US19621A - Improvement in steam-boilers - Google Patents

Description

UNITED STATES PATENT OEEICE.

ABNER CLARK, OF FORT DES MOINES, IOIVA.

IMPROVEMENT IN STEAM-BO-ILERS.

Specication forming part of Letters Patent N o` 19,621, dated March 16, 1858.

To @ZZ whom it may concern.'

Be itknown that I, ABNER CLARK, of Fort Des Moines, in the county of Polk and State of Iowa, have invented a new and Improved Steam-Boiler; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figures l and 2 are vertical sections taken at right angles to each other in the lines a: x and y y, respectively. 3 is a horizontal section of the same in the line z e of Fig. 2.

Similar letters of reference indicate `correspending parts in the several figures.

This invention consists of a certain arrangement of tubular water and steam spaces, water- Walls, and connections in a steam-boiler to obtain a very extensive heating-surface and economize fuel, and at the same time insure a free circulation of water.

To enable others skilled in the art to make and use my invention, I will proceed to dcscribe its construction and operation.

A B are two upright hollow walls formed of metal plates and arranged parallel with each other to constitute the back and front or sides of the boiler.

C C are horizontal tubes connectingr the two walls A B, and arranged as close to each other as is consistent with a proper circulation of the flame and products of combustion from the fire-place, which is to be situated bclow them. These tubes are continued nearly to the top of the Water-walls.

D D are a row of tubes much larger than C O, connecting the upper parts of the walls A B and having a slight downward inclination from the wall A to the wall B, as shown in Fig. l.

E is a large tube connected at one end by an elbow, F, with the top of the wall A, and at the other end by a double elbow, G, with another tube, H, of similar size, or larger, and I is a cylinder of larger diameter than the tubes E H, connected by a double elbow, J, with the tube II.

The tubes E I-I and cylinder I are all made of a length nearly equal to the length of the tubes C C, added to the thickness of the two walls A B, to permit the whole to be inclosed Within a casing of sheet-iron or brick-work,

which coniines the products of combustion around the several tubes, the water-walls, and the cylinder I. The tubes O O are intended to be always iilled with water and the walls A B to be iilled or nearly tilled to the top, and the larger tubes D D to be iilled or partly filled with water. I prefer the level to be near the top of these latter tubes.

The cylinder I is the steam-chamber from which the steam is taken for use by the pipe ct. The tubes lll and II serve to convey the steam generated in and rising from the lower tubes and water-walls to the chamber I, and

in these tubes E H the particles of unvaporized water taken up in suspension by the steam are allowed to separate from the steam, and these tubes have both ran inclination in the proper direction for such Water to run back to the water-wall A. The flame and products of combustion from the lire pass between and around all the tubes in a circuitous course, and as they part with their heat to the water in the tubes become cooler as they rise. Thevsteam in the cylinder I is dried by the surrounding products of combustion, which by the time they have arrived at the said cylinder I have become so much cooled as to obviate all danger of burning the said cylinder. Above the steam-chest I there is an arrangement of pipes for heating the feed-water, all intended to b e inolosed within the furnacecasing. This arrangement of pipes I will proceed to describe.

The feed-pipe f enters the upper part of a small box, a, over the wall A, from the lower part of which box horizontal tubes b b run to the upper part of a box, c, over the wall'B, from which latter box an increased number of tubes, d d d, run into the top of a larger box, e, over the wall A, and from the lower part of the box e a further increased number of tubes, g g, run into the upper part of a larger box, h, over .the Wall B. From the lower part of box h a number of tubes, t' t', run to the upper part of al box, j, and from the lower part of this box a pipe, k, runs back under the box h, and rises outside of the box h to the lower one of two'compartments in a small box, Z, outside of the box o, and from this compartment of the box l a pipe, fm, descende to thewall B, where the water is received into the main body of theboiler. There is a pipe, n, leading from the upper part of the box 7b to an upper compartment of the box l, which compartment also has a communication With the upper compartment of the boX c, which is thus made to oolleet any steam that may be generated in the tubes d g t', and a pipe, 0, serves to convey such steam from the said box down to the top of `the Wall B. By the above arrangement of tubes and boxes the feed-Water is heated to a high temperature by heat Which would otherwise be Wasted.

I do not claim, broadly, the employment of a series of pipes for heating the Water and Collecting the Steam, nor do I Claim, broadly, the heating of the feed-Water by the escaping products of combustion; but the special ar- ABNER CLARK.

. Witnesses:

WM. SULLIVAN, SAML. CHAPMAN.

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