Improvements in and relating to Apparatus for Separating, Sorting, or Bolting Powdered or Granular Materials.
Year: 1889

page_text: Date of Application, 21st Dec., 1889
Complete Specification Left, 21st Oct., 1890-Accepted, 22nd Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in and relating to Apparatus for Separating, Sorting,
or Bolting Powdered or Granular Materials.
I, PHILIPP ADAM TAFEL, of Augsburg, Bavaria, in the Empire of Germany,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to machines for separating or bolting powdered or granular
material by means of plain sieves; and the objects of the same are first, to increase
the effectiveness of the sieve bv affording special means for considerably extending the
path of the material upon the meshed bottom, and, second to impart to it the required
excentric motion.
I attain these objects by arranging upon the meshed bottom of a preferably circular
sieve for the passage of the material to be sorted or separated a continuous path
of the form of an Archimedian or similar spiral and by subjecting the sieve to the
joint action of two or more parallel, rotating cranks, which are pivoted to the frame
of the sieve and adapted to impart to it the necessary motion to cause the material,
while separated, to travel through the whole path prescribed by a spirally formed wall.
The result of the motion transmitted to the sieve is, that the centre and each point of the
sieve is actunted to describe a circle, the radius of which corresponds with the radius of
the actuating cranks. In accordance with the direction of the rotation of the
employed cranks the sorting of the material may take place by feeding the same at
the periphery and discharge the plump grains or extraneous matter at the centre of
the spiral into a separate spout, or conversely. To avoid a too excessive extension or
size of the sieve, it will be advantageous to pass the material to be sorted through a
plurality of sieves.
The frame or reel of the sieve is preferably of the form of a flat drum, which is at
half of its height provided with the actual bottom, serving to sort the material
according to the desired degree of fineness. Upon the said meshed bottom a wall
bent after the form of an Archimedian spiral or similar curved line is erected and in
the outer thread of this drum the material to be separated in entering though a hose
connected with the supply funnel.
In consequence of the motion imparted to the drum by means of a pair of rotating
cranks, the material to be separated is caused to travel along the spiral path to a
central spout. In this way an effective separation of the finer particles, which pass the
meshes of said meshed bottom, takes place, while the plump grains and other extraneous
matter are conveyed to the said central spout of the sieve and either discharged into
bags or the like or conducted through a hose into the central portion of a second drum
which is arranged beneath and similarly constructed as the foregoing drum with the
only difference, that the material on the meshed bottom of the second drum is caused
to pass the spiral way in a direction reverse to the former, that is to say, from the
centre to the periphery.
The finer parts of the material having passed the meshed bottom of the first drum are
collected on its plain solid bottom and then conveyed, either by means of a spiral path
wound in a direction opposite to that above the said meshed bottom, or by means of
compartments radiating from the centre of the drum, into a spout at the periphery of
the drum where they may be discharged for further treatment.
In the second drum the coarser parts of the material having passed the spiral way
bounded by a correspondingly wound wall is discharged at the periphery of the said
drum into a spout, while the finer particles having passed the meshed bottom of this drum
are collected on the plain solid bottom of the latter beneath the meshed bottom and
conveyed by means of suitably arranged walls into a separated spout which is preferably
situated opposite the spout discharging the coarser particles of the material.
The

