US1611909A - Annealing box - Google Patents

Description

G. A. HASSEL ANNEALING BOX Dec. 28 ,1926.

Filed June 17, 1925 WITNE SSES Patented Dec. 28, 1926.

UNITED STATES PATENT OFFICE.

GUSTAV A. HASSEL, OF MCKEESPORT, PENNSYLVANIA, ASSIGNOB. TO PITTSBURGH STEEL FOUNDRY CORPORATION, OF GLASSPORT, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Application filed June 17, 1926.

The invention relates to boxes :tor sealing sheet or other metal against the ingress of oxygen While being heated, and has particularly to ldo with annealing boxes ot' the type which consists of a base having an upturned peripheral iange, and a hood having its lower edge resting upon the base and torming with the 4flange ot the base a groove for the reception of luting or sealing material.

In the use of these annealing boxes, considerable difficulty has been encountered by reason of the warpage of the sides oi' the hoods, particularly at their lower edges lVhen this warpage takes place during an annealing operation, as it frequently does, the edges of the hood either move outwardly or inwardly of their normal positions. This breaks the seal and permits the tlow` of an oxidizing atmosphere into the hood.

'lhe object of this invention is to provide an annealing box of the type explained with simple and effective means for preventing lateral movements of the lower edge of thev hood, the means being such as will not become impaired by high heat to which such boxes are normally subjected in service.

Tn accordance with the present invention means are provided for securely locking the hood to the base oi an annealing box in the region where the warping or distortion is most pronounced, that is, between the corner or end portions of the box, or at such intermediate portions as may be desired. To trmly secure the hood and base a block of suitable shape to engage complementary shaped portions of the hase and hood is se-y cured as by a wedge to clamp the hood to the base member. By means ofthe clamping blocks the hood becomes firmly seatedv on the base, and the sides of the hood. which are ordinarily free to become distorted, are restrained against movement.

'lhe invention is illustrated in the accompanying drawings of which Fig. l is a view partially in side elevation and partially in section of an annealing box; Fig. 2 a cross sectional view thereof taken along the line IL-H, Fig. 1; and Fig. 3 a top plan view of the portion of the annealing box in which the wedge-block is secured.

Referring to the several :tigures of the drawing, the structure therein illustrated comprises a base 1 provided with grooved ANNEALING B0X.

Serial No. 116,580.

upon the upper face ot base 1 within the rim or flange portion 4 and within the vertically extending lugs 5. The hood is provided with arms or lugs 7 for receiving hooks for hoistingby means of which it is lifted and lowered from and onto base 1.

As shown in Fig. 2, base 1 and hood 6 are provided with mortised grooves 8 for receivmg .a dove-tailed block 9 having a central opening l() for receiving a wedge 11. The dimensions of block 9 are such as to tit between the projecting lugs 5,'the latter being provided with openings for receiving the wedge member 1l in alignment With the central 'opening 10 of the block. The wedge 11 is driven through the openings of the lugs 5 and the central opening of the clamping block 9, as shown in Fig. l, to drivethe block against the mortised seating grooves 8 of the base and hood to firmly clamp the latter to the former for the purpose hereinbefore stated. y i

Although but a single pair of blocks are shown in the drawing disposed midway between the ends of the annealing box, it is evident that two or more such clamps may be provided on each side of the annealing box, and also at the respective ends thereof in accordance with the clamping action it is desired to obtain. for a given sized annealing box. It is also evident that various forms of clam ing blocks may be used in place of those il ustrated, it being characteristic of the blocks and their cooperating elements that they are so formed that their usefulness doesl not become impaired by being periodically subjected to high temperatures.

By using the clamping means herein provided, the sides of an annealing box hood are so held against distortion that the seal at their edges does not become broken during an annealing operation.

Although this invention is herein illustrated in its preferred embodiment it will be obvious to those skilled in the art that various modifications may be made in the details of constrrction and in the arrangement of the several cooperating parts Without departing from the principles herein set forth.

I claim:

1. In an annealing box the combination of a base, a hood, and means for securely locking said base and hood, said means com rising a plurality of blocks adapted for loc Iing engagement with said lhase and hood, and Wedges extended through said blocks and through openings provided in said hase.

2. In an annealing box ythe combination of a base having a plurality of mortised oilset portions, a hood adapted to seat thereon, said hood having mortised portions corresponding to and registering with the mortised-portions of l:said base, blocks shaped complementary to the mortised portions of said base and hood, and means :tor interlocking said blocks, hase and hood.

3l In an annealing box the combination of a base having a plurality of mortised offset portions, a hood adapted to seat thereon, said hood having mortised portions correspond'- ing to and registering with the morti'sed portions of said base, blocks shaped complementary to the mortised portions of said 'base and hood, and Wedges extending 'through said blocks into openings rovided in said base for interlocking sai base and hood.

4. In an annealing box the combination of a base having spaced-apart vertically extending lugs, a hood adapted to seat on said base intermediate said lugs, clamping blocks disposed between said lugs and adapted to cooperatively engage said base and hood, and Wedges extending through vopenings in said blocks and the lugs of said base to interlock the said base and hood. i

In testimony whereof, I sign my name.

onsrnv A; ssrn blocks,

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