US403152A - Furnace-cover - Google Patents

Description

4 Sheets-Sheet'. 1.

Patented May 14, 1889.

W. SLBIGHER; Jr. FURNAGB COVER.

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W; SLBIGHER', JL PURNAGB COVER v No. 403,152.

Patented May 14, 1889.,-l

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W. SLEICHER, Jr. FURNAGB COVER.

No. 403,152. Patented May-14, 1889.`

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PURNACE COVER..

No. 403,152. Patented May 1 4. 1889;

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PATENT OFFICE.

WILLIAM SLEICHER, JR., OF TROY, NEV YORK.

FU RNACE-COVER.

- SPECIFICATION forming part of Letters Patent No. 403,152, dated May 14, 1889.

Application led November 6, 1888. Serial No. 290,087. (No model.)

To all whom t may concern.-

Be it known that I, WILLIAM SLEIcHER, J r., a resident of Troy, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Furnace- Covers; and I do hereby declare that the following is a full, clear, and exact description of the invention. that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Similar letters refer to similar parts in the several figures therein.

My invention relates to improvements in furnace-covers of the arch class; and it consists of the novel construction and combination of parts hereinafter described, and pointed out in the claims.

Figure l of the drawings is a bottom plan view of an arched iron beam adapted to support a row of bricks. Fig. 2 is a side elevation of the beam supporting a row of bricks. Fig. 3 is a top plan view of the parts shown in Fig. 2. Fig. 4 represents by the solid lines a cross-section of the beam, taken on the broken line a: oc in Fig. l, the dotted lines representing a brick and its auxiliary supporting-link. Figs. 5, 6, 7, and 12 represent in side elevation, detached fire-bricks, showing modified forms of channels for 'auxiliary supporting-links and key. Figs. S, 9, and 10 represent, in side elevation, modified forms of auxiliary brick-supporting links and key, the relative positions of the bricks and beam being indicated by dotted lines in Fig. 9. Fig. l1 is a cross-section of the iron beam similar to that shown in Fig. 4, taken at the broken line oo in Fig. 3. Fig. 13 is a top plan view of the brick shown in Fig. 12.

Bridge-covers for furnaces are composed of a series of iron girder-beams laid side by side,

each beam being arched and supporting an arched row of fire-bricks.

As heretofore constructed the beams have been made up of two arched metallic beamplates set on edge and secured to each other by braces and cross-pieces, with an air-space between, the upper'edges of the bricks resting against the lower arched. edges of the plates and held in place by end clamps only, pivoted to the ends of the plates and connected by an adjusting-rod extending the length of the beam. The effect of the intense heat to which furnace-covers are subjected was sufficient to warp and twist such beam-plates and to expand the adjusting-rod connecting the end clamps to such an extent as to soon destroy the sustaining-power of the arched beam and perm it the bricks to fall into the furnace, destroying or greatly impairing the roof.-

I form my supporting-beam of a single longitudinally and cross-sectionally or laterally arched beam of iron, thereby minimizing the effect of heat to weaken the supporting-power of the beam by reason of warping and twisting the same. It is well known that the heat is less int-ense at the ends of the beams, which are supported by side walls of the furnace, and I provide a cross-bar or lug near each end of the beam, to which one end of the adj usting-rods, passing through the end clamps, is secured, thereby lessenin g the length of rod and effect of the heat in expanding the same to loosen the. brick arch. It is well known that a row of bricks thus supported at its ends only in the form of an arch will when repeatedly subjected to intense heat be twisted and warped from its original position, and that frequently the change is sufficient to break the arch and cause the bricks to fall from their support. I provide an auxiliary support for the brick arch by securing individual bricks in the arch, located intermediately of its ends, to its supporting-beam, which prevents the brick arch from twisting or dropping away from its supporting-beam.

I have shown and described several kinds of auxiliary supporting mechanism for susnally-arched surfaces of which afford a bear- IOO o beam was cast.

6o the respective bricks.

Io vided with a clamp, A5, pivoted to the upper edge of the beam, as at A". The clamps are each connected with a cross-bar, A7, by a threaded bolt, AS, passing through the bar and clamp, and provided with a head on one side and an adjusting-nut, A9, on the other end.

Vhile the beam is bottom side up, as shown 1n Fig. l, thebricks can be laid thereon in the position shown by Figs. 2 and 8, and

2o the clamps drawn tightly against the end bricks by means of the bolts and nuts, after which the position of the beam can be reversed, as shown in Fig. i?, and the bricks, being slightly beveled, will be .retained in the 2 5 arched form by the clamps.

I have shown several forms ol auxiliary supportingdinks having heads adapted to enter and iit apertures formed by grooves or channels cast in the contiguous sides of the 3o bricks, and so located thereon as to register in pairs when the bricks are formed into an arch, each pair forming a link-receiving aperture.

The link B4, Fig. l0, is provided on one end 3 5 with a hook or head, Bil, adapted to iit the channel B8 in the brick B, Fig. 5, and be inserted one half in such channel and the other half in the supplementary channel in the contiguous brick, which channel is precisely the 4o same as that shown in Iiig. 5, and is not separately shown. The other end of the link is provided with an eye, B, adapted to receive the wire of a staple, B,

There may be any desired number of sta- A 5 Vples resting within the crossarch of the beam and secured thereto in any known manner. I have shown by dotted lines in Fig. +L one of the prongs of a staple embedded in the iron beam, where it could be inserted when the lVhen the yokes of the staples are made of considerable length, as shown, two or more links may be secured to the saine staple and slid along to properly adjust their position to the position of the bricks, so that they may project up through a vertical aperture between two bricks formed by grooves BT, Fig. 5, so arranged as to register with each other. The grooves 3T lead from the grooves BS to the upper surfaces of The rela-tive positions of brick, link and staple, and beam are fully shown, partly by dotted lines, in Fig. 4.

