Handle-Fastener Page: 3 of 5
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UNITED STATESPATENT OFFICE.
EUGENE C. McMILLAN, OF LAREDO, TEXAS.
HANDLE-FASTENER.Specification of letters Patent. Patented Feb. 4,1913.
Application filed January 19, 1912. Serial No. 672,083.To all whom it may concern:
Be it known that I, EUGENE C. McMrL-.
LAN, a citizen of the United States, resid-
ing at Laredo, in the county of Webb and
5 State of Texas, have invented new and use-
ful Improvements in Handle-Fasteners, of
which the following is a specification.
This invention relates to tools, particu-
larly those in the form of removable bits,
10 such as screw drivers, chisels, gimlets and
augers, and has for its object to provide an
efficient means for holding the bit members
in a stock element, which means will be
simple and cheap as well as durable and
15 strong, and which will allow rapid change
of bits without manipulation of gripping
devices.
A further object is to provide a stock ele-
ment suitable for use with braces of usual
20 construction and which may be substituted
for the ordinary bit, in the original stock of
the brace, so that my rapid change device
may be used in conjunction with the ordi-
nary brace.
25 Another object is to present a construction
whereby a bit loosely fitting the socket of
my stock will upon.use become seated firmly
against lost motion or play.
Other objects and advantages will be ap-
30 parent from the following description, and
from the drawings, in which,
Figure 1 is a side view of my stock ele-
ment with a screw driver engaged therein,
Fig. 2 is a longitudinal sectional view there-
35 of, Fig. 3 is a cross section thereof, Fig. 4,
is an end view, Fig. 5, is a perspective view
of one of the catches, Fig. 6 is a longitudi-
nal sectional view showing the use of me-
chanical means for releasing a bit from the
40 stock, Fig. 7 is a section on line 7-7 of Fig.
6, Fig. $ is a perspective view of the ring
shown in Fig. 6, Fig. 9 is a side view of a
hand operated device constructed in accord-
ance with my invention.
45 There is illustrated a bit-stock 10 includ-
ing the usual rectangular tapered head 11
adapted to be engaged by the usual grip-
ping devices of braces and the like, the at-
tenuated shank 12, and the hollow or sock-
50 eted head 13, in which is detachably en-
gaged the screwdriver bit 14.
The head 13 is considerably elongated,
and is substantially in the form of a sleeve.It is oblong and rectangular in cross sec-
tion and the shank portion 15 of the bit 14 55
fits loosely and slidably therein. The bit
has also a head portion 16, the line of di-
vision being marked by the enlargement 17
forming a rib around the bit. The shank
is somewhat less in length than the longi- 60
tudinal depth of the socket 18 of the head 13
and thus the enlargement is allowed to seat
against the outer end of the socket. The
sides of the enlargement being inclined
gradually from the plane surface of the 65
shank and at an increasing angle, the bit
naturally adjusts itself centrally of the
socket without loose movement, when pressed
inwardly.
A short distance from the inner end of 70
the bit, notches or grooves 20 are formed on
opposite sides thereof having sloping sides
toward each end of the bit. Carried by the
stock there are opposed spring catches 21
adapted to snap into the notches 20 when 75
the bit is forced into the stock, whereby the
bit is held releasably but securely in opera-
tive position. In the case of. a screw driver
the notch above described may be employed,
which allows the bit to be drawn out in the 80
same -way it is engaged in the stock but in
the case of an auger bit or other device
which might tend to pull from the stock in
use, it would be desirable to have the inner
side of the notch not inclined but over 85
hung, as at 20a in Fig. 6. The catches 21
as shown are formed in a very simple man-
ner, comprising each but a single piece of
spring steel ribbon, one end of which is pro-
jected outwardly through an aperture 22 in 90
the stock sleeve, being bifurcated and hav-
ing one furcation bent toward the outer end
of the stock, and the other furcation turned
toward the inner end of the socket. The
spring extends from this opening 22 longi- 95
tudinally inward closely against the inner sur-
face of the sleeve for a short distance, being
then gradually curved outward to a suit-
able distance as at 23 to engage forcibly
against the bit when forced inwardly 100
thereagainst. The inner end portion of the
spring is then bent abruptly outward at 24,
extending at right angles to the axis of the
stock, and through a suitable opening 25,
above which the extremity of the spring is 105
turned laterally to form a lip 26 under which1,052,077.
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McMillan, Eugene C. Handle-Fastener, patent, February 4, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth513679/m1/3/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.