US326644A - Shearing-die - Google Patents

Description

(No Model.) X 2 Sheets-Sheet 1. H. HAMMOND.

4 SHEARING DIE.

No. 326,644. Patented Sept. 22, 1885.

. Witness 6.9: Inventor:

JZWM- W W \immm No Model.) 2 SheetsSheet 2.

H. HAMMOND.

SHBARING DIE.

No. 326,644. Patented Sept. 22, 1885;

Fig.6

min/68866: R an/$07 UNITED STATES PATENT OFFICE.

HENRY HAMMOND, OF NEW HAVEN, CONNECTICUT.

SHEARlNG-DIE.

SPECIFICATION forming part of Letters Patent No. 326,644, dated September 22, 1885.

Application filed December 26, 1884. (No model.)

T at whom it may concern.-

Be it known that I, HENRY HAMMOND, of New Haven,Connecticut, have invented a new and useful Apparatus for Forming the Edges of Axes and other Similar Implements Preparatory to Sharpening them by Grinding, of

- which the following description and claim constitute the specification, and which is illustrated by the accompanying two sheets of drawings.

This apparatus consists, essentially, of a. die in two sections,whieh shears off the blade of the ax on the line of the proposed edge, and may also be so made as to press the edge thus produced nearly to sharpness. The superiority of shearing off to upsetting the edge of an ax consists in the fact that shearing off does not injure the grain or disarrange the crystallization of the metal,as upsetting does.

Figure 1 of the drawings is a front elevar tion of said machine. Fig. 2 is a vertical cross-section of the machine on the line a a of Fig. 1. Fig. 3 is a perspective view of the shearingdie in two sections used in the machine. Fig. 4 isa front view of the die-sec tions of Fig. 3 when in junction with each other. Fig. 5 is a side view of an aX-blank, the blade of which has been drawn down to the proper thinness, but the edge of which blade still has an irregularity of outline consequent on such drawing down. Figs. 6 and 7 are edge and side views, respectively, of the aX-blank of Fig. 5 after its edge has been formed to the proper curve by the shearingdie of Figs. 3 and i.

The wheel 1 works the shaft 2, or runs loosely upon it, according as the treadle 3 is depressed or raised, the mechanism which locks and unlocks the wheel upon the shaft being identical with that fully described and shown in another application of mine of even date herewith for Letters Patent of the United States for a new and useful forging-machine. The eccentric 4 works the rod 5 and the dieholder 6, to which latter is fastened the upper die-section, 7. The lower die-section, 8, is fastened to the bed of the machine, and the recess 9in the latter conforms in shape to the blade of the 2LX bl2ti1k of Figs. 6 and 7.

The mode of operation is as follows: The operative holds the blank of Fig. 5 in the recess 9 in such a position that its side edges fit closely the sides of that recess. Then he depresses the treadle, and thus causes one revolution of the shaft 2. That revolution depresses the upper die-section, and thus shears off the blank of Fig. 5 on the line b b. Then as the upper die-section descends still farther it presses the curved edge thus produced hard down upon the upper border of the recess 9, and thus reduces that edge nearly to sharpness; or the die-sections maybe so made or so managed that they will cut off the blank on the line b b, but will not reduce its thinness adjacent thereto.

I do not herein claim the process of forming the edge of an ax or other implement for grinding by shearing it off on the line of the proposed edge, because that invention is the subject of another application for Letters Patent of the United States soon to be presented by me to the Patent Office.

I claim as my invention A shearing-die for forming the edge of the blade of an ax, and one section of which has the recess 9 for the accurate reception of the blade being sheared,and each section of which has an edge for shearing off the blade on the line of its proposed edge.

HENRY HAMMOND.

Witnesses:

ALBERT H.VALKER, FRANK A. PIERPONT.

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