The link may be in the form o f a chain-lin k, the upper end being secured to a staple in the beam, as last above described.

I have shown such a link at Blll in Fig. ll. The upper end is adapted to receive the wire of the staple B, as shown, and the lower end iits the curved channel Bl in the brick, Fig. l.

The bricks may each have an aperture adapted to receive arod, C, which may extend the whole length of the arch, as indicated by dotted lines C in Fig. 2. lV ith the aid of such a rod passing through the bricks longitudinally ot' the arch, one or two links connecting the central parts of the rod and beam would positively secure all the bricks to the beam.

lVhether the bricks were perforated to receive the rod C or not, itwould be necessary that those contiguous to the link 31" should be provided with the channel B15 to allow the bricks to fully engage with each other in forming the arch. I have indicated by dotted line C2 in Fig. l2 the position of the aperture adapted to receive the rod.

The links can be secured to the lateral i'langes ot' the beam when desired, thus dispensing with staples B. Ihave shownalink, B, so adapted in Fig. il. This link is provided with a central joint, B10, and the ends are bent upward and provided withthe hooks B12, adapted to be hooked onto the lateral. iianges of the beam, as fully shown, partly by dotted lines, in Fig. 9. The channels B13, Fig. 7, in the bricks are made of a form adapted to receive the links after they have been hooked onto the beam. l/Vhen desired, the links can be riveted at the end upon the lateral iianges of the beam, one upon each side, and theii laterally-projecting heads adapted to engage with the ends of the brick, beveled on its upper edges, so as to clamp the brick between them and suspend it directly 'from the beam. I have shown such a form of link at B1, Fig. 1l, the upper end being secured to the lateral flange ot the beam, one on each side, by the rivets C3, and the lower end having the head or hook, B17, adapted to enter the cross-chan nel Bw in the brick. The cross-channels extend across the ends of the bricks, and have one of the channel walls nearly vertical, but slightly inclined inward, thereby giving the upper portion of the brick a dovctail appearance and effect, as shown in Figs. ll and l2. The links are first riveted. to the beam, as shown in Fig. ll, and the bricks slid into the position shown in Fig. ll, being moved longitudinally of the beam.

It is apparent that all the bricks may be thus secured directly to the beam by either o'l the kinds of links which I have described; but it is not necessary that all the link-heads should be connected with the beam.

Instead of the link-heads similar cylindrical or conical rods may be used and inserted in apertures formed by channels in the bricks, arranged to register with each other, as previously described. I have shown a conical or tapered rod, B2, in Fig. 8, and in Fig. 6 a channel, B', formed in one side of the brick. The opposite side of the brick has a similar channel. When two bricks having such channels engage with each other in the IIO arch, they form an aperture, B', Fig. 2, adapted to receive the rod or key B2, as seen in Fig. 2. It is manifest that when keys are thus inserted between the bricks one brick cannot slide past another brick to fall from the arch unless the arch spreads more than half the diameter of the rod or key, and if a pair of bricks at the central part of the arch or at intervals along the arch is linked to the beam, as previously described, and the intermediate bricks keyed in by the rods B2, as just described, it will be impossible for the arch to break or for any of the bricks to fall therefrom. A row of bricks can be thus suspended from a straight beam, dispensing entirely with the arch feature, though I prefer to slightly archv the beam.

Vhen desired, the brick-channels may be extended the whole length of the bricks, adapting them to receive either keys or links. I have shown by dotted lines in Fig. 5 the channel BS thus extended. It is apparent that all the bricks may be thus secured to the beam by suitable links inserted in channels in the contiguous sides of the bricks, or as many of the bricks as desired or deemed necessary.

It should be observed that the auxiliary brick-supporting links which I have shown and described are almost wholly inclosed by the bricks an d only project therefrom at their upper sides, thus deriving perfect protection from the direct action of the furnace-heat. Links thus inclosed by the bricks will last and support the bricks until the bricks themselves are burned away to such an extent as to be Worthless as a protection for the iron links. The flange A is provided with the apertures A10, adapted to receive a chainhook in lifting the cover from the furnacewalls.

By securing, asIhave shown and described, the individual members of the arch to the sustaining-beam the span of furnace-covers can be increased, thereby enlarging the capacity of the furnace, and the degree of curvature in an arch of a given span can be safely reduced, thereby forcing the current of flame and heated gases within the furnace down nearer the furnace contents which are being treated.

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

l. In a furnace-cover, a longitudinally and laterally arched brick-supporting beam made of a single bar of iron, substantially as described.

2. In a furnace-cover, the combinatiomwith a brick-supporting beam, of end clamps pivoted upon the beam, one at each end, a row of iire-bricks inclosed between the clamps, and adjustable connections for securing the oscillatory ends of the clamps upon the ends of the beam, as screw-bolts A8 and cross-bars A7, substantially as described.

3. In a furnace-cover, the combination,with a brick-supporting beam having end clamp,

yof a row of clamp-inclosed bricks and a brick-supporting link connecting an individual brick in the row with the beam, substantially as described. I

4. In a furnace-cover, the combination,with a brick-supporting beam having an end clamp, of a row of clamp-inclosed bricks having link-channels between contiguous bricks, and

ksupporting-links adapted to ft such channels secured to the iron beam, substantially as described.

5. In a furnace-cover, the combination,with a brick-supporting beam, of a row of bricks having key-channels, a brick-supporting link connecting a brick central of the row with Y the beam, and brick-supporting keys, substantially as described.

In testimony whereof' I have hereunto set my hand this 2d day of November, 1888.

WILLIAM SLEICI-IER, JR. Witnesses:

GEO. A. MosHER, W. I-I. HoLLIsTER.

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