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UNITED STATES PATENT OFFICE.
______________________________
 THOMAS J. FEGLEY AND GEORGE G. LEOPOLD, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO NORTH BROS. M'F'G Co., OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.
 

MEANS FOR ATTACHING BLADES OF TOOLS TO HANDLES.
______________________________ 
1,041,451.      Specificaton of Letters Patent.       Patented Oct.15,1912.
 Application filed February 28, 1910. Serial No. 546,372.

 
 

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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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