US1670038A - Rabble furnace - Google Patents

Description

May 15K, 1928.

A; N. JETTE RABBLE FURNACE Filed Sept. B, 1926 Patented May 15, 1928.

UNITED, STATES PATENT OFFICE.

ABCEIE NOEL JETTE, F ANACONDA, MONTANA.

BABELE rammen.

Application led September v8, 1926. Serial No. 134,273.

or equivalent refractory material, separated kfrom the shaft by an air space, and supported by means of suitable rings attached to the central shaft at the level of each hearth.

This means of supporting the mantle is disadvantageous in that the brick-Work is not very firmly supported and the motion of the shaft frequently causes the component bricks to drop out, thus exposing the shell of the central shaft.

This invention has for. its object to provide an improved method of supporting and.

retaining the brick-work of the mantle with a view to increasing the working period of the same. y

It has been found that superior results are obtained by the use of metal reinforcing rods `which engage thebricks at points on their vertical meeting faces, which reinforcing rods rest upon the supporting rings and engage the inner circumferential surfaces of flan es positioned upon the upper and lower surfgaces of said rings. As a result of this method of reinforcement the bricks are held firmly in place in the mantle, and the life of the mantle is increased.

Any suitably constructed furnace structure capable of handling the material to be treated may be utilized in connection with the present invention. A

For a full understanding of the invention perspective 4view` of asingle or use in' the construction of ferent types are so well known that for the sake of simplicity the furnace proper will be indicated only by the portions of the 4 hearths 9 adjacent the central shaft.

reference is made to the accompanying.

According to this invention the bricks 1 employed for this type of construction have complementary recesses 10 at the midpoint of each end face, semi-circular in cross-section, and of al radius slightly greater than the reinforcing rod 5. The method of constructing the mantle preferably is asv follows. One complete vertical course of brick 1 is laid upon the supporting ring 2 attached to the shell of the cent-ral shaft 3, in 'such manner that the semi-circular,` recesses at the ends of said bricks register. The mantle preferably is of such inside diameter as to allow a suitable air space 4 between the mantle and the shell 3 of the central shaft. Reinforcing rods 5 are then setvinto place in the circular recesses between the bricks, and

the next complete vertical vcourse is laid,

continuing thus until the mantle is completed.

i The reinforcing rods are held in place by the inner circumferential surfaces of annular flanges 6 positioned upon the upper and lower surfaces of the supporting ring* 2.

I also propose an improved construction of a lute ring which is applicable to the mantle structure herein disclosed. In a previous United States` v:Patent No. 1,535,160, dated April 28,1925, a lute ring construction was shown in which the lute. ring was placed upon. the supporting ring 2 without being rigidly attached thereto, thus permitting expansion or contraction of the one 'without affecting the other, and by this means preventing .breakage caused by unequal expansion. A similar type of construction is to be employed in connection with the present invention with the following change.' Figure 1 of the Patent No. 1,535,160, shows a portion'of the lute ring .of such a shape as to lie upon the upper surface of the rib of the supporting ring 2 and positioned between the latter and the bottom vcourse of brick. I now propose to construct the lute ring 7 in the form shown in FigureV 1 of the accompanying drawings. The depending flange 8 of the lute ring 7, having the shape shown in the drawing, is fitted between the upper fiange of the supporting ring 2 and the outer face of the brick 1,and does not interfere with the retaining lugs 6 and the reinforcing rods 5.

It is obvious that changes in the forms of the several parts could be effected without luz',

departingfrom the scope of the presentA invention. Thus, the recesses in the end faces ofthe `bricks could be fashioned to effect contact with a reinforcing rod which might be square, hexagonal or oval in crosssection. Or openings may be provided through the body portion of the bricks for the reception of the retaining rods. Likewise changes in the exact form of the lute ring as shown might be made without departing from my invention which is particularly pointed out in the appended claims.

I claim: y

1. A rabble furnace of a type having an insulating mantle surrounding a central' shaft and carried by supporting rings there'- on characterized by the fact that. the bricks ycomposing said mantle are maintained ,in

position by vertically disposed reinforcing rods which pass through the mantle and engage said supporting rings.

2. A rabble furnace as claimed in claim 1, wherein the meeting ends of adjacent bricks are provided with complementary recesses which form vertical passages for the reception of said reinforcing rods.

3. n a rabble furnace, thecombination With a central shaft of supporting rings attached thereto and having annular flanges thereon, an insulating mantle surrounding said central shaft and supported by said supporting rings, said mantle comprising brick- Work and vertically disposed reinforcing rods positioned Within recenses occurring 111 said brick-Work and retained by said annular flanges. v Y

4. A rabble furnace as claimed in claim 3 in Which an annular lute ring having a depending circular iange is supported on the outer flange of an annular supporting ring. In testimony whereof, I affixv my signature.

ARCI-IIE NOEL JETTE.

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