IMPROVEMENTS IN MACHINES OR MILLS FOR GRINDING PIGMENTS, PAINT AND., SIMILAR MATERIALS
Year: 1884

page_text: DICURICATION,
I, GEORGE JAMES BASELEY, of Queen Victoria Street, London, in the County
of Middlesex, Engineer, do hereby declare the nature of said Invention for
"IMPROVEMENTS IN MACHINES OR MILLS FOR GRINDING PIGMENTS, PAINT AND.,
SIMILAR MATERIALS" to be as follows:-
.)
My Invention relates to machines or mills for grinding pigments, or paints and
similar materials.
..
Heretofore in grinding pigments, paints or the like it has generally been found
necessary to pass the same through the mill twice.
The object of my Invention is to construct a mill in such a manner that after
having once passed through the same it will have been sufficiently ground. To
this end my said Invention comprises the novel construction and arrangement of
parts as hereinafter described.
In carrying my said Invention into practice I provide six rollers which are
preferably of granite mounted on iron or steel axles.
The said rollers are arranged in two sets of three each, the axles of each set
being in the same plane. The two sets of rollers are however inclined in opposite
directions in such a manner that the inner and upper roller of one set is over or
above the inner and upper roller of the other set.
The rollers of each set are preferably geared together in such a manner that the
rollers adjacent to each other run at differential speeds, thereby causing a rubbing
action between the said rollers. If desired both sets of rollers may be geared
together so that they can be driven from one driving pulley.
The centre roller of each set has a lateral movement imparted to it for this
purpose each of the said central rollers is made somewhat shorter than the distance
between its bearings. Upon the shaft outside the frame is keyed a cylindrical
cam having a diagonal groove in its face. Attached to the frame adjacent to the
said cam is a bracket carrying a stud or projection adapted to enter the said groove.
As the roller is rotated by its gear wheel the cam is caused to move in contact
with the pin or stud, thereby moving the roller with the said cam.
In order to prevent the said gear wheel from partaking of the movement of its
shaft the latter is provided with a feather so that it can be rotated by the wheel
[Price 1

page_text: and can slide therein. Upon the face of the gear wheel is a flange adapted to bear
against the faces of the gear wheels between which it runs. The said central gear
wheel is thus prevented from moving laterally. If desired, instead of using a
flange I may cast the wheel with an elongated boss in which a groove is formed.
A forked rod or bar fixed to some part of the frame may be adapted to project into
this groove and thus prevent the wheel from moving laterally.
The end rollers of each set are mounted in sliding bearings and are maintained
in contact with the central rollers by springs. Screws or other suitable means may
be employed to regulate the pressure between the said rollers and to compensate
for wear.
Below the upper roller of the upper set, and in contact therewith, is arranged a
scraper; this scraper extends down to the top roller. of the lower set, on the lower
roller of which set is a second scraper from which the paint is delivered into any
suitable receptacle.
The paint to be ground is introduced between the lower pair of rollers of the
upper set from whence it is transferred to the upper roller and thence to the
first scraper.
From the first scraper it is delivered to the upper pair of rollers of
the lower set, thence to the lower roller thereof, and thence to the second scraper
from which it is collected in any suitable manner.
The length of the first scraper is such that the paint, in running down the same,
has time to cool before it is acted upon by the second set of rollers. It is thus
prevented from becoming too highly heated and thereby damaged.
It is obvious that I may modify or vary the details of the construction herein-
before described without departing from the nature of my Invention.
Although, in the foregoing description, I have described only two sets of rollers
as being used together I may, if desired, arrange a third set in combination
therewith, so that after the paint or the like has passed through the first two sets
of rollers it may be delivered to the third set, and there subjected to further
grinding.
Dated this 18th day of January 1884

page_text: I, GEORGE JAMES BASELEY, of Queen Victoria Street, London, in the County of
Middlesex, Engineer, do hereby declare the nature of my Invention for IMPROVE-
MENTS IN MACHINES OR MILLS FOR GRINDING PIGMENTS, PAINT, AND SIMILAR
MATERIALS" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
My Invention relates to machines or mills for grinding pigments, paint, ink, soap,
white lead, and similar materials.
Machines or mills for this purpose have been constructed with a set of three
rollers, between which the pigments or other materials are ground. This number
of rollers has been found insufficient to properly effect the grinding of such
materials, and as the number is limited by the. heat which is imparted to the said
materials by grinding and which has an injurious effect upon some materials, it is
necessary to pass the materials to be ground two or more times through the
machine or mill.
The object of my Invention is to so construct a machine or mill of this class, that
the material when passed once through the same will be sufficiently ground
without being overheated. For this purpose I make the machine or mill with two
or more distinct sets of grinding rollers, each set consisting preferably of three
rollers and being so arranged that the material, after it has been ground by one set,
will be cooled and automatically delivered or fed to the next succeeding set, and so
on. In practice I find that it is sufficient to employ two of these sets of rollers,
and in order to economize space I prefer to arrange the said rollers as hereinafter
set forth so that one set thereof, in grinding the material, will raise the same
before delivering it to the second set..
My Invention is illustrated in the accompanying Drawings, in which
Figure 1 is a front elevation, of one form or modification of my improved mill or
machine,
Figure 2 is a side elevation thereof, partly in section on the line x, x,
Figure 1, and
and C, C1, C³,
These rollers
arranged in a
Figure 3 is a sectional elevation shewing a detail of construction.
A is the frame of the machine, which supports six rollers B, B1, B
preferably formed of granite and provided with iron or steel axles.
are arranged in two sets of three each. The rollers C, C, C are
manner somewhat similar to that usual in mills of the class above referred to, that
is to say, the roller C¹ is carried in fixed bearings D in the frame A, and the
rollers C and C are carried in adjustable bearings D¹ D' in the said frame, which
bearings are acted upon by springs d, d. The springs d tend to maintain the
rollers C, C in contact with the central roller C¹. The set of rollers B, B¹, B* is
arranged at a suitable angle to the set of rollers C, C, C and so that the roller B
is above the roller C; the said rollers B, B' B' are carried in bearings similar to
those above described, the bearings for the rollers B and B being carried in
extensions A¹ of the frame A and acted upon by springs d, d¹.
The rollers in each set are geared together in such a manner that, those adjacent
to, or in contact with, each other rotate at different velocities, each roller rotating
at a higher velocity. than the next preceding roller. By this arrangement a
rubbing action is produced between the said rollers, and the material is carried
around from the first roller of each set by the central roller of the said aet and
delivered to the third roller thereof. If desired, both sets of rollers, may be geared
together so that they can be driven from one pulley, but in the Drawing I have

page_text: •
shewn each set provided with a pulley, as shewn at B and C, to be driven
independently of each other.
The central roller of each set, in the machine shewn, has a lateral to-and-fro
movement imparted to it; for this purpose each of the said central rollers is made
slightly shorter than the distance between its bearings, and a cam E having a
suitably formed groove.e in its periphery, is keyed upon the shaft of the said
roller outside the frame A. A bracket F is fixed to the said frame adjacent to the
cam E and is provided with a stud or projection f adapted to enter the groove e.
As the said roller is rotated, the cam E is caused to move with one or the other
side of its groove in contact with the pin or stud f and thereby cause the to-and-
fro movement of the said roller.
If desired, however, the lateral motion of the centre rollers may be dispensed
with and the gearing modified accordingly.
In order to prevent the gear-wheels G (whereby motion is imparted to the
central rollers) from participating in the to-and-fro movement of the said rollers,
instead of rigidly securing the said wheels on the shafts of the said rollers, I
provide each of the said shafts with a feather or key fitting into a groove in the
corresponding gear-wheel, so that the said wheel will impart rotary motion to the
shaft, but will not be moved laterally, as the said shaft is free to slide to-and-fro
within it. I prefer to cast each of the said wheels with an elongated boss g in
which a groove g' is formed, and to fix on the frame A two plates or bars g³ so
that they will project into the said groove and thus prevent the lateral movement
of the said wheel. But for this purpose I, in some instances, make each of the
said gear-wheels with flanges adapted to bear against the faces of the adjacent
gear-wheels.
The bearings of the rollers B, B and C are adjustable by means of the
screws h to regulate the pressure between these rollers and the central rollers, and
to compensate for wear. For adjusting the roller C, as there is not sufficient space
for an adjusting screw, I employ some other suitable device such as that shewn in
the Drawing, in which there is a flat piece i having a screw-threaded extension ¿¹
which passes through a nut held in a recess in the frame A and made in the
form of a worm-wheel. An endless screw or worm i formed on the spindle i
gears with the worm-wheel or nut is, and the spindle is provided with a hand-
wheel for manipulating it. By turning the said hand-wheel in one direction or the
other the said flat piece i will be moved towards, or away from, the central roller,
and will thus adjust the roller C.relatively thereto.
Beneath the roller B' I provide a scraper 7, which is pivotted to the frame A and
so arranged as to guide the pigment or other material from the first to the second
set of rollers. This scraper is adjustable by means of the nut k which fits upon a
rod k coupled to the said scraper and provided with a left hand screw-thread, and
also upon a rod k coupled to the frame A and provided with a right hand screw-
thread.
Another scraper
is arranged in combination with the roller C which scraper
forms one arm of a two-armed lever, the other arm of which is furnished with a
weight which maintains the said scraper in contact with the roller.
The paint or other material to be ground is fed into the machine in any suitable
manner between the guides m, and passes between the rollers B B', whence it is
transferred by the roller B¹ to the roller B, and by this roller to the scraper j
whereby it is delivered between the rollers C, C¹, whence it is transferred by the
roller to the roller C³, and by this roller to the scraper by which it is delivered
into any suitable receptacle.
The length of the scraper ; is such that the paint or other material, in descending
the same, has time to cool before it is acted upon by the second set of rollers. The
said material is thus protected from injury by overheating.
It will be seen from the above description that my improved machine does the
work of two ordinary mills of the class above referred to.

page_text: It is obvious that I may modify the construction hereinbefore described without
departing from the essential feature of my said Invention. For example, although
in the foregoing description I have described a machine with only two sets of
rollers, I may, if desired, combine a greater number of sets of rollers in one
machine, so that, after the paint or other material has passed through the first set,
it will be delivered to the next succeeding set and so on. Or I can so arrange the
sets of rollers relatively to each other that the feed and delivery are at one side or
end of the machine.
My improved machine presents the following advantages, viz. :-It occupies less
space and costs less than two ordinary machines of the class above referred to. It
is more economical as regards the quality of the material and the labour expended
thereon, because with my machine the process is continuous, that is to say, the
paint or other material only requires to be fed into the machine once, instead of
two or three times, the pause in the grinding that takes place as the material is
passing from one set of rollers to the other set thereof permitting the said material
to cool, so that its color or other qualities is or are not impaired by overheating.
Moreover the lateral or sliding motion of the central rollers ensures the even or
uniform wear of the surfaces of all the rollers and the grinding of the material in
an efficient manner. If desired the rollers C, C, C may be used independently of
the other set of rollers, for example, while the latter are removed for repairs.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is :-
First. A grinding machine or mill having two or more sets of rollers so arranged
that after the material has been ground by one set thereof it will be automatically
delivered or fed therefrom to the next succeeding set, for the purpose above
specified.
Second. The improved grinding machine ог mill consisting of the parts
constructed and combined substantially as described with reference to the
accompanying Drawing and operating as, and for the purposes, specified.
Dated this 98th day of August 1884
HASELTINE, LAKE & Co.,
For the Applicant.