page_text: material thus separated may be drawn off into bags, casks or other vessels or it may
be separately conducted for further treatment.
In order to enable the material having passed either or both of the meshed bottoms
of one or both sieves to be drawn off according to its different degrees of fineness,
the said plain bottoms of the drums may be provided at different places with gates
which are to be operated by means of handles to be easily accessible from outside
of the frames.
Instead of imparting the desired circular motion to the drums by means of one pair
of cranks, 1 sometimes prefer to suspend the drums between three or more parallel
arranged cranks of equal radius, of which only one needs to be agitated either by a
gearing mounted upon its shaft or by connecting its crank pin through the medium of
a pitman with a like parallel crank of a separate rotating shaft while the other cranks
only sorve as a guidance. I prefer this arrangement in view of the omission of any
dead-point position, which will otherwise occur by the employment of two cranks
at every time, when two cranks will come in line. In case of employment of two
cranks however it is advisable to situate the centre or initial point of the said spiral-
path outside of the centre of circular motion of the sieve, which will be easily
obtained by giving the brackets connecting the drums with the crank pins unequal
length in order to sustain the progressive motion of the material in the spiral path.
It will be evident, that instead of a plain bottom having radiating compartments or
a spiral path the drums may be provided with a funnel-shaped or inclined bottom with
a central or lateral spout and that also in combination with those sieves an air-current
or draft may be employed as is done with similar machinery of this kind serving
the same purpose.
Dated this 21st day of December 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Apparatus for Separating, Sorting,
or Bolting Powdered or Granular Materials.
I, PHILIPP ADAM TAFEL, of Augsburg in the Kingdom of Bavaria, Germany,
Engineer, 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 machines for separating or bolting powdered or granular
material by means of plain sieves, and the said invention has for its object first to
increase the effectivoness of the sieve by affording special means for considerably
extending the path of the material upon the meshed bottom, and, second, to impart to
it the required eccentric motion.
I attain these objects by arranging upon the meshed bottom of a preferably circular
sieve a continuous path of the form of an Archimedian or similar spiral for the passage
of the material to be sorted or separated and by subjecting the sieve to the joint
action of two or more parallel, rotating cranks, which are pivoted to the frame of the
sieve and adapted to impart to it the necessary motion to cause the material, while
separated, to travel through the whole path enclosed by a spirally formed wall.
The result of the motion transmitted to the sieve, is such that tho centre of the
sieve and each point of the same is caused to describe a circle, the radius of which
corresponds with the radius of the actuating cranks. In accordance with the direction
of the rotation of the cranks the sorting of the material may take place by feeding
the same at the periphery and discharging the coarse grains and extraneous matter
at the centre of the spiral into a separate spout, or conversely. To avoid a too
excessive extension or size of the sieve, it will be advantageous to pass the material
to be sorted through a plurality of sieves.

page_text: In the accompanying drawings I have shown how my said invention may be
conveniently and advantageously carried into practice.
Figure 1 is a vertical section of a duplicated sieve made according to my invention.
Figure 2 is a plan with the cover removed so as to show the interior of the sieve,
and
Figure 3 is a vertical cross-section of the same.
Figures 4 and 5 illustrate a side elevation and a plan respectively of a single sieve
with the cover removed, the said sieve being actuated by three co-operating cranks.
Figure 6 is a vertical cross-section of a single sieve illustrating a modification.
Figures 7 and 8 are two horizontal cross-sections through the bottom compartments
showing two different constructions of the same.
Figures 9 and 10 are two vertical cross-sections of a single sieve illustrating two
other modifications in the construction of the bottom compartiments.
Figure 11 is a vertical cross section and
Figure 12 a plan, with the cover removed, of a single sieve provided with a
supplementary arrangement for separating the lighter materials, such as bran, from
the heavier parts, and
Figures 13, 14 and 15 illustrate details of construction.
Similar letters of reference indicate corresponding parts throughout the several
views. The frame or reel of the sieve is preferably of the form of a flat drum A A¹,
which is at the centre of its height provided with the meshed bottom cor
respectively, serving to sort the material according to the desired degree of fineness.
Upon the said meshed bottom the wall n or n' respectively bent in the form of an
Archimedian spiral or similar curved line is erected. The material to be separated
passes into the outer convolution of the upper drum A through the tube a and the
hose b connected with the supply funnel.
In consequence of the motion imparted to the drum A by means of a pair of
rotating cranks r and s, and through the medium of brackets r and s', the material to
be separated is caused to travel along the spiral path to the central spout g. In this
way an effective separation of the finer particles, which pass the meshes of the
bottom c takes place, while the coarse grain and extraneous matter are convoyed to
the said central spout g and either discharged therethrough into bags or the like,
or conducted through a hose pipe into the central portion of a second drum A¹
which is arranged beneath and constructed in a similar manner to the drum A except
that the material on the meshed bottom of the second drum is caused to pass along
the spiral path in the reverse direction to the former, that is to say, from the contre to
the periphery.
The finer parts of the material having passed the meshed bottom c of the drum A
are collected on the bottom d and then conveyed, either by means of a spiral path m
(Figures 1, 3 and 11) wound in a direction opposite to that of the wall n, or by means
of compartments m³ (Figures 6, 7 and 5) radiating from the centre of the drum, into
the spout at the periphery of the drum where they may be discharged for further
treatment.
In the second drum A' the coarser parts of the material having passed the spiral
way bounded by the corresponding wall n' is discharged at the periphery of the said
drum into a spout g', while the finer particles having passed the meshes of the
bottom c¹ are collected on the plain solid bottom d¹ of the drum and conveyed by
means of suitably arranged walls m³ into the spout . The material thus separated
may be drawn off into bags, casks or other vessels or it may be separately conducted
away for further treatment.
In some cases I also arrange within the spiral path of the material to be sorted,
wedge-shaped projections o, p (Figure 2) on the faces of the spiral walls at suitable
spaces, which are adapted to impede or obstruct in a certain degree the progressive
motion of the material upon the meshed bottom c and thus to increase the effective-
ness of the latter. In order to enable the material after having passed either or both
of the meshed bottoms c or el to be drawn off according to its different degrees of
fineness, the bottoms d or d' of the drums may be provided at different places with

page_text: gates which are to be operated by means of their respective bandles 9 9¹ q² to be
easily accessible from the outside of the frames.
y of a
Instead of imparting the desired circular motion to the drums by means of one
pair of cranks r and sort and u, I sometimes prefer to suspend the drums between
three or more parallel cranks v w x (Figures 4 and 5) of equal radius of which one
only need be driven either by a gearing mounted upon its shaft or by connecting its
crank pin through the medium of a pitman z with a similar parallel_crank
separately rotating shaft, the other cranks only serving as guides. I prefer this
arrangement in order to avoid the dead-point position, which will occur every time
the cranks and s or t and u (Figure 1) come in line, when only two are employed.
In the employment of two cranks however it is advisable to situate the centre or
initial point of the said spiral-path outside, the centre of the circular motion of the
sieve, which will be easily obtained by making the brackets ¹ and s¹ or t¹ and u¹ of
unequal lengths in order to sustain the progressive motion of the material in the
spiral path.
It will be evident, that instead of a plain bottom having radiating compartments
(Figures 7 and 8) or a spiral path, the drums A, A' may be provided with a funnel-
shaped or inclined bottom with a central or lateral spout (Figures 9 and 10).
It will moreover be evident that an air current or draught may be employed in
combination with these sieves as is done with machinery of this kind serving the
same purpose.
.
In some cases I may use in combination with the several arrangements herein before
described peculiar shaped gutters nº (Figures 11 and 12) which are preferably
connected to the upper edge of the spirally arranged walls n or n¹ respectively
(Figure 15) above the sieve c or c. These gutters serve to catch the lighter and in
most cases coarser parts of the material to be separated for instance the bran of
ground corn, which when oscillating motion is imparted to the drum will float on
top of the heavier parts, and to conduct them separately towards the spout g² as
illustrated in Figures 11 and 12. These gutters nº are made preferably of the various
cross-sections illustrated in Figures 11 to 15 which only allows the material once
caught by the gutters to escape another way such as to the spout through the end of
the spiral.
In several cases these gutters may be made of sheet metal either perforated
throughout (Figures 13 and 14) or perforated only at one side of the wall n
(Figure 15) and they may also be adjustable in such a manner, that their distance
from the sieve can be varied according to the constitution of the materials to be
bolted or separated.
By these means the finer parts of the material caught by the gutters are separated
again from the coarser parts during their passage towards the spout gª.
-
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
First. The improvement in bolting and separating machines, the druin herein
described having a central sieve, and upper and lower series of spiral pathways
having independent discharge spouts, substantially as set forth.
Second. The improvement in bolting and separating machines, the upper and
lowor agitating drums herein described, said upper drum having a central sieve,
upper and lower series of pathways a central connection between said upper path-
ways and said lower drum, and an independent discharge spout for said lower pathway
substantially as set forth.
Third, The improvement in holting and separating machines, the upper and
lower agitating drums herein described each having a central sieve and upper and
lower series of spiral pathways and the connection between said upper pathways of
said drums, substantially as set forth.
Fourth. In a bolting and separating machine, the combination of the crank shafts,
the drums connected thereto each having a central sieve, and upper and lower

page_text: oppositely extended spiral pathways the flexible connection between the upper
passages of said drums, the independent discharge spouts for said lower pathways,
and the independent discharge spout for the upper pathway of said lower drum,
substantially as set forth.
Fifth. In a bolting and separating machine, the drum having a sieve, a spiral path
and sliding gates periodically arranged beneath said sieve, substantially as set
forth.
Sixth. In a bolting and separating machine, the drum having a sieve, and a
spirally arranged wall provided with opposite projections in the line of the path, as
and for the purpose set forth.
Seventh. In a bolting and separating machine with oscillating sieve and a spirally
arranged wall, substantially as specified, the combination with a gutter or gutters on
top of the spirally arranged wall, as and for the purpose set forth.
Eighth. In a bolting and separating machine with oscillating sieve, a spirally
arranged wall, having connected to its upper edge a gutter or gutters, which may be
adjusted at different height from the plane of the sieve, as and for the purpose set
forth.
Ninth. In a bolting and separating machine with oscillating sieve, a spirally
arranged wall, being provided at its top with a perforated gutter or gutters following
the path of the wall and leading to a separate spout, substantially as and for the
purpose set forth.
Dated this 211000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.