US80028A - Improvement in machine foe foeming sheet-metal pans - Google Patents

Description

@uitrit tsrs getint @ffice W.` H.. TEAL, OF WEYAUWEGA, WISCONSIN,

Letters Patent No. 80,028, dated July 14,1868.

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TO ALL WHOM IT MAY GONCERN:

Be it known that I, W. II. TEAL, of Weyauwega, in thecounty'of Waupaca, and State. of Wisconsin, have invented certain new and useful Improvements in Machines for Forming Sheet-Metal Pans; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompany: ing drawings, making partf thisspeeification, and to the letters ot' reference marked thereon, like letters indicating like parts wherever they' occu1. l

To enable others skilled in' the art to construct and use my invention, 4I willproceed to descrihe it.

My invention relates to machines for forming sheet-metalpans, and consists in the construction and arrangement of certain novel mechanicakdevicesfor the purpose of forming up the sides ofwhat-are known as square metal lpans by a single movement of the machine. i

Figure 1 is c perspective view of niy machine open, a-nd Figure 2 is a transverse vertical section of the saine closed. v

In constructing my machine, I make a 'low table, A, and pivot to its sides, at b, the arms a of a lever B, as clearly shown'in tig. l. Thertable A,`I make oblong, and at suitable points, near each end, and on a line running through its centre I rigidly attach actuating-guides, C, and near each side ofhthe `table and on a line running across its centre, and at' right angles to the former, a pair of similar actuating-guides, D, so

'arranged as to allow a cross-bar, E, to movevertically'between them.

'lo the under side of the cross-har E, Iattach a vertical pin, Z, which passes throughan opening in the table, and also through a brace or bearing, e, attached to the underside ot' the table, as shown in tig. 2.

The lower end of the pin l, I providewith a, head, d, to limit the upward movement of'the cross-bar E. Around the pin Z, I place a spiral'springym, withjts upper end bearing against the under side ot' the cross-bar E, and its lower against the hearing or support c, as shown in fig. 2. i i

The ends of `the cross-hariE, I connect with the arms a of the lever B by rods or short pit-uren,f, so as to allow of easy turning at the points ot` connection. t

Onthe upper side of thecross-lmr E, I rigidly attach the die .`F which has hingedto its sides the formers g, which have their ends so shaped that, when turned at a certain angle, they will come together and ina-ke a corner.

Oa the face of the formers g, Ii'asten small projections, 7L, for the purpose of holding the metal plates 'placed thereon in afixed position, all as clearly shown in I.

OU the cross-bar E, between its ends and th-e formers g, Iottaeh two uprights, z' and j, and to the upper end ofthe upright, j, I hinge a bar, G,'ot` suticieut length `to reach the upright, z', and provided with any suitable device for locking it readily and securely, with a corresponding device o n the upper end of the upright, z'.

'lo the under side of the bar G, I attach rigidly adie, II, having its face'of the exact size of `the 'face of the die F, and its sides sol shaped that the fornlers g will {itaccurately 'against them when turned up for that purpose. I Y l The cross-bar E, I also provide with flanges n, to prevent any lateral movement in the guides I). In operating my machine, I first place it in the position shown in fig. 1, with the upper die II thrown back, and the lower die I", and its foi-mers g, presenting u level surface. VThis position ofthe die F, with the formers g, which turn readily on their hinges, is detertnined by thespiral spring' m and the actuating-guides D and G, as the spring m holds upthe die F, and the former-s g are held on a level with it hy the actuating-guides D and C. On the die I", and within the projections on the formers g, I place the metal plat-e o, and bring down the die I'I firmly-upon it, and lock it there by rneans of the locking-device on theends of the bar G and the upright, z', as shown in tig. 2.

By this means, not only the dies II and I", with the metal plate between them, becomermly hound together, but also the cross-bar Ewith them.

. en ,oza

I then press downen the lever B, which draws down thecross-bar E and the'dies H and F. As the die F descends, the Aactuating-guides and C cause the fox-mers y t'o turn up against the sides of the die H, and in doing so to form up the sidesV of the metal. plate'o into the shape of a square pan, as desired, all as clearly shown by the red lines in fig. 2. As soon as thewloverB is released, the spring m will elevate-the cross-bar E, with its attachments, to its original position, and the foi-mers will fall back on the guides D and C. The bar G is then released,the die H raised np, and lthe pan taken oil'. The corners of the pan will be found folded in 'such va way that they can be readily beaten down and fastened. -.The edge 'of thol pan is then wired and'completed. v

As soon as onejmetal sheets thus formed and removed from the .dies, another is put 'on and formed, and thus the process is continued indefinitely.

y I am aware that dies have been used for forming dishes, cups, boxes, and' similar articles, andthat dies similar to those employed in my machine, with hinged formers, as in the patent oiEaA. Smead, March 2,1858, havebsen used. But in this patent, owing to the fact that the upper die is attached to a plunger which pressesl thedies downward, it is found impracticable to have them, nnder'these circumstan'ces,'ho ld the metaly platewith suiicient firmness between them Vto secure a square c orner at the place-of bendingup-its sides by the formera.

In myv machine the dies are made to grasp the metalplate so that it cannot move; Aitis:secnrely.locked,-

and the formers must bend it so as to form square corners inl the line of bending.

. My machine is exceedingly simple in construction, and most' of vit can be made froml castings, and there-f fore can b e gotten up so cheap as to comewithin the means of thetrade generally. Its praeticability at once demonstrates its advantage over all similar devices known to mehnving for their object a similar purpose.

Having thus described my invention, what I claim, is-I M l.

A machine for forming sheet-metal pans, consistiijlgl of an upper die, H, hinged to a lower die, E,pro

. `vided with Iformersg, so that both dies may be firmly locked together, and 'the whole operated simultaneously with the lever B and actuating-,guides D C, substantially as herein described. t y.

Witnesses:

H. B. MUNN, P. T. Doven.-

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