US399030A - Stove - Google Patents

Description

(No Model.)

N. J. GRAHAM.

STOVE.

No. 399,030. Patented Mar. 5, 1889 large heat'absorbing surfaces, and that they UNITED STATES PATENT rrics.

SPECIFICATION forming part of Letters Fatent No. 399,030, dated March 5, 1889.

Application filed February 26, 1886. Renewed February 5, 1889 Serial No. 298,790. (No model.)

To all whom it may concern.-

Be it known that I, NANCY J. GRAHAM, a citizen of the United States, residing at Jackson,in the county of Jackson and State of 7 Ohio, have invented certain new and useful 3 Improvements in Stoves; and I do declare the following to be afull, clear, and exact descrip tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon,which form a part of this specification.

Figure 1 is a front view showing my improved heating apparatus applied to a stove. Fig. 2 is a diametrical section through the stove from side to sitle. Fig. 3 is a top view of the stove-body, showing the hot-air and smoke outlets.

My invention consists in a novel arrangement of air-heating pipes in stoves, which will be fully understood from the following description, when taken in connection with the annexed drawings.

A designates the base of the stove, with its hearth a, ash-box b, and ash-pan c.

13 designates the grate; G, the fuel-feeding door; D, the body of the stove; D, the cap or top, and E the outlet-collar for the smoke-pipe leading to the chimney.

F F F are the air-heatingconductors, which for description I will divide into lower exter nal pipes, (Z (Z d, which extend from points below the stove-hearth a, through this hearth, and into the body of the stove, as clearly shown in Fig. 2. These pipes orcooi-air feeders d are suitably connected to and communicate with the lower contracted ends of enlarged airheaters e e c, which are of the bulging shape shown in the drawings and inclined so as to form a contracted space directly above the grate for partially arresting the ascent of the products of combustion rising from the grate.

It will be seen that the heaters e a iiiord very will allow the cool air entering them to expand freely as it becomes highly heated,thus afiording hot-air reservoirs. These heaters,

which are located above the grate, do not detract from the general appearance or design of the stove, nor do they interfere with supplying fuel to the grate.

To the upper contracted ends of the airheaters e are suitably attached pipes f ff, which I make of the tapering or upwardlyfiaring shape shown. in Figs. 1 and 2, for the purpose of affording a large amount of heating-surface, and also for contracting the passage directly below the smoke-pipe collar E, and thereby retaining the heated products of combustion in the upper part of the body of the stove as long as practicable. These pipes f pass through the top of the stove, and are designed to have connected to them pipes leading to upper or adjacent apartments for warming them and for other purposes where heated air is desired.

I may apply valves or dampers to the airinlet pipes d, by means of which the supply of cool air can be regulated, and, if desired, I may connect the lower ends of the pipes at with a pipe leading out-of-doors, and thus supply fresh air to the heaters.

The operation of my stove is substantially as follows: The products of combustion rising from the bed of fuel are at first contracted about the bulging heaters e, and after rising above the enlarged parts thereof the products are expanded and then again contracted as they approach the outlet E. The reverse of this takes place with the air in its course through pipes F, the air-heaters c, and the upwardly-flaring pipes f.

I am aware that it is not lnoadly new to arrange air-heating drums, rings, and bulging cases in the combustion-chambers of stoves and furnaces; nor is itbroadly new to conduct air into said receptacles by means of pipes entering the wall or bottom of a combustionchamber above the grate. I therefore disclaim such devices broadly and separately considered.

Having described my inventioml claim- 1. The combination, with a stove, of an an nular series of ainheating tubes having contracted upper and lower ends, and bulging intermediate portions arranged in the combustion-chamber to form a centrally-contracted space for the ascent of the products of combustion, the pipes cl, leading through the stovehearth and through the wall of the stove and communicating with the lower ends of said tubes, and a series of upwardly-flaring pipes connected to the upper ends of said tubes and leading out of the stove through its top, sub; F

stove around the outlet E, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

. NANCY J. GRAHAM. Vitnesses:

EVA GRAHAM, E. C. POWELL.

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