US138975A - Improvement in bush-hammers - Google Patents

Description

.E. .l. WORCESTER.

Bush Hammers.

Patented Ma 13,1873.

WITNESSES AMPHOTO-UTHUGRAPHIC 00. Mm'oseamvals Pnocsss) UNITED STATES EDWARD J. WORCESTER, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN BUSH-HAMMERS.

Specification forming part of Letters Patent No. 138,975, dated May 13, 1873; application filed March 1, 1873.

To all whom it may concern:

Be it known that I, Enw. J. WORCESTER, of Worcester, in the county of Worcester and State of Massachusetts, have invented a new and valuable Improvement in Bush-Hammers, and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawing is a representation of the bar of iron as pressed. Fig. 2 is a perspective view of my bush-hammer. Fig. 3 is a sectional view of the same.

My invention relates to certain improvements in the manufacture of bush-hammers used in stone-dressing and it consists in a bar from which are cut the two sections composing the bit-holders, said bar being formed by rolling and planing instead of forging by trip-hammer or drop-hammer, as heretofore.

In the drawing, A represents a bar of iron which has been prepared and finished according to my improved process, ready to be cut into sections. The bars are first passed between the proper rollers a suitable number of times to upset the metal suflieiently and give the bars something of the required form. They are then placed in the planer and fin-- ished and dressed to the exact shape and dimensions requiredfthat is to say, one surface of the bar has each side rounded as shown at a, and on the opposite surface is formed a central longitudinal groove, 1), with a square shoulder, c, on each side. When the bars are finished and dressed they are out by a milling machine into pieces of the required width to form the sections B of the hammer. When the sections are placed together, as shown in Figs.'2 and 3, the grooves b form the eye for the handle, and the space between the shoulders 0 forms the recess for the bits D, which are placed in position with the gibs G at their bases, and the parts secured by'screw-bolts E in the usual manner.

What I claim as new, and desire to secure by Letters Patent, isx In the manufacture of bush -hammers, :a bar formed by rolling and planing, from which the hammer sections may be cut, substantially as shown and described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

EDWARD J. WORCESTER.

Witnesses PATRICK DONAHER, WARREN ALLns.

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