Bit Braces


Charles H. Amidon - Inventor and Toolmaker

Amidon's Corner Brace - Electrical Review, Vol. 32, June 2, 1893, (London, UK: H. Alabaster, Gate House & Co.)


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.

wk, 10/2017

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Bit Braces


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