Improvements in Mills for Crushing, Pulverizing, Grinding, or Reducing.
Year: 1887

page_text: Date of Application, 21st Jan., 1887
Complete Left, 21st Oct., 1887
Complete Accepted, 22nd Nov., 1887
PROVISIONAL SPECIFICATION.
Improvements in Mills for Crushing, Pulverizing, Grinding,
or Reducing.
We WALDEMAR JENISCH and HERMAN LÖNERT of Bromberg in the Empire of
Germany Engineers do hereby declare the nature of this Invention to be as
follows:-
Our Invention relates to mills in which the reducing action is obtained by means
of balls or their equivalents in a rotating drum or cylinder which mills as heretofore
constructed are slow in action-The object of our Invention is to so construct them
as to remove this objection which we do by providing perforated deflecting surfaces
in the interior of the drum or cylinder in which the balls or their equivalents
operate the said perforated deflecting surfaces extending from the internal periphery
in a straight or curved form but preferably in a curved form inwards towards the
axis of the cylinder so that they cause the balls or their equivalents to deviate from
a circular path and to act very efficiently upon the materials by dropping thereupon
from the inward ends of the said perforated deflecting surfaces the drum or cylinder
being rotated in a direction such that the outward end of each of the perforated
deflecting surfaces is followed by the inward end of the same surface. In the
cylinder beneath each such surface is an opening extending across the width of the
cylinder (or it may be partly closed at the middle) and a fine sieve is stretched across
each such opening. By the aforesaid perforated deflecting surfaces the materials
being operated upon are kept away from the sieves until they have been reduced to
the required degree. The portion of the material which does not pass through the
sieves but, remains in the spaces between the perforated deflecting surfaces and the
sieves is carried round with the cylinder and falls back onto the coarse or unground
part of the material and is thereby again brought under the action of the balls or
their equivalents. The ground material which passes through the sieves is collected
in a casing in which the cylinder or drum is situated and can be removed through an
opening provided for the purpose.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C.,
Agents for the said W. Jenisch and F. Löhnert.

page_text: Improvements in Mills for Crushing, Pulverizing, Grinding,
or Reducing.
We WALDEMAR JENISCH and HERMAN LÖHNERT of Bromberg in the Empire of
Germany Engineers 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:-
Our Invention relates to mills in which the reducing action is obtained by means
of balls or their equivalents in a rotating drum or cylinder which mills as heretoforo
constructed are slow in action. The object of our Invention is to so construct them
as to remove this objection which we do by providing perforated deflecting plates
or surfaces in the interior of the drum or cylinder in which the balls or their
equivalents operate, the said perforated deflecting plates or surfaces extending from
the internal periphery in a straight or curved form inwards towards the axis of the
cylinder so that they cause the balls or their equivalents to deviate from a circular
path and to act very efficiently upon the materials by dropping thereupon from the
inward ends of the said perforated deflecting plates or surfaces, the drum or cylinder
being rotated in a direction such that the outward end of each of the perforated
deflecting plates or surfaces is followed by the inward end of the same plate or
surface. In the cylinder beneath each such plate or surface is an opening extending
across the width of the cylinder (or it may be partly closed at some portion or portions,
for example, at the middle) and a sieve of a fineness according to the degree of
fineness to which the material is to be reduced is stretched across each such opening.
By the aforesaid deflecting plates or surfaces the materials being operated upon
are kept away from the sieves until they have been reduced to the required degree.
The portion of the material which does not pass through the sieves but remains in the
spaces between the perforated deflecting surfaces and the sieves is carried round
with the cylinder and falls back on to the coarse or unground part of the material and
is thereby again brought under the action of the balls or their equivalents. The
ground material which passes through the sieves may be collected in a casing in
which the cylinder or drum is situated and can be removed through an opening
provided for the purpose.
In order that our Invention may be fully understood we will now describe with
reference to the accompanying Drawings the manner in which the same may bo
performed. Figure 1 is an elevation with the outer case in section and Figures 2
and 3 are sections in vertical planes at right angles to each other of apparatus
constructed according to our Invention. a is a cylinder or drum which is rotated by
any suitable power in the direction of the arrows in Figure 3. In this cylinder or
drum are holes b, c, either each consisting of a slit extending from side to side of the
cylinder or drum or of several openings for example in lines parallel with the axis of
the drum. The holes are covered over by sieves d. Inside the cylinder a are tho
perforated deflecting plates e, f fixed over the holes and sieves as shewn clearly in
Figure 3. As the cylinder revolves in the direction of the arrows the balls ġ fall
from off the inward parts of the deflecting plates on to the inner periphery of the
cylinder, the centrifugal force of the balls as they fall acting on the material to be
ground.
When the material is ground to the requisite degree of fineness it passes through

page_text: g
the sieves d. Figures 4 and 5 shew a modification wherein the body of the cylinder
itself is dispensed with and the perforated deflecting plates ef are arranged in such
a manner that they constitute the cylinder a. They may be fixed to the side pieces
or discs 263 in any suitable manner, for example, they may be flanged at both sides,
the flanges being attached to the said side pieces or discs 623 as shewn diagram-
matically in Figure 6 or they may be fixed to the said side pieces or discs by means
of angle iron (instead of flanges) as shewn diagrammatically in Figure 7. The
cylinder may be fixed to the shaft. C by the boss c² and arms c¹ as in Figures 2 and 3
or it may be affixed as in Figures 4 and where the arms c¹ are secured to the shaft
by the boss c and to the one side disc or piece the other disc or plate 63 being
secured to the shaft C by the boss e. The material to be acted upon is introduced to
the cylinder by any suitable means such as by the hopper h. As this last form of
cylinder, Figures 4 and 5 revolves in the direction of the arrow (Figure 4) the balls
fall from one deflecting plate on to the other thus pulverizing the material as in the
preceding case. In this latter arrangement however the material which passes through
the perforated deflecting plates ef drops on to the sieves d but between these sieves d
and the said deflecting plates, sieves with a coarser mesh than that of the sieves d
may be fixed to protect the fine sieves d by preventing the coarser material from
passing on to the said finer sieves. As the machine revolves the material which
has passed through the perforated plates ef but which is too coarse to pass through
the meshes of the sieve d or of the sieves and d falls through the opening
back into the body of the cylinder to be again acted upon for further reducing it.
In each of these spaces f, m, a perforated plate n may be placed it having holes
larger than the holes in the perforated deflecting plates ef. This plate n can either
be fixed or it can be hinged so as to open when the revolving action of the machine
takes it upwards and to close when the revolving action of the machine takes it
downwards. The cylinder a may be cylindrical or polygonal and it may be enclosed
in a case x with a shoot y to the outlet.
m
Having now particularly described and ascertained the nature of this Invention
and in what manner the same is to be performed we declare that what we claim is :-
1. In mills in which a crushing pulverizing grinding or reducing action is obtained
by means of balls or their equivalents in a rotating drum or cylinder, perforated
deflecting plates or surfaces in the interior of the said drum or cylinder the said
plates or surfaces being arranged for causing the balls or the like to deviate from a
circular path and to drop on to the material being acted upon substantially as herein-
before described.
2. In mills in which a crushing pulverizing grinding or reducing action is obtained
by means of balls or their equivalents in a rotating drum or cylinder perforated
deflecting plates or surfaces in the interior of the said drum or cylinder the said plates
or surfaces being arranged for causing the balls or the like to deviate from a circular
path and to drop on to the material being acted upon in combination with openings
with a sieve or sieves or a sieve or sieves and perforated plates a substantially as
hereinbefore described.
3. The arrangements and combinations of parts constituting mills for crushing
pulverizing grinding or reducing substantially as hereinbefore described and illustrated
in Figures 1, 2, and 3, and in Figures 4 and 5 of the accompanying Drawings.
Dated this 21st day of October 1887.