US390421A - Box and drawer corner - Google Patents

Description

(M'odeL) J-. B. WEST.

302; 011 DR WER- CORNER.

Patented Oct. 2, 1888.

UNITED STa s PATENT OFFICE.

JONATHAN B. WEST, or ROCHESTER, NEW YORK.

BOX AND DRAWER com ca SPECIFICATION forming part of Letters Patent No. 390,421, dated October 2, 1888. Application filed December 21. ts-l. Serial No. 259,064. (man 1 To all whom it may concern.-

Be it -k down that 1, JONATHAN B; WEsT,f

Q Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Box and Drawer Corners, whichimprovement is fully set forth in the following-specification and shown in the accompanying drawings.

The object of my invention is to produce a new form of interlocking tongue and groove for a box-corner, the invention being hereinafter fully described, and more particularly pointed out in the claims.-

Referring to the drawings, Figure 1 shows a corner of a box formed in accordance with my invention, the observer looking into the box; Fig. '2, anelevation of the-corner of the box,viewed from without, the two joined sides being sectioned in part upon the dottedlinear: in Fig. 1. Fig. 3 shows the two sides separated. Fig. 4 is a viewof the inner face of one of the sides, seen as indicated by arrow 3 in Fig. 1, a part of the bottom being shown sectioned on the dotted line 2. Figs. 5 and 6 show modifications.

In forming'a box-coruer having mutuallyiuterlocking tongues and grooves it is desirable,0n account of strengt-h,to have the interlooking parts numerous, in order to increase the number of glue-joints, or the number and extent'of the surfaces of the two parts forming the corner covered by the glue and in contact. It is also desirable to have the sides of the tongues and grooves inclined instead of being plane surfaces, as when thus formed the joined sides resist separation with greater force when acted upon by stresses exerted outward against their innerv faces or fromdirect pulls .upon them. the boards out of which the boxes are to be formed to a convex form, inclined, asshown, to the surface of the board, after which I pass the ends of the boards successively under a revolving cutter, which forms the grooves.

Referring more particularly to the parts as shown in the drawings, A represents two sides -of a wooden box joined to form a corner, and

B the bottom board. 0 The ends of thc'sides are not cut to plane surfaces, as in the miter form of joining the sides, but are each formed convex, as shown at a,'and afterward formed with a seriesof grooves, b, cut acrossthem, as shown.

-ness to the width of a. groove. surfaces of the grooves are concaved to a curve .ter,'and the side faces.of each tongue being tailed part.

stance,

width of the tongues attheir middle parts is To .make these boxes I cut the ends of.

shown.--'

abruptly, orbyplanes which are continuations These grooves are preferably made narrow and equally spaced, having a' tongue, 0, between each two adjacent grooves about equalin thick- The bottom similar to the convex curve of the edges (1 of the tongues or the blank ends of the side pieces before the grooves are formed. I give to these tongues and grooves a spiral form, the cutter above referred to being in the form of a spiral, the tongues and grooves'being inclined according to the inclination of the spirals of the cutwinding in consequence, instead of plane surfaces. The right-hand face of each tongue, as appearing in Fig. 4, is slightlyundereut, havinga form in some degree representing adove- On account of their curved form the tongues and grooves taper each way from the middle to edges or nothing at the lines e, so that when two sides are accurately joined neither the tongues norgrooves will appear, excepting as to said lines e, which together form, for ina corner line, as shown in Fig. 2. The

such that they lap sufficiently upon each other to receive the glue, and hold firmly together.

passing through tongue or groove forms an angle of forty-five degrees with each of the inner. faces of the two other, so. that each tongue of one side'coines opposite a groove in the other. To add to the v strength of a corner, anail or pin, f, may be inserted to pierce the overlapping tongues, as

It is sometimes desirable to form the parts as shown in Fig. 5, in which case the ends of the tonguesatthe inside of thebox terminate of the inner surfaces of the two respective sides of the box. These planes are inclined to the axes of the respective tongues and define the inner ends of said tongues} This gives atrowelshaped bearing betweencontiguous tongues.

In case one side of the box is thicker than the adjacent sides,

as shownin Fig. 6, the thicker side mayextend to the amount of the 80 l The partsare preferably formed so that-a plane the points or lines e e of a difi'erencc in thickness between it and the thin side beyond the ends of the tongues of the thin side without the box. In this construction, as in the construction shown in Fig. 1, the ends of the tongues do. not show either without or within the box. r

hat I claim as my invention is- 1. A packing-box having the joined ends of its sides formed with inclined interlocking tongues and grooves, the bottoms of the grooves being concaved and the edges of the tongues being convexed, substantially as shown.

2. A box having its sides formed at theirends with inclined tongues and grooves, each tapered or narrowed to a line or edge at its ends, said edges or lines of the tongues and grooves being in a plane forming an angle with the inner faces of the adjacent sides of the box.

- 3. A box having itscorners formed with inclined interlockingtongues and grooves, incom- '20 bination with fastening-pins passed through the tongues, said tongues and grooves being oval in form, substantially as shown and described.

4. A packingbox having the joined ends of 25 its sides formed with inclined interlocking tongues and grooves,the bottoms of the grooves being concave and the edges of the tongues being convex, the inner ends of said tongues being defined by planes inclined to their axes, 0 substantially as shown and described.

JONATHAN nnwns'nd Witnesses:

E. B. WHITMoRE, M. L. MODERMOT'I.

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