US1433452A - Furnace - Google Patents

Description

H. R.'G'RIFFITHS.

FURNACE. APPLICATION FILED AIIG.5, 1920.

2I I92 2 SHEETS-SHEET lfatenterltlct.. 241, 19122.

HERBERT It. GRIFFITHS, OIF HOMESTEAD, PENNSYLVANIA.

FRNACE.

application filed August 5, 1920. serial No. 401,325.

To all w hom t may concern:

Be it known that l, HERBERT l; Guir- `i iriis, a citizen of the United States, resid-` ing at Homestead, in the county of Allegheny and State of Pennsylvania, have invented certain new and 'useful l1nprovements in Furnaces, of which the following is a specification- This invention relates to furnaces,` de signed primarily for the production of steel, but it is to be understood that the furnace canbe employed for any purposes wherein -it is found applicable, and has for its object to provide a furnace, in a manner as herein after set forth, with a pair of down-take structures, one at each end thereof, and each constructed with a collection chamber having the walls thereof smooth and uninterruptedthroughout and further squared off at the lower ends or at the bottom of the chamber, whereby any retardation of the cinder "and slag during the down travel thereof through said chamber is prevented, and further to prevent any accumulation of the cinder and slag within the collection chamber, and each of said structures having associated therewith a removable hopper providing` a removable bottom for the collection chamber and employed as a `pocket for the collection of cinder and slag during the process of combustion, the hopper being so setup that when occasion requires it can be removed and dumped, under such conditions setting upa convenient method for removing the collected cinder and slag.

Further objects of the invention are to provide a furnace for the purpose set forth, in a manner as hereinafter referred to, which is simple in its construction and arrangement, strong, durable, efficient and convenient in its use, readily set up, and comparatively inexpensive to build.

With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter set forth and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications, can be resorted to which come within the scope of the claim hereunto appended.

ln the drawings wherein like reference Figure 2.

`ence characters denote corresponding parts throughout the several viewsz Figure 1 is a front elevation of a furnace in accordance with this invention.

Figure 2 is a longitudinal sectional view thereof.

Figurel Sis a section on 1ine`IlI111 Figure 4L is a section on line 11I-1V Figure 3.

A furnace in accordance with this invention includes a central structure and a pair `of end structures, the former comprises a base foundation 1, depressed to provide a-` hearth 2, whichy has a lining 3, of refractory material, and the said central structure further includes a roof 4c, a front wall 5 and a rear wall 6. The front wall 5 has entrance openings or doors 7, so that the material or ore to be acted on, can be supplied to the hearth 2. The rear wall 6 is formed with,` a discharge port or passage 8. structure forms a heating chamber 9, having each end open, as at 10.

Each of the end structures is what may be termed a down-take and as each is similarin construction, but one will be described, as

The central the description of one will apply to the other.

The down-takes communicate by fines 25 with the checkerwork A.

Each down-take comprises a roof 11, an end wall 12, a rear wall 13, a front wall 14, an intermediate partition 15, and an inner end wall 16 which is of less height than the end wall 12.

Each down-take further comprises an nlet chamber `17 and collection chamber 18. The chamber 17 is formedby the upper portion of the outer end wall 12, the roof 11, front and rear walls 13, 14, and the partition 15, the latter forms the bottom of the inlet chamber 17. The open end 10 of the chamn ber 9 opens into the chamber 17.

The collection chamber 18, is formed by the partition 15, front and rear walls 13, 14 and end walls 12, 16. The wall 16 has the rear portion B thereof tapered towards the checke1work A. One wall of a flue 25 forms a continuation of the taper of the tapering portion B of the wall 16. The taperw ing of the wall 16 and the wall of the fiue 25 allows for greater draft to the checkerm work it.. n

rl`hc partition l5 `terms' the roo t o'l" the chaniber 18, and is provided with an opening 19 whereby communication is established between the chambers 17 and 18.y

The bottom of the chamber 18. is formed by what may be termed a removable collecting hopper' 20, which is provided with a lining of refractory material 21. The hopper 20, which constitutes a pocket, is detachably supported on a shii'table truck 22, which is mounted to travel on a track formed by the rails 23, extended to a position within the down-take below the chamber 18. The rear wall. 1il. is cutaway, as at 24C, to provide an opening to allow for the; shitting` of the truck into andi out ot' the down-take.

Extending into each chamber 17, in prox4 imity to the open end 10, of the chamber 9,

is a pair of oppositely disposed; burners lor gas. The burners for one chamber 17 are indicated at 26 andv for the other chamber at 27. When the burners 2G are used the open end 10 in proximity thereto forms an inlet andthe other open end 1() of the chamber 9 formsan outlet, and the same arrangement relative to the open ends 10, is had when the otherl burners are used.v But one pair of burners is employed at one time.

Associated with each of the trucks 22, is a hydraulic or lcompressed air cylinder 28, havingy a piston, not shown, and thelatter is formed withl a piston rod 29, which is connectedv with the truck 22, for the purpose of shifting the truck into and out o1' the downtake when desired.. Vhen shifted outwardly the hopper 2O can be removed from the truck, by any suitable elevating` mechanism, and then dumped. Eyes 30 are provided on the hopper so the elevating` mechanism can be detachablyconnected therewith. To provide for the sealing of the bottom of each of the chambers 18, the walls. 12, 14 and 16 are squared off or under cut at their lower ends to provide shoulders 31, against which the top edgesy of the sides and inner end wall olfA the hopper abuis. The wall 13% is also squared oli and cut away to l'oriu a bevelled shoulder 32, which extends above the shoulders 31, and against the shoulder 32 abuts the extended upper end of the 'front end wall of the hopper 20. The front end wall of the hopper is o1 greater height than the side walls and' inner end wall. See Eigure 3.

The walls of the chambers 18 are smooth throughout, sothat the fall oi the cinder and slag will not be interfered with and no accureadily replaced by a new one without discarding the truck. The hopper is so constructed as to form a complete closure for the bottom of the chamber 18.

What I claim is In combination a furnace havingy a hearth and a downward passage comlminicatinfbr with the hearth, said downward passage being` rectangular in plan and having three of its walls undercut and the other .wall bevelled, the bevel extending above the undercuts and said undercut walls providingT tor the passage ofv a removable hopper below the passage, said passage adapted to communicate with the checker work ot the furnace and having one of itswalls tapered inwardly towards the checker work providing the passage of greater width at the checker work whereby the size of the latter is increased.

In testimony whereof I atlix my signature.

HERBERT It. GRIFFITIIS.

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