US1118358A - Furnace-door frame. - Google Patents

Description

L. L. KNOX. FURNACE noon FRAME.

APPLICATION FILED JAN-10! 1914.

Patented Nov. 24, 1914.

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-25 INVENTOR WAN Gum's L. L. KNOX.

FURNACE DOOR FRAME.

APPLICATION IILBD JAN.10. 1914.

Patented Nov. 24, 1914.

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INVENTOR UNITED sTATEs ParENT OFFICE.

LUTHER L. KNOX, OF AVALON, PENNSYLVANIA, ASSIGNOR TO KNOX PRESSED & WELDED. STEEL COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

FURNACE-DOOR FRAME.

Specification of Letters Patent.

Patented Nov. 24, 1914.

Application filed January 10,1914. Serial No. 811,390.

new and useful Improvement in Furnace Door Frames, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, forming part of this" specification, 1n

7 which- Figure 1 is a front elevation partly broken away of one form of furnace door embodying my invention; Figs. 2, 3 and 4 through one of the depending leg portions of the structure; Fig. 6 is a section on the 0 line VIVI of Fig. 5, and Fig. 7 is aperspective view of the bottom connecting or tie member of the structure.

My invention has relation to furnace door frames, and more particularly to' hollow water-cooled frames constructed from sheet metal.

The object of my invention is to provide 21h frame of simple, eiiicient and durable construction.

In accordance with my invention, the upper or lintel portion of the frame 1s formed of a front plate 2, and a back plate 3. The front plate 2 has its upper edge portion bent horizontally rearward, as shown at 4, to form the top wall of the structure, be-

ing welded at 5 to, the upper free edgeof edge portion bent horizontally outward, asv

shown at 8, to form the bottom wall of the structure, and is welded at 9 to the lower flee edge of-the front plate 2. .This lower wall 8 may be either straight or arched. In the drawing, I have shown it as arched. The back plate 3 also has its edge portions 10 bent forwardly at substantially right angles to form the side walls of the structure, these side walls being welded at 11 to the free vertical edges of the I front plate 2. 7

Each leg portion is formed by a downward extension 12 of the back leg 3 and by a downward extension 13 of the front leg The downward exten ions 12 arebent into substantially U-form with the U facing outwardly, as shown in Figs. 4. and 5, while the downward extension 13 fits between the sate for this offset, the two legs of the U.

on the extension 12 are of unequal lengths.

The numeral 17 designates a hollow tie member which connects the legs at their lower ends and which also acts to form the closed bottoms of the legs. This tie member,

is preferably formed by a single piece of sheet metal shaped and bent in a manner substantially as indicated at Fig. 7, to form the hollow rectangular central portion having open ends, and with the end projections 18 of the bottom member thereof. The free edges of the blank are welded on the line 18, and the extensions 18 are welded to the bottom edges of the legs. The inner walls of these legs are shorter than the outer walls and are welded to the top wall of the portion 17. This bottom member forms a substantial tic connection between the lower ends of the legs which effectively prevents their warping or twisting in use. V Any suitable means may be employed for effecting a water circulation throughout the interior of the structure. In the drawing, I have shown, a water supply pipe 19, extending vertically downward through one -sideofthe lintel portion and thence into the atthe corresponding side, the lower end shown .a. 20,,within one end portion! of the tie member 17. shown as having a perforated branch 21, extending within the lowerportion of the lintel over the bottom arch thereof. The heating water rises to anoutlet connection 22 at the top of the strlicture at the opposite side to that where the supply pipe 19 enters.

23 indicates a suitable blow-out plug at the lower end portion of one of the legs, and 24. designates bracing connections, in the form of stay bolts, for the front and back plates. 1 11,.

'My invention provides a strong, efficient and durable water-cooled door frame structure which can be readily constructed from The pipe 19 is'alsothis pipe being bent horizontally, as

sheet metal. The. blanks of which the structure is formed can be readily shaped and united by Welding, thereby making a practically integral structure 'of minimum weight. A continuous water circulation may be maintained throughout the structure, thereby rendering it very durable. 7

I do not wish to limit myself to the exact details of construction and arrangement of the parts, as shown and \described, for it is obvious that various changes may be made therein, without departingfrom the spirit and. scope of my invention as defined in the appended claims;

I claim:

1.' A hollow waterrcooled furnace door frame, comprisingan upper or lintel portion formed of two sheet metal plates, one of said plates having its edge portions bent to form the side walls of the structure, and the other plate having its free edges united to said side walls and the two plates having downward extensions united to form the hollow leg portions' ofthe' structure, substantially as described.

2. A furnace door frame, comprising an upper or lintel portion formed of two sheet metal plates, one of which has its edge portions bent at substantially. right angles to form the side walls ofthe structure, the other plate having its free vertical edges united to said side walls, one of said plates having its upper edge portion bent horizon tally and secured to the upper edge of the other plate to form, the top wall of the structure, and the second plate having its lower edge portion bent horizontally and secured to the lower edge of the first plate to form the bottom wall ofthe structure, substantially as described.

3. A furnace door frame, comprising an upper or lintel portion formed of two sheet metal plates, one f which has its edge portions bent at suistantially right angles to form the side walls of the structure, the other plate having its free vertical edges 7 united to said sidewalls, one of said plates having its upper edge portion bent horizons tally and secured tothe upper edge of the other plate to form the top wall of the structo the lower edge of the first'plate to form the bottom wall of the structure, and saidpla'tes having downward extensions united ture, and the second plate having its lower edge portion bent horizontally and secured to form the hollow leg ortions of the structure, substantially as escribed.

4:. A furnace door frame, comprisingan bottom member uniting said leg portions,

'said bottom member having end extens1ons secured to and forming closures for the lower, ends of the legs, substantially as described.

6. A hollow furnace door frame, formed of sheet metal and having depending hollow legs, said legs being un1ted at their lower ends-by a hollow transverse tie member having' an interior water-circulating space which communicates with the interior spaceof the legs and having its bottom wall extended to form bottom closures for the legs,

substantially as described.

7. A hollow sheet metal furnace door side of the door opening, and a transverse tie member connecting the lower portions of saidlegs' at the bottom of said openm'g, sa1d of the legs, and having end extensions which aresecured to the open lower end portions of said legs to form bottom closures there-' for, substantially as described. In testimony whereoifll have hereunto set my hand.

'- l Vitnesses:

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frame having depending hollow legs at each:

tie member having a. water circulating space which communicates wlth the lnterior spaces LUTHER 1L. ox.

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