The Smith & Egge Manufacturing
Company, of Bridgeport, Conn., are offering an improved form of
bit-brace, also a socket-wrench, the two embodying a common
principle which possesses interest for our readers. The general
appearance of these tools is clearly shown in Figs. 10 and 12,
while sections showing their construction are given in Figs. 11
The design of the manufacturers has
been to produce something cheap in construction and at the same
time effective for use. The clutch is formed by splitting the
shank of the tool and placing between the two parts a
thumb-wheel, the two ends of the spindle of which ere provided
with right and left threads.
By this simple device the jaw of
the clutch is very rapidly opened or shut, according to the
direction in which the thumb-wheel is turned.
The application of this principle
to the brace and socket-wrench is essentially the same, there
being only a slight difference in detail, as may be seen by
comparing Fig 11 with Fig. 13.
The recess in the clutch of the
brace for grasping a bit is made in such a form as to take in
the square shank, the clutch shutting down over the round part
of the bit, thus making it secure in its position without
liability of dropping out, even though the screw is not closed
The thumb-wheel of the clutch in
the brace may be operated by bringing it in contact with the
bench, thus enabling a mechanic to fasten the bit in position or
withdraw it from the brace with ease and dispatch.