US1285469A - Furnace-arch. - Google Patents

Description

1 ,285,69. Patented N0v. 19, 1918.

E. F. TFLLEY, 1B. FURNACE ARCH.

7 APPLICATION FILED FEB. 18. I918.

33313 (Blow 1e EDWIN F. TILLEY, .13., F PLAINFIl IELD, NEW JERSEY.

FURNACE-Anon.

Specification of Letters Patent. Patented Nov. 19, 1918.

Application filed February 18, 1918. Serial No. 217,745.

To all whom it may concern:

Be it known that I, EDWIN F. TILLEY, Jr., a citizen of the United States of- America, residing at Plainfield, New Jersey, have invented a new and useful Furnace-Arch, of which the following is a specification.

My present invention relates to furnaces,

particularly to furnaces of the so-called heat treating type, wherein a perforated arch is provided for separating the combustion chamber from the heatlng chamber. These arches are usually subjected to the direct heat of the burners, and this excessiveheat and the strains and stresses have resulted in the more or less rapid deterioration and breaking down of such arches.

The objects of this invention are to improve the arch construction and to provide an arch which will be capable of withstanding the heat and strain to which they are usually subjected.

The invention accordingly comprises an arch made of fire brick and the units of which are interlockingly connected by means of interengaging ribs and grooves on the meeting faces of the blocks or bricks composing the arch, said blocks having formed therein suitable passages providing the perforations in the arch. The arch is usually builtup with the interfitting ribs and grooves at opposite sides of the crown of the arch facing in opposite directions, and means are usually provided at the center of the arch for keying the two sets of blocks together.

. The accompanying drawing illustrates the invention embodied in a heat treating furnace of approved construction, but it will be understood that the invention is applicable to furnaces of diii'erent types, and that changes and modifications may be made without departure from the true spirit and scope of the invention.

In said drawings:

Figure 1 is a perspective view of a furnace. arch built into a furnace of the overfired type.

Fig. 2 is .a. fragmentary plan view of a portion of the arch. y

Fig. 3 is a perspective view of one ofthe arch blocks. 7

Fi 4 is a similar view of a slightly modified orm of block.

Fig. 5 is a fragmentary plan view of an 5 arch made up ofthe blocks shown in F 4.

In the illustration 5 designates the rnace body provided with a combustion chamber 6 in the upper portion thereof and heating chamber 7 in the lower portion thereof, said two chambers being defined by the perforated arch 8 which forms a partition separating the interior of the furnace into these two chambers.

This arch is made up of individual blocks or tiles 9 of heat resisting material ordinarily known as fire brick, said blocks being formed with passages 10 which provide the perforations in the completed arch.

The arch blocks are tied together and the arch thus unified, in the present disclosure, by forming the blocks each with an integral outstanding rib 11 on one side thereof, and a corresponding groove 12 in the opposite side thereof, said ribs and grooves interlocking substantially on the median arc of the arch as indicated bythe line 13.

Preferably alsovthe arch is keyed at the center or crown by key blocks 14 and the tiles at opposite sides of said crown are placed with the interlocking grooves and ribs facing in opposite directions. In the particular case disclosed. the blocks are placed with the ribs and grooves at opposite sides of the crown facing in opposite directions, away from the crown and toward the ends of the arch. This provides an arch of practically unitary construction and further provides that in case of any settlement of the arch, the blocks being keyed together at opposite sides of the crown, maintain-the original strength and solidarity of the arch. The reverse arrangement of the tiles at opposite sides of the crown also permits easy replacement of any individual tiles which may become broken or injured, by the stantially as indicated in Figs, 4 and 5.

' The blocks are usually made with a taper toward'their lower ends, the degree of taper depending upon the arc of the arch to be formed and may be made of fire clay molded under pressure and then baked.

By my invention sagging or breaking down of the arch is prevented and the arch is made much more durable and lasting and at the same time repairs can readily be made when they are required.

I claim:

1. A perforated furnace arch composed "of fire brick having passages forming openings through the arch, the bricks at one side of the median line of the arch having interiitting ribs and grooves facing in one direction' and the bricks at the opposite side of the median line having interfitting ribs and grooves facing in the opposite direction, and

keying means at the center of the' arch between said two series' of interlocked bricks.

2. A perforated furnace arch of fire brick having passages therein providing openings through the completed arch, said bricks having integral ribs and corresponding grooves in the opposite faces thereof interlocking with the bricks adjoining in the arch.

3. A tile for a perforated furnace arch composed offire clay provided with a passage forming a flue and having opposite sides tapered from the'top toward the bottom of the tile and formed with an out standing rib and a corresponding groove.

4. A perforated furnace arch of fire brick, the bricks of said arch having passages in opposite sides thereof cooperating when the EDN r. TILLEY, JR.

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