US337927A - Portable brick-kiln furnace - Google Patents

Description

SAMUEL P. CRAFTS, OF HAMDEJ, CONNECTICUT.

PORTABLE BRICK-KILN FURNAC'.

ef. s.

CATIOW-'orming part of Letters Patent Nol 337,927, dated Marcil 16, 1836.

Application tiled December 18, 1883. Serial No. lso'. (No model.)

.To all whom it may concern:

Beit known that I, SAMUEL P. Gnarls, a citizen ot' the United States, residing iu the town of Hamden and State of Connecticut, have invented a new and useful Improved Portable Brick-Kiln Furnace, of which the following is a specification.

My invention relates to a portable brickkiln furnace, and has for its object to provide a furnacefor burning coal, which maybe easily shifted from one kiln to another.

The invention consistsin the novel construction and arrangement of the parts of the furnace, as hereinafter more fully describedand particularly pointed out in the claims.

In the accompanying drawings, Figure l represents my improved furnace andthe meth od of its practical application to a brick-kiln. Fig. 2 is a view ot' one ot' the double transverse bars of the furnace base or frame, and Fig. 3 represents the inode ot' arranging and securin e,` the grate-bars.

Referring to the drawings, A designates a brick-kiln built up in the usual and well-known manner and having the common transverse horizontal fire-arches B at the bottom. The sides of the kiln are faced with the ordinary non-conducting walls or casing, C, consisting of burned brick plastered over with clay. An aperture, l, for the passage of heat, is left in the casing at the mouth of each arch and lined with tire-brick to withstand the action of the heat. Above this aperture is a smaller one, e, which communicates with the peak or highest part of the arch.

In front of each 'tire-arch, and entirely exterior to the kiln, is a portable furnace consisting of a series of U-shaped arches, 7L, made of rire-clay and arranged upon an iron base 0r frame, which also supports the re-grates The supporting-frame is composed of a pair projections r on their meeting ends, which set into the space between the two parts of the middle double bar. The opposite ends ofthe grate-bars simply rest on the transverse bars, and are therefore free to expand and contract. A furnace-front or door-plate, p, is arranged against and covers the front. end of the arches B. It is bolted at the bottom corners to the ends et' the bars a, and its upper part is braced by diagonal stays s, secured near the middle oil" the bars. The rear ends ot the furnaces abut against the face ofthe kiln around the apertures or throats Z, through which the heat passes freely into the arches. An airtube, t, is placed over each furnace, with one end resting on the furnace front and its opposite end inserted into the aperture c. The joint around the tube where it enters the wall is calked with clay and made air-tight. A loose brick wall, u, is laid up between the furnace-fronts, and the arches and tubes are buried under a bank of sand, earth, or loam, w, to prevent the radiation ot' heat. The sand contiguous tothe furnace and around the tube t becomes heated, and the tubes deliver a current of hot air into the peak of the arch for the purpose ot' facilitating` and perfecting the combustion of the heated gases, and also giving a deeper red color to the bricks. The tube also serves as a peep-hole through which the interior of the flue may be viewed.

Any kind of sand may be used for banking up the furnaces; but the fine striking-sand used in brick-making is the best for this purpose, and may in this manner be dried for use without eXtra expense. These furnaces are placed on both sides ot' the kiln, one at each end of the arches B. The heat passes from the furnaces through the apertures into the arches, and thence between the bricks, and the tubes t supply a sufficient quantity of heated air to oxidize the bricks, and thereby give them a deeper red color. It is evident that the arches may be formed rectangular or otherwise than U-shaped, and made in single pieces, or in half-sections joined at the top. If desired, the supporting base or frame may be formed iu one piece, having the transverse bars integral with the longitudinal bars.

The advantages of this furnace are that it is inexpensive, easily moved from one kiln to another, and admits the use of coal in place of IOO wood, thereby lessening the. expense and producing superior bricks.

I claim as new and desire to secure by Letters Patentl. A portable furnace for brick-kilns, cousisting of a grate frame or base erected eXterior to the kiln, a furnacefront or door-plate secured to the base, an arch of lire-clay mounted upon the grate frame or base and covered with sand or other noueonducting material banked against the face of the kiln, and an air-tube arranged over the furnace Within the covering, with one end inserted into the easing of the kiln and communicating with the peak ofthe fire-arch for admitting heated air to the interior of the kiln, substantially as and for the purpose described.

project-ions r at their meeting ends which are adapted to t between the sides of a double transverse bar, m, substantially as described.

SAMUEL P. CRAFTS.

NVituesses:

DAVID K. ANDREWS, EARLLIss P. ARvrNE.

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