US311802A

US311802A - Puddling and heating furnace

Info

Publication number: US311802A
Authority: US
Publication date: 1885-02-03
Anticipated expiration: 1902-02-03

Description

(No Model.)

.T. H. BENNETT.

PUDDLING AND HEATING FURNACE.

No. 311,802. Patented. Feb. 3, 1885.

Eya? J2 l/ W/ I t- NITE a'rnnir met,

THOMAS H. BENNETT, OF IRONTON, OHIO, ASSIGNOR OF TVVO-THIBDS TO D. LINN GOUOH, OF SAME'PLAOE, AND A. L. STOUT, OF DAYTON, OHIO.

PUDDLING AND HEATING FURNACE.

SPECIFICATION forming part of Letters Patent No. 311,802, dated February 3, 1885.

Application filed March 7', 1884. (No model.)

T all whom it may concern:

Be it known that I, Tnonas H. BENNETT, a citizen of the United States, residing at Ironton, in the county of Lawrence and State of Ohio, have invented certain new and useful Improvements in Paddling and Heating Furnaces, of which the following is a specification.

My invention relates to improvements in furnaces for puddliug or heatingiron; and the objects of my improvements are, first, to ecoir omize fuel in the processes of puddling and of heating iron; second, to so thoroughly fuse the flue-cinder that it shall readily flow off when lapped; third, to cause a more powerful draft through the furnace,and, fourth, to prevent the passing off of black smoke and oftensive gases by the chiiinney. I attain these objects by means of the furnace illustrated in the accompanying drawings, in which Figure l isavertical longitudinal section of a puddling furnace embodying my improvements. Fig. 2is atop view of the same. Fig. 8 is a transverse vertical section through line L M, Fig. 2; and Fig. 4 is a face and edge view of a single brick with an air-hole through it.

Similar letters refer to similar parts throughout the severalviews.

A A are air holes or passages made through bricks in the crown of the furnace. B is the 33 neck of the furnace. O is the tap-hole for fine cinder. D is the stoke-hole. E is the firegrate. F is the ash-pit. G is the fire-bridge.. H is the flue-bridge. I is the charging'door. J is the chimney or fine. K is the crown of the furnace.

I build this furnace of the materials, dimensions, and designs in use for other puddlingf urnaces; but I make one or more air-passages, A A, through its crown K, and leading from 40 the outer air into the neck 13 of the furnace. To make these air-passages A A, I use the brick illustrated by Fig. 4t, having ahole, A, through it from one bed-face to the other. I lay these brick on end in longitudinal courses, as shown 5 in Fig. 1, so that their air-holes A form acontinuous air-passage, A A, from the front of the furnace to the beginning of the neck 13, as shown in Figs. 1 and 2.

I have shown two air-passages, A A, Figs. 2 l

and 3; but Iuse one or two or more,according l weaken the crown K in any manner.

to circumstances. I find it desirable to make my perforated brick longer than the ordinary brick used for building the crown of a pad dling-furnace. So, when the ordinary brick are nine inches long, I make my perforated 5 brick about twelve inches long, so as not to I find one inch and a half a suitable diameter for hole A; but it may be made larger or smaller, pro; vided it gives air'passages capable of admitting the quantity ofair required. I use a slidevalve at the outer end of the air-passages AA to close, open, or partly open the air-passages A A, as may be desired. I have not shown this slide in the drawings, asitis awell-known device, and is easily applied. It. will be observed that these flues receive air at the front only of the .furnaeaand not at a point between its front and rear extremities. It will also be noted that these air-passages are located directly over the fuel-chamber and the heatingchamber of the furnace, and that they extend in an unbroken line from the front of the former to the rear of the latter. It will also be perceived that the heated currents are dis charged not into the fuel-chamber, or into the heating-chamber, or into the flue above the bridge-wa] l,but are delivered at a point behind all these. It will further be observed that the currents pass in a practically direct line from the extreme front of the furnace to the rear of the puddling or heating chamber without defleeting or retarding angles, and that at their point of discharge into the neck they do not operate to obstruct or turn aside the currents 8 5 from the puddlingchamber to the chimney, but, flowing in the same direction and mingling with such currents, their added oxygen contributes to intensify the combustion, thereby eonsuming all carbonaceous substances and greatly accelerating the draft. This construction, it will be seen, is quite distinct, both in purpose and effect, from that in which air is received unheated and by a downward discharge into the neck of the furnace. 5

This furnace is started and worked like other puddllug-furnaces; but when a fire is kindled in it a draft is developed in chimney J, and crown K is heated to a high temperature. The draft in chimney .I draws air through the loo passages A A from the outer air into neck B,

and this air gets heated while passing through the hot brick. When thishot air enters neck B it mixes with the flame and hot gases pass-- ing off from the furnace, and its oxygen combines with and burns up all unconsumed carbon and combustible gasesit meets, This combustion intensifies the heat in the neck B to such a degree that the flue-cinder is thoroughly fused, and can be run off by tapping, also, the gases pass from the neck B at so high a temperature that they give a powerful draft in chimney J, and this gives a greater draft through the furnace and fire-grate E, which burns up the coal completely, and so prevents the loss of fuel incident to the raking of the fire when the draft is bad. As the flue-cinder is thoroughly fused in neck B and can be tapped off through hole 0, the labor and the injury to the furnace incident to the removal of the flue-cinder when solidified or viscid are avoided, and the formation of tea-cups is any blowing apparatus; but. the method of so connecting them is obvious and need not be specified.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a furnace for puddling or heating, the combinatiomwith the fuel and puddling chambers', of an air-passage, A A,within the crown of the furnace, extending from the front of the fuel-chamber to the rear of the puddling-chaniher, and discharging into the front of the neck, substantially as described.

2. In a puddling or heating furnace, an air passage or flue, A A, extending fromthe front of the furnace along the crown thereof to the rear of the puddling-chainber, such fiue being composed of a series of sections, A, placed face to face, and each provided with a single per- V foration, as described.

3. In a furnace, one or more airlines, A A,

extending along the crown of the furnace from the front of the same to the rear of the heating-chamber, and discharging into the front portion of the neck of the furnace, the upper portion of the neck constituting a continuation substantially in the same downwardly and rearwardly inclined plane of the upperportion of such fines, substantially as described.

THOMAS H. BENNETT. \Vitnesses:

WM. F. HASENAUER, HENRY G. SMYTI-I.