Improvements in Grinding and Crushing Mills.
Year: 1894

page_text: Date of Application, 13th Dec., 1834
Complete Specification Left. 13th Sept.. 1895-Accepted, 9th Nov., 1895
Date of Application, 13th Dec., 1834
Complete Specification Left. 13th Sept., 1895-Accepted, 9th Nov., 1895
TRUVIDIONAL
Improvements in Grinding and Crushing Mills.
I, PHILIP A. Cook, of Woodside, Essex County, New Jersey, United States
of America, Engineer, a subject of the Queen of Great Britain, do hereby declare
the nature of my inveution to be as follows:-
The accompanying drawings show a mill involving my invention in the form at
present preferred by me.
Referring to the drawings, Fig. 1 is a side view of a centrifugal crushing mill,
partly in section. Fig. 2 is an end-view of the same, partly in section; and Fig. 3
is a perspective of a detailed part of the same.
The following is a description of the mill illustrated in said drawings, which may
be used either as a dry or wet mill. The body of the mill is formed of a cylindrical
portion 5, 5. 6, 6 are the revolving heads of the cylinders. 7, 7 are rollers,
carried on journals 8, 8, set in journal boxes 9, 9, seated in the revolving cylinder
heads 6, 6. These journal boxes, as shown in Fig. 2, are made rectangular in form
and do not closely fit the recesses in the revolving head-plates 6, 6. A certain
amount of play is provided-say, one and seven-eighths of an inch, or more, if
required. The bearing for the shaft 8 in the journal-box, 9 is drilled out of the
centre, as shown in Fig. 2. The box 9 being removable can be changed around
and set in any desired position. In this way the distance between the crushing
roller 7, carried on the shaft 8, and the crushing ring 10, against which said
rollers bear, can be varied at will to grind the material to any desired degree of
fineness or coarseness.
The cylinder heads 6 are carried on and keyed to main-shaft 11, which is caused to
revolve by any suitable power applied thereto. The cylinder-heads 6, therefore,
revolve with the shaft 11 and carry with them the shafts 8, 8 of the crushing
rollers 7. B is a chamber made to receive suitable packing material, which may or
may not be used. Generally speaking, I prefer to use it when material is being
ground very fine dry, and prefer not to use it when material is being ground wet.
The centrifugal force generated by the rotation of the rollers 7 acts upon the
material which is between the crushing ring 10 and said rollers, with a force
proportional to the velocity of revolution.
K is a hopper through which the material is fed to the mill. This hopper is provided
with a feed device of ordinary construction, the extent of vibration of which is
controlled by a hand-screw J, which after adjustment. is locked by the lock-nut L.
The power to operate the hopper is transmitted from the main shaft by a belt 12,
to a pulley 13, which is connected by shaft 14 to the feeding mechanism of the
hopper.
The rollers 7 carried on shafts 8, journaled in loose boxes 9, are capable of
approaching and receding from the crushing ring 10 a determined distance by
reason of the play provided between the boxes and their seats in the head plates.
Thus all strain and back pressure is avoided and the use of springs or similar
contrivances is rendered unnecessary. If desired, a yielding material such as soft
rubber may be used between the journal boxes and their seats on one side to
prevent jar when the mill stops.
Attached to the shafts 8 are flutter-fans I. C, C, C, are screens placed upon

page_text: the periphery of the chamber opposite the flutter-fans I, against and through
which the crushing material is thrown by said fans. E is a baffle plate to direct
the material as fed to the mill upon the fans H, H, H, set at an angle and by which
said material is fed between the ring and crushing rollers.
The fans A (Fig. 3) arc set at suitable intervals on the inside surfaces of the
revolving plates 6 and operate near and in front of the inside of the screens C so
as to remove from said screens any material which lodges in contact with them, but
which is too large to pass through and to prevent the clogging of said screens by
slimes. The fans A throw the partially ground material in the path of the
fans H, H which catch and put it again under the rolls. A screen D is preferably
placed on the outside, and in front of the journal-boxes 9, to prevent the expulsion
there of ground material.
In the foregoing Specification I have incidentally referred to some of the
modifications which might be adopted in the practice of my invention, but I have
not endeavoured to specify all the modifications which might be employed, the
object of this Specification being to instruct persons skilled in the art to practise
my inventions in their present preferred fornis and to enable them to understand
their nature and I desire it to be distinctly understood that mention by me of a few
modifications is in no way intended to exclude others not referred to, but which are
within the spirit and scope of my invention.
Dated this 12th day of December 1894.
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15 Water Street, Liverpool, Applicant's Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Grinding and Crushing Mills.
I, PHILIP A. Cook, of Woodside, Essex County, New Jersey, United States
of America, Engineer, a subject of the Queen of Great Britain, do hereby declare
the nature of this invention 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 grinding or crushing mills and it consists of certain
novel parts and combinations of parts and also of a novel method as pointed out in
the claims concluding this Specification.
In the drawings accompanying my Provisional Specification, I have illustrated a
mill involving, in forms at present preferred by me, the several novel features of
my invention; but it will be understood that my invention may be embodied in
other forms, and that various modifications and changes may be made without
. departing from its spirit, and without exceeding the scope of the concluding
claims.
Referring to the drawings, filed with the Provisional Specification, Figure 1 is
à side view of a centrifugal crushing mill, partly in section. Figure 2 is an end
view of the same, partly in section; and Figure 3 is a perspective of a detailed
part of the same.
The following is a description of the mill illustrated in said drawings, which may
be used either as a dry or wet mill. The body of the mill is formed of a cylindrical
portion 5, 5. 6, 6. are the revolving heads of the cylinders. 7, 7. are rollers,
carried on journals 8, 8, set in journal boxes 9, 9, seated in the revolving cylinder
Heads 6, 6. These journal boxes, as shewn in Figure 2, are made rectangular in
form and do not closely fit the recesses in the revolving head plates 6, 6. A certain
amount of play is provided-say, one and seven-eighths of an inch, or more, if
required. The bearing for the shaft 8 in the journal-box 9 is drilled out of the
centre, as shewn in Figure 2. The box 9 being removable can be changed round

page_text: and set in any desired position. In this way the distance between the crushing
roller 7, carried on the shaft 8, and the crushing ring 10; against which said rollers
bear, can be varied at will to grind the material to any desired degree of fineness
or coarseness.
The cylinder heads 6 are carried on and keyed to main-shaft 11, which is caused
to revolve by any suitable power applied thereto. The cylinder-heads 6, therefore,
revolve with the shaft 11, and carry with them the shafts 8, 8, of the crushing
rollers 7. B is a chamber made to receive suitable packing material, which may
or may not be used. Generally speaking, I prefer to use it when material is being
ground very fine dry, and prefer not to use it when material is being ground wet.
The centrifugal force generated by the rotation of the rollers 7 acts upon the
material which is between the crushing ring 10 and said rollers, with a force
proportional to the velocity of revolution.
K is a hopper through which the material is fed to the mill. This hopper is
provided with a feed device of ordinary construction, the extent of vibration of
which is controlled by a hand-screw J, which, after adjustment, is locked by the
lock-nut L. The power to operate the hopper is transmitted from the main shaft
by a belt 12, to a pulley 13, which is connected by shaft 14 to the feeding
mechanism of the hopper.
The rollers 7 carried on shafts 8, journaled in loose boxes 9, are capable of
approaching and receding from the crushing ring 10 a determined distance by
reason of the play provided between the boxes and their seats in the head plates.
Thus all strain and back pressure is avoided and the use of springs or similar
contrivances is rendered unnecessary. If desired, a yielding material such as soft
rubber may be used between the journal boxes and their seats on one side to
prevent jar when the mill stops.
Attached to the shaft 8 are flutter-fans I. C, C, C, are screens placed upon the
periphery of the chamber opposite the flutter-fans I, against and through which
the crushing material is thrown by said fans. E is a baffle plate to direct the
material as fed to the mill upon the fans H, H, H, set at an angle, and by which
said material is fed between the ring and crushing rollers.
The fans A (Figure 3) are set at suitable intervals on the inside surface of the
revolving plates 6, and operate pear and in front of the inside of the screens C, so
as to remove from said screens any material which lodges in contact with them,
but which is too large to pass through and to prevent the clogging of said screens
by slimes. The fans A throw the partially ground material in the path of the
fans H H which catch and put it again under the rolls. A screen D is preferably
placed on the outside, and in front of the journal-boxes 9, to prevent the expulsion
there of ground material.
In the foregoing Specification I have incidentally referred to some of the
modifications which might be adopted in the practice of my invention, but I have
not endeavoured to specify all the modifications which might be employed, the
object of this Specification being to instruct persons skilled in the art to practise
my improvements in their present preferred forms and to enable them to understand
their nature, and I desire it to be distinctly understood that mention by me of a
few modifications is in no way intended to exclude others not referred to, but which
are within the spirit and scope of my invention.
Many of the details illustrated and above described are not essential to the
several parts or features of the invention broadly considered. All this will be
indicated in the concluding claims where the omission of an element or the omission
of reference to the detail features of the elements mentioned is intended to be a
formal declaration of the fact that the omitted elements or features are not essential
to the inventions therein severally covered.
As to the feature of my invention which consists of a novel method of operation,
it will be understood that they are not limited to the mechanisın described, nor,.
indeed to any particular mechanism.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a centrifugal crushing mill, the combination with a cylinder and crushing
roll of a screen for the discharge of the pulverized material, set in the periphery of
said cylinder.
2. In a centrifugal crushing mill, the combination with a cylinder and crushing
rolls of a screen for the discharge of the pulverized material, and a fan carried on
the shaft of said roll to aid the discharge of said material.
3. In a centrifugal crushing mill, the combination with a cylinder and crushing
roll of a screen for the discharge of the pulverized material and a fan having a
revolving motion about the centre of said cylinder and a motion of rotation about
its own axis, to aid the discharge of said material.
4. In a centrifugal crushing mill, the combination with a cylinder and crushing
roll, of revolving head plates and journal boxes carrying the shaft of said roll set
in said head plates.
5. In a centrifugal crushing mill, the combination with a cylinder of a crushing
roll carried by a shaft, and journal boxes in which said shaft rotates, said boxes
being smaller than the recesses in which they are placed.
6. In a centrifugal crushing mill, the combination with a cylinder and a crushing
roll carried by a shaft, and journal boxes in which said shaft rotates, the bearing
.for said shaft being out of the centre of said boxes.
7. In a centrifugal crushing mill, the combination with a cylinder and crushing
roll of a screen for the discharge of the pulverized material set in the periphery of
said cylinder and a fan operating on the inside of said screen to prevent clogging
of the screen.
8. In a centrifugal crushing mill, the combination with a cylinder and crushing
mill of a baffle plate extending down below the surface of the roll to direct the
entering material between the crushing roll and cylinder.
9. The method of discharging the pulverized material from a centrifugal
crushing mill, which consists in discharging said material in radial lines acted on
by a fan having a compound motion.
Dated this 13th day of September 1895.
CHEESBROUGH & ROYSTON,
15 Water Street, Liverpool, Applicant's Patent Agents.