The combination of the cone and deflect inghead with the Wire-*gauze inside of the outer` case to deflect the steam, gases, and spark s downward, retain the sparks, and allow the expanded steam and gases gently to escape through the gauze.

2. Forming the chimney of sectionswith the base of the upper section, C, enlarged be yond the diameter of the top ofthe sect-ion E below it, substantially as described.

DAVID MATTHEW?.

Witnesses:

CHARLES D. FREEMAN, Jos. ENGARD.

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