US6600A - Samuel swett - Google Patents

Description

UNITED STATES rPATENT QFFCE.

SAMUEL SWETT, OF NEWv YORK, N. Y.

DEFLECTOR FOR SPARK-.AR-RESTERS.

Specication of Letters Patent No. 6,600, dated July 24, 1849.

--To all whom t may concern Be it known that I, SAMUEL Swnfr'r, of the city, county, and State of New York, have invented a new and useful Improvement in Sparkflrresters, for Locomotive and other Steam Engines, which is described as follows, reference being had to the annexed drawings of the saine making part of this speciiication.

Figure l, is a vertical section of the spark arrester drawn through the center. Fig. 2, is a side elevation of the hollow button, cap, and section of the dome. Fig. 3, is a top and bottom view of the plate suspended above the hollow but-toii. Fig. t, is a top and bottom view of the button. Fig. 5, is an elevation of the dome.

, Similar letters in the diiierent figures refer to like parts.

The spark arrester is in its general form and arrangement made like those in use on some of our northern railways.

The principal improvement that have made and desire to secure by Letters Patent is placing' a hollow trumpet shaped button and curved or inverted conical cap directly over the center of the smoke pipe and under the central opening in the dome, forming4 a steam way, for the purpose of receiving a portion of the escape steam and causing it to issue in a circular stream at the periphery of the largest end of the said trumpet shaped hollow button by a curved cap plateV placed over the large end of the trumpet shaped button, the steam -being made to issue downward in a circular sheet and to pass obliquely through the column of smoke and sparks as it passes over the edges of the trumpet shaped button and cap-the steam striking' the sparks and driving them against the concave surface of the dome and extinguishing the sparks and turning them downward into t-he space between the smoke pipe and surrounding jacket, while a portion of the smoke will pass with the draft through the eye of the dome, and a portion will pass through the meshes of the wire gauze.

The arrows numbered l, 2, 3, 4, 5, 6, show the direction of the smoke. Those numbered 7, 8, 9, 10 show the direction of the sparks. Those numbered 11 and l2 13, 14 and l5, show the direction of a portion of the steam.

The smoke pipe A, the cap B composed 0f the metallic dome B having a circular Curb B5 around the eye thereof wire gauze B2, and circular ring, or collar B3, and curved connecting rods Bt, the jacket C forming the receptacle for the sparks and shield to the cap, are made in the usual manner. The escape steam is introduced to the smoke pipe A by`a pipe A or pipes leading from the steam chest in the usual manner. The sparks and cinders, when extinguished, are removed through a door or opening o at the bottom of the jacket, in the usual manner.

The trumpet shape-d hollow button D is made of thin niet-al and is suspended to the dome in the manner represented in the drawings, or in any convenient way, by hanging posts I, or otherwise.

end of the said trumpet shaped button is likewise suspended by said hanging posts in a position to leave suiiicient space between it and the trumpet shaped butto-n for the steam to issue downward against the sparks and also between the upper surface and the concave surface of the dome for the smoke to pass out in the direction of arrows 3, L Fig. l. The pendent hollow trumpet shaped button D is stationary and its under or concave surface forms a continuation of the kcurve line of the dome nearly to the level of the lower and smaller end of the button forming a semi-circle. The opening (d) between the central pendent button and dome is for the smoke to pass out when the engine is at rest, when running the engine the escape steam passes into the smoke pipe and hollow trumpet shaped button a portion of the smoke and steam will pass through the netting or wire gauze B2 and the sparks will descend to the interior of the jacket. The aperture in the center of the pendent button must be of the requisite capacity to admit sufficient steam to extinguish and drive back the sparks that may be inclined to pass through the eye of the dome. The hollow button being filled with steam it strikes against the pendent top piece D and spreads around the larger diameter of the button in a circle and saturates, veXtinguishes, and keeps back the sparks.

The ent-rance for the steam to the button is generally about 1% inch diameter` and is arranged exactly over the exhaust pipes. The issue for the steam at the periphery of the button is generally about one quarter The curved cap plate D that covers the large or open,

of an inch wide. When the engine is at rest the smo-ke will mostly pass through the opening between the central pendant button and the curb of the dome and thus preventsthe interstices of the wire gauze becoming clogged with soot. In tiring up and stopping and coming down an inclined plane no steam will be required to promote draft as the pendant button which serves as a stationary valve will be always belo-w the eye of the dome allowing a free draft without t-he use of steam. Therefore, the steam will go on increasing in the generator at these periods, which will cause the engine to increase in power and give it' an advantage over those that have the ordinary smoke pipes attached to them which requires a waste of steameto keep up the draft at those periods.

This arrester has no valve to open o-r close, the eye of the dome being always open. This is a very important item of improvement. No fire will escape, all must be turned downward. The lower edge or base of the dome at turns inward toward the smo-ke pipe to throw the sparks from the net-ting and save it from destruction by Afriction and heat of the burning cinders and to fall below the horizontal collar. The netting is also made to set off from the dome by the connecting rods B4 that connect the dome B1 to the collar B3 said rods being bent outwardly in order to push the wire gauze outwardly and thus prevent it from being struck by the' sparks while being driven downwardly by the steam.

The wire netting or gauze B2 is secured over the connecting rods B4 by circular clasp rings, P, and Q, made to embrace the lower portion of the dome B1 and circular curb B3, and are provided with clamp screws S, by which the said clasp rings are drawn tight around t-he base of the dome and circular curb, by which the wire netting or gauze is made to fit properly over the rods B4.

The dome B, cap D, gauze B2, and curb B3, forming the bonnet, are fastened and braced to the inside of the pipe or jacket C,

by upright rods G, extending from the bottom plate C2, of the cinder box to which they are attached, up through short brace bars H, and secured thereto by nuts N, resting upon them. The outer ends of these short bars H, rest and are secured in boxes L,

Vbolted to the inside of the acket, and extend tween the upper part of the jacket and thebonnet, secured to the inside of the jacket V and upon which the bonnet. rest-s, the circular curb B3 of the bonnet passing through the circular space in the floor R.

What I claim as my invention and desire to secure by Letters Patent, is-

The combination of the stationary hollow trumpet shaped pendant button D, and stationary curved cap D, with the dome B', constructed, arranged and operating in the manner and for the purpose set forth, by which I am enabled to prevent the escape of the sparks with the smoke, the effect of the steam from the exhaust pipes entering the hollow button being three fold, first, to force the sparks downward by coming in contact with them at the circular passage (d), secondly, to extinguish them, and thirdly to increase their specific gravity and thus cause them to fall immediately to the bottom of the cinder box C3.

In testimony whereof I have hereunto signed my name before two subscribing witnesses.

SAMUEL SWETT.

Vitnesses JAMES MCKEEN, A. B. AMERMAN.

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