The accompanying cuts represent Amidon's corner brace and show
the applications in which this tool is particularly useful.
Wiremen will appreciate the features of this brace. The Amidon
Tool Corporation, of Buffalo, N.Y., its manufacturer, claims
that this brace bores fully 10 to 20 times as fast as the
ratchet brace, as the movement is round and round.
It bores also very much easier, for two reasons: It is easier to
turn round and round than back and forth, and the pressure
coming on the arm of the brace instead of the sweep itself more
power is gained. For heavy work or boring into hard wood, but
especially for boring overhead, which is very severe work,
either in a corner or in the clear, the superiority of the
corner brace is apparent in the advantage gained by the pressure
on the arm.
In boring in the wall at the floor this advantage is highly
appreciable as the foot can be used against the arm with good
effect. The corner brace, however, is not confined to work in
the corner or against a wall, but owing to the advantage just
mentioned in the arm it will do much easier and just as good
work in the clear as an ordinary brace.
It will bore close into a corner; the ratchet brace, owing to
the head, will not bore a straight hole within an inch and a
half of the corner. In removing the bit and clearing the hole
time is also saved, as the ratchet brace must be worked back and
forth, as in boring. In hardwood boring, the bit is often
loosened from the ratchet brace in the backward movement which
cannot be the case, with the corner brace.
With the corner brace, a straighter hole can be bored than with
any other brace, as the eye is easily guided by the straight
rod, at the end of which the bit is held. The corner brace will
not cripple by springing (bending) the sweep from, heavy work,
as the pressure, being on the arm, bears directly down upon the
bit and not on the sweep.