IMPROVEMENTS IN MACHINERY FOR CUTTING NUTS, SCREWS, AND PIECES OF POLYGONAL SHAPE
Year: 1856

page_text: PROVISIONAL SPECIFICATION left by Charles Fréderic Vasserot at the
Office of the Commissioners of Patents, with his Petition, on the
5th August 1856.-A communication.
I, CHARLES FREDERIC VASSEROT, of the firm, Wells and Vasserot, of 45,
Essex Street, Strand, London, Patent Agents, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN MACHINERY FOR CUTTING NUTS,
SCREWS, AND PIECES OF POLYGONAL SHAPE," (a communication from Nicolas
Marchal and Auguste Oger, of Epernay, in the Empire of France,) to be as
follows; and consists in cutting all the sides of several nuts or regular
polygonal pieces at the same time; also of tapping or worming the nuts and
cutting the screws on bolts or pins in the same machine.
The frame of this machine supports the several working parts, and on which
is mounted a plate. This plate has on its surface six small spindles (sup-
posing the machine to be made for a hexagon uut or piece), and on which are
fixed the working tools, which in their rotation take away the parts which are
presented to it. On these said spindles are fixed small bevelled wheels, gearing
into a crown wheel, receiving its motion from another pinion fixed to the
driving shaft.
In the centre of the frame is placed a vertical shaft, receiving a screw, bolt,
or rod, which bears the nuts to be cut, and which may be placed one upon the
other. This vertical shaft receives an ascending motion by means of a lever,
endless screws, & cog wheels, in communication with the said driving shaft.

page_text: Above the frame, and supported by uprights fixed to the said frame, is a
cross bar with four.branches or arms, having a socket in its centre. This
socket bears another socket fixed by screws, in which passes another rod,
hollow at its end, to receive the before-mentioned screw, bolt, or rod, bearing
the nuts to be cut, and keep them always perfectly in the centre, notwith-
standing the efforts of the cutting tools. This cross bar is hinged, so that it
may be lifted for the purpose of changing the nuts, &c.
The frame is prolonged horizontally, not only in reason of the main shaft,
but also for utilizing the said main shaft, in the following manner :-When the
machine is not employed in nut cutting, it may be used for turning the screws,
as with an ordinary screw mandrel lathe, by fixing on the end of the said main
shaft a chuck or mandrel; the frame having the necessary slide; it will how-
ever be necessary to ungear the nut cutting part of the machine, which can be
done in various well-known ways. On the said vertical shaft, placed in the
centre of the frame, is fixed a bevelled wheel, in which gears a, pinion fixed
on another horizontal shaft, for the purpose of giving to the said vertical shaft
a circular motion, and on which shaft are fixed the nuts to be tapped or
wormed. The screw tap is placed in another frame above the nuts, so that
when the nuts receive a circular motion it causes the tap to descend & form
the screw or worm.
So as to render this machine for cutting nuts useful to small manufacturers,
another way may be employed, which will do the work quite as well as the
precedent, but not so quick. On the before-mentioned driving shaft, & where
the screws may be turned, is mounted a mandrel, having on its surface a
number of cutting tools. The before-mentioned slide has fixed upon it two
moveable brackets acting on an axle behind; in those brackets pass a shaft
wormed at one extremity to the size of the nut to be cut, & on the other
extremity a divisor, according to the number of sides of the nut.
The slide in
its course shall bring the nut or the piece to be cut before the tools. This
machino may be adapted on any lathe where there is a slide.