IMPROVE- MENTS IN MEANS OR APPARATUS EMPLOYED IN DRILLING, SURFACING, CUTTING, AND ORNAMENTING METAL, WOOD, AND OTHER SUBSTANCES
Year: 1867

page_text: PROVISIONAL SPECIFICATION left by Frank Branscombe at the Office of
the Commissioners of Patents, with his Petition, on the 27th September
1867.
I, FRANK BRANSCOMBE, of Brewer Street, Museum Street, in the County
of Middlesex, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN MEANS OR APPARATUS EMPLOYED IN DRILLING, SURFACING, CUTTING, AND
ORNAMENTING METAL, WOOD, AND OTHER SUBSTANCES," to be as follows:-
The Invention has for its object improvements in means or apparatus
employed in drilling, surfacing, cutting and ornamenting metal, wood, and
other substances. For this purpose I employ revolving cutters of forms
suitable to the work to be produced, such cutters being mounted upon an
axis to which rotary motion is given in any suitable manner as is well under-
stood. The material to be operated upon I fix in any suitable manner to a table
or holder which is mounted upon a pin carried by a slide which is capable of
being worked to and fro upon suitable guides by a screw in a similar manner
to the slide rest of a lathe, such guides being carried by a circular plate, on the
periphery of which are formed teeth into which a suitable screw takes, and by
which rotary motion may be communicated to such circular plate. The screw
above mentioned is also carried by a slide working upon suitable guides as
before described with reference to the first-mentioned slide. To the last-
mentioned slide is fixed a bar or rod provided with a suitable groove, in which
moves a stud or projection from a suitable rod or bar carried by the table

page_text: or holder to which the material to be operated upon is fixed. The last-
mentioned guides are fixed to a plate which is capable of being turned into
any desired position, and the edge or surface of which is provided with
suitable marks or divisions to enable it to be turned to any desired angle. If
desired the guides and circular plate may also be provided with suitable marks
or divisions to enable the amount of motion given to the various parts to be
accurately adjusted. If desired the plate carrying the last-mentioned guides
may also be carried by the spindle of a lathe, in which case the bar or rod
having a suitable groove formed therein is fixed to the lathe head or framing.
By these means the cutters may be caused to act in any desired position, and
various combinations of ornamental or other forms may be readily produced.
Or instead of fixing the material to be operated upon to the table or holder
above described such table or holder may carry the shaft or axis to which the
cutters are fixed and the material to be operated upon may be a fixture upon
a suitable table the cutters being then caused by the means before described
to traverse over the material to be operated upon. In order to give a self-
acting motion to the screw acting upon the circular plate I fix to the axis of
such screw a pulley which may be driven by a strap or band from any
suitable axis. When it is desired to produce true ellipses or ovals the cutter
is mounted upon a slide working in guides carried by an axis to which rotary
motion is given in any suitable manner, such slide being controlled to move in
the desired path by being connected by pin joint to a link pin-jointed to
another link, which is at its further end pin-jointed to a fixed centre of motion.
The amount of eccentricity desired in the path of the cutter slide is governed
by a screw forcing the slide to any desired distance from its axis of motion,
the frame carrying the cutter slide being caused to move to and fro on suitable
guides.