US115959A - Improvement in base-burning stoves - Google Patents

Description

s. LHEwE's.

Improvement in Base-Burning Stoves.

Patented .lune 13', 1871.V

UNITED STATESV PATENT OFFICE.

SHUBAEL E. HEVVES, OF ALBANY, NEW YORK.

IMPROVEMENT IN BASE-BURNING STQVi'lS.

Specification forming part of Letters Patent No. 115,959, dated J une 13,1871.

N ttt-ure and Objectsyof the Invention.

This invention relates to a stove adapted for burning anthracite coal, and primarily del .signed for the heating of school and audience rooms where it is desirable to economize heat and to completely envelop the walls of the stove. My great object -is to warmapartments by the circulation of air, in contradistinction -to direct radiation of heat. To this en d I provide a jacket or casin g extending continuously from the bottom plateof the stove to the top thereof, so as to protect the walls of the rechamber from exposure at any part and form a space or chamber through which, Vbymeans of suitable registers, the air of the room may be passed, so as to warm the apartmentwith great rapidity, after which the registers may be so adjusted as to deliver into they room warm fresh air from outside. The invention further consists in improved modes of constructin g and connecting the parts of the iirepot and casing, as hereinafter described..l The invention further consists in providing within the hre-chamber, directly above the grate, an

annular plate converging downward toward the grate, and having around and beneath it a space to which air isadmitted from the outside, and within which the said air is heated to a high temperature, after which it is delivered around the lower edge of the said plate, to the burning fuel, directlyabove the grate. The invention further consists in constructing the lower part of the magazine of aplate, at-l tached as hereinafter described, projecting down into the nre-chamber and made removable, so that it may be renewed as often as required. 'lhe invention vfurther relates to an approved mode of forming a serpentine smokeiiue in the annular space between the magazine and the air-chamber.

Description of the Accompanying Drawing.

Figure 1 is a vertical section of my improved stove in the plane indicated by the plinew, Figs. 3, 4, and 5. Fig. 2 isla side elevation of the same, partly in section. Fig. 3 is a horizontal section thereof on the line 3 3, Fig. 1.

Fig. 4 is a horizontal section on the line 4 4, Fig. l. Fig. 5 is a horizontal section on the line 5 5, Fig. 1. Fig 6 is' a vertical section (detached) of the cast plate shown at B3 in Fig. 1.

General Description.

A may represent an air-chamber or duct beneath the bottom B of the stove.K In the said bottom are formed any suitable number of openings, b, for the passage of air from the duct A. G is the ash-pit. D may represent a grate of common construction. lIhe bottom plate B is cast with annular flan ges to receive the shell, within which the ash-pit is located, and also the lowerpart E of the casing, which completely surrounds the stove.

This portion E of the casing is preferably.

made of cast-iron, in order that it may possess suiiicient strength and rigidity. It is lsurinounted by an ornamental iian ged plate, El, to which the third section Ezel" the casing is attached, which section reaches to the top of the tire-pot F F1. This re-pot is made of two frusto-conical sections jointedl together at f, and secured, by means of short'wires, G, to the connecting-plate B, the construction of which plate is more fully shown in Fig. 6. The plate El may be cast in one piece, its inner part e supporting the base of the fire-pot. A e

plate or plates, b1, either hinged or elseiitted to slide either vertically or around the plate El, form, in connection with apertures in the latter, a register, by which air may be admit. ted or discharged at this point. H represents a plate for heating air to support combustion. The upper edge of said lplate forms a tight joint with the fire-pot F, while its lower part projects tov a'sufiicient extent to leave a space around and beneath it, to which air to be heated is admitted through the apertures h. Air, having been` heated to a high temperature withinthis space, is'allowed to pass beneath the lower edge of the plate H, above the grate, in direct contact with the incandescent fuel. By this means much more active combustion is Amaintained than if the interstices of the grate were relied on for the supply of airLI represents the fuel-magazine,

extending from near the top of the stove downward to the plate B3. 'Beneath this is a supplementary piece, I', which is made removable, and constitutes in effect the lower end of the magazine, projectiu g downward within the combustion-chamber F1, so as to increase the capacity of said chamber. From the plate B3 also rises a sheet-iron shell, J, connected at top with the flue K, through which the gaseous products of combustion are finally discharged. The space between the magazine I and the shell J constitutes an annular ilue, which is divided by horizontal annular plates L L. Beneath the annular plate L is an extension, F2, of the combustion-chamber, into which extension the gases rise freely through extended openings b2 in the plate B3, and to which air is supplied through the ducts l2, which are controlled by an annular register, Z3, Figs. l and 2. l, Fig. 4, represents an opening by which the gases are allowed to pass from the combustion-chamber through the annular plate L. M1 M2 M3 represent vertical partitions, the first, M1, extending from the annular plates L to L; the second, M2, extending from the annular plate L nearly up to the annular plate L; the third, M3, extending downward from the annular plate L nearly to the annular plate L. By this arrangement the gases rising through the opening l are conducted up between the partitions M1 M2, thence down between M2 M3, and again up between M3 and M1 to the opening Z1 in the annular plate L', above which they are diffused through the upper annular chamber so as to completely part with their heat before they are discharged through the iiue K. N represents the feeddoor, the jambs of which are connected with the upper annular plate L, and form a chute or conductor across the annular iiue, in order to permit the introduction of fuel into the upper part of the magazine. O O are capplat-es, one adapted to slide upon the other, and so perforated that they constitute a register for the discharge of air, which is heated within the annular chamber between the Hueshell J and the external casing A3. The openings b3 in the plate B3 permit the passage of air through said plate.

By means of the register b1, applied to the plate E1,heated air may be discharged beneath the projecting rim of said plate when required for warmin g feet or for other purposes. When this is to be done the upper register O is to be closed. If both the registers are opened the nieuwe effect will be to take air in at b1 and discharge it at O', by which means the air within the room may be passed through and heated with great rapidity, instead of taking air from the outside.

To put the stove together it is only necessary to piu the wires G to the upper ange of the fire-pot F, hook them into eyes provided for this purpose in the under side of the plato B3, and to rivet the sheet-iron cylinders to the proper flan ges on the cast plates. This mode of construction is very advantageous, in leaving all the parts free to expand and contract independently, and dispensing entirely with long wires or bolts extending from bottom to top of the stove.

Claims.

I claim as my inventionl. In a stove, constructed substantially as herein described, the continuous casing E surrounding the stove from the hollow base B to the top 0, and employed in connection with the base ducts and the two sets of registers b1 and O', substantially as and for the purposes explained.

2. The combination of the upper combus tion-chamber F2, fire-pot F F1, register Z3, and annular plate L, as and for the purposes speciied.

3. The fire-pot F F,construeted of two converging portions connected by a joint, f, and secured by means of short Wires G to the plate B3, substantially as herein described.

4. The annular air-heating plate H, constructed and applied in connection with the fire-pot F and grate D, and air-ducts h, substantially as and for the purposes specified.

5. rI he magazine I I, constructed in separable parts, connected through the medium of the plate B3 to admit of the removal and renewal of the lower part I when required.

6. The combined arrangement ot' the horizontal annular plates L L and vertical partitions M1 M2 M3, adapted substantially as herein described to impart a serpentine course to the heated gases on their way from the lire-chamber to the discharge-flue K.

` S. E. HEWES.

Witnesses:

WALTER ALLEN, WM. H. BRERETON, Jr.

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