US16481A - Sheet metal - Google Patents

Description

' UNITED sTATEs PATENT oEErcE.

SAMUEL HALL, OF NEW YORK, N. Y.

CUTTING SHEET METAL.

Specification of Letters Patent No. 16,481, dated January 27, 185'?.

To all whom it may concern.-

Be it known that I, SAMUEL HALL, of the city, county, and State of New York, have invented a new and useful Shearing-Machine for Cutting Large Sheets of Metal, &c.; and I do hereby declare that the same is described and represented in the following specifications and drawings.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction, use, and operation, referring to the drawings in which the same letters indicate like parts in each of the figures.

Figure l, is a perspective view of the machine showing the front end and right side. Fig. 2, is a perspective view showing a position of the front end and left side. Fig. 3, is a cross section above the score Z), b.

The nature of my invention and improvements in shears, consists in making the scores in the stock which the edges of the sheet metal cut pass into, within or below the line or plane of the face of each shear blade or cutter, and increasing them in depth as they extend from the cutters so as to afford room to vibrate the sheet of metal being cut edgewise, when the shears are open, or while they are cutting, and increasing the thickness of the stock opposite the scores, to give it strength when the scores are increased in depth.

In the accompanying drawings A, is the base of the stock or frame and B, the upright position which I prefer to cast altogether of iron or other meta-l, with two projections C, and D at the top for the journals of the shaft E, as shown in the drawing. This shaft is secured by the caps F, F, and provided with a loose and fast pulley for the band which is to operate the machine. The front end of the stock B, is provided with a box Gr, for the upper end of the traverse rod H, to work in; the lower end of said rod traverses between the cheeks I, I, of the stock as represented. This traversing rod I-I, is made in the form shown, with an oblong hole J, in it for the eccentric box K, to traverse in which operates it. The eccentric L, is made on the shaft M, which shaft extends through the stock B, in the enlargement N, made for that purpose and is fitted to turn in it, so as to carry the eccentric and traverse the rod I-I, which rod carries the shear blades O, and P, which are fastened to its lower end as shown in the drawing. The gear Q, is fitted to turn freely on the shaft M and is acted upon by the pinion R, fastened upon the shaft E, for that purpose; and a fly wheel may be applied to this shaft beyond the pinion R,

from turning on the shaft, which clutch is l fitted to traverse on said shaft between the stock and the gear Q, and is traversed, so as to lock the gear to, or release it from the shaft by the lever U, vwhich vibrates in the stand V, on the stock; one end of the lever U, being fitted to a score in the periphery of the clutch for that purpose. The front plate lV, is fitted between the cheeks I, I, and fastened with screws so as to hold the traverse rod in its proper place; this plate lV, extends up and is provided with a score for the ournal X, of the eccentric shaft M,

outside or beyond the eccentric; and they cap Y, is fastened to the plate YV, over the Journal X, and a bar Z, extends up from the cap with its upper end fastened to the box G, as shown in the drawing to support the journal X, outside or beyond the eccentric. The lower end of the traverse rod H, may be made in the form represented so as to carry two shear blades O, and P, arranged at right angles to each other and fastened to the lower end of the rod as shown in the drawing; which blades O, and P, act in connection with the blades O, and P, fastened to the block B', which may be made in the form shown in the drawing or of such other form as will answer the purpose, and fastened to the base A, as shown in the drawing or otherwise. The base A, has some lugs upon it which are perforated by the screws a, a, to aid in adjusting and holding the block B.

The blades O, and O, may be used to trim the edges of sheets of metal and for some other purposes without removing either of the blades P, or P; but if a large sheet of metal is to be divided by the blades P, and P', the blade O, must be removed so as to allow such sheet to be introduced between P, and P, so as to be cut by them, and every time P, is raised by the eccentric L, the sheet may be pushed is as the edges cut pass into the scores b, b, and 0, c; and as the score Z2, b, is cut within or below the line or plane of the face of the blade P, and the score c, c,

is cut below or within the line or plane of the face of the blade P, so as to allow the sheet oit' metal cut to be vibrated edgewise when necessary, as it is pushed in between the cutters, and in order lthat there may be ample room to vibra-te the sheet, as it is pushed in between the blades, I cut or make the scores b, b, and 0, 0, deepest at the rear edge of the stock as shown in Fig. 3, by the dotted lines, b, representing the bottom of the score b, b, and c', the bot-tom of the score c, c.

In order to secure the requisite strength in the stock B, opposite the scores, I make a swell or swell and ribs CZ, on the stock opposite the score I), Z1, and another opposite the score c, c, as shown at c, Fig. 2.

Theneve-r it is desirable to use this ma chine for punching instead of shearing the blades O, and P, may be removed, also the block B', and a die block put in its place; and the shanks of the punches inserted in the lower end of the traverse rod H, which should be ,perforated for that purpose, when punching may be performed with as much, if not with greater facility, than it is on ordinary punching machine.

I believe I have described and represented the construction, operation and use of my improvements in shears so as to enable any person skilled in the art to make and use them; I will now specify what I desire to secure by Letters Patent to wit:

I claim making the scores c, c, and b, Z), in the stock of the shears for the edges of the sheet metal cut to pass into, within or below the line or plane of the Jface of each shear blade or cutter, and increasing them (the scores) in depths, as they eXtend from the cutters, substantially as described for the purposes set forth.

SAMUEL HALL.

Vitnesses: Y

J. DENNIS, JOHN S. HoLLINGsHEAD.

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