cap-iron is made to serve as a clamp by its lower edge, resting
upon the cutting-iron near its lower end, passing under the
flanges on the arms, which serve as fulcrums, and by being raised
from the cutting-iron near the upper end by means of the clamp-screw,
the lower end of which takes against the face of the iron. It
serves the purpose of the ordinary cap-iron, when desired, and
at the same time can be readily slipped back, leaving the plane
in the form known as "single-iron" planes.
One peculiar and important feature of our invention consists
of the combination of cap-iron and clamp, so arranged that the
relative positions of the cutting-edge of the iron and the front
edge of the clamp are not changed when the iron is adjusted
to fix the thickness of shaving to be cut by the plane. The
smoothness of the surface left after removing a shaving is determined
by this relative position of the cutting-edge of iron and edge
of cap-iron, and once fixed in our device it remains constant,
as described, while the thickness of the shaving may be varied
by the adjustment of the carriage. This construction of parts
is a great saving in expense over the ordinary method of arranging
and combining the cutting-iron and the cap-iron, and possesses
the further advantage of simplicity and ready adjustment to
The thickness of the shaving made by the plane is adjusted by
means of the screw-spindle, which has a suitable head for operating
with the thumb and finger.
In order to enable the tubular projection to slide readily,
or to rock in the socket d1, we slab off, as seen in
Fig. 3, portions of its upper surface, to decrease the bearing-surface
within the socket. This, however, is not essential to the perfect
operation of our device, as the carriage may have a downward
projection resting in a guide-groove in the plane-body, or be
adapted to rock in many ways obvious to the skilled mechanic
on slight inspection or our device.
We claim as our invention —
- In combination, a plane-body having a socket, and
the carriage having a longitudinal reciprocation and
also a transverse rocking motion in said socket, with
means for adjusting said carriage, all substantially
- In combination, the plane-body, the carriage having
longitudinal motion and also a transverse rocking
motion, and bearing the plane-iron and combined cap-iron
and clamp, all substantially as described.
- In combination with a plane-body and a carriage,
substantially as hereinbefore described, the plane-iron
and combined cap-iron and clamp, made in one piece,
the relative position of the two latter parts remaining
unchanged when the plane-iron is adjusted to determine
the depth of cut of the iron, all substantially described.
ARTHUR E. RUST.
A. C. TANNER,
WM. H. MARSH.