US219271A - Improvement in machines for shearing sheet metal - Google Patents

Description

2 Sheet s-Sheet 2.

`c. E.. KENNEDY.V Machine for shearing Sheet-Metal.

No.219,2111 atented sept. 2,1879.

' removed.

Vwhen the carriage F is used.

UNITED STATES PATENT OFFICE CHARLES E. KENNEDY, OF HATLEY, QUEBEC, CANADA.

IMPROVEMENT IN MACHINES FOR SHEARING SHEET METAL.

Specification forming part of Letters Patent No. 219,271, dated September 2, 1879 application iled March 18, 1879.

i ings, and to letters of reference marked thereon, which form a part of this specification.

The object of my invention is to provide a compact and simple arrangement of a radiusarm having an adjustable axis, and carrying at its free end clamping-plates and operatinghandles, with two pairs of cutting-disks, the inner pair being made adjustable in such a manner that sheets of metal may be cnt into segmentsof circles of various widths, which, before being released, are carried to an adjust- Iable table provided with knives or shears so shaped and arranged as to trim to the desired form those edges of the sheet not previously operated on, and producing asheet of the proper pattern for immediate forming into cups, dippers,cpans, Src., according as the machine is set for such products. My invention also provides for the removal of the radius-arm and the substitution of a carriage therefor, the carriage moving in a right line, and provided with clamps for holding sheet metal to be cut in parallel strips.

Figure 1 is a front elevation of a machine embodying my invention. Fig. 2 isa vertical transverse section of the same, taken on the plane of the line ze, Figs.p1 and 3. Fig. 3 is a plan of the same. Fig. 4 is a front elevation, showing the parallel cutting attachment as in use, the radius-arm and clipping-table being is the base; B, the upper guideway, C C', the standards; D, the clipping-table; E, the radius-arm, F,the parallel cutter-carriage.

The base A is made in one piece, and is provided with a slotted guideway, a, Fig. 3. At right angle-s with this is a track, j, used only Two vertical standards spring from the base A, and carry 4 at their summitsthe guideway B. `The other extremity of the said guideway is supported by a semicircular guide-rest, b, supportedfat either end by uprights c, reaching to the base A. The radius-arm E is pivoted at al to the top of the guideway B, Fig. 3, in one of the holes e e. The opposite end of said radiusarm carries ahandle, f. Below this are clamps g, operated by a cam, h.

Referring to Figs. l and 3, it will be seen that the radius-arm also carries on the lefthand side a rectangularly-bent piece, t', which serves to support the lower plate of the clamps g, which is placed at the proper level with the cutting-disks m m o o to cut without raising or lowering the edges of the sheet being operated on.

The frame G springs from the front righthand corner of the base A, and at the proper height extends horizontally to the left, at the end of which ism'ounted the upper plano-convex cutting-disk, m', its convex side facing the radius-arm E.` Immediately below the disk m' is the one, m, made in the same shape, but having its convex side opposite the one, m', the peripheries of the plane sides being contiguous, and slightly overlapping in the manner in common practice with this class of cutters. The disk m is mounted on a vertical stud, Z, secured to the base A.

The cutting disks o o are arranged in the same manner as those m m described, with the exception that the convex sides of the disks o m and 0 m are reversed respectively. Disk ois journaled to the sliding standard p, the upper one, o', being similarly supported by the hanger p', workin g in the horizontal slot q in the guideway B.' The base of the standard p slides in a slot in the base A, Fig. 3. The standard p and hanger p being horizontally adjustable in a line with the guideway AB enables the distance between the disks m m and o o' to be increased or decreased when desired; The radius-arm E is also adjustable, there being holes e e in the said radius-arm, and corresponding holes in the guideway B,one hole of each being pivoted together by the pin d, affording means for enlarging or reducing the circle described by the clamps g.

Adjustable stops r s t determine the position of the sheet to be cut when placed in the clamps g, which are carried toward the said stops until arrested by the pin lc coming in contact with the radius-arm E. A sheet of metal having been placed in the clamps g in the proper position for trimming and securely clamped, the stop t is set to touch one end of the sheet, those s i" being similarly adjusted to engage with one edge of the same, and there secured, thus insuring a like position in the clamps g of every subsequent sheet operated on.

The stop r, being at a point where projections on the sheets would strike, is pi Voted with a finger which maintains its vertical position by means of a coiled spring, thus permitting 'said finger to yield.

A sheethavingbeen placed in the said clamps and fastened by the cam h, when they are at the right hand of the cutters m m' and o o the free end of the radius-arm E is carried to the left by means of the handle f, during which operation two opposite edges ofthe sheet, coming in contact with aforesaid cutting-disks, are trimmed to circles determined by the position of the pivot d and the distance of the disks o o from the disks m m. A pill, lc, on the semicircular guide-rest b, insures a like adjustment of every sheet, which, having been trimmedin the manner described, is carried by the said clamps to the clipping-table D, passing .beneath the knives y. v At the same time the clipping-table is partially revolved by the lower clamp-support, z', entering a slot, u, in the said table.

A portion of the sleeve -w is cut away at a point to correspond with the position of the pin v in the post w, being cut away in such amanner that the ends of this cut portion of the sleeve strike pin t when the table D (which is secured to said sleeve) is made to partially revolve by the clamp-support i entering or leaving the slot a in the table D. The rotation of the cam -support i, slot a, and pin fu is such that the slotted edge of the table D, when turned as far to the left as the pin t will permit, will always be in the proper position for the cam-support i to enter the slot u. This relation is also such that the table D, by means of the clamp-support i and slot a, may be turned to the right until arrested in that direction by the said pin c, when lines parallel with the shear edges of table D will cross each other on the longitudinal line running through the center of motion of table D from the circle described by the outer edge of the sheet being operated on in its transit from the shears m m to the said table.

A foot-lever or other con venient device, connected with the vertically-sliding bar m, causes the cutting-edges of the knives y to descend below the plane of the top of the table D, clipping ot't' the ends and corners not before operated on.

The bar .r slides on guides attached to the sleeve w', as shown, and is returned to its original position by means of a spring, n.

Different-sized cli pping-tables D and knives y are used for different-sized sheets.

When it is desired to cut sheets having parallel edges, the radius arm E is'removed, and the carriage F placed on the track j, the said carriage being constructed to fit the said track and move truly thereon. The top of the carriage is provided with clamps g', similar t those g on the radius-arm E.

.By means of the handlef the carriage is propelled forward, when the edges of the sheet which has previously been clamped thereon are trimmed by the disks m fm', or by those and o o simultaneously.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the adjustable radiusarm E, adjustable clamp g, cam h, and frame i, as set forth.

2. The combination of frame B C G, an adj ustable radius-arm, E, frame t', clamps g, and semicircular guide-rest b, substantially as set forth. 1

3. The combination ofthe radius-arm E with the semicircular guide-rest b and adjustable cutters o o', the former in the guideway B and the latter in the base A, substantially as set forth. j

4. The combination and arrangement of the adjustable stops r s t with the radius arm E and clamps g, substantially as set forth.

5. The combination of the partially-revolving slotted table D, clamps g, and support i, substantially as shown and described.

6. In combination with a radius-arm, E, the clipping-table D, knives y, and bar a', operating substantially as set forth.

In testimony that I claim the foregoing as myown I aflix my signature in presence of two witnesses.

CHARLES EDGAR KENNEDY.

Witnesses:

A. Gr. LITTLE, F. A. WIsWELL.

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