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UNITED STATES PATENT OFFICE
GEORGE E. FRANKLIN, OF NATICK, MASSACHUSETTS
IMPROVEMENT IN SURFACING-PLANES.
Specification forming part of Letters Patent No. 138,625,
dated May 6, 1873; application filed March 8, 1873.
To all whom it may concern:
Be it known that I, GEORGE E. FRANKLIN, of Natick, in the
county of Middlesex and State of Massachusetts, have invented
an Improvement in Surfacing-Planes; and I do hereby declare
that the following, taken in connection with the drawing which
accompanies and forms part of this specification, is a description
of my invention sufficient to enable skilled in the art to
practice it.
In
using dies for punching or cutting shoe soles and uppers,
and other stock, it is customary to use blocks of wood with
the end of the grain uppermost, the top surface being faced
off for smoothness. As such a block becomes too much worn
for practical use, it is cut down with an adz to a plane below
the lowest depression worn by the die, and is then surfaced
off with a smoothing-plane. This method of surfacing a block
is very slow and laborious, and does not result in procuring
a uniform face.
My
invention has reference to a method of surfacing such a block
by means of a plane alone; and for this purpose I make a plane
having a straight bottom face and a straight side face, and
projecting through said adjacent faces, and adjacent to the
angle of such faces, two cutters or cutting-edges, one edge
being and cutting horizontally, and the other being vertical
and cutting vertically, the cutting-edges being in the same
vertical plane, right-angular to the side face of the tool,
this side face having a gage to regulate the depth of cut
of both cutters or bits. This plane is used by beginning at
one side of the block and setting the gage to the depth to
be cut, in order to reach the deepest depressions, and resting
the gage upon the top of the block, while the horizontal cutter
joints or cuts across the grain, and smooths the top surface
of the block, the plane being thus used until the block is
planed across its whole face. It is in this construction of
the surfacing-plane that my invention primarily consists.
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