A New or Improved Sifting Machine.
Year: 1892

page_text: Date of Application, 6th Aug., 1892
Complete Specification Left. 6th May, 1893-Accepted, 10th June, 1893
PROVISIONAL SPECIFICATION.
A New or Improved Sifting Machine.
I, GOTTLIEB MAERKY of Wöschnau near Aarau in the Republic of Switzerland
Mechanician do hereby declare the nature of this invention to be as follows:-
The hereinafter described sifting machine will with a saving of power,
expenditure and space, in a single process, separate more meal products in all
qualities than can be obtained by any other machine. This is effected by means of
cells or channels with a suitable sieve bottom or screen in which the siftings are
given a motion in the direction of the channels or cell grooves and at right angles
to the main course. The sieve bottoms or screens are slightly inclined so that in the
most advantageous manner and with the channels or cellular walls having oscillating
motion the moving sifted meal is carried towards the outlet over the sieves or
screens and thereby sifted. These cells or channels are arranged to the required
number in the sieve boxes which are shaken with an eccentric motion and can be
filled with different meal products; so that, the sieves lying across the direction of
the shaking motion, as shown for instance in the example of cell division represented
in the drawing, as many as four different meal products can be sifted, and sorted
into 32 different lots at one time.
Besides the foregoing, the continuous working brush arrangement under the
sieves should be mentioned; by this the brushes, whilst they follow the stroke of
the sieve box, receive at each stroke a slight shaking, and so, gradually, clear the
whole surface without thereby injuring the silk-stuff used in the finer kind of
sieves.
In the accompanying drawings,
Fig. 1 shows a front view of the cellular sifting machine with side partly broken
away;
Fig. 2 represents the gear of the sieve box, in plan;
Fig. 3 Sheet 2 is a vertical longitudinal section through the sifting machine;
Fig. 4 is a cross section on the line x-x (Fig. 3);
Figs. 5 and 5B are vertical longitudinal sections with disconnected sieve
boxes;
Fig. 6 is a cross section on the line - (Figs. 5 and 5B);
Fig. 7 is a horizontal section on the line y-y (Figs. 5^ and 5B);
Fig. 8 Sheet 3 is a front view of the brush driving apparatus ;
Fig. 9 shows a side view of the same;
Fig. 10 is a plan of the same;
Figs. 11 and 12 Sheet 4 show a portion of the brush driving apparatus in front
view and plan respectively;
Figs. 13 and 14 illustrate a carrier of the brush driver in front view and plan
respectively;
Fig. 15 is a detail;
Figs. 16, 17 and 18 show the arrangement of the oscillating movement in side
and front elevation and plan respectively;
Figs. 19 and 20 illustrate in detail a casting board or deflector in side and front
views.
In the frame A of the machine are two sieve boxes a¹ and a suspended by the
attachment pieces or links b in such a manner that the boxes swing at their points
of suspension 6°. The movement of the sieve boxes takes place by means of the
eccentric rods c' and c and the eccentrics and c arranged at an angle of 180° on
the driving shaft W. The single sieve boxes, each have respectively two inclined
sieve surfaces namely d, and d and d (Figs. 3 and 5) arranged to the required

