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MEANS FOR ATTACHING BLADES OF TOOLS TO HANDLES. ______________________________ |
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To all whom it may concern:
Be it known that we, THOMAS J. FEGLEY and GEORGE 0. LEOPOLD, citizens of the United States, residing in Philadelphia, Pennsylvania, have invented certain Im- provements in Means for Attaching Blades of Tools to Handles, of which the following is a specification. The object of our invention is to so con- struct a screw driver that the shank of the tool will be rigidly secured to the handle. This object we attain in the following man- ner, reference being had to the accompany- ing drawings, in which,- Figure 1, is a side view of a screw driver partly in section, illustrating our invention; Fig.2, is a transverse sectional view on the line 2--2 Fig 1; Fig. 3 is a transverse sectional view on the line 3--3 Fig. 1; Fig.4, is a transverse sectional view on the line 4--4 Fig. 1, Fig. 5 is an enlarged view of a part of Fig. 1, Fig. 6, is a detached per- spective view of the blade of the screw driver, Fig. 7, is a detached perspective view of the plug which carries the blade; and Fig. 8, is a perspective view showing the shank of the blade mounted in the plug. A is the blade of the screw driver having notched portion a at one end; The surface a' of this notched portion is beveled, as shown in the enlarged view Fig. 5, so as to fit tightly against the beveled portion b' of the plug B. This plug is shaped as clearly shown in Fig. 7 and has an enlarged head b which forms part of the ferrule of the tool. The shank of the blade A is recessed at a2, and the metal of the plug is driven into the recessed portion as illustrated at c Fig. 5, locking the blade permanently to the plug. The blade is first driven tightly into the plug, so that the beveled surfaces a' and b' hold the two parts firmly together; and then the metal of the plug is forced into the recess a2. Thus the shank is prevented from turning in the plug, owing to the contact of the two flat surfaces a' and b' and it can- not move longitudinally owing to the metal of the plug being forced into the recess, as shown. The plug is preferably made with a transverse slot as shown, the base of this |
slot forming the beveled portion b', as
shown. On the plug is a series of longitudinal ribs e, and these ribs are formed in the pres- ent instance by squeezing the metal of the plug between two dies which are less in di- ameter than the diameter of the plug, caus- ing the metal to be cut and forced into the position shown in Fig. 2. These ribs may extend the full length of the plug or may be arranged at intervals, as desired; the purpose is to prevent the plug from turning in the handle. D is the handle having a cavity d into which the plug is driven; the ribs forming channels in the walls of the cavity as the plug is driven, so that after the plug is once in position it cannot turn in the handle. The handle is preferably provided with a ferrule d' which is forced on to the end of the handle in the above manner. By the above construction the plug is per- manently secured to the blade by indenting the plug back of the head and when the plug is driven into the handle, the ribs of the plug cut their way into the body of the handle; preventing the handle from turning on the plug. The handle extends over the depressed portion c of the plug, making a neat and substantial screw driver. When the invention is used as a chisel or a gouge, the head of the plug takes the thrust of the handle, while the notched end of the blade takes the thrust of the plug. It will be understood that while we have shown the blade in the form of a screw driver, the invention may be used in secur- ing blades of other tools to handles, with- out departing from the essential features of the invention. We claim:- The combination of a blade having a notched and tapered end and having a re- cess some distance from the notch; a han- dle having a cavity therein and provided with a ferrule; a plng having a head at the outer end and having longitudinal ribs pro- jecting from its body and having a seat formed by slotting the plug transversely; said seat being beveled for the reception of the beveled end of the blade; the portion |
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