GB189801389A - Improvements in Forming and Jointing Sheet Metal Structures. - Google Patents

Abstract

1389. Robertson, A. Jan. 18. Stoves and fireplaces ovens; casings and linings.-Relates to the manufacture, and especially the jointing, of sheet-metal structures such as stoves. In making a stove oven, for example, the sides may be cut out in one sheet, which is punched and dished into the required form with ledges for the support of shelves. The ends X, Y of the sheet, shown in Figs. 11 and 14, have apertures G<1> cut out and the parts G' dished. The sheet is bent into the shape, bringing the ends together, and the dished parts on each side passed through the apertures in the other. A key or strip G<4> can then be run through the open space formed by the dished parts. Fig. 12 shows a corner joint secured by an angle-iron strip. The bottom and top are secured by tie-rods and nuts, rolled metal sections, nicked and then bent to the required shape, receiving in grooves the edges of the sheet-metal shell forming the hob and base. The joints may be covered with ornamental strips. In the form of joint shown in Figs. 1 and 2, the plates A' and B<1> have interlacing tongues A, B respectively bent at right-angles and, if desired, turned through slots A', B' and clinched, the tie-rod D passing through flanges at the top and bottom of an ornamental covering-strip C. The tongues may be bent round the rod D like the socketsof a hinge. Figs. 6 and 9 show other forms of joint, in which a tie-rod and covering-strips are not necessary. The ends A', B' of the sheets A', B' are bent or fluted so as to interlock, and a slight taper may be given, the parts being slipped into position endwise. The form of joint may be that shown in Figs. 15 and 16<A>, in which studs H<1>, I' are pressed out of the metal sheets or flanges H, I fitted into one another, and tapped flat with a hammer.