page_text: numbers of cells or channels by the partitions e parallel to the main shaft W,
(Fig. 12).
On the cell walls are suitably placed casting boards inclined towards the outlet
in the manner shown on Figs. 16, 17, 18, 19, 20.
By means of the eccentrics on the shaft W the two boxes a¹ and a' are given a
rocking motion and entirely without that violent knocking as by the displacement
of the eccentrics a contrary motion of the boxes is caused. The rocking motion
takes place at right angles to the sides of the cells without the usual violent and
uneasy action and thus the sloping plane of the sieves aided by the casting boards
produces the movement or transport of the material to be sifted.
The internal arrangements of the boxes such as the feeding, the carrying inwards,
and the delivery can be arranged differently according to the desired process of
sifting and are here shown in Figs. 3-7. It may be that only one sieve box is
necessary according to the product to be sifted and in such case each sieve box is
made to work separately by itself (see Figs. 54 and 5) so that in many cases a
machine with only one sieve box would be sufficient. On the contrary, as is the
vase with fine stuff which comes from the bolting reels or roller mills if it be
necessary that there should be a greater differentiation, then the products can be
Jed through both boxes as in Fig. 3. If the machine be used for finishing (compare
Fig. 3) then in each sieve box two different sifting processes can be completed,
therefore by means of both boxes, four simultaneously. There may for instance
be admitted into one (the upper) sieve box, the meal from a roller mill for fine or
white flour and a bran mill and to the other (the under) box the meal from a detaching
roller and an ordinary roller mill, or on the contrary, which by the arrangement of
the cells in the machine is easily done, as the single cells work independently of
one another. Thus, in the first case with a machine of fourteen cells eight may be
utilized for the roller mill for fine or white flours and six for the bran mill.
sieve
The action of finishing is as follows:-The meal stuff is brought by the elevator
to the separator B of the machine (Figs. 5 and 5B) and from thence distributes
equally to the cells of the upper sieve d'or d³ respectively. This first upper
is stretched with silk and it is here that the meal is drawn out that falls on the
inclined plane g and passes out by the exit h. What passes this sieve reaches the
under sieve d² or d respectively which are like the others covered with silk gauze
and coarse silk. The dust and the grits pass away through separate spouts h
whilst the delivery takes place into the exit h¹.
Should the machine be used for the process of crushed grain sifting, the cells
will have to be divided per unit of time according to the quantity to be sifted out
of a certain measure of coarse ground corn in a given time, so that up to twelve
lots of crushed meal may be sifted at a time quite independently. With the machine
represented in Fig. 3 four crushed meals can be sifted and therefore the
distributor B (see also Fig. 1) is provided with four inlets. The action is as
follows: The upper sieve is the coarsest and draws off meal dust and grits
which reach the tray g; and thence the second sieve; what passes over consists of
coarsely ground corn and it is carried by the exit to the next rollers. The
second sieve d' is first fitted with a medium and then with a greater mesh and
separates what falls through the upper sieve into meal dust and medium grit, the
former going away through 3 and into second grits, which go through ; what
passes over falls through he and consists of the dressing (detached tops of the shells
of the grains). The meal, dust, and medium grits now reach the third sieve d' in
the second box. Here the meal is separated and removed through h; the rest,
consisting of the dust and medium grits, is completely assorted on the fourth
sieve d' so that the medium grits are brought down through h', finer grits
through h, dressing dust through and meal dust through 10.
To keep the meshes open, it is necessary that the sieves should be cleaned
by special brush arrangement from below. For this purpose, there are brought
under each sieve several brushes which are connected with each other by
bars. The brushes of each sieve box are then set in motion together and

page_text: so that the mechanism affords the brushes a certain room for play, in order
that they may follow the stroke of the boxes. If this precaution be not taken
the covering of the sieves, especially the finer silk cloth would be speedily
injured. The brush movement follows independently of the eccentric shaft by
means of the driving gear represented in Figs. 8, 9 and 10. By the gearing V,
the worm-wheel m with the worm k is set in motion. The worm k gears with the
worm wheel in on which in the middle of the crank pin m' is the connecting rod n,
which connects to the lever o of the vertical shaft p. This shaft has two clutches
or carriers which in like manner set in motion the pivot lever arms s also mounted
on the shaft p. The arms s carry at their extremity (Figs. 11, 12 and 13), on a
fixed bolt, a movable collar which is connected with two of the rods that move
the brushes of the sieve. The carrier Figs. 13 and 14 is arranged in such a
manner that it allows the lever arms s sufficient space between its wooden cheeks r¹;
this space corresponds to the stroke of the sifting boxes, so that the brushes can
follow the directly following stroke of the box during its agitation and by the
described mechanism are slowly moved and the whole silk or sieve surface is thus
gradually cleaned.
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1000
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
A New or Improved Sifting Machine.
I, GOTTLIEB MAERKY of Wöschnau near Aarau in the Republic of Switzerland
Mechanician 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 :-
The hereinafter described sifting machine will with a saving of power,
expenditure and space in a single process separate more meal products in all
qualities than can be obtained by any other machine. This is effected by means of
cells or channels with a suitable sieve bottom or screen in which the products for
sifting are given a motion in the direction across the channels or cells and at right
angles to the channel or main course. The sieve bottoms or screens are slightly
inclined so that the grist in being cast towards the channel or cellular walls which
besides are advantageously provided with casting boards is carried towards the
outlet over the sieves or screens and thereby sifted. These cells or channels are
arranged to the required number in the sieve boxes which are shaken with an
eccentric motion and can be filled with different meal products; so that the sieves
lying across the direction of the shaking motion, as shown for instance in the
example of cell division represented in the drawing as many as four different meal
products can be sifted and sorted into 32 different lots, at one time.
Besides the foregoing, the continuous working brush arrangement under the
sieves should be mentioned; by this the brushes, whilst they follow the stroke of
the sieve box, receive at each stroke a slight shaking, and so, gradually clear the
whole surface without thereby injuring the silk stuff used in the finer kind of
sieves.
In the drawings accompanying the Provisional Specification :
Fig. 1 shows a front view of the cellular sifting machine with side partly broken
away;
Fig. 2 represents the gear of the sieve box, in plan.
Fig. 3, Sheet 2, is