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In
Figs.3 and 4 the friction-slide is provided with a downwardly-extending
lug 11, having a screw-threaded hole, and mounted in suitable
bearings on the under side of the frog is an adjusting screw
12, the threaded end of which enters the threaded hole in the
lug 11. The screw 12 is left free to revolve in its bearings,
but held against longitudinal movement therein by means of shoulders
in the ordinary manner of mounting similar screws. I have shown
two different devices for moving the slide to indicate the other
operating devices may be substituted for the lever 8.
By turning the screw or moving the lever or other operating
device the slide 7 may be moved longitudinally in its ways or
guides, so as to carry it transversely to the length of the
cutting-bit. I prefer to roughen the upper surface or a portion
of the upper surface of the slide 7 to increase its frictional
contact with the cutting-bit. In use with either form the cutting-bit
is merely seated in place and clamped in the ordinary manner,
with its under face at the upper end resting upon the frictional
slide 7 without any connection with said cutting-bit other than
frictional contact. By moving said frictional slide with any
suitable operating mechanism the upper end of the cutting-bit
may be moved laterally in either direction. By thus moving the
bit with a frictional slide it is not necessary to make any
provision for wear of the cutter or to provide any special devices
for connecting it with the slide or to pay any attention to
the arrangements of the slot. It may therefore be used with
any ordinary cutting-bit, either slotted or not slotted.
I claim as my invention —
In a bench-plane, the friction-slide 7 arranged to move transversely
under the upper end of the cutting-bit, and provided with the
operating mechanism, substantially as described, and for the
purpose specified.
GEORGE
KARRMANN.
Witnesses:
S. FRISBIE,
W.W. WOODFORD.
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