US1068260A - Annealing-box. - Google Patents

Description

F. E. MEST.

ANNBALING B0X.

IPLIUATION FILED MAY l, 1911. l O68 260, Patnted July 22, 1913. 2 SHEETS-SHEET l.

INVENTOR @y WM F. E. MESTA.

ANNBALING BOX.

APPLIGATION FILED MAY 1, 1911. 1,068,260.` Patented July 22, 1913.

2 SHEETS-SHEET 2.

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WITNESSES via FREDERICK MESTA, l? PITTSBURGH, PENNSYLVANIA.

NNEALINGt-BOK.

Specification of Letters Patent.

Patented Jnly 22, 1913.

Application filed Hay l, 1911. Serial No. 624x419.

, of annealing box embodying my invention partly brokenjaway; Fig. 2 is a section on the line ll-ll of Fig. l; Fig. 3 1s a side view showing a modilication; andFig. l

y is a cross section showing another modification.

My invention has relation to annealing y boxes,'and is designed to provide an amicaling box which will be cheaper in construetion and more durable in service than the annealing boxes heretofore employed.

Prior to my invention, annealing boxes have been constructed either as integral castings or have been built up of metal plates or sections united in various ways. Owing to the severe heat to which the boxes are subjected in "use, they rapidly burn out and also tend to warp and crack. Numerous expedients have been resorted to in the construction of such boxes for overcoming these defects and increasing their durability.

ln accordance with my invention, l construct the box'wholly of a heat-resisting material of initially plastic character capable of beingr molded into the desired form and suitably reinforced by metal, if desired.

ln the embodiment of my invention which l have shown in the aceompanying drawings, the box consists of the body 2 of plastic material molded to the proper thickness and shape over a metallic reinforcement 3.

lln this particular form of my invention, the

metallic reinforcement- 3 consists of sheets of expanded metal suitably connected at the corners with a stift'ening and reinforcing rod 4t, near its lower edge, the plastic material being molded on both sides of the reinforce through the interstices or openings thereof.

Preferably all angles of the box are,

rounded, so as to obviate `sharp corners lilrely to be injured, and increasing the sti'- ness and durability. rllhe plastic body may be molded continuously and without seams.

Fi 3 shows a modified form of the inventien in which the box is provided with a plurality of exterior reinforcing ribs 5. rlhese ribs preferably extend both vertically and longitudinally of the box, but may be arranged in various ways.

- Fig. l shows a modification in which the exterior of the box is provided with a corrugated. or ribbed surface 6, the purpose of which is to increase the area of the heatabsorbing Surface of the body. ln this iig-ure, l have shown the lower edge' of the box as resting in a metallic frame 7 of channel form, 'and which carrles the eyes 8 for the lifting hooks. rlhis channel seats in thev usual box bottom r9.

ln molding the box, pressure may or may not be employed in forcing the material into the molds. By the use of hydraulic pressure, a very dense structure may be obtained. Instead of molding the box as one continuous piece, it will be -obvious that it may be molded in slabs or sections and cemented together at the joints.

' may be of any desired or suitable character.

lf metal reinforcement is not employed, the entire box can be formed without joints 1 from theplastic material in a suitable mold;

Annealing boxes can be constructed in accordance with my invention at a costgreatly below that of the ordinary metal boxes and of greatly lincreased durability, the boxes being much lighter and'easier to handle than are the metal boxes commonly employed.

The plastic heat-resisting material which l employ may be of `varylng compositions. A suitable composition for the purpose is as follows; silica 71.7 parts (by bulk); alumina l1 arts; oxid magnesia 11.6 parts; alkalis (so iu'm and potassium) 2.2 parts; silicon carbid 3.5 parts. These ingredients are thoroughly mixed into a plastic mass of suitable consistency for molding.

As the plastic material may have an i oxidizing action upon the metal of the reinforce, the latter is preferably galvanized or provided with some other sultable protective coating.

ll claim:

l. As a new article of manufacture, an annealing box composed of a molded body of heatresisting cementitious material containing a metal lreinforce, substantially as described.

2. An annealing box comprising a metal reinforce and a covering or coating of cementtious heat-resisting material in which the reinforce is embedded, substantially as described.

3. An annealing box comprising a metallic reinforce and a body molded upon and embedding the reinforce and composed of an initiallyplastic heat-resisting ma-` ferial, substantially as described.

4. An annealing box comprising a metallic reinforce'and a body molded upon and embedding the reinforce and composed of an initially plastic heat-resisting materialv Whose main ingredient is silica, substantially as described.

5. An annealing boxY having continuous top, side and end Walls of a molded fireresisting cementitious material and containing `a metal reinforce, substantially as described.

6. An annealing box having continuous top, side and end Walls of a molded lireresisting cementitious material and containing a metallic reinforce, said box having its corners or angles rounded, substantially asY described.

7. An annealing box having continuous top, side and' end Walls of a molded reresisting cementitious material and containing a metal reinforce, the lower portion of the box having embedded in its walls a' metallic reinforce of substantial cross section, substantially as described.v

8. An annealing box comprising a molded body of heat-resisting material containing a metal reinforce, the latter having a coating to protect it from the action of said material, substantially as described.

In testimony whereof, I have hereunto set my hand.

FRED. E. MESTA.

Vitnesses L. IvnRsEN, J, R. BERG.

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