US174100A - Improvement in metallurgic furnaces - Google Patents

Description

a. WILLIAMS.

'METALLURGIC FURNACE.

Pat ented Feb. 29, 11876.

N PETERS, FHOTO-LI'KMOGRAPHER, WASHINGTON D C veying the heated gases JOSEPH WILLIAMS, OF SHARPSBURG, PENNSYLVANIA.

IMPROVEMENT IN METALLU RGIC FURNACES.

Specification forming part of Letters Patent N 174, 100,

dated February '29, 1876 application. filed January 24, 1876.

To all whom it may concern:

Be it known that I, JosEPH WILLIAMS, of Sharpsburg, State of Pen in the county of Allegheny and nsylvania, have invented a new and useful Improvement in Metallurgic Furnaces and I do hereby declare that the following is a fulL and exact description thereof, reference being bad to the accompanying drawings and to the letters of reference marked thereon.

In metallurgic furnaces the gases, after performing their office in the workingchamber, are usually carried off through the stack.

Now, the object of my invention is to utilize the heat which is usually carried off by condium of a line, to a stack, which is placed at the end of the furnace having the fire-chamber, and connecting the worki ng-chamber with the stack through the medium of a flue, in which is placed an injecting device, which serves the double purpose of transmitting the gases from the stack over the fire-place to the workingchamber, commingling said gases with air, steam, or gas, and discharging them directly upon the working-bed.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

In the accompanying-drawin gs, which form part. of my specification, Figurel is a side elevation of my improvement in metallurgic furnaces. Fig. 2 is a vertical longitudinal section of the same.

In the drawings, A. represents the fire-chamber of the furnace; B, the working-chamber; O, the flue leading to the stack D, which communicates with a line, 6, passing over the firechamber to the working-chambeh: Within the stack and flue e is an ejectingpipe, f, for directing the ascending gases in the stack back through the flue 0 into the workingcham ber B, by forcing, through the medium of a fan or other suitable device, a current of air,

back, through the mesteam, or gas through the pipe j, which currents of air, steam, or gas will draw the gases from the stack D, which, commingling with the currents of steam, charged directly upon the bed in the workingchamber, thereby greatly adding to the heat within the furnace, and thus utilizing the heat of the gases usually carried off through the stack. The stack is furnished with a damper, s, which may be utilized in controlling the volume of gas passing from the stackthat is to say, when the-damper is closed a greater volume of gas from the stack will pass through the flue 6 into the working-chamber, and when the damper is opened a less volume will pass through the flue einto the working-chamber.

It will be seen that as the flue e is placed directly over the fireplace it will be highly heated, restoring to the gases the heat lost during their passage through the flue 0. It will also be seenthat the mixed gases are discharged directly upon the working-bed B before having any opportunity to combine with the gases rising from the fire-place.

I do not claim the combination of a furnace and pipes or-flues arranged to combine other gases with those'from the furnace and return the mixed gases to the furnace; but

I claim- 1 The combination, in a furnace, of the fireplace A, working-bed B, stack D, injectingpipe f, and flue e, gases above the fire-place from the stack to a point above the working-bed, as set forth.

2. The combination working-bed, and stack, of the injectingpipe f and flue 0, whereby the gases passing from the stack to the workingbed are reheated without being mingled with the gases rising from the furnace, as described.

JOSEPH WILLIAMS. Witnesses:

A. O. JoHNs'roN, D. I. K. RINE.

air, or gas, will be dis-- arranged to convey the with the fire-place,

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