US1003959A - Annealing-box. - Google Patents

Description

J. P. ALLEN.

ANNEALING BOX. APPLIoATzoN FILED 11:11.14. 1911.

1,003,959. Patented sept. 19,1911.

" ful/111111111111450 INVEN'I'OR COLUMBIA PMNOCIAP 60.. WASHINGTON, D. L'-

WITNESBES UNITED STATES PATENT OFFICE.

JAMES I. ALLEN, OF PITTSBURG, PENNSYLVANIA.

ANNEALING-BOX.

To all whom it may concern:

Be it known that I, JAMES P. ALLEN, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Annealing-Boxes, of which the following is a specification.

This invention relates to annealing boxes, and particularly to all cast steel boxes.

The object is to improve cast annealing boxes to render them more durable than boxes as heretofore constructed, and particularly to prevent them from collapsing or sagging under the softening effect of the long continued severe heat to which subjected.

It is well known that the soakingV heat to which annealing boxes are subjected renders them liable to sag and collapse, due to the weight of the metal in the upper por tions thereof, and that the arched roof particularly is liable to sag and push the sides out of the vertical, causing the entire box to collapse.

The present invention is designed to overcome the defects as far as possible.

In the accompanying drawings Figure 1 is in part a side elevation and in part a. vertical longitudinal section of the box; Fig. 2 is a horizontal section on the line 2 2, Fig. 1 looking upwardly; and Fig. 3 is a transverse section on the line 3-3, Fig. 1.

The bottom of the box may be of any known or desired construction and is not shown. The top or box proper is formed as an integral casting of general rectangular form, having the end Walls 4, side walls 5 and arched roof 6 which springs from the side walls in a gradual curve. To support the roof and prevent the same from sagging it is reinforced internally by transverse trusses 8, which extend uninterruptedly from side to side and connect to the side walls at or near the point where the roof springs therefrom. These trusses each comprise a bottom chord 9 whose lower edge is preferably thickened or bulbous, as shown at 10, to prevent cracking, and struts 11 extending from the chord to the roof. The roof is further supported by a longitudinal truss 12 `extending uninterruptedly for the entire length of the box and conneeted to the end walls. This longitudinal truss likewise comprises a chord 14 thickened or bulbous at its lower edge, as at 15,

Specification of Letters Patent.

Application led lFebruary 14, 1911.

Patented Sept. 19, 1911.

Serial No. 608,589.

and struts 16 extending therefrom to the roof in line with the transverse trusses, and other struts 17 extending from the chord 14: to the roof between adjacent transverse trusses.

In the construction described and illustrated both the longitudinal truss and also the transverse trusses extend uninterruptedly for the full length and width of the box, without gaps' or brakes, and the struts 1G are common to both the longitudinal truss and the several transverse struts. As a consequence the roof is supported in all directions against sagging, it being impossible for it to sag between transverse trusses as is the case where no longitudinal truss is used or said longitudinal truss is inter-V rupted.

Externally the box is provided with longitudinal ribs 18 which extend uninterruptedly entirely around the box, and with vertical ribs 19 on the side walls and extending uninterruptedly from near the bottom of the box to a point well above where the roof springs from the side walls and above the line where the transverse trusses join the sides, as shown in Fig. 3. This design of external ribbing is however not claimed herein, and any other accepted design of external ribbing may be used in place of the design shown on the drawings.

The box either on the ends or sides is provided with suitable means, such as the projections 20, `for the attachment of a crane grapple, or other lifter.

The box described is a single integral casting and hence free from joints of all kinds which are liable to open under repeated contraction and expansion and admit air which would destroy the sheets therein. The entire box, both as to the walls and roof is so well reinforced that sagging is almost impossible, or in any event much delayed as compared with boxes as heretofore constructed. As a consequence the life thereof is very much increased.

What I claim is:

1. An annealing box formed as an integral casting having side and end walls and an arched roof, and a longitudinal truss member connecting the end walls and extending uninterruptedly from end to end underneath the roof and supporting the same.

2. An annealing box formed as an integral casting having side and end Walls and an arched roof, and a longitudinal truss member connecting the end Walls and comprising a chord joined to the end Walls and extending uninterruptedly for the length of the boX, andv struts extending from said chord to the roof.

3. An annealing box formed as an integral casting having side and end Walls and an arched roof, and truss members arranged both transversely and longitudinally underneath the roof and extending uninterruptedly across and lengthwise of the boX.

4L. An annealing boX formed as an integral casting having side and end Walls and an arched roof, and transverse and longitudinal trusses for the roof each comprising an uninterrupted chord and struts extending therefrom to the roof.

5. An annealing box formed asV an integral casting having side and end Walls and an arched roof, and transverse and longitudinal trusses for the roof each comprising an uninterrupted chord and struts extending therefromto the roof, said trusses at the pointof intersection having common struts.

In testimony whereof, I have hereunto set my hand.

JAMES P. ALLEN.

Witnesses F. W. WINTER, MARY E. CAHooN.

Copies of this patent may beobtaned for five cents each` by addressing the Commissioner of Patents,

Washington, D. C.

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