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The
dies or plates E E are made of hardened steel, with one corner
of either end beveled off, so that when placed together they
form a notch coming to a fine point, the shape of the point
of a saw-tooth, this beveled notch coming next to the beveled
face of the stock A. These dies or plates swage and sharpen
the tooth when driven upon it.
The liners F are small thin strips of steel or iron, and are
placed under the collar B about the dies or plates E. The position
of the dies upon the beveled part of the stock A can be regulated
by putting in or taking out said liners, and the depth to which
the teeth of the saw require to be swaged and sharpened is thereby
varied. Thus, if the teeth require to be swaged or sharpened
to a considerable depth, these liners are taken out and the
dies or plates moved up on the beveled face of the stock, while
if very little is desired the liners are put in and the dies
or plates moved down.
G represents a key or wedge for the purpose of holding the collar
in place and enabling it to be readily removed for changing
the dies or plates and liners.
The operation of the device is as follows:
Set the instrument upon the saw so that the point of the tooth
shall enter the lower notch of the dies or plates. Then press
down the lever C so that the lower part presses against the
saw-plate, thus holding it firmly against the stock. Then strike
the stock upon the top a blow with a hammer, when the tooth
will be swaged and sharpened.
Having thus fully described my invention, what I claim as new,
and desire to secure my Letters Patent, is—
The combination, with the stock A, holder B, and intermediate
dies or plates E E, of the clamping-lever C and spring D, substantially
as and for the purpose herein shown and described.
JASPER CLARK.
Witnesses:
E. M. DUNHAM,
W. A. MASON
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