US443767A - Manufacture of dies - Google Patents

Description

(No Model.)

J. A. HOUSE. MANUFACTURE OF DIES.

ioirwemfor Jizmes A UNITED STATES JAMES ALFORD HOUSE, OF BRIDGEPORT, CONNECTICUT.

MANUFACTURE OF DIES.

SPECIFICATION forming part of Letters Patent No. 443,767, dated December 30, 1890.

Application filed October 26, 1890. Serial No. 369,302. (No model.)

To all whom it may concern.-

Be it known that 1, JAMES ALFORD HOUSE, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and usefullinprovements in the Mann facture of Dies; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certain novel and useful improvements in the method of producing dies, such as are used in connection with a cutting-punch, in check-punches, and similar machines; and the object of my invention is to greatly simplify and cheapen the manufacture of these. dies, while at the same time producing a very perfect article; and with these ends in View my invention consists in the method and the successive steps hereinafter fully explained, and then recited in the claims.

In order that those skilled in the art to which my invention appertains may fully understand how the same is to be practiced, I will now describe it in detail, reference being had to the accompanying drawings, forming a part of this specification, and in which Figure 1 is a plan view showing a machine capable of producing dies in accordance with my process; Fig. 2, a perspective of the bar after receiving the impression of the force; Fig. 3, a similar view showing said bar as partially cut through; Fig. 4, a section at the line a: x of Fig. (3; Fig. 5, a bottom plan view of the completed die, Fig. 6 a top plan of said die.

Like numerals and letters of reference de-' note the same parts in all the figures.

1 represents a carriage mounted and adapt ed to slide upon ways 2, arranged 011 a suitable bed or base 3, and 4 is a screw having a suitable handle, whereby the feeding movements of said carriage are effected. 5 is a seat or socket formed in said carriage, and 6 is a feeding-screw having bearings in the earriage and extending into the socket, as is clearly shown at Fig. 1. Upon a suitable base 7 is arranged a longitudinallymovable force 8, provided with means, as a cam-bearing lever 9, whereby it may be operated.

10 represents a shaft bearingaface-mill 11, behind which, upon a similar shaft, is a saw or mill 12. These two tools may be conveniently rotated at proper speed by gears 13, to which power is applied by any ordinary band-wheel 14. This machine forms no part of my present invention, and is merely incorporated in the drawings as an aid to a correct understanding of my process.

I first take a bar of soft steel A, which may be either square or of other convenient section, and insert it in the socket 5 with its ends projecting toward the force 8, the rear of said bar being supported by the extremity of the screw 6. Then by means of the lever 9 the force is operated against and into the end of the bar, so as to leave therein an impression B of the letter or figure borne upon the force, as seen at Fig. 4, said impression being preferably of a depth of, say, one-sixteenth of an inch. The face of the force is tapered. Therefore .the impression will be tapered. The force is then withdrawn. The action of the force will usually raise around the opening left thereby a slight bulge or swell upon the surface of the metal. This I remove by moving the carriage backward, so that the end of the bar may be reduced to a plane surface by the action of the face-mill. A further feeding movement of the carriage brings the bar against the saw or cutter 12, whereby is severed from the end of said bar a thin slab or plate 0. The thickness of this slab is determined by the depth of the impression made by the force and is such that the path of the cutter intersects the inner end of the opening impressed by the force, whereby the slab or plate when severed has an aperture therethro ugh corresponding with the impressed figure, as is shown in Figs. 4:, 5, and (5, and constituting the die. After being severed this die may be dressed or polished, if required. By the screw 6 the bar may then be fed forward for the next operation. It will be readily understood that the width of the opening in the face of the finished die will depend somewhat upon the plane at which the severing cut intersects the impression left by the force, as well as by the thickness of the face of said force.

I do not wish to be limited to the precise steps herein set forth since my invention is predicated upon the broad idea of impressing into a piece of metal the figure desired and then removing a portion of said metal in such manner as to uncover and expose the inner end of the recess or impression made by said force.

I claim 1. The method of making dies, which consists in first forming an impression in apiece of metal and then removing a portion of said metal, so as to uncover and expose the inner end of the impression, substantially as set forth.

2. The method of making dies, which consists in first forming an impression in a piece of metal and then removing a portion of said metal, so that the slab or plate will be perforated with the figure impressed, substantially as set forth.

JAMES ALFORD HOUSE.

Witnesses:

CHARLES H. .DHIOND, Janus CARR.

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