USRE5709E - Improvement in stoves - Google Patents

Description

a. smnn.

Stoves.

Raissued Dec 30 Jizuezzior.

X was UNITE STATES PATENT Drrron.

ELIHU SMITH, OF ALBANY ,NEW YORK.

IMPROVEMENT m STOVES.

Specification forming part of Letters Patent No. 88,986, dated April 13, 1869; reissue No. 5,709, dated December 30, 1873; application filed November 20, 1873.

To all whom it may concern:

Be it known that I, ELII-IU Snrrn, of the city and county of Albany, in the State of New York, have invented certain Improvements in l'lase-Burning Stoves, of which the following specification is sufficiently full, clear,-and exact to enable those skilled in the art to which the invention appertains to make and use the same, reference being had to the accompanying drawings, which form a part hereof.

My invention relates to base-burning coalreservoir heating-stoves; and consists, first, in an annular horizontal flue entirely below the ash-drawer, aslrpit, and stove proper, en circling an open chamber thereunder, in com bination with an extended descending flue which receives the heated and escaping gase ous products of combustion from the combustion-chamber, or from an annular flue surrounding the upper portion of the fire-pot, and discharges the same into the said annular flue below the stove, and an ascending exit-flue through which the said, gaseous .products are conducted to the chimney after traversing the said last-mentioned annular flue, the said descending and exit flues being so arranged with relation to each other that theentire volume of escaping gases is made to perform the entire circuit of said base-flue, as hereinafter more specifically set forth, the advantages of this part of my invention being found in the obtainment of a higher temperature of the extended radiating and conducting surface. Second, my invention consists, further, in the combination of the said descending flue and annular flue below the stove with the upper annular fine or flues before referred to, surrounding an annular section of the firepot, near the upper edge thereof, whereby a further exposure of radiating and conducting surface heated by the entire volume of escaping gases is obtained.- Third, my invention also consists in a fine open at both ends passing up from the ash-chamber, or from the bottom of the stove through ,the ash-chamber, through the fire-pot and fire or combustion chamber, and thereservoir or supplycylinder, to the top of the stove, provided with a damper and lateral-branch flues, whereby currents of air to be heated may be conducted from the aslrchamber, or from the bottom of a stove,

or from an open chamber thereunder, up through the fire-pot and combustion-chamber, or fire-pot, combustion-chamber, and reservoir, and out into the room, as hereinafter more specifically set forth. Fourth, my invention also consists in an annular arch-top combustion-chamber, in which one side of the arch forms a portion of the radiating-surface of the stove while the opposite side deflects the heat to the outer casing thereof.

In the annexed drawings, Figure 1 represents a vertical section, on line :0 m of Fig. 3, of a heating-stove having my improvementn incorporated into its organization. Fig. 2 is a vertical section on line 3 3 of Fig. 3 of that portion of the stove which is below the com bustion-chamber, showing the descending and the upper and lower annular flues. Fi 3 is a horizontal section taken at the top of the fire-pot, and showing in said section so much of the stove as is represented in Fi 2. Fig. 4 is a bottom view of my stove. Fi 5 is a perspective view of the upper portion of the fire-pot and the outer casing inclosing the 7 same, with a portion of the latter broken away, showing the upper annular and descending flues. Fig. 6 is a representation of the ashdrawer.

A is the base of the stove. Bis the ashchamber; 0, the fire-pot; D, the combustion chamber, provided with mica windows; and F, the coalreservoir, which latter is supplied through the feed-door f. a represents an annular space or chamber formed between the outer casing and the extreme upper portions of the fire-pot, receiving the products of combustion over and all around the upper edge of the latter, whence they may pass down through openings a and the larger openings cl into the upper annular flue b surrounding an annular section of the upper portion of the fire-pot, in which flue they pass horizontally, or nearly so, from the point of entrance to the descending flue d, which has its opening into the said annular flue next adjoining the upward opening (1 in said flue. This descending flue 01 extends below the base-plate and opens into an annular flue, E, thereunder, which annular flue conducts the escaping products of combustion in a circuit around to the front and again to the back of the stove, radiating and conducting the heat from all sides of said flue directly to the air within the room being warmed. From the annular flue E the escaping products enter the exit-pipe H, through which they are drawn to the'chimney after having given off by radiation and conduction almost the entire quantity of heat which they .the purpose of easily fitting the ash-drawer to the same. It is made cylindrical at that part which passes through the grate for the purpose of enabling the grate to rotate about the same. This vertical hot-air flue communicates with the open space in the room through lateral-branch flues, as represented at c, Fig. 1. These lateral flues pass from the main upright flue through the fire or combustion chamber, and through the outer casin g of the stove, for the purpose of discharging the heated air of the main flue lower down or nearer the floor than the top of the stove.

When it is desirable to discharge the heated air in the upper part of the room through the mouth of the flue at the top of the stove, the valve 8 in said flue is opened, as shown in the figure; but when it is desirable to discharge the heated air lower down in the room through the branch flue c, the valve 8 is closed, and the air is compelled to pass out through the lateral-branch flues.

. The vertical air-flue 0 opens at the base of the stove into a circular open chamber, G, thereunder formed by the annular flue E and the base-plate A. In this chamber the air may be heated to some extent before entering the flue O. This flue is gradually enlarged from a point within the fire-pot or combustionchamber to its top for the purpose of facilitatin g the expansion of the air passing through it.

If desired, the heating of air by direct contact with the outer surface of the fire-pot may be efiected by the formation of a chamber, I, between the latter and the outer casing surrounding the same, said casing being perforated, as shown in Figs. 1 and 2, and the air to be heated passed up from the chamber G through openings g, which would, in this case, beformed in the base-plate A, and, when so heated, would escape into the room through the perforations referred to.

The arrows in Fig. 3 indicate the direction of the escaping products of combustion as they traverse the several annular fines on their way to the exit-pipe II. p

h is an opening, closed by a cap, provided for the purpose of cleaning the annular flue E.

The top ofthe combustion-chamberis arched, as shown at y y, for the purpose of deflecting the heat to the outer casing or plates of the stove, thus securing a higher temperature of the radiating-surface, and gaining the full benefit of the combustion of the fuel.

I claim as my invention- 1. In abase-burning coal-reservoir heating stove or furnace, a flue below the ash-chamber and bottom plate of the stove, conducting the heated and escaping gaseous products of combustion in an annular circuit from the point of entrance to the point of exit therefroin, and passing them underneath the front edge or front portion of said bottom plate, in combination with an extended descending-flue for conducting said products into said baseflue, and an exit-flue for their escape after traversing said base-flue, the said descending and exit fiues being arranged in proximity to each other, whereby the gaseous products conducted into the said base-flue are made to perform the entire circuit thereof, substantially as set forth.

2. In a baseburning coal-reservoir heating stove or furnace, the combination, in communication, of an annular flue surrounding an annular section of the fire-pot, a base-flue entirely below the bottom plate of the stove, and an intermediate flue connecting the said base and annular flues, substantially as set forth.

3. In a base-burning coal-reservoir heating stove, an ascending air-flue, open at the top and bottom of the stove, extending through the fire-pot, combustionchamber, and reservoir, in combination with a branch flue, c, communicating with the outer air through the combustion-chamber and outer casing of the stove, said ascending flue being provided with a damper, located at a point above the point of junction of the two flues, substantially as and for the purpose set forth.

4:. In a base-burning coal-reservoir heating stove or furnace, a flue for conducting air to be heated, extending up through the fire-pot into the combustion-chamber, in which latter it is exposed directly to the heat therein, and communicating with the air without the stove, through the outer casing thereof, at a point within the circumference of said chamber, substantially as set forth.

5. In a base-burning coal-reservoir heating stove or furnace, an annular arch-top combustion-chamber, in which the inwardly-inclined side of the arch forming the top of said chamber extends without the magazine-chamber,

and forms a portion of the outer casing or radiating surface of the stove, and the opposite or outwardly-inclined side of said arch reflects its incident heat rays to the side first described, or the outer casing of the stove, substantially as and for the purpose set forth.

In testimony that I claim the invention as above specified I have hereuntoset my hand in presence of two subscribing witnesses.

ELIHU SMITH.

Witnesses:

JOHN GUTMANN, FREDK. FRASER.

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