IMPROVEMENTS IN MACHINERY FOR GRINDING, CRUSHING, AND PULVERIZING FLINT AND OTHER MATERIALS SPECIALLY APPLICABLE TO POTTERY MANUFACTURE ALSO SUITABLE FOR MIXING PURPOSES,
Year: 1882

page_text: LETTERS PATENT to John Goodwin of the Westwood Mills, Stoke-upon-Trent
in the County of Stafford, for an invention of." IMPROVEMENTS IN MACHINERY
FOR GRINDING, CRUSHING, AND PULVERIZING FLINT AND OTHER MATERIALS
SPECIALLY APPLICABLE TO POTTERY MANUFACTURE ALSO SUITABLE FOR MIXING
PURPOSES,"
PROVISIONAL SPECIFICATION left by the said John Goodwin at the Office
of the Commissioners of Patents on the 5th May 1882.
JOHN GOODWIN of the Westwood Mills Stoke upon Trent in the county of
Stafford "IMPROVEMENTS IN MACHINERY FOR GRINDING CRUSHING AND PULVERISING
FLINT AND OTHER MATERIALS SPECIALLY APPLICABLE TO POTTERY MANUFACTURE
ALSO SUITABLE FOR MIXING PURPOSES."
The object of these Improvements is to provide a Machine which shall be
specially applicable for grinding flint and other materials used in the manufacture
of Pottery Ware-which shall require a minimum power to drive it, and which
shall ensure the material so ground being free from iron or other extraneous
matter.
This object is attained by means of a roller of stone when used for grinding
materials for Pottery Ware (and of iron or other suitable material for other
purposes) which roller is keyed or staked on to a horizontal shaft, such shaft being
carried by ordinary bearings and left free to revolve therein.
This Roller is encased in a Cylindrical Casting when used for ordinary purposes
but which is paved or lined inside with stone or other suitable material when used
for Pottery Ware.
The outer case which is made of a larger internal diameter, and width than the
Roller, to allow space for the material to be ground being admitted between the
two is made to rest or hang its full weight upon the periphery of the internal
Roller. This outer case is turned up on the outside and driven from underneath
by a belt and thus caused to revolve when owing to its weight and friction it also
drives the internal Roller in the same direction and carries round the material to
be crushed or ground between itself and the roller before mentioned,

page_text: Owing to the rolling motion by which the grinding is produced it will be apparent
that friction and resistance are in this machine reduced enormously whilst the power
required for driving is also reduced to a minimum.
Although only herein before described as applied to grinding materials for the
manufacture of Pottery Ware it will be obvious that the same arrangement of
rollers is applicable for other grinding and pulverising purposes or for mixing
materials together.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Goodwin in the Great Seal Patent Office on the 4th November
1882.
JOHN GOODWIN of the Westwood Mills, Stoke upon Trent, in the County of
Stafford. "IMPROVEMENTS IN MACHINERY FOR GRINDING CRUSHING AND PULVERISING
FLINT AND OTHER MATERIALS, SPECIALLY APPLICABLE TO POTTERY MANUFACTURE,
ALSO SUITABLE FOR MIXING PURPOSES
"
The object of these improvements is to provide a machine which shall be
specially applicable for grinding flint and other materials used in the manufacture
of pottery-ware which shall require a minimum power to drive it, and which shall
ensure the material so ground being free from iron or other extraneous matter.
This object is attained by means of a roller of stone when used for grinding
materials for Pottery-ware (and of iron or other suitable material for other
purposes), which roller is keyed or staked on to a horizontal shaft, such shaft being
carried by ordinary bearings and left free to revolve therein.
This roller is encased in a cylindrical casting when used for ordinary purposes
but which is paved or lined inside with stone or other suitable material when used
for Pottery-ware.
The outer case which is made of a larger internal diameter and width than the
roller, to allow space for the material to be ground being admitted between the
two is made to rest or hang its full weight upon the periphery of the internal
roller. This outer case is turned up on the outside and driven from underneath by
a belt and thus caused to revolve when owing to its weight and friction it also
drives the internal roller in the same direction and carries round the material to be
crushed or ground between itself and the roller before mentioned.
And in order that this my said invention may be the more readily understood
and carried into practical effect I have hereunto annexed a drawing of a machine
embracing my improvements and I will now proceed to describe the same with the
assistance of the various Figures and letters of reference marked thereon. The
same letters of reference being used to denote similar parts in the several views.
Fig. 1 is a front sectional view and Fig. 2 a plan (partially broken off for want
of space to illustrate it in its entirety) of a machine suitable for grinding, crushing

page_text: or pulverising purposes constructed in accordance with my invention. Fig. 3 is a
transverse section of Fig. 1 with the roller removed and Fig. 4 is a transverse
section of the cylinder shewing the roller in position.
In all the views A is a cast iron roller which is keyed or staked on to the
horizontal shaft B which is carried in the ordinary plummer block bearings C and
is free to revolve therein. This iron roller is replaced by a stone roller when the
machine is used for grinding pottery-warc. D is a cylindrical casting (hereinafter
called the revolving cylinder) of larger internal diameter than the periphery of the
roller A and which may be a solid casting or be lined inside as illustrated with
segmental blocks E of stone, (when used for grinding materials for pottery ware)
iron or other suitable material and which segments are keyed and held securely in
position by means of the key or wedge E'. It will be observed that this revolving
cylinder D is arranged to enclose and to hang with its full weight upon the
periphery of the roller A and is of sufficiently large diameter to allow a space F
(see Figs. 1 and 4) for the material to be ground being admitted between it and
the roller A. Connected to the open sides of this revolving cylinder are a pair of
conical metallic frames G covered on the outside with perforated plates or wire-
mesh as seen separately in Fig. 5 and which act as revolving riddles for permitting
the ground material to fall into the annular troughs H which are supported by the
framework I-this framework forming also the ends of the machine and being
provided with hoppers J for the introduction of the material to be ground.
Suitable outlets K are also arranged at the bottom of the annular troughs H to
allow of the escape of the ground or pulverised material. The outside of the
revolving cylinder is turned up true, and revolving motion is communicated to the
cylinder by means of an endless strap or belt L passing round the cylinder and
driven from underneath as illustrated,
The action of this machine may be described as follows:-Revolving motion
being communicated through the endless strap or belt L to the cylinder D and its
full weight resting upon the roller A causes the latter to revolve in the same
direction-the material to be ground being now introduced through the hoppers J
and guided and directed by means of the plates J' on to the bottom of the
revolving cylinder D is then carried round with the cylinder, and thus compelled
to pass between such cylinder and the periphery of the roller A whereby it is
subjected to the desired pressure and so becomes ground or crushed-the pulverised
material being thus sufficiently reduced in size, then passes through the slots or
openings formed on the inner flange M of the conical framework into the conical
riddles G wherein it is again subjected to a revolving motion and if sufficiently
reduced in size escapes through the perforations into the annular troughs H and
from thence finally passes out of the machine through the outlets K. Owing to the
revolving motion by which the grinding is produced, it will be apparent that
friction and resistance are in this machine reduced enormously, whilst the power
required for driving it, is also reduced to a minimum.
Although only herein before described as applied to grinding machines, it will be
obvious that the same arrangement of revolving surfaces is equally applicable to
machines for mixing materials together.
Having thus particularly described and ascertained the nature of this my said
invention together with the best methods with which I am acquainted for carrying
the same into practical effect I wish it to be distinctly understood that I do not
confine myself to the precise details, relative proportions or dimensions of the
various parts of the improved mechanism for grinding, crushing, pulverising or
mixing materials hereinbefore described and illustrated on the accompanying
drawing as the same may be considerably varied without departing from the
invention but what I claim in the construction of such machines is.
1st. Mounting a cylinder upon the periphery of a roller and causing the saine to
revolve together substantially as and for the purposes herein before described and
illustrated on the accompanying drawing.
2nd. The combination and arrangement of mechanism for grinding, crushing,

page_text: pulverising or mixing purposes substantially as herein before described and illus-
trated on the accompanying drawing.
3rd. Constructing a grinding cylinder, with a segmental lining of iron, stone, or
other suitable material substantially as and for the purposes hereinbefore described
and illustrated on the accompanying drawing.
In witness whereof I the said John Goodwin have hereunto set my hand and
seal this second day of November in the year of our Lord, One Thousand
Eight hundred and Eighty two.