US 1029321 A
Description (OCR text may contain errors)
SHEET METAL BOX.
APPLICATION FILED JUNE 25, 1910 RENEWED NOV. 24, 1911.
1,029,321 Patented June 11, 1912.
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SHEET METAL BOX.
APPLICATION FILED JUNE 25, 1910. RENEWED nov. 24, 1911.
1,029,321, I Patented June 11,1912.
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JACOB SCHA FFER, OF NEW YORK, N. Y.
Application filed June 25. 1910. Serial No. 568,777.
T 0 all whom it may concern:
Be it known that I, .IAcoB Scnxrrua. a citizen of the I nited States, residing at the city of New York. in the borough of Brooklyn and State of New York, have invented certain new and useful Improvements in Sheet-Metal Boxes, of which the following is a full, clear, and exact description.
This invention relates to sheet metal boxes and particularly to that class of boxes having curved or arc-shaped covers which m(We or slide in guides formed in the walls or frame of the box.
The object of the invention is to provide a simple form of guide for the cover which can be economically constructed, is eflicient in operation, and will not mar the appearance of the box.
The invention consists in the details of construction which will be hereinafter particularly described.
In the accompanying drawings: Figure 1 is a perspective view of a sheet metal box constructed according to my invention. Fig. 2 is a transverse section of the same. Fig. 3 is a longitudinal vertical section through one end of the box; and Figs. 4 and 5 are modifications.
The box proper indicated by 1 may be of any desired shape; and the walls, bottom and top thereof may be put together by means of any approved form of joint at the corners.
2 indicates the cover or rolling top which is substantially the shape of one-quarter of a cylinder, the front upper corner of the box being of substantially the same shape for ornamental appearance. This cover is a plain sheet, curved in the form described and having a lip 3 on its forward edge adapted to rest upon a ledge 4 on the body of the box when the cover is closed.
The particular feature which constitutes my invention is the guide in the ends of the box which supports and directs the cover 2 in its movement. The preferred form of this guide is shown in Figs. 1, 2 and 3. It consists of a semi-circular internally projecting shoulder 5 formed in the two end walls 6 and 7 of the box. This shoulder runs parallel to the curved front of the box and extends rearward about 90 and is lo- "Specification of LettersPatent. P te ted June 11 1912.
mated November 24, 1911. Serial No. 662,251.
cated in the upper part of the end walls 6 and 7 so as to leave just sufficient clearance between the shoulder and the curved front of the box to freely receive the end edges of the curved cover 2. This shoulder 5 is formed by tip-setting or forcing inward the metal, of that portion of the end walls encompassed by the semi-circle of the shoulder. The shoulder is deepest at the upper part and gradually grows shallower toward its extremities. The up-set metal within the semi-circle is inclined slightly out of the vertical, as indicated at 8 in Fig. 3. but gradually merges into the vertical wall along a horizontal line connecting the extremities of the shoulder. When this shoulder or guide is formed in this manner it is not plainly visible, and furthermore is very strong because the inner edge of the shoulder is supported by the web 8. The lateral curved edges of the cover project over and rest upon this shoulder in the respective end walls of the box and furnish a free and easy guide for the cover to slide upon when it is opened or closed. This curved shoulder can be formed in other ways out of the metal of the end walls of the box. For instance, in Fig. 4 the metal is returned at once into the vertical plane after forming the shoulder, instead of gradually merging into the vertical plane. This arrangement is objectionable because it leaves a crack or crevice 9 where dirt will collect. In Fig. 5 a groove is formed in the vertical end walls by forcing the metal outward, the edge of the cover projecting into this groove. This is also objectionable on account of its prominence.
The preferred form is the cheapest, simplest and strongest method of forming the guides and renders it possible to make sheet metal boxes with roll top covers with comparative economy.
Having described my invention, what I claim, is:
1. A sheet metal box provided with a curved cover, two opposite walls of the box having struck up integral arcuate portions offset from the remainder of the walls, the edges of which portions form curved shoulders or guides for said cover, substantially as described.
2. A sheet metal. box provided with a roll top cover the end walls of which In witness whereof, I subscribe my signahave a semi-circular portion inclined lilnwiilrd ture, in the presence of two witnesses. forming an internal semi-circular s oul er or guide for the cover, which shoulder is JACOB SCHAFFER deepest at the middle portion of its curva- \Vitnesses:
ture and grows shallower toward its eX- WALDO M. CHAPIN,
tremities, substantially as described. WILLIAM C. LANG.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.