US149765A

US149765A - Improvement in the manufacture of hammer-heads

Info

Publication number: US149765A
Authority: US
Publication date: 1874-04-14
Anticipated expiration: 1891-04-14

Description

\ 1. n. uuusu. Manufacture of Hammer-Heads.

Patented Apri l14,18 74.

Attorneys.

PATEN JAMES R. LINDSAY, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN THE MANUFACTURE QF HAMMER-HEADS.

Specification forming part of Letters Patent No. 149,765, dated April 14, 1874; application filed February 2, 1874.

To all whom it may concern: 7

Be it known that 1, JAMES R. LINDSAY, of Chicago, in the county of Cook and State of Illinois, have invented a new and Improved Process of Manufacturing Hammer Heads and analogous articles; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, forming a part of this specification, in which Figure l is a perspective view of the double die. Figs. 2 and 3 are longitudinal sectional elevations of the dies. Fig. 4., amoditication of the form of blank-bar, exhibiting opposite ends in conjunction. Fig. 5 is a side View of the blank and end View of dies while the blank is being flattened on the sides after the operation shown in Fig. 2.

The invention relates to means whereby hammer-heads and analogous articles may be made in less time, and at less cost, than by any process now known to the public. These means will first be fully described, and then pointed out in the claims.

A represents a bar of iron or steel, from which blanks are usually made by cutting it up into suitable lengths, each of these lengths being subsequently finished 01f separately, so as to form it into a hammer-head. B is the hammerblank formed by my improved process, and O D the double die, or two dies employed by me for that purpose. I take an iron bar, A, sufficiently long to make two or any number of hammer-heads, and apply the die 0, with its vertical flange c,- across an angle of the bar and at the point ofjunction between two intended blanks. This flange 0, which is not half the thickness of bar, is then forced into the iron up to the faces 0 c, and is turned intermittently thereupon, while the die lies upon its bed. The flange 0 may be of any desired form, and may not have a bead on each side to form the chamfer. The operation is continued until a small central core, b, alone remains between the working-faces of the two hammer-blanks. The die -faces 0 c, which may be rounded at the corners, or of any configuration, at the same time condense the metal at each of the angles, so as to form an octagonal or other desired figure. Thus, I finish the working faces of two hammers, except where the cores are, and condense the metal around and just above them by a single rapid and effective operation, in less time and at less expense than is required by the old process to finish off the working-face of a single hammerhead. I then apply the double obtuseangled die D to make the two concavities b b on opposite sides of the bar, and to form a distinctly visible transverse line of demarca' operation with the cold-chisel to render them smooth and even. On the other hand, the central core of my blanks is readily and easily severed, with a clean cut, that leaves the working-face in approximately perfect condition.

This invention makes its maximum of saving in mason or sledge hammers, and heavy tools. There is also a saving of metal in my process by forcing the metal laterally into the' blanks instead of leaving it to be cut off, as in the old process.

Fig. 4 represents a modification embracing the same principle, but showing the opposite instead of the corresponding working faces conjoined by a small core, the whole of one face of two hammer-heads being wrought into shape simultaneously.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The bar, having each pair of blanks B connected by a central core, b, and the/lines of section clearly indicated, so that they may be readily transformed into a hammer-head, as described.

2. The die 0, having the middle flange c and faces 0 c, as and for the purpose specified.

JAMES R. LINDSAY. Witnesses:

SoLoN (J. KEMoN, CHAS. A. PE'r'rrr.