IMPROVE- MENTS IN MACHINERY FOR CUTTING, SHAPING, AND ORNAMENTING WOOD, IVORY, OR OTHER MATERIALS
Year: 1864

page_text: PROVISIONAL SPECIFICATION left by Thomas Shannon Martin at the
Office of the Commissioners of Patents, with his Petition, on the 8th
April 1864. A communication from abroad by William Whitney, of
Winchendon, Massachusetts, United States of America.
I, THOMAS SHANNON MARTIN, of North Wall, in the City of Dublin,
Merchant, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN MACHINERY FOR CUTTING, SHAPING, AND ORNAMENTING WOOD, IVORY, OR
OTHER MATERIALS," communicated to me from abroad by William Whitney,
of Winchendon, Massachusetts, United States of America, to be as
follows:-
In a machine constructed according to these improvements a sectional guide
or pattern is employed, and a roughing cutter and steadiers; also triangular
or otherwise formed shaping cutters fixed to rising and falling holders fitted
with adjustable holders; likewise finishing cutters in one or more pieces are
employed attached to an adjustable, oblique, or diagonal plate on a rising and
falling frame.
In the general framework are mounted a fixed head and a moveable head
and a slide rest carrying roughing and shaping cutters with their holders and
steadiers. The roughing cutter and steadiers are moved to and fro by a right
and left-handed screw. The leading screw is brought into gear with the slide
rest by half nuts worked by a weighted lever retained in position by a catch
on a disengaging lever, which is controlled by an adjustable stop. The leading
screw may be worked by a cone pulley driven by a pulley on the spindle.

page_text: Steel or other sliders move along the edge of a sectional guide, and raise and
depress the cutter holders and cutters, thereby preparing a form for the
finishing cutters. The cutters are adjusted for depth of cut by rods. The
sectional guide or pattern is a longitudinal section of the article to be
produced, or exactly of the same outline as the article, and also as the finishing
cutter; it is preferably made of saw plate or steel plate, and is screwed
between two plates, one of which may be part of the general framework. The
finishing cutters may be made in pieces, so that by varying their combination
various patterns may be produced by a few pieces. The cutters are held in a
formed in a guide frame
frame sliding vertically in dovetail or other grooves
adjustable horizontally to regulate its distance from the substance on which
the cutter acts. One of the bars of the cutter frame is diagonal or oblique,
and to it is fixed an adjusting plate by two sets of screws working in opposite
directions. This plate carries the finishing cutter, which can thus have its
edge set to a desired angle by working one or other of the sets of screws. To
help to raise the cutter frame at the back motion of the slide rest, toothed
wheels gearing into racks may be used. A diagonal or oblique director is
fixed to the slide rest adjustably, and connected to the finishing cutter frame
by a tongue and groove to move the cutter up and down according as the slide
rest moves backward and forward. The substance to be cut having been screwed
up between the centres the rougbing cutter is advanced to a fixed point, and
the steadiers closed to reduce the substance to the size of the opening therein;
the weighted lever is then lifted into the catch of the disengaging lever,
causing the half nuts to embrace the leading screw, and the slide rest moves
forward, carrying the roughing and shaping cutter with it, at the same time
the finishing cutter descends. When the disengaging lever touches its stop
the weighted lever falls and disengages the half nuts from the leading screw,
and lifts the shaping cutters.