US2069768A - Annealing cover - Google Patents

Description

Feb. 9, 1937. E. N. M ILLAN 2,069,768

ANNEALING COVER Filed Jan. 23, 1935 2 Sheets-Sheet 1 IN VENTOR WMMM ATTORNEYS Feb. 9, 1937.

E. N. MILLAN ANNEALING COVER Filed Jan. 23, 1935 2 Sheets-Sheet 2 l M i 111' WWW! v FIG t6 ATTORNEYS Patented Feb. 9, 1937 UNITED STATES PATENT OFFICE ANNEALING COVER Edward N. Millan, Middletown, Ohio, assignor' to The American Rolling Mill Company, Middletown, Ohio, a corporation of Ohio Application January 23, 1935, Serial No. 3,083 4 Claims. (01.263-49) My invention relates to annealing covers for covering packs of sheet metal or coils while they are being heat treated. The uses of annealing covers are well known, and particular description thereof is not necessary. The employment of 'annealing covers to retain particular atmospheres surrounding the pieces being heat treated is also well known. Because of their uses, annealing covers should be relatively rigid, but at the same time they should be as light as possible, both for convenience in handling and also for efficient heat transfer. This desirable lightness has not been attained in the cast annealing covers in current use. It has hitherto for the most part been considered necessary to provide a great bulk of metal to give satisfactory rigidity under high heats. Because of the rough usage and the great heat to which annealing covers are subjected, they must of course be very rugged and strong.

It is an object of my invention to provide an rigid and capable of forming a gas tight chamber, and very resistant to heat and wear, but which is at the same time light in weight.

It is a further object of my invention to provide annealing covers which are relatively inexpensive to construct but which when constructed have all of the above advantages.

These and other objects of my invention which will be set forth hereinafterfor will be apparent to one skilled in the art upon reading these speci fications, I accomplish by that certain construction and arrangement of parts of which I shall now describe a; preferred embodiment. Reference is made to' the drawings which form a part hereof, and in which:

Figure 1 isa side elevation, with a portion cut away, of my novel annealing cover.

Figure 2 is a horizontal section of my novel annealing cover taken on the section line 2--2 of Fi 1.

Figure 3 is a vertical section taken on the section line 3-3 of Figure 1.

Figure 4 is a vertical section taken on the section line 4--4 of Fig. 1.

Figure 5 is a horizontal section taken on the, Section line 55 of Fig. 1.

Figure 6 is a side elevation of a modified form of my annealing cover with an arched top.

- Figure 7 is an end elevation with part cut away of the modified form shown in Fig. 6.

Figure 8 is a section taken on the section line 8--8 of Fig. 6. c

Figure 9 is a section taken on the section line 9-9 of Fig. 6.

Figure 10 is a section taken on the section line |8lll of Fig. 6.

Broadly my invention comprises providing an annealing cover formed of relatively heavy corrugated metal sheets welded together to form the desired sealed chamber. The corrugated sheets which I prefer to use are of a weight of 8 gauge or greater, and are welded together with strengthening struts or bands where desired, to form a chamber, with sides, ends and a top, to fit over a pack or stack of sheets while they are being annealed.

Briefly in the practice of my invention; I provide a chamber or annealing cover having four sides I, 2, 3, and 4 formed of relatively heavy corrugated sheet metal with the corrugations 5 running diagonal with the sheets. These side pieces I, 2, 3, and 4 are so positioned as to form a hollow rectangle with the corrugations 5 vertical and with the ends of the sheets abutting.

These ends are preferably welded to each other so as to form an integral unit of the sides I, 2, 3,

and 4. A strengthening band 6 of metal may encircle the four sides I, 2, 3, and 4 at a line about half way up their height, and may be welded to the corrugations 5 as is indicated at l in Fig. 5.

one integral piece or may be a number of pieces welded or fastened together.

The corrugated pieces which I prefer to use are.

made of plate metal or the like, 8 gauge or heavier, corrugated with large corrugations between rolls in the direction of the shorter dimensions of the sheets, say with corrugations having a depth of 1% inches and a pitch of six inches, and where the corrugated pieces are to be curved, this is done progressively between dies. The figures given are of course exemplary and not limiting.

About the lower edges of the four sides I, 2, 3, and 4 I place four strips of angle iron 8, so positioned that the lower edges of the sides rest in the angle thereof with one leg 8a of the iron 8 positioned inside of the hollow rectangle and against the sides of the corrugations 5 and with the other leg 8b covering the ends 5a of the corrugations. These angle irons 8 are preferably welded to the side pieces I, 2, 3, and 4 at the points where either of the legs 80. or 8b contact the side pieces I, 2, 3, and 4. The ends of the four angle irons 8 may be beveled andwelded to each other in order to form an integral frame. The welding may be done in any convenient commercial way, as by electrlcity or flame.

Positioned on the four upper edges of the sides It is to be understood that this band 6 may be fled form of my novel annealing cover.

I, 2, 3, and 4 and welded thereto are four angle irons 9, with their legs 9a contacting the upper ends of the corrugations 5 and with their other legs 9b projecting upwardly from the leg 9a and on a line with the outside of the hollow rectangle formed by the four sides I, 2, 3, and 4. The four angle irons 9 are also preferably beveled and welded together at their ends in order to form an integral frame at the top edge of the cover.

Positioned within the frame formed by the angle irons 9 is a rectangular sheet of corrugated metal I 0, which is so formed as to rest on the legs 9a of the irons 9 and contact the legs 91; of the angle irons 9. This sheet In is welded to the irons 9 at all points of coincidence.

From the above description it is apparent that I have formed an integral, sealed chamber, rectangular in shape, of corrugated sheet metal. In order .to assist in the movement of this chamber I preferably provide a number of eyes or brackets II on the sides thereof to permit the insertion of the drag hook of a crane.

In Figs. 6, '7, 8, 9, and 10 I have shown a modimodification the top portion I2 is in the shape of an arch and is fastened to the side walls I and 3 by means of strips l3 of metal welded to the ends of the corrugations 5. These strips l3 are wider than the end of the corrugations 5 of the side walls and-a portion M of them is permitted to project over the side walls I and 3 and into the chamber. This portion 14 is bent over so as to contact the ends of the corrugations of the bent portion of the top l2, and at a right angle to the same. In other words if the top I2 is a portion of the segment of a circle, the bent portions l4 would define a radial line of the same circle.

Bending the portions [4 in this manner, greatly facilitates construction since it is possible to form the top I2 of a sheet of corrugated metal with vertical or square cut ends, and then to bend this top l2 into the predetermined are. This in turn will bring the ends of the corrugations 5a of the top H into registry with the surface of the bentover portion I 4, to facilitate welding. The two ends or side walls 2 and 4 are so configured at their top edges that they will contact the underside of the top l2 when it is in position. The bottom edge of the sides I, 2, 3, and 4 of this modifled form of my invention may be made even and smooth by welding strips l 5 of strap metal to the ends of the corrugations 5. The strips l5 are preferably of the same width as the corrugations 5 of the sides, and their ends may be beveled and welded together so as to form an integral frame welded to and covering the lower ends of the corrugations 5 of the side walls I 2, 3, and 4. In Fig. 10 is illustrated a preferred form or method of welding the side edges of the side walls I, 2, 3, and 4. This manner of abutment and welding may be used with my preferred form or with my modified form, although in the illustrations I In this have shown it in use with my modified form alone.

Hooks l8 may be welded to the ends or the sides of the cover shown in Fig. 6-as illustrated, for the purpose of handling, and serve the same purpose as the brackets ll shown in Fig. 1.

The different configurations and shapes of the cover shown in my drawings are not intended as a limitation, since numerous other forms may be used without departing from the spirit of my invention.

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

1. An annealing cover comprising four sides of corrugated 'sheet metal welded to each other at their ends, a strengthening metal band surrounding substantially the middle of said sheets on the outside and welded thereto, a top portion composed of corrugated sheet metal, and joining means between said top portion and said side portions, said side and top portions being welded to said joining means to form a sealed chamber.

2. An annealing cover comprising four sides of corrugated sheet metal welded to each other at their ends, a strengthening metal band surrounding substantially the middle of said sheets on the outside and welded thereto, a top portion composed of corrugated sheet metal, and joining means between said top portion and said side portions, said side and top portions being welded to said joining means to form a sealed chamber, said joining means comprising angle irons welded to the tops of said sides with their ends welded together at the corners, and the top portion rest- ,ing in the angles of the angle irons and welded thereto.

3. An annealing cover comprising four sides 01'- corrugated sheet metal welded to each other at their ends, a strengthening'metal band surrounding said sheets on-the outside and welded thereto, a top portion composed of corrugated sheet metal, and joining means between said top portion and said side portions, said side and top portions being welded to said joining means to form a sealed chamber, said joining means comprising angle irons welded to the tops of said sides with their ends welded together at the corners, and the top portion resting in the angles of the angle irons and welded thereto, and angle irons welded to the bottom edges of said side portions with the said side portions resting in the angle thereof.

4. An annealing cover comprising four sides of corrugated sheet metal welded to each other at their ends, a top portion composed of corrugated sheet metal, and joining means between said top portion and said side portions comprising angle irons welded to the tops of said sides with their ends welded together at the corners, the top portion resting in the angles of the angle irons and EDWARD N. MILLAN.

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