US807275A - Annealing-box. - Google Patents

Description

PATENTED DEC. 12, 1905..

' M. JOHNSON.

ANNEALING BOX.

APPLICATION FILED JUNE 22.1905.

INVENTOR ATTORN EY MALOOM JOHNSON, OF ALLEGHENY, PENNSYLVANIA.

ANNEALlNG-BOX.

Specification of Letters Patent.

Patented Dec. 12, 1905'.

Application filed June 22, 1905. Serial No. 266,474.

To all whom it may concern.-

Be it known that I, MALGOM JOHNSON, a citizen of the United States,residing at Allegheny, in the county of Allegheny and State of Penn sylvania, have invented new and useful Improvements in Annealing-Boxes, of which the following is a specification.

The object of my invention is to provide a new and improved annealing-box; and to this end the present invention particularly relates to a new and improved wrought-iron annealing-box; and it consists of an annealing-box in the construction and in the combination of parts, all as fully hereinafter described and claimed.

In the accompanying drawings, which illustrate an application of my invention, Figure l is a perspective view of a box constructed in accordance with myinvention; Fig. 2, a vertical sectional view; Fig. 3, a part-plan and a part-sectional view, and Fig. 4 an enlarged detail view.

Referring to the drawings, the body of the annealing-box is preferably formed from a single piece of wrought metal and comprises two side portions 2 2 and two end portions 3 3. One of the side portions 3 is formed with an overlapping part 4, which part is designed to extend over one of the end portions 3 and to be welded thereto. This construction, it will be noted, calls for a simple and efficient body portion capable of resisting warping or bending when subjected to intense heat. The box is open at the bottom and closed at its top by a cap or cover 5. Cover 5 preferably consists of a single piece of metal formed with a depending flange 6. This cap or cover, as illustrated, has a slightly convex outer surface; but it is sometimes made with a flat surface. The depending flange 6 when the cover is fitted to the body overlaps the upper edges of said body. This flange is welded to the sides and ends of the body portion.

A characteristic and important feature of the present invention is the strip or, as shown, the strips 7 7. These strips extend entirely around the box at its upper end and, as clearly shown by the drawings, project a slight distance above the upper edges of the box and the flange of the cover. These strips 7 7 in addition to greatly strengthening the box provide a space for sand or other material. The strips are fastened to the body of the box by bolts 8 8 and are disposed over the depending flange of the cover. The bolts 8 8 are screw-threaded, as shown by the drawings, and are adapted to engage with screw-threads formed in holes in the body of the box, through which the bolts enter when the protecting and strengthening strips 7 7 are applied.

In the manufacture of annealing-boxes of the class to which my invention relatesthat is to say, in which the top or cover is welded to the body portionit is well known that the heating and hammering necessary to accomplish the welding as well as the refining due to the heat necessaryin the welding process reduce the thickness of the box, and thus weaken it along the line of weld and near the upper edges of the box. In the use of these boxes the intense heat to which they are subby burning through or by the effect of the unequal expansion and contraction at the reduced portion along the line of weld, thereby permitting air to enter the box, rendering the same worthless. The primary object of the present invention is to protect this portion of the box and to lengthen the life ofthe same. .This I accomplish by means of the strips 7 7, secured to the box over the flange of the cover byscrew-bolts 8 8. In time, of course, the protecting-strips are destroyed. When these strips are rendered useless, they are knocked off the box. In this connection I desire to particularly call attention to the fact that the protecting strip or strips are attached to the box by screw-bolts and not by rivets or other means. With the employment of bolts which screw into the body of the box the protecting strip or strips and the outer portion of the screw-bolts may be broken away from the body portion, leaving a part of each bolt in the body and the annealingbox in as good a condition at the upper part thereof as an annealing-box not having my protecting-strip applied thereto in the first instance. Rivets could not be employed for securing the protecting-strip to the body, because they would fall out of the holes in the body upon the removal of the strip or strips.

What I claim is f 1. An annealing-box having a body portion, and a top portion welded to the body portion and means for protecting the reduced welded portion of the box, consisting of a separate strip of metal disposed over said weld portion and secured to the body by securing means IIO which have a tight fit in the body portionand are adapted to form permanent closing-plugs in the body portion after the removal of the said strip, substantially as described.

' 2. An annealing-box having a body portion, and a top portion welded to the body portion and means for protecting the reduced welded portion of the box, consisting of a separate strip of metal disposed over said-weld portion and secured to the body by securing means which have a tight fit in the body portion and are adapted to form permanent closing-plugs in the body portion after the removal of the said strip, said securing means projecting loosely through said strip, substantially as described.

3. An annealing-box having the body portion formed of a single piece of wrought metal with the ends of the piece welded together at one corner of the body, a cover for the body formed with a depending flange and welded to the body, protecting-strips extending around the upper end of the body and disposed over the'welded portion and flange of the cover, said strips projecting above the body and the flange of the cover, and a series of screw-threaded bolts for fastening the strips to the body, said bolts passing freely through the strip, and having their threaded portions engaging the body, substantially as described. lt. An annealing-box havingits body formed of a single piece of metal, a cover for the body welded thereto, a protecting-strip of metal extending around the upper end of the body and over the welded portion, and screwthreaded bolts, passing through the strip and having their threaded portions engaging the body, substantially as described.

5. An annealing-box consisting of a welded body portion, a top welded to the body portion, and means for protecting the weld-line of the top and body consisting of astrip of metal disposed over the weld-line and secured to the body by screw-threaded bolts having their threaded portions engaging the body, whereby they are adapted to form tight, closingplugs in the body when the strip is broken away or removed,'substantially as described.

In testimony whereof I aflix'my signature in presence of two subscribing witnesses.

MALCOM JOHNSON.

Witnesses:

MARGARET HUGHES, W. G. DOOLITTLE.

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