Improvements in Pulverisers.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Pulverisers.
I JAMES PHIlip Griffiths of Dudley in the County of Worcester do
hereby declare the nature of this invention to be as follows:-
-
Improvements in pulverisers constructed to work on a reducing principle with
4 or more rolls to which rotation is imparted from one to another by their own
friction all having smoothe surfaces and run at a great speed so that a large
output can be effected and at the same time the material passes in a thin
stream through the rolls which reduce the material to any degree of fineness
at one operation by extra pressure on the rolls.
Pulverisors of various kinds have for some time been known, these machines
which are used for the purpose of breaking, crushing, or pulverising various
substances, have been constructed on many different principles.
In some machines the substances are broken up by edged runners revolving in a
circular pan, in other machines the substances are operated upon by one or more
iron balls enclosed in an iron circular drum or cylinder, various other methods are
in use, all or nearly all the machines at present in use, have a tendancy to wear
unevenly on the face of their wearing surfaces, so that the material which is
being operated upon, can pass through without receiving the full force of the
working pressure of the machines. In all or nearly all these machines, the
material when operated upon is passed into the machines in a thick stream so
that the harder particles imbed themselves in the softer materials and so pass
through the machines without being reduced to any uniform degree of fineness,
and in consequence have to be passed through the machines or re-operated upon
several times before being fit for use.
In my improved form of pulverisor 1 by a novel arrangement of the parts, and
by a new and improved construction of the parts, construct a pulverisor which is
free from unequal wearing of the surfaces, and deals effectually with all or nearly
all materials at one operation, the materials being fed into the machine at an even
thickness, pass through it almost instantaneously, so that although the output is so
great, the material is in only a very thin stream, when it is in the course of
operation, by this means, the material can be reduced to almost any degree of
fineness.
In the construction of my machine, I provide a shaft of steel or other
suitable materials, mounted in bearings, either in combination with my patent
disentegrator No. 4741 A.D. 1893 or any other machine, or seperately, and I
provide a pulley or other suitable device for imparting rotary motion to the shaft,.
upon the shaft I key or otherwise suitably mount a parallel circular pulley or
roll, this roll I construct of steel, chilled iron, or other suitable material, I also
mount on & seperate shaft and suitable bearings, a second roll, having a flange on
each side, this roll is fixed somewhat below the horizontal line of main shaft of
No. 1 roll, and is for the purpose of finishing or giving the last degree of fineness
to the material which is being operated upon, and is kept in motion by its
own friction against the No. 1 roll on main shaft. At the same angle over
the horizontal line of main shaft, I mount on another shaft with suitable
bearings, upon which I key or otherwise suitably secure a third flanged roll,
which is similar to No. 2, but somewhat larger, in order to give extra working

page_text: power to the machine, and having double work to perform, this roll is also
kept in motion by its own friction against No. 1 roll.
Over the centre of No. 3 roll, I mount in suitable bearings a fourth roll, to
which motion is given by its own friction against No. 3 roll. No. 1 and No. 4 rolls
are plain, but No. 2 and No. 3 are flanged for the purpose of preventing the
materials from passing through the machine without coming in contact with the
pulverizing surfaces, or I may flange ouly one side of the rolls.
I also construct a series of adjusting screws and springs, or other suitable
means for the purpose, of regulating the ammount of friction or presure upon the
rolls.
T
3
1904
Improvements in Pulverisers.
I, JAMES PHILIP GRIFFITHS of Dudley in the County of Worcester
Chemical Manufacturer 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 :-
Improvements in pulverisers constructed to work on a reducing principle with
4 rolls to which rotary motion is imparted from one to another by their own
friction all having smooth surfaces and run at a great speed so that a large
output can be effected and at the same time the material passes in a thin stream
through the rolls which reduce the material to any degree of fineness at one
operation by extra pressure on the rolls.
some
Pulverisers of various kinds have for some time been known these machines
which are used for the purpose of breaking crushing or pulverising various
In
on many different principles.
substances have been constructed
machines the substances are broken up by edged runners revolving in a circular
pan. In other machines the substances are operated upon by one or more iron
balls inclosed in an iron circular drum or cylinder various other methods are in use
all or nearly all the machines at present in use have a tendency to wear unevenly
on the face of their wearing surfaces so that the material which is being operated
upon can pass through without receiving the full force of working pressure of the
machine. In all or nearly all these machines the material when operated upon is
passed into the machines in a thick stream so that the harder particles embed
themselves in the softer materials and so pass through the machines without being
reduced to any uniform degree of fineness and in consequence have to be passed
through the machines or re-operated upon several times before being fit for use.
In my improved form of pulveriser 1 by a novel arrangement of the parts and
by a new and improved construction of the parts construct a pulveriser which is
free from unequal wearing of the surfaces and deals effectually with all or nearly
all materials at one operation the material being fed into the machine at an even
thickness pass through it almost instantaneously so that although the output is so
great the material is in only a very thin stream when it is in the course of
operation and so passing between a series of rapidly revolving hard surfaces
can be reduced to any degree of fineness at one operation.
My invention is constructed to work in combination with my patent disin-
tegrator No. 4741 A.D. 1893 or any other machine, or seperately and is illustrated
in and by the accompanying drawings.
Fig. 1 is an end or side view shewing the position of the rolls and the given
angles of the slide bearings Fig. 2 is a cross section, Fig. 3 is a cross section of
d 4 roll, shewing the action of adjusting screw e, and lock nut f, clutch g spring h

page_text: slot for slide bearings i slide bearings ; mortice for spring k, mortice for cotter-
pin l, and cotter pin m.
By this method all the rolls are caused to approach or move away from each
other by the reverse action of the screw e. Fig. 4 is an end or side view of Fig. 3.
Roll a 1 is plain 62 is flanged and c 3 is also flanged for the purpose of preventing
the material from escaping the pulverizing surfaces. Roll d4 is plain and is for
the purpose of breaking down the rough material and in so doing it somewhat
impedes the motion of roll c3 and gives it an action against roll a 1 as though they
were geared for the one to run faster than the other-but this action ceases upon
the machine running empty. n. 1 and n 2 are conveying shutes o and ol are
supporting lugs p is slot through which main shaft is introduced in fixing the
machine and q is the outlet for the finished material.
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.
1st. The arrangement of improvements in pulverisers constructed to work on a
reducing principle with 4 rolls to which rotary motion is imparted from one to
another by their own friction all having smooth surfaces and run at a great speed
so that a large output can be effected and at the same time the material passes in
a thin stream through the rolls which reduce the materials to any degree of fineness
at one operation by extra pressure on the rolls.
2nd. The construction of the rolls-being alternately flanged and plain for the
purpose of preventing the material from escaping the pulverizing surfaces.
3rd. The arrangement of the rolls for No. d4 to somewhat impede the action of
No. c 3 and gives it the same action against roll al as though they were geared
for the one to run faster than the other but this action ceases upon the machine
running empty as herein before described.
Dated this 13th day of December 1894.
JAS. PHILIP GRIFFITHS.