Every trade has some special
annoyance or vexation appertaining to it which tries the temper
and delays the workman and we are sure that many can bear
witness to one trial carpenters and joiners have to bear; that
is, when withdrawing a bit from a hole just bored, to have it
part company with the brace and fall out.
This does not matter
much where there is but one hole to be made, but
when there are many the evil is a serious one.
The reader will see in this
engraving a remedy for it.
The shank of the
brace is provided with a screw thread, A, and nut,
B. This nut, when screwed up, forces a jaw, C, up to
the protruding end of the bit, and also against the
body of it below, so that it is firmly held in place
beyond the possibility of accidental detachment.
Besides the sense of
security thus given, the bit bores better and
straighter. Sometimes the shanks of the bits do not
fit the squared socket in the brace, and they wobble
about. With this fastening any bit can be securely
Patented through the
Scientific American Patent Agency on Jan. 16, 1866,
by J. P. Gordon, whom address at West Garland, Me.,
for further information.
Patent 52,042 - 01/16/1866: Improvement for
Bit-holders for Brace by J. Parker Gordon