US368125A - Rudolf berchtold - Google Patents

Description

(No Model.) v

R. BEROHTOLD.

CUTTING DIE FOR WIRE NAIL MACHINES. No. 368,125. Patented Aug. 9, 18'87.-

UNITED STATES PATENT rrrcn.

nnnonr nnnon'roLD, on NEW BRIGHTON, PENNSYLVANIA, ASSIGNOR .ro

w. r. TOWNSEND & 00., or SAME PLACE.

CUTTING-DIE FOR WIRE-NAIL MACHINES.

SPECIFICATION forming part of Letters Patent No. 368,125, dated August 9, 1887. Application filed May 2, 1887. Serial No. 286,755. (No model.)

To aZZ whom it may concern:

Be it known that I, RUDOLF BERoHroLD, residing at New Brighton, in the county of Beaver and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Outters for Wire-Nail Machines, of which improvements the following is a specification.

The invention herein relates to certain im provements in cutters employed in wire-nail machines for severing the nails from the wire stock, and has for its object such a construction of the operative edge of the cutters as will enable the cutters to simultaneously sever the nail from the wire and impart a wedge-shaped point to the severed nail, and will also facilitate the discharge or disengagement of the finished nail from the cutters.

In general terms, the invention consists in the construction and combination of parts, substantially as hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a yiew, partlyin elevation and partly in section, of the cutters at the end of the cutting operation. Fig. 2 is a plan view of the cutters at the outward limit of their movement; Fig. 3 is an end elevation of the female cutter.

In the front or operative end of the female cutter 1 is formed a groove or recess, 2, of a V width at one end alittleless than the diameter one side of the nail-point.

of the nail to be formed. The side walls of the recess are inclined outwardly from one side of the cutter, thereby imparting a V-shaped appearance to the'recess, (see Fig. 3,) and the bottom of the recess is inclined inwardly, (see Fig. 1,) the angle of such inclination corresponding to the inclination to be imparted to This inclination or cutting away of the bottom of the recess form the cutting-edge 3.

The male cutter 4 is provided with a rib, 5, extending across its operative end, corresponding in shape to the contour of the groove 2, and adapted to fit snugly within said recess. At its narrow end the rib projects from the block a distance equal to the depth of the groove in the. female cutter at the narrow or cutting end r. 6., about half the diameter of the nail to be formed. (See Fig. 1.) The face of the rib is inclined inward from its narrow end at an angle equal to the'inclination of the bottom of the recess, but in an opposite direction, (see Fig. 1,) thus forming a cutting-edge, 5, at the narrow end of the rib. As the cutters approach each other in operation the wire is forced into the groove 2; but as said groove is at its narrowest end of less diameter than the wire a wedge-like piece is sheared off from each side of the wire by the conjoint action of the edges of the groove and rib, the greatest depth of cut being of course at the narrowest ends of the rib and groove. As the cutters continue their inward movement the cutting-edges 3 and 5 are forced inwardly through the wire, and the inclined face of the rib and the bottom of the groove compress the sides of the nail adjacent to the end and impart thereto the wedge-shaped point. (See Fig. 1.) This swaging or compressing action of the cutters causes a slight elongation of the nail, as all lateral expansion is prevented by the sides of the groove. The rib and groove are made of width less than the diameter of the wire at the cutting-edge for the purpose of preventing an enlargement of the nail at its end when compressed, and the inclination of the sides of the grooveprevents any tendency of the nail sticking in the groove on account of lateral expansion under compression. In addition to shaping the ends of the nail, the force exert'ed'by the inclined face and bottom of the rib and groove will shoot the nail out from the groove when severed from the wire.

I claim herein as my invention- 1. In a wire-nail machine, the combination of cutter-block 1, having a transverse groove in its operative end, the bottom of said groove being inclined, thereby forming a cutting-edge and a swaging-face, and cutter-block 4., provided with a rib or projection constructed to fit within the groove in the block 1 and having its wall inclined, thereby forming a cutting-edge and a swaging-face, substantially as set forth.

2. In a wire-nail machine, the combination of cutter-block 1, having a transverse groove in its operative end, the sides and bottom of In testimony whereof I have hereunto set said groove being inclined, as described, and my hand.

cutter-block 4 provided with a rib or projecr 7 tion construct-ed to fit within the groove in the RUDOLF BEROITTOLD' block 1 and having its side and front Walls \Vitnesses:

inclined, as described, substantially as set H. \V. WILDE, forth.

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