US308864A - Soft-coal cook stove and range - Google Patents

Description

(No Modell.)

I. B. SAWYER 8u T. CLARK.

SOPTGOAL 000K STOVB AND RANGE.

Eo. 308,864. Pate d Dec. 2, 1884.

NrTnn STATES PATENT OFFICE..

IRVIN B. SANVYER AND THOMAS CLARK, OF QUINCY, ILLINOIS.

SOFT-COAL COOK`STOVE AND RANGE.

SPECIFICATION forming part of Letters Patent N0. 308,864, dated December 2, 1884.

To all whom t may concern; y

Beit known that we, IRVIN B. SAWYER and THOMAS CLARK, citizens of the United States, residing at Quincy, in the county of Adams and State of Illinois, have invented a new and useful Improvement in SoftCoal Cook Stoves and Bauges, of which the following is a specification.

Our invention relates to improvements in soft-coal cook stoves and ranges; and the objects of our improvements are, first, to heat the front, bottom, and back plates of the oven with hot air in conjunction with the direct heat from the lire passing over the top of the oven; second, to afford facilities for the distribution of the direct heat from the iire equally over the top of the oven and under the top plate of the stove or range. Ve attain these objects by the arrangements illustrated in the accompanying drawings, in which* Figure l ris a longitudinal section of the stove, taken vertically on the line y y of Fig. 2. Fig.- 2 is a plan view of the stove with the top plate of the stove removed. Fig. 3 is a plan. Fig. 4 is a side view of the stove. Fig. 5 is a section on line 1 1 of Fig. 1. Fig. 6 is a section on line a: x of Fig. 1.

Similar letters refer to similar parts th rough out the several views.

On the top plate, B, is placed the elevated ue A, as shown.

C C are vertical` partitions between the top plate, B, and the top plate of the oven O, forming three dues, S S S, over the oven O for the passage of the direct fire-heat, as indicated by the arrows b b. The center flue S discharges through the hole Kin the top plate, B, into the flue-box A, thence by the pipe-exit P to chimney.

D D D are dampers secured toa rod pass ing through the plates G C, as shown, for the purpose of regulating the direct draft. The

center damper is fixed at right angles to the two side dampers.

4E E are two vertical curved plates at the rear end ofthe two outside fines, S S. These plates are joined to the two side plates, N N, and are separated opposite the 'cent-er flue S, leaving a passage for the hot air from the chamber H .the plate M, Figs. 1 and 5, to the chamber H3,

Fig. l, at the bottom of the oven O; thence through the chamber H", at the rear of the ov'en O, it passes between the plates E E, and4 forms a junction with the direct heat from the fire, producing a more perfect combustion.

I, Figs. 1 and 2, lis an outer air-chamber for the more perfect protection from outside temperature of the hot-air chamber H around the oven O.

L is an interposed shellbetween the hot-air chamber H3 and the chamber I, and J is the ash-box. i

N are the side and bottom plates of the stove or range, and P is the exit-pipe for smoke.`

The arrows indicated by the letter a show the direction of the hot-air around the firebox F and oven O, and those indicated by the letter b show the passage of the direct fire heat.

Heretofore cooking-stoves adapted to burn soft coal have generally been so constructed that the product-s of combustion were carried around the oven through various flues to heat the same, thereby causing an accumulation of soot in the fines, which in time prevent the passage of the heat b blocking the flues. This soot was'liable to e red by the sparks and llame from the fire-box.

It has been suggested to form a chamber about the fire-box with openings to the outer air for the admission of fresh air, and provided with channels leading under the oven and be hind the same, connected with thischamber, to heat the oven by hot air, the products of combustion passing over the top plate of the Oven tothe rear where the exit-pipe was located, and where it met with the current of heated air rising from the flue at the rear of the oven. This arrangement was quite as obj ectionable as the old form, as the heavy pro- IOC) ducts of combustion would, after being deiiectcd against the rear Wall of the stove, fall to the bottom of the rear iiue, and in a very short time accumulate soot and ashes to such an extent in the bottom of the flue as to stop the proper circulation of the hot air.

Our invention is designed to overcome these objections and difliculties by carrying the products of combustion to the exit-pipe Without coming in contact with the rear Wall of the stove, and Without crossing any of the hotair iiues, and by heating the front, bottoni, and back of the oven by heated air from a heating-chamber around the fire-box.

Our next improvement consists in the arrangement of the flues over the top oveirplate, which are three in number. The direct heat from the iire passes along each side to the center iiue, where a junction is formed with the hot air from the rear plate of the oven, and is rcturned through the center flue to find its exit through the lue-box on top of the stove or range. By this arrangement We get an equal division ofthe direct Vlire heat over the top ovenplate, and also an equal draft on the tire, the result of which is the coal is consumed equally as readily at the sides as at the center ofthe fireboX, by which the durability of the fire-plates are enhanced as well as the heat more equally distributed. By the Hue-box on top of the stove or range We not only getan equal division of the lines below, but obtain a direct up- Ward draft to the discharge-pipe, thence to chimney. Ve also by this device retain the mid dle back pot hole or opening in an elevated position, rendering it much more convenient for use than when placed on a level With the other openings. The hot-air chamber around the bottom and rear end of the oven is protected from outside temperature by an outer air-chamber.

Having fully described our invention, what We desire to claim and secure by Letters Patent isl. In a stove, the combination of a hot-air chamber surrounding the fire-box, passages leading therefrom forming a continuous flue for the hot air around the front, bottom, back, and top of the oven, an exitiiue arranged directly above the oven and Out of direct line with the h0t-air iiue at the back, anda flue or lues from the ireboX to said exit-pipe, whereby the products of combustion pass to the exit pipe Without crossing the hot-air-ilue openings, substantially as described, and for the purpose set forth.

2. In a stove, the combination of a hot-air chamber surrounding the fire-box, passages leading therefrom forming a continuous iuefor the hot air around the front, bottom, back, and top of the oven, andan eXit-iue arranged directly above the oven and out of direct line with the hot-air flue at the back, with ilues for the products of combustion arranged upon the top plate of the stove formed with the Walls C C and having the dampers, whereby a direct or indirect draft is obtained by the movement of one lever, substantially as described.

3. In a stove of substantially the form described, the combination, with the exitilue arranged above the oven and out of direct line With the hot-air flue at the back, of the ilues for the products of combustion, the walls C C, dampers D D, and the deflecting-plates E E, all substantially as described, and for the purpose set forth.

RVIN B. SAVYER. THOMAS CLARK.

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