US75491A - Improvement in coal-stoves - Google Patents

Description

[JASPER vAN wonMEa AND MICHAEL MeeAnvEn on ALBANY, NEW YORK.

I IMPROVEMENT IN y COAL-STOVES.

` i lpeeijicction forming partof Letters Pate/nt No. 75,491, dated March 10, 1868.

Burnin g, and Return-Fine Coal-Stoves; and we declare the following specification, with the Vdrawin gs forming part thereof, to be a fulland complete descriptiou'of our invention.v

Figure 1 representszthe stovein central vertical section; Fig. 2, in perspective, with a portion of its external shell removed to show its interior construction; Fig. 3, a horizontal section in the line of the grate, showing the arrangement of cheek-plates with their registers; Fig. 4, one of the modes of constructing the mouth-piece of the` magazine-cylinder.

Similar letters denote the same parts of the apparatus.4

A is the outer shell; B, the nre-pot; D, the 4ash-pit; E, the downward-draft flue; G, the base-flue; Gr, the grate; H, the smoke-pipe nozzle; J, the door; K, the magazine, which, as shown, is an interior cylinder suspended within the outer casing or shell ot' the stove, so as to leave a free space or spaces for the passage of air between its upper edge and the top plate of the stove; W, the opening at the top for the supplying of coal tothe magazine.

Our first improvement is for the purpose of preventing the escape ofthe fumes of the coal or smoke from the stove while the magazine is being supplied with fuel;

It is well known that inail magazinestoves, whether the magazine be,A attached closely to the top plate or is detached wholly or partially therefrom, whenever .thev top opening is uncovered to introduce coal, there is an `immediate tendency for the fumes of the coal, which is always moreor` less heated, to pass out at the top opening of the stove.. To obviate or reduce this evil, it has been found necessary to make' the top opening of small diameter, so much so that the coal could only be supplied by the use ot' scuttles, made for the purpose, with funnelishaped spouts, since the ordinaryshaped scuttle would scatteritscontents over a surface much larger than the opening.

To remedy this evil we employ the following device: The opening W, in theftop plate of i escaping up through the funnel.

thestove, is made about as large as the diameter ot' the magazine. Within this opening there is suspended a funnel or hopper, M, whose upper edge is litted snugly to it. This funnel extends downward a distance about 4equalto half its top diameter, its lower opening being contractedto such sizeV as will just permit the passage, without clogging, of the coal into the magazine. The upper cover oi' the stove L fits upon and closes the top of the Vfunnel. This arrangement of the funnel applies equally to stoves in which the magazine is closely fitted to the top plate, or detached partially or wholly,'as shown in the drawings.

The practical operation of the apparatus is this: Whenever the cover is removed from the funnel, the tendency of the hot gases generated by the coal and occupying the vacant upper part of the magazine is to rise and pass 1 out of the top opening.

In the case of the detached magazine, the outside air is drawn'in through the funnelby thedownward draft of the stove, and, as it enters the magazine through the lower contracted opening of the funnel, it meets the gaseslrising from the coal, or occupying the vacant upper part ot'l the magazine, deiiects them, and mingling with them, passes off over the upper edge of the magazine, and so down,

by the ilue P, into iiue E.

Practically it is found that the cover of the stove may be left oft' without any ot' the gases The current of air entering the magazine is not that due to the lower opening of the funnel alone, but is Our next improvement is the adaptation of a removable mouth-piece to the magazine.

The body of the magazine being made of thin metal, it becomes necessary to ,attach a mouth-piece ot' thicker material to withstand the heat to which it is exposed. Such mouthpieces will, after a while, burn out, and must be replaced, which is commonly done by taking oft the top plate of the stove, removing the magazine, unriveting the old and riveting on a new mouth-piece-an inconvenient and expensive operation.

We attach to the lower part of the sheet-iron cylinder a narrow cast-iron ring, a, with a flange, c, formed on its bottom edge, projecting a short distance inward of the cylinder. A mouth-piece, D, of cast-iron, is provided, whose external diameter will permit its passage through the flange e, having on its outer upper edge a ange or rim Iitted to rest upon e. The effect of this arrangement is, that the mouth-piece b can at any time be withdrawn, and a new one entered through the magazine, simply by lifting off the funnel, which will leave a free passage for b.

Another mode of construction is shown in sectional diagram, Fig. 4. There a rin g ot' 1netal,like a, but without a flange, is employed, andthe mouth-piece f is itted over the ring and attached to it by pins, p fitting into slots in f, like lamp-sockets, or by any convenient, easily-operated fastenings, so that a new mouth-piece can be attached without the use of screws or rivets.

Our last improvement consists in an arrangement to preserve the tire-pot from injury.

In base-burning or return-flue stoves, that part of the side due E lying between the repot B and above the exit-passage H is occupied by a check-plate placed across it to prevent the flame from converging too suddenly toward the exit. producing eddies in the draft above it, induces a deposit of ashes upon it, and against the tire-pot, causing a rapid burning out of the spot wherever the ashes lie. To permit the frequent removal of the ashes, without dismantling the stove, the check-plate l is pierced by openings n, and is covered by a slide register-plate, x, operated by a handle projecting through slots in the outer casing of the stove. The shaking of this register will drop the ashes into the bottom of the base-flue C.

What we claim as our invention, and desire to secure by Let-ters Patent, is

1. In base-burning or magazine stoves, a funnel or hopper attached to or supported by the top or outside casing of the stove, in combination with the open-top magazine-cylinder K., as and for the purpose set forth.

2. The perforated check-draft plate l, in a downward-draft flue, provided with a register, x, so arranged as to pass the soot and ashes that collect upon them through the register and plate into the escape-flue, when the register is traversed for that purpose.

JASPER VAN WORMER. MICHAEL MCGARVEY. Witnesses:

RICHT). VARICK DE WITT, D. W. DE WITT.

The position of this plate,

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