USRE6778E - Improvement in puddlino-furnaces - Google Patents

Description

2 Sheets-Sheet Z.

s. CADDIGK.

PUDDLING FURNACE.

Ressue. Dec. 7` 1875.

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-UNTED STATES PATENT OFFICE;

SAMUELCA-DDIUK. 0F PEMBBOK'E, MAILLE.

mmovsmsnr In PunnLme-Fuanscss.-

Speculation forming part of Letters Patent No. 70,322, dated October 29, 1867: reissue No. 6,778. dated December 7, 1,876; application tiled October 3, 1874.

nyin'g drawings, and .tor the letters' of reference maried thereon, making a part of i'this' specification.

t This invention is in thennature of animprovement in paddling-furnaces; and my invention consists in providing the air-blast box with a flange to support the bottom of the furnace, and supporting the bottom, in turn,

i `upon hollow bearers; in the means' employed toprotect the furnace-doorsin removable water-pipes arrangedaround the puddlingpit; in apeculiar waterlcasing to the fire-box; in the means employed in supporting the chim-` ney; and in ythe combinations of the ,various parts, all as more fully hereinafter explained.

Inlthe 'accompanying drawings, Figure 1 represents a central longitudinal section of my improved furnace; Fig. 2,a top view, with 'the stack and top ,of the furnace removed;

Fig. 3, a transverse section through the center of the puddlinglpit, looking toward the grate; Fig. 4, an end elevation ofthe furnace, showing the chimney or stack. Figui* is a cross-section of onel of the skeleton cornersupports on `the line x av in Fig.`4. Fig. 5 is a cross-section of the chiinneyor stack on the line y yin Fig. 4. Figs. 6, 7, and 7 are views of the frame-work or months of the furnace and their doors'and water-pipes. Figs. 8 and 9 are views of the paddling-door, and Fig. 10 a vertical central section vof the same.

Similar letters of reference indicate parts in the severalvgures.

A represents a puddling-furnace, which may be of any desired size, and constructed of the usual materials. Surrounding thatpart B of the fnrnacewhere the iron is puddled is a metallic-chill, C.` Thischillgi's hollow, or formed witha-continnous channelpassing within it.' On thetop of the chill (l, and surrounding it, are aixed infan y desirable way, watervpipes Drand tothe under side of the bed plate c are-secured water-pipes. a. E E represent the inner frame-work ormo'nths of the furnace.

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The am gmc or box is linea'wini a series of wrought-iron (tubes, b, rectangular in vertical section, placed closely one above the other, so

as to present smooth internal surface, and areicooled bythe e of water through thcmin any convenient manner, thus presenting ,an iron surface cooled bymwater, in-

may be inserted therein, and held in position by a dovetailed or angular liange, h, formed on the inner edge ofthe door.

My puddling-furnacebeng constructed sub stantially as above described, its operation is as follows: The re having been kindled on the grate Gr, the iron undergoing the process of pudllling is placed inthe bed B, and a blast being forced into the air-.blast box is supplied in any usual manner tothe lire-box). It will be seen, therefore,'that the means of supplying the blast is eflcaciousin two respects. It constantly circulates within the chill a current of cool air, which reduces the temperature of the chill and preserves it from burning, and by the time the air has circulated around the chill it has become heated suflcientl y to'forin, as it were, a hot-blast for the fn1|iace.-i"e,and thereby eiects a large saving in fuel, and consequent economy in the production of the iron.

In puddling-furnaces heretofore constructed the water-channels around the mouths of the furnace-doors, and beneath the paddling-pit and other places throughout the furnace, have been cast with the'several parts, so that when these channels were burned up, or the plates were fractured, it became necessary to supply new plates with new water-channels at a considerable expense, besides interrupting the operation of the furnace.

By my method of having removable pipes I- am enabled to avoid these inconveniences.

Secured to the. bed-plate c are water-pipes or in any way..

a. .These pipes are cast into the hedor botpper edge of the chill C is a water pipe or` pipes, D. This may' beonecontinuous pipe, or may be sections, and they are secured to thevupper surface 'of the chill by bracketsor lugs, or in any way, .so that when the chill burns out or is fractured the water-pipes remain intact, and are readily adjusted to the new chill when litted. This pipe receives its supply of water from any suitable watensupvply pipe, and discharges it into anysuitable outlet-pipe.

Instead of lining the inner of the inner or protecting doors I with re-brick in the orf dinary manner,`d epending upon cement and iron straps to hold the` tire-brick material in position, I east or otherwise form this door with a-iiange, h, having formed in its inner face an inclined recess, vi.- The lire-brick Jf are molded with their edges at an angle that will llt into this inclined recess, so that when they -are in position the last brick j, acting as a key,

will hold them all'ilrmly in position. 'Ihe advantages of this method of lining the doors are, that agg' partof the brick-work that has been burn warped, or otherwise destroyed, may with great facility be removed, and new sections replaced, without disturbing the whole lining, and also, the brick-work being confined by an equalypressure throughout, it is not so likelyv to ,Wtlp and bulge by the actionrof the heat as itwould otherwise do.

As is well known, the bit or ori dce K, th rough which the paddling-irons are introduced, is rapidly worn away by the friction of the irons against it, in which case the door is generally discarded for a new o ne. By my improve' ment T affix to the front of the door a movable wrought-iron hit, L, so that as the bit becoinesworn a new one may be replaced at once-withont disturbing the doorn This bit may be attached by slides or lugs and bolts,

. The brick-work of the chimney-stack is sup. rted by four skeleton columns, u, having `shaped inner edges M, which llt against the corners of the stack. These columns may be lconnected at top and bottom by suitable plates orclamps.' Y

The chill C is secured within the walls of the furnace in such manner that itl maybe readily removed when fractured, or otherwise injured, and anew chill inserted in its stead.

Having thus described my'invention, what I claim as new, and desire to secure by .Letters Patent, is-

1. In combination in a puddling-furnace, anair-blast box provided with a flange to support the bottom of the furnace, the furnace-bottom supported' thereon, and `hollow bearers uponwliich said bottom rests, all substantially as and for the purposes described.

2. In a paddling-furnace, the chill thereof provided with a water-pipe on its upper surface for cooling and protecting the/same, separate from and independent of said chill, so that said pipe may be removed for repair without disturbing the chill, substantially as and for the purpose described.

3. The combination ofthe bed-plate waterpipes, suitably secured in or to the under side of the same, and water-pipes around the tirebox, substantially as described.

4./ In combination, the tubular water-casio g b ofthe lire-box and the hollow bearers e, substantially as described.

5. In combination with a furnace-chimney, the skeleton metallic corner-supports of the same, constructed substantially as described.

6. In combination, the. bed-plateL'and the hollow water-bearers e upon which it rests,

substantially as described.

7. In a puddlingfurnace,'the doors thereof constructed with 'concave inner surfaces, and

`fitted with lire-brick having corresponding convex surfaces, in combingtion lwith angular flanges on the edges of t e doors, substantially as and for the purposes-described.

SAMUEL GADDIUK.

Witnesses:

W. K. CAMERON, WM. W. MCLAUGHLAN.

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