US314291A - Bush-hammer - Google Patents

Description

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' W. H. HARPER.

BUSH HAMMER.

No. 314,291. ,K A Patented Mar. 24, 1885.

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wlTN E'SSESl INVENTOR TORNEY wirev STATES PATENT @Trient WESLEY H. HARPER, OF BERLINSVILLE, PENNSYLVANA.

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SPEUIFECATION forming part of Letters Patent. No. 314,291, dated March 24, 1885.

Application ed June 1P. 1894. (No model.)

To all whom, it may concern:

Beit known that L WESLEY H. HARPER, a citizen of the United States, residing at Berlinsville, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Bush-Hammers, of which the following is a specification, reference being had therein to the accom panying drawings.

My invention relates to certain improvements in bush-hammers, and is designed to allow the easy placing and removal of the cuts, to hold them iirml'y in place, and provide a means whereby the least waste ot' the material ofthe cuts possible is accomplished.

In describing the device, reference will be had to the accompanying drawings, in which Figure l represents a section longitudinally through the hammer; Fig. 2, a plan view of an eXtra gibj and Fig. 3 a plan and edge View of a tillen l A designates the body of the hammer, constructed preferably of steel, and constitutes what is technically knownas the pole of the hammer. Each end of the said pole is slotted for the reception of the ends of the cuts B, and also at each end, on one side, is recessed for the reception ofthe movable jaws C. These jaws are so constructed as to project overthe ends ot' the cuts coincident with the fixed projecting jaws D on the pole. The bearing end of the jaws is shouldered and the continuation toward the other end gradually thickened, so as to make the thinnest portion of the jaw at the beginning of the shoulder. This gives the shouldered portion considerable play, forming a strong clamping-lever of the said jaw, the thickened end being the fulcrum, the bolt the power, and the shoulder the bearing portion. Thejaw being thickened toward the one end', gives it a greater play than though it were of the same size. Passing through the jaw and into the body ofthe pole is a bolt, E, having the portion directly in the jaw beveled, as shown at F. This allows the quick disengagement of the jaw and the cuts when the bolt is' loosened but slightly, as aA small withdrawal of the said bolt, by reason of the bevel, quickly diminishes the relative diameter of the bearing portion F, and so allows considerable lateral and, of the shouldered portion of the jaw, vertical play. Both the fixed and the movable jaw are provided with a slot, G,-in which is adapted to t a lug, H, on the ller I, to prevent it slipping from its place in the hammer, its purpose being to vrest between the cuts and the jaws between which they set, and aid materially inA keeping the said cuts iirmly clamped in place.

Centrally in the slots in which the cuts rest is a lug or key, L, which is preferably bev eled, and is for the purpose of easily disengaging or relieving the cuts when the jaw is' loosened, and also keepingthem tirmlyinplace and preventing them moving when clamped. An extra piece or gib is provided to allow the use of the cuts till they are nearly worn away. This piece is shown at K, and is provided with a beveled slot` M, to allow it to engage with the key L, and is also provided with a similar key corresponding in position. In Fig. l, one end is shown with the gib in place and the use with short or worn cuts. Through the edge of the hammer or pole is an eye, N, for the reception ofthe handle. The usual mode is to have the eye pass through the pole parallel to the cut-holding slots; but by passing through the edge or at right angles to the said slot s any side strain that may be exerted on the cuts is withstood by thejaws and not by the force ofthe clamping, as is the case in the ordinarypole.

In large bush-hammers the jaws are held by more than one bolt.

Having described the device, what I claim 1s- 1. A bush-hammer having its pole provided with movablejaws, each ot' the said jaws having at one end a shoulder which bears on the cuts or picks, and being gradually thickened from the shoulder toward the other end, substantially as and for the purpose speeitied.

2. A bushhammer having tspole provided with movable jaws, each ot' the said jaws having at one end a shoulder which bears on the cuts or picks, and being gradually thickened said thickened port-ion having passed ,through it the beveled portion Aof the securing and clamping bolt or bolts, substantially as and for the purpose specified.

3. In combination with a bush-hammer having a pole provided with clamping-jaws, a gib other end with it removed, thus showing its.

from the shoulder toward the other end, the- IOC) having a recess on one side for receiving theA by bolts, with the portions passing through the lug or key on pole, and provided on its other jaws beveled, a removable gib provided with side with a lug or key, the said gib resting be- :t lug and a reeess, and a ller provided with hind the butts of the cuts or picks, substanai lug fitting in aslot in the ja-ws, the said pole 5 tially as and for the purpose set forth. having 2i lug at the rear of the eut-retaining 2o 4. In combination with thejznvs of :t bushrecess, and being provided Centrally With inn hammer pole, the said jaws being slotted on eye for the handle7 the entire deviee operzittheir bearing-surfaces, a ller resting between ing substantially as and for the purpose set the jaws and the cuts, and provided with :L forth.

Io lng on its surface to engage in the slot in the In testimony whereof I affix my signature in 25 jaw, Which lug prevents the filler from slippresence of two witnesses. ping, substantially as und for the purpose set VESLEY H. HARPER. forth. Vitnesses:

5. A bush-hammer having a pole provided GEO. G. BLUMER, 15 withmovableshoulderedjztwsretainedin place JAMEs B. DnsHLER.

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