US392894A - Center-draft bell-bottom base-burner heating-stove - Google Patents

Description

' (No Model.)

I E. B. THOMAS.

CENTER DRAFT BELL BOTTOM BASE BURNER HEATING STOVE. No. 392,894. Patented Nov. 13, 11888.

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UNITED STATES PATENT @EErcE.

CENTER-D RAFT BELL-BOTTOM BASE-BURNER HEATING-STOVE.

SPECIFICATION forming part of Letters Patent No. 392,894, dated November 13, 1883.

Application filed November 22, 1857. Serial No. 255,935. (No model.)

To all whom it, may concern.-

Be it known that I, EDWARD B. Thomas, a citizen of the United States, residing in the city and county of San Francisco, and State of California, have invented a new and useful Center-Draft Bell-Bottom Base-Burner Heating-Stove, of which the following is a specification.

My invention relates to improvements in stoves, which will be understood by reference to the accompanying drawings.

Figure 1 is a view of a stove embodying my improvements,thesanie beingpartlyinvertical section and partly in elevation. Fig. 2 is a sectional view taken on the line 00 :c, Fig. 1; and Fig. 3 is a view of one of the ash-pans removed.

The followingis the construction of the same:

A represents a drum, composed of sh eet-iron,

. in appearance like the drum upon the top of a stove of ordinary construction; B,the magazine,of cast-iron,with cover 0 of ordinary construction; D, the outer case of the stove,made of such metal as the use of the stove may require, either casting or sheet metal; E, the grate, of casting, such as is usually employed in that class of construction; F, the center cone-shaped chamber, generally of cast-iron; G, the smoke or draft pipe generally employed in heating; H,the upper connectingpipe for connecting the pipe G with the drum A. I represents the damper to open and close the circulation ordraft through the connecting-pipe H when required. J represents the ash-pans, which are of a semicircular form and supported upon the usual base-plate in the ordinary manner. K represents the shaker. L represents the cold-air-supply pipes. M represents the damper in the pipe G. Grepresents the bellshaped outer shell or case-of the stove; H, the cap of the pipeGto prevent the fuel from dropping into the same. 1? represents the dividing-bar which directs the ashes into the ashpans.

The following is the operation ofmy improvements in stoves: The-fuel is placed upon the grate around the cone-shaped chamber,and the current of air arising through the fuel or grate passes up to the top of the cone within the fire-chamber and is drawn down through the pipe G. Thus, in addition to the reverberatory effect produced, an increase of heating-surface is secured equal to the surfaces of the cone-shaped chamber F and pipe G.

It should be observed that the chamber F, which I have here illustrated as of a truncated conical form, is closed at its upper end, or, in other words, has no communication with the fire-chamber. Thecold-airpipesLare designed to conduct cold air into this chamber F and discharge within the same, near the upper portion thereof, the air thus introduced coming in contact with the heated walls of the said chamber and also the draft-flue G, as well as intermingling with the radiated heat from both, after which by the fresh supply of cold air a draft is caused, which forces the heated air down within the conical-formed chamber, where it is discharged into the room where the stove is located.

I have found that the cold-airpipes may in some cases be dispensed with,and when an oblong or oval chamber has been employed and such chambers multiplied a very good result is had; but I prefer to use the cold-air tubes, as I have found by experience that a better re sult is accomplished by the employment of such.

In placing the fuel in the stove it is fed through the feed-pipe B. The damper I being open and the damper M closed, the direct upward draft is thus established. As soon as the fire is properly burning, the damper M is opened and the damper I closed. The current of hot air is thus carried down through the pipe G, allowing the heat to radiate from the pipe G and the cone-shaped chamber F. The increase of heating-surface,in addition to the air-supply from the pipes L, more than doubles the heating effect with the same amount of fuel.

I do not desire to confine myself to a conical form central chamber, as the same principle of invention may be carried out by constructing the chamber in an oblong or oval form or with an under hotair chamber of any description where the central downward draft is socured and the reverberatory effect described is produced.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a stove, the combination of the central cone-shaped chamber, the smoke or draft pipe having one end arranged within the said chamber, the cap on the said pipe above the chamher, and the cold-air pipes having one end opening within the chamberand the opposite end opening beneath the stove, substantially as specified.

2. In a stove, the combination of the coneshaped chamber arranged therein, the draftpipe G, having one end passing upwardly through the chamber and provided with a cap, H, the pipe H, connecting the upper portion of the stove-body with the draftpipe and having a damper, as I, and the damper M in the said draftpipe below the point of connection of the pipe H, all substantially as specified.

EDWARD B. THOMAS.

Witnesses:

JOHN H. REDSTONE, L. E. REDSTONE.

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