US340102A - Fire-box for boilers - Google Patents

Description

(No Model.)

J. T. OORBBTT.

FIRE BOX FOR BOILERS.

No. 340,102. Patented Apr. 20, 1886.

l m 'nu IlNrTnn STATES PATENT OFFICE.

JOHN T. CORBETT, OF AURORA, ILLINOIS.

FIRE-BOX FOR BOILERS.

LPECIFECATION forming part of Letters Patent No. 340,102, dated April 20, 1886.

Application tiled March E2, 1886. Serial No. 193,737. (No model.)

T0 c/,ZZ whom t may concern:

Be it known that I, JOHN T. CoRBE'rr, of Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in 'Fire-Boxes for Boilers and in Parts Connected Therewith; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying' drawings, and to letters of reference marked thereon, which form a part of this specification.

My improvements relate to the fire-box and its connection with the boiler, and will clearly appear from the following description.

'l have shown my invention as applied to a magazine-boiler, and in which the magazine extends in a curve from the fire box or pot upward around the exterior of the boiler, as in my application for United States Letters Patent, Serial No. 185,284, filed December 10, 1885.

In the drawings, Figure l is a cross-section through the irebox,magazine,and horizontal boiler; and Fig. 2 a vertical longitudinal section, showing also the connection of the tirebox with the boiler.

The fire-box A is hollow, having within it an ample waterspaee,b. It is preferably made of cast-iron, but may, if desired, be made of boiler-plate and riveted, and it is, as shown, closed at all sides, top, and bottom, the waterspace b having direct connection with the water in the boiler by means of the pipes O C, one on each side of the boiler.

The tire-box is preferably made circular, but it may be square or of any other suitable shape, or conformable to or adapted for the shape of the furnace.

The re-box I prefer to make with a projection or flanged portion, d d, which may also be hollow, as shown, to increase the inclosed water-space, and this permits it to be readily set in the brick-work or masonry of boilers of various constructions, the fire-box being an independent piece of the structure, and not integral with or forming a part of the walls of the furnace or boiler, and the grate bar or bars or the support for the same may, by reason of the form of the fire-box, be attached to and held by it, as shown at c e in Fig. l.

In the construction shown the inner edge of the top of the fire-box, as seen atff, forms a. rest for the end ol the curved part of the magazines G G. In some cases only one magazine G may be made, extending up at one side only of the boiler.

The large water-holding space b, in conjunction with the large heating-surface of this fire-pot in direct proximity to the burning fuel, largely increase the steam-generating capacity of the boiler, and these, through the agency of the pipes C C, aord means whereby a constant and perfect circulation of water is at all times secured. It will also be readily understood that besides these advantages the water within this fire-box (which may be considered as an endless tube) affords a protection against the destructive tendency of the fire, and renders the lireebox as durable as the boiler itself. The magazines when employed also further increase the steaming capacity of the boiler.

Other forms of fuel-supplying magazine or magazines may be used, so long as it or they communicate directly with the fire-box, and the latter, as shown, is located under the boiler, and the pipes O, as 'also the magazine or magazines G, are inclosed within the masonry or outer walls, substantially as shown. The heat generated is therefore almost e11- tirely utilized, having but little opportunity to escape.

I claiml. In combination with a horizontal boiler having a fuel-supplying magazine communieating directly with the fire-pot, a waterholding fire-box located under the boiler, and closed at all sides, and communicating by pipes inclosed within the masonry or outer walls with the water in the boiler, all substantially as set forth.

2. In combination with a horizontal boiler having a fuel-magazine communicating by curved feedingpassages directly with the firepot, a spacious water-holding fire box or pot and hot-water pipes C C, each connecting the upper` part of such water-holding box with the water in the boiler, all substantially as and for the purposes set forth.

3. A water re-pot constituting a spacious 5,hol1ow water-chamber closed at all sides, provided with an extension or projection, and suspended or supported thereby in the masonry or casing of the boiler, combined with two similar and inclosed tubes, C C, one on each side, severally connecting such water- Io chamber with the water-space in the boiler.

JOHN T. CORBETT.

Witnesses: Y

E. T. PRINDLE, CHARLES L! ALLEN.

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