US2471275A - Furnace door - Google Patents

Description

24, 1 4, H. R. LOXTERMAN 2,471,275

FURNACE DOOR Filed June 28, 1945 INVENTOIL Henry R Loxferman Patented May 24, 1949 FURNACE DOOR Henry R. Loxterman, Chicago, Ill., assignor to Blaw-Knox Company, Pittsburgh, Pa., a, 0.01- poration of New Jersey Application June 28, 1945., Serial No. 602,121

2 Claims.

This invention relates to a furnace door and, in particular, to a Water-cooled door comprising generally a double-walled panel and a refractory lining on the inner face thereof.

One form of water-cooled furnace door which has performed satisfactorily in service has its double-walled panel composed of a plurality of sub-panels or box sections disposed side-by-side in spaced relation, and alinin of refractory brick mortised into the slots or spaces between adjacent sub-panels. The lining of such doors, however, takes considerable time and skill because of the mortise fit between the bricks and the panel and without this fit, the life of the door is materially reduced.

I have invented an improved door including a plurality of spaced box sections or sub-panels disposed side-by-side and so constructed as to accommodate a brick arch on the inner side. The outer wall of the door is preferably flat while the inner wall lies substantially in the surface of a cylinder having its axis vertical and on the inner side of a door. A lining of brick or other refractory material may thus be easily laid up on the inside of the door in the form of an arch so as to 'be self-retaining without the necessity of mortising the lining into the slots between adjacent sub-panels or box sections.

For a complete understanding of the invention, reference is made to the accompanying drawings illustrating a preferred embodiment, and to the following detailed description thereof. In the drawings,

Figure l is an elevation of my improved door;

Figure 2 is a vertical section therethrough along the plane of line II-II of Figure l, and

Figure 3 is a view partly in plan and partly in horizontal section along the plane of line IIIIII of Figure 1.

Referring in detail to the drawings, the door of my invention indicated generally at In includes a hollow panel I I having an inwardly projecting flange l2 extending therearound and in communication therewith. The panel H is composed of sub-panels or box sections l3 and l3a. These sub-panels are disposed side-by-side in spaced relation, extend between the top flange l4 and the bottom flange l5 and substantially fill the space between the side flanges 56, except for elongated vertical openings or slots ll between adjacent sub-panels. It will be noted that all the sub-panels communicate with the top and bottom flanges and that the panels |3a also open into the side flanges Hi.

The outer faces of the sub-panels are substantially flat and coplanar. The inner faces, how ever, lie substantially in the surface of a vertical cylinder having its axis on the inner side of the door. This construction provides a concave recess on the inner side of the door adapted to accommodate refractory material I! laid up in the form of an arch against the inner walls of the sub-panels to serve as a lining for the door. The lining may conveniently be composed of firebrick laid up with suitable mortar.

As shown in Figure 3, the lining does not enter the slots ll. It is held in place by its arch shape. The lining may be easily and quickly applied since it is composed principally of standard bricks with an occasional arch brick to introduce the necessary curvature.

The top flange I4 is provided with the usual inlet l8 and outlet l 9 for cooling water while the bottom flange has wash-out openings [9 therein provided with screw plugs 20. A peep hole 2| is formed in the central sub-panel l3 near the bottom flange [5.

It will be apparent from the foregoin description that the invention provides a door which has several advantages over doors of similar general type as heretofore constructed in that the lining is self-retained without the necessity of a mortise fit into the slots between the sub-panels which requires a substantial amount of time and skill. The lining, furthermore, may be applied quickly and easily with a minimum of cutting bricks to fit.

Although I have illustrated and described but a preferred embodiment of the invention, it will i be recognized that changes in the details of the construction disclosed may be made Without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. A furnace door, comprising in combination, a pair of spaced hollow side flanges, spaced hollow top and bottom flanges extending between said side flanges, all of said flanges having inner faces, a plurality of spaced hollow panels disposed sideby-side and extending between said top and bottom flanges, the outer faces of said panels lying substantially in a common surface, the inner faces of said panels lying substantially in the surface of a vertical cylinder whose axis is adjacent the inner side of said door and is substantially equidistant from said side flanges, said inner faces of said panels being set back from said inner faces of said flanges and thereby defining with said flanges a concave space, a refractory brick lining of substantially uniform thickness disposed in said space, said lining having its outer surface coinciding substantially entirely with said surface of said vertical cylinder, whereby a refractory lining of uniform thickness may be quickly and readily made of standard brick and be subject to continuous visible overall observation.

2. A furnace door, comprising in combination, a pair of spaced hollow side flanges, said side flanges having opposed faces converging inwardly, spaced hollow top and bottom flanges extending between said side flanges, all of said flanges having substantially vertical inner faces, a plurality of spaced hollow panels disposed side-by-side and extending between said top and bottom flanges, the outer faces of said panels being substantially flat and coplanar, the inner faces of said panels lying substantially in the surface of a vertical cylinder whose axis is adjacent the inner side of said door and is substantially equidistant from said side flanges, said inner faces of said panels being set back from said inner faces of said REFERENCES CITED following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,211,884 Schmidt Jan. 9, 1917 2,259,900 Loxterman Oct. 21, 1941

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