US 1523781 A
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H. E. KEYES Jan. 20, 192s.
HAMMER Filed Oct. 5, 1923 Patented Jan. 20, 1925.
UNITED STATES HENRY E. KEYFS, OF SMITHVILLE, NEW JERSEY.
Application filed October 5, 1923. Serial No. 666,716.
To all whom it may concern:
Be it known that 1, HENRY E. Knrns, a citizen of the United States, residing at Smithville, in the county of Burlington and State of New Jersey, have invented certain new and useful Improvements in Hammers,
of the hammer head partially in section on v the line 2-2 in Fig. 1. Fig. 3 is a side view of the plug after being inserted in the socket, and is partially in section on line 33 in Fig. 1. Fig. 4f is a side view of one end portion of the hammer head, showing the means for removing the plug; and Fig. 5 is a section, taken on the line 5-5 in Fig. 4.
The head 7 of the hammer is formed of hard metal, and is provided with a handle 8 in the usual way, and it has a socket 9 at one end, or preferably similar sockets at each end. The socket 9 is preferably cylindrical, and it has an undercut circumferential groove 10 at its bottom. Slots 1.2 and 1d are formed in the sides of the socket, and are arranged crosswise of each other, and preferably at a right angle. These slots are preferably arranged diagonally of the hammer handle shown in Fig. 1, but they may be arranged in any other convenient position with reference to the handle, and they may extend to the outer end of the socket as shown at the left hand in Fig. 2, if desired. Light hammers can be made in this manner, but heavy hammers preferably have slots as shown at the right hand in Fig. 2, which do not extend to the outer ends of the sockets, as the sockets are then stronger, and their side walls are less liable to spread apart. In each arrangement of the slots, they extend lengthwise of the hammer head on each side of the circumferential groove 10 and cut away portions of the groove and portions of the side wall of the socket 9. A plug 16 is inserted in the socket 9, and its projecting end forms the striking face of the hammer. The plug 16 is preferably formed of copper, but it may be formed of any other approved metal or material, or it may be faced with any other approved metal or material, such as aluminum or raw-hide.
The inner face or end of the plug 16 is dished, so that a longitudinally projecting head 17 is formed at its periphery. hen the plug is driven into the socket this head is spread outwardly into engagement with the groove 10, by contact with the bottom of the socket, so that the plug is retained in place. The portions of the bead which come opposite the slots 12 are not spread outwardly as shown. in Fig. 3, but remain as shown in Fig. 5.
The continued use of the hammer operates to secure the plug more tightly in place. The bottom of the socket adjacent to the groove may be beveled or may be made of any form that will assist in spreading the bead.
When the striking face is worn out, the plug is removed by means of a push bar 18 and a drift 19. The push bar 18 is inserted through one pair of slots behind the plug, and the tapered drift is inserted through the other pair of slots behind the push bar. The push bar may be a wire nail, and it may be bent as shown before being inserted, or it may be bent by the drift. The slots 12 and 14 extend through the metal. at the bottom of the socket, and are made of a sufficient length to receive the push bar and the drift. When the tapered drift is driven in it presses the middle part of the push bar against the center of the plug, so that the plug is driven out without tipping or jamming, and its bead is contracted by engagement with the wall of the socket. The push bar 18 is necessary to avoid spreading the parts of the bead which come opposite the slots, as shown in Fig. Two slots arranged crosswise of each other are necessary, one being for the push bar and the other for the drift.
lVhat I claim is:
-1. A hammer head provided with a cylindrical socket of uniform diameter from end to end and having an undercut circumferential groove at its bottom end, said socket having slots which extend through its sides and cut away portioi'is of the said groove and portions of the side wall and bottom wall of the said socket, and
having its inner end dished to form a bead, portions of which are expanded. intotlie said groove by .impact against "the intersectingly grooved bottom of the socket.
2. A hammerhead 1S S@t forth in claim 1 and having its said slotsextended for? ward socket.
3. A hammer head as set forth. in claim 1 and provided with a handlefiand having its said slots arranged diagonallygof the axis of the handle.and crosswiseof each other.
4-. A hammer head provided with a cylindrical socket of uniform diameter from end to end, andhavingan undercut) 1y for the full length of the said I circumferential groove at its bottom end, a striking plug fitting n the said socket and said socket having also slots in its sides arranged crosswise 0t each other and cutting away portions of the said groove and affording passages for a push bar and a drift, and a striking plug slidable in the said' socket and having at its inner end a flatcentral portion for-the push bar to bear against and a longitudinally projecting bead, portions of which are bent by impact against the bottom of the socket and form a series of projections which engage with the said groove and normally retain the plug in the socket.
In testimony whereof I have aflixed my slgnature.
HENRY E. KEYES