Disston saw swage. US patent # 130,484.
http://www.datamp.org/patents/displayPatent.php?pn=130484&id=7334
https://patentimages.storage.googleapis.com/1c/fe/be/a165fd33e11311/US130484.pdf
Specification describing an Improved Saw
Tooth Swage, invented by JoHN CONNOR, of
Philadelphia, Pennsylvania.
Improvement in Saw-Tooth Sacage.
The object of my invention is a saw-tooth
swage of a more economical and durable char
acter than those of the class to which my in
vention appertains. My improved swage con
sists of but two parts, namely, the block. A
of steel, and the band or ferrule B, one side
of the latter being removed in the perspec
tive view illustrated in the accompanying
drawing for the better demonstration of my
invention.
The block A is of proper shape and dimen
sions for being grasped by one hand of the
operator, and is suitably rounded at the outer
end for receiving the blows of the hammer in
the other hand of the operator. In the pres
ent instance two angular notches, a ca, are
formed in the swaging end of the instrument,
and two holes, bb, are drilled transversely
through the block, the metal intervening be
tween the bottom of each notch, and the ad
jacent hole being severed with a fine saw.
The slots thus formed, however, are tightly
closed on driving the tapering ferrule B onto
the tapering end of the block, and thus a
sharp, well-defined corner is always presented
where the two sides of each notch meet, for
acting on the extreme cutting-edge of a saw
tooth, the perfection of the swage depending
upon the perfection of the bottom of each
notch.
In saw-tooth swages of this class detachable
pieces are usually fitted to the swaging end for
the formation of the notch. I not only save
expense by dispensing with these pieces, which
demand accurate fitting, but, by making the
block A of one solid piece, in the manner de
scribed, increased solidity and durability are
imparted to the instrument.
It will be observed that one of the notches
has slightly rounded sides, which have the ef
fect of spreading the cutting-edges of a Saw
tooth, the other notch having straight sides for
imparting the proper straight edge to the tooth
after the latter has been spread.
I claim as my invention
A saw-tooth swage composed of a block, A,
notched, drilled, and slotted, and combined
With a tapering ferrule, B, all as set forth.
In testimony whereofI have signed my name
to this specification in the presence of two
subscribing witnesses.
Witnesses:
WM. A. STEEL
JOHN CONNOR,
JOHN K. R.UPERTUS.