US45204A - Improvement in locomotive smoke-stacks - Google Patents

Description

STATES PATENT FMC-it SETE HAM, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND WILLIAM H. MCGAFFERTY, OF ALEXANDRIA, VIRGINIA. i

llVllPPtOVEMEN'l' IN LOCOMOTIVE SWlOKE-STACKS.

Specification forming part of Letters Patent No. ldd, dated November 22, 1864.

T0 u-Zlwhom t may concern:

Be it known that I, SE'rH HAM, of Philadelphia, Pennsylvania, have invented an Improvement in Locomotive-Stacks; and I do hereby declare the following to be a full, clear, and exact description ot' the same, reference being had to the accompanying drawings, and to theletters ot' reference marked thereon.

My invention consists, first, in a deiiecting-plate and inner casing so formed and ar ranged in respect to the inner pipe and outer casing of a locomotive-stack, that the steam and products of combustion i'rom the pipe will be directed tirst to the lower part of the stack, and then to the top of the latter, a uniform blast being thereby produced; secondly, in certain plates and an inner casing, formed and arranged substantially as described hereinafter, to arrest the sparks and prevent their escape from the stack.

ln order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanyingl drawings, which form a part ot' this specilication, Figure l is a vertical section of my improved ocomotive-stack, and Fig. 2 a sectional plan on the line l 2, Fig. l.

A is the inside pipe, which is secured to the locomotive in the usual manner, and is surrounded by a 'unnelshaped casing, B, at the upper end ot' which is a vertical liange, a.. rIlie casing Bis closed at the lower end, and to the top of the liange a is secured a plate, D, in the center ot' which is a circular opening, b, and round the edge of the latter extends a i'lange, d, for a purpose described hereinafter. With inthe casing B, and surrounding the pipe A, is a funnelshaped inner casing, D, open at its lower end, und having at the top a vertical liange, e, the latter being attached to the outer casing by stays j', the lower end ot the casing D being connected to the pipe A by stays g.

The stacks heretofore used have been so constructed that a partial vacuum is formed within the stack after each discharge of the steam from the exhaust-pipes, the tendency of the vacuum thus formed being, tor an instant, to greatly increase the draft, which, therefore, instead of continuing in an uniform current, consists of an irregular succession of puffs at great-er or less intervals, as the speed of the engine diminishes or increases, the iire being caused to burn away more quickly in some places than at others, creating sparks in such quantities that it is impossible to prevent large numbers from escaping from the stack.

In my improved stack the steam and products of combustion from the pipe A will be thrown against the under side ofthe plate E, and will be deiiected downward by the latter until they strike the inner side of the casing D. Between this casing and the pipe A they will continueto pass downward and through the bottom of the casing, then upward (as shown by the arrows) between the casings I) and B into the upper part ot' the stack, from which they escape through the opening` between the plate E and the lower edge ofthe iiange d, passingthence out of the stack through the opening l).

It will thus be seen that the steam and products of combustion, after escaping from the pipe A, are rst carried to the lower part of the stack, and thence to the top, and that such particles of dust or sparks as may be thrown from the pipe A will he deiiected downward by the plate E and deposited in the lower part of the stack, or will be carried upward between the casings B and D to the upper part of the stack, from which they will fall after striking against the top plate, C, on the lian ge d.v I have found by experiment, however, that with a stack constructed in the manner above described but few sparks are produced, the steam and products of combustion being retained within the stack for such a length ot' time after their escape i'rom the pipe A, that a uniform draft is created, the fire burning regularly over its entire surface, and giving oit' but few sparks.

I claim as my invention and desire to secure by Letters Patent- 1. The curved delecting-plate E, and inner funnel shaped casin g, D, arrangedin respect to the inside pipe, A, and outer casing, B, substantially' as and for the purpose specified.

2. The plate E, inner easing, D, and plate C., with its liange d, arranged in respect to each other and the inner pipe and outer casing substantially, as set forth, for the purpose described.

In testimony whereof I have signed my name to this specification in the presence ot' two subscribing witnesses.

Titnesses CHARLES E. FOSTER, J onu WHITE.

BETH HAM.

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