AN IMPROVED MACHINE FOR CUTTING CONICAL WHEELS
Year: 1875

page_text: LETTERS PATENT to Cord Eduard Johannes Grube, of Steindamm,
in the City of Hamburg, for the Invention of "AN IMPROVED
MACHINE FOR CUTTING CONICAL WHEELS.”
Sealed the 11th January 1876, and dated the 12th July 1875.
PROVISIONAL SPECIFICATION left by the said Cord Eduard Johannes
Grube at the Office of the Commissioners of Patents, with his
Petition, on the 12th July 1875.
I, CORD EDUARD JOHANNES GRUBE, of Steindamm, in the City of
Hamburg, do hereby declare the nature of the said Invention for "Ax
IMPROVED MACHINE FOR CUTTING CONICAL WHEELS," to be as follows :—
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This Invention relates to an improved machine for cutting conical
wheels, and consists of an arrangement of appliances by which I am
enabled to out the spaces of conical wheels by one cutter, and that
without turning the tool after one side is cut for cutting the other side,
as is commonly done. To attain this purpose my cutter is arranged in
a frame and makes a sideways motion horizontal to the surface of the

page_text: cone. All the motions of the cutter of my machine are transmitted
from one pinion driven by motive power, either steam or hand.
To determine the inclination of the cutter for the exact angle of the
cone to be cut the part of my machine which bears the cutter can be
turned round a bolt or arm, and the angle can be read from a scale on i
a radius plate.
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The wheel which is to be cut is dropped on a centre pin or axle, and
secured thereon, the axle and wheel being turned round and then
secured in the exact position corresponding with the pitch by means of
a gauge disc or distance piece.
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SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Cord Eduard Johannes Grube in the Great Seal
Patent Office on the 12th January 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CORD
EDUARD JOHANNES GRUBE, of Steindamm, in the City of Hamburg, 1
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of July, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc- 2
cessors, give and grant unto me, the said Cord Eduard Johannes
Grube, Her special license that I, the said Cord Eduard Johannes
Grube, my executors, administrators, and assigns, or such others as
I, the said Cord Eduard Johannes Grube, my executors, administrators,
and assigns, should at any time agree with, and no others, from time 2
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "Ax IMPROVED MACHINE FOR CUTTING
CONICAL WHEELS," upon the condition (amongst others) that I, the said 8
Cord Eduard Johannes Grube, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said

page_text: Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Cord Eduard Johannes Grube,
do hereby declare the nature of my said Invention, and in what
manner the same is to be performed, to be particularly described
and ascertained in and by the following statement thereof, that is to
say:-
This Invention relates to a machine for cutting conical wheels of
any material in such a manner that the cutting tool completely and
automatically finishes the grooves. Models of wood or metal can also
be made on this machine.
My Invention is clearly represented in the annexed Sheet of
Drawings.
Figure 1 represents a side view; Figure 2, a section; and Figure 3
à ground plan of my machine.
On the arm a is placed the moveable part R, which carries at o the
axle of the cutting tool, and which can be moved forward and backward
by means of the screw b. During the operation of cutting the feed is
self acting. The arm a is connected with the part c by means of ball
joints, and can be turned on the axle d by the screw r, which is placed
in bearings on the support P. The screw allows of bringing the arm c,
and with it the cutting tool, into any angle desired according to the
form of the wheel to be cut. A radius scale may be attached for the
direct reading of the angle required. The support P rests on the bed h,
and can be moved either way by means of a screw.
The motion is communicated to my machine through a fast pulley
(the same shaft having also a loose pulley) on the shaft e.
By means of gear the shaft g is moved, and through chain trans-
mission the cutting tool.
By means of a conical wheel fastened on the shaft e (Figure 3) a
sideway motion is applied to the axle of the cutting tool. The extent
of this side motion, which decides the shape and conicalness of the teeth,
can be regulated by shortening or lengthening the connecting rod k.

page_text: The wheel or model (pattern) which has to be cut is fastened on a
vertical iron pin, which is placed in a bearing that can be turned by
a worm wheel from an endless screw.
Spur wheels can also be cut on my machine when the conical gear
is brought out of motion and the sliding part 1 set fast. The arm c
must at the same time be brought into vertical direction.
Worm wheels can likewise be cut on my machine by bringing the
cutting tool in the required slanting position, and by working it either
upwards and downwards or forward and backward.
Having thus described the nature of the said Invention, and in what 1
manner the same is to be performed, I declare that I claim, the Inven-
tion as herein-before described, in which a sideway motion can be given
to the cutting tool during the self-acting feed of the same for the
purpose of cutting the grooves of conical wheels as represented in the
annexed Drawings.
Tab
annexed Drawings.
In witness whereof, I, the said Cord Eduard Johannes Grube,
have hereunto set my hand and seal, this Seventh day of
January, One thousand eight hundred and seventy-six.
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