US552848A - Bush-hammer - Google Patents

Description

G MAIN BUSH HAMMER.

, (No Model.)

No. 552,848. Patented Jan. 7, 1896.

gw Z fu im l ///////AV//////A WIT ,55555 UNTTED STATES PATENT @erica GEORGE MAIN, OF QUNCY, MASSACHUSETTS.

BUSH-HAMMER.

SPECIFICATION forming part of Letters Patent No. 552,848, dated January 7, 1896.

Application tiled May 6, 1893` Serial No. 473,258. (No model.)

.To aU 107mm/ it may concern:

Be it known that l, GEORGE MAIN, of Quincy, in the county of Norfolk and State ot' Massachusetts, have invented certain new and useful Improvements in Bush-Hammers, of which the following is a lfull, clear, and exact description.

This invention consists of a bush-hammer constructed and arranged for operation, all substantially as hereinafter described, reference being had to the accompanying sheets of drawings, in which- Figure l is a perspective view; Fig. 2, a longitudinal central section of a bush-hammer constructed in accordance with this invention.

ln the drawings, A is the hammer; B, its head,which consists of an oblong block of suitable metal, of the width desired for the cut-- ters C, and oi a thickness a little more than the aggregate thickness of the several cutters when secured in place.

D is the hole or aperture in the head to receive the handle, as usual.

E are two plates of the width oi' the head, each having a transverse recess or groove F on one side having shoulders G, in which recesses the head is placed, the two plates being placed over the head, as shown, closely litting the same, the free ends ll of the plates extending beyond the head, leaving a space J between them, in which is placed the cutters C of the number desired, their inner ends K resting and bearing against the ends L of the heads.

The head on each side at M at each end is cut away back from the end preferably in an inclined direction, as shown, leaving the edge or bearing place N for the plates. These plates are applied in place on the head a-nd all riveted together by the rivets P to be :firmly and rigidly connected thereto, and the cutters then put in place between the free ends 1l of the plates and secured by the bolts Q passing through the plates and cutters. The head makes a firm and solid seat for the cutters, and the plates having the recesses F, so that their free ends entend over the ends of the heads, as shown, make the seats for the cutters a short distance from the sides R of the head, whereby there will be no danger of clipping or breaking the head, and thus the firmness of the seat for the cutters is secured.

By having the bearing-line N of the plates on the head back from the ends of the head, the plates have more or less spring beyond the head without diminishing their hold on the cutters, by which when the bolts are taken out the cutters can be easily removed from the head when desirous of sharpening them, or for other purposes,and as easily put in place again.

The bearing-line N on the head for the plates can be made or arranged in any other suitable manner than as herein particularly shonuifor instance,by a right-angular shoulder-although it is preferable to cut it away gradually or beveling, as shown, as it does not weaken the head quite so much, and leaves the bearing end L of the head as well for the purpose described.

If desirous, the recess in the plates can be dispensed with, the plate being straight, but it would not be so well, as the outer cutters would not have sufficient bearing on the head to give the firmness and resistance desired.

The plates have transverse ribs S on their inner side which are disposed in transverse grooves T in the sides, closely fitting the same, of the head, and preferably located where the bolts are, as shown, which relieve the blow and strain upon the rivets in the u'se of the hammer, although these ribs and grooves can be dispensed with` As is obvious, only one end of the hammer need have the head and plates arranged to receive the cutters, so it can be used in chisel form, one end being a duplication of the other.

Having thus described my invention, what I claim istl. In a bush hammer, in combination, a head, plates one on each side secured thereto, extending beyond the end of the head, each plate having a transverse recess in its side next tothe head in which the head is disposed, each plate beyond the head extending a short distance over the end of the head, and the bearing line for the plates on each side of the head being back from its end.

2. In a bush hammer, in combination, a head having a transverse groove on each side, plates secured thereto, one on each side, each IOO havinga transverse recess for the head and a transverse rib to fit the groove in the head,

, and the head having its bearing line for the Li. In a bnsh hammer, in combination, a head having a transverse groove on each side, plates secured thereto, one each side, each having a transverse rib to fit said groove, and said head having the hearing line for the plates on each side back from 4its end.

In testimony whereof I have hereunto set my hand in the presence of tivo subscribing witnesses.

GEORGE MAIN.

TWitnesses:

EDWIN W. BROWN, LEONA C. ARNO.

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