US601216A - Steam-boiler - Google Patents

Description

(N0 Mo'dei.) 2 Sheets-Sheet 1.

J. J. TONKI'N.-'

STEAM BOILER. No. 601216. Patented Mar. 2231898;

WITNESSES 2 Sheefis--S heet 2.

A TTORNE y.

J. J; TONKIN.

STEAM BOILER.

Patehted Mar. 22, 1898.

(No Model.)

' WITNESSES:

'UNITED STATES PATENT OFFIcE.

JOHN ZIAY TONKIN, OF OSWEGO, NEW YORK, ASSIGNOR TO JOHN EATON,

OF PITTSBURG, PENNSYLVANIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 601,216, dated March 22, 1898.

Application filed February 23, 1897. Serial No. 624,642. (No model.) I

To whom it may concern.-

.Be it known that I, J OHN' JAY TONKIN, a citizen of the United States, residing at Oswego, in'the county of Oswego, State of New York, have invented certain new and useful Improvements in Steam-Boilers; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings,in which Figure 1 is a longitudinal central section of a steam-boiler embodying my invention. Fig. 2 is a vertical transverse section of the boiler and fire-chamber on the dotted line 2 2, Fig. 1. Fig. 3 is a horizontal section of the firebox and water-legs of the boiler on the line 3 3, Fig. 1. Fig. 4 is an enlarged detail sectional view of a portion of the fire-chamber and deflecting-partition, illustratingv the preferredv form and arrangement of the fire-brick which constitute the deflecting-partition of the fire-chamber. Fig. 5 is a longitudinal central section of a steam-boiler embodying my invention, showing a modified arrangement of the deflecting-partitions; and Figs. 6 and 7 are vertical sectional views takenon the dotted lines 6 6 and 7 7, Fig. 5, showing,

respectively, the anterior and posterior or bridge and pendent deflecting-partitions.

Like symbols refer to like parts wherever they occur.

My invention relates to that class of steamboilers having an included combustion-chamber and commonly known as internallyfired boilers, and has for its object the production of a simple and efficient steam-boiler of the portable locomotive pattern.

One feature of my .invention, generally stated, involves the combination, in an includedcombustion-chamber boiler, of an outer shell, an inner shell, water-tubes which cross the included combustion-chamber and connect the heads of the inner shell, a deflecting-partition arranged in'the included combustion-chamber and composed of a series of tiles or bricks whose cross-sectional area substantially corresponds with the space included by a group of the water-tubes, and hand-holes arranged in the outer shell in line with the water-tubes which traverse the included combustion-chamber, whereby the water-tubes may be removed and repaired without displacing the deflecting-partition of the included combustion-chamber.

A further feature of my invention embraces the combination,with the water-legs and blowoff, of an inclined perforate plate or plates arranged in the water-legs of a steam-boiler and forming a mud-chamber therein for facilitating the blowing off of the mud and sediment.

There are other minor features of invention, all as will hereinafter more fully appear.

I I will now proceed to describe my invention more fully, so that others skilled in the art to which it appertains mayapply the same.

In the drawings, 1 indicates the main shell of a steam-boiler, preferably of general cylindrical form, as well as sufficiently elongated to accommodate an internal combustion-cham her without materially reducing the waterspace of a boiler of given horse-power, said shell being extended down, as at l, at the fire-box end and provided with an exit-flue at the fire-box end of the shell.

2 indicates an included shell of the same general form as the main shell, but of less dimensions, the shell 2 having downward eX- tensions 2 which, in conjunction with the extensions 1" of main shell 1, constitute continuous water-legs, which inclose and form the fire-box F, which fire-box is coextensive with the forward end of inner shell 2 and with which it has an unobstructed communication,

and said inner shell has its exit-flue in like position or to register with the exit-flue of outer shell 1.

The major portion of the inner shell 2 back of the fire-box F and which constitutes the combustion-chamber C is preferably corrugated, as indicated at 2", as thereby the shell is materially stiffened and the water-surface proportionately increased.

The heads 2 2 of the included shell 2 are connected by a series of water-tubes 3, which not only brace the inner heads and afford support for the deflecting-partitions of combus tion-chamber 0, but also increase the watersurface and facilitate the circulation; In the outer shell 1 and in line with said tubes 3 at both ends are a series of hand-holes 3 whereby the said water-tubes a may be readily cleaned of scale or other deposit and removed for repair when necessary.

1 indicates a series of hollow stay-bolts, which connect and brace the corresponding heads of the outer or main shell 1 and the included (or coinbustion-chainber) shell 2, and said hollow staybolts are so placed between the water-tubes 3 as to allow of the introduction of steam-jets (or equivalent means) into the combustion-cha1nber for cleaning the exposed or outer surfaces of the water-tubes E indicates the exitiiue, which leads from the internal combustion-chamber O to a suitable smoke-stack, and the location of said exit-flue will depend upon whether longitudinal or transverse deflecting-partitions are employed in the included combustion-chamber to prolong the travel of the products of combustion after the same leave the fire-box F. For many reasons I prefer to employ a longitudinal transverse partition et, (see Fig. 1,)

which at the front is interposed between the fire-box F and the crown-sheet, thus preventing the overheating of the crown-sheet, and which extends backward, terminating at such point within the shell 2 as will leave a suitable throat for the passage of the products of combustion into the space (or return-flue) above said partition 4. \Vith such an arrangement of the deflecting-partition, the exit-flue E should be at the same end of the boiler as the fire-box. If, however, a different construction is desired, the deflecting-partitions may take the form of a bridge-wall 4 and pendent wall l (see Figs. 5, 6, and 7,) in which case the exit-flue E will be at the end of shell 2 distant from the fire-box F. However the deflecting-partitions of the combustion-chamber C may be placed, I prefer to construct them of a series of separate firebrick 5, the cross section of which corresponds to the space included between a group of the water-tubes or between a group of the water-tubes and the shell 2, and with a plurality of tube-seats 5 so arranged and disposed that the bricks constituting the partition will be supported and held in position by the water-tubes 3, while at the same time individual water-tubes may be withdrawn from time to time and replaced or renewed without displacing the fire-bricks constituting the flame-deflecting partition.

In the water-leg of a steam-boiler and in the presentinstance between the pendent portions 1 2 of the shells l and 2, or that portion which incloses the fire-box F, I arrange one or more inclined perforated plates 6 (see Figs. 1, 2, and 3) at such distance from the bot tom of the water-leg as will form a mud-chamber 7, with which the blow-off cock 8 communicates, and so arrange that the total area of the perforations in the inclined plate 6 shall be less than the area of the blow-off cock 8, whereby the pressure in chamber 7 is reduced when the blow-off cock is opened, thus facilitatiu g the discharge of the mud and sediment from the water-leg above the inclined perforated plate (3.

In the case of a rectangular water-leg of the character constituting the lire box of the steam-boiler I prefer to employ a series of four separate plates, (see Fig. 25,) the communica tion between the chambers formed thereby being closed and each chamber provided with its own blow-off cock, so that no angles or obstruetions to the free flow of the sediment will be formed to interfere with the thorough efficiency of the devices.

Ilaving constructed a steam-boiler substantially as hereinbefore pointed out, I prefer to set the same time at such an inclination say an inch to the footas will insure that the distant ends of the water-tubes 3, or those farthest from the fire-chamber F, and those located beneath the horizontal deflecting-partition 4 shall at all times be below the water level, even when the water is low in the boiler. The water-tubes which are above the parti tion 4: or next the crown-sheet over the fire box, being protected from the direct flames of the lire and subject only to the practically spent products, will be preserved by the interposed fire-brick deflecting-partition 4 from injury in case the boiler-water should fall nearly or quite to the level of the partition at the front thereof.

In setting a boiler embodying my invention only a sufficient brickwork is required at the front to afford a foundation and constitute an ash-chamber beneath the gratebars, so that little heat is lost in that direction, while a short pier at the rear and a sad dle and rollers will accommodate any expansion and contraction of the boiler.

Among the advantages incident to a steamboiler constructed in accordance with my invention is that the fire and combustion chambers are entirely within the boiler, so that all heat generated must pass by absorption to the boiler-water, and none can be lost by radiation other than that due to radiation from the boiler-water, and this can be reduced to a minimum by the use of an asbestos or other suitable boiler-covering, there being no brickwork to obstruct the jacketing of the boiler, to absorb and radiate heat, or to crack and admit air-drafts to the coinbustion-chamber.

A further advantage of my invention consists in the ability to remove, repair, and replace the water-tubes without disturbing the deflecting-partition of the combustion-chainber.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a steam-boiler, the combination with an outer shell having a downward extension and an exit-flue located above the same, of an inner shell of like form, said inner shell constituting an included fire-chamber and combustion-chainber, a series of water-tubes which traverse the combustion-chamber and connect the heads of the inner shell, a horizontal rearwardly-extending deflecting-partition composed of a series of brick or tile whose cross-sectional area corresponds substantially with the space included by a group of Watertubes, and hand-holes in the outer shell and in line with the Water-tubes, substantially as and for the purposes specified.

2. In a steam-boiler, the combination With a water-leg, of an inclined perforate plate arranged to form a mudchamber in said waterleg, and abloW-off cock beneath the plate, substantially as and for the purposes specified;

3. In a steam-boiler the combination with February, 1897.

l JOHN JAY TONKIN.

Witnesses:

EDWARD FRANKLYN COLE, JOHN EATON.

Correction in Letters Patent No 601,216;

It is hereby certified that in Letters Patent No. 601,216, granted March 22, 1898, upon the application of John Jay Tonkin, of Oswego, New York, for an improvement in Steam-Boilers, an error appears in the printed specification requiring correction,

as follows: In line 82, page 2, the word time should be stricken out; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed, countersigned, and sealed this 29th day of March, A. D., 1898.

[SEAL] WEBSTER DAVIS, I Assistant Secretary of the Interior. Oountersigned:

O. H. DUELL,

Commissioner of Patents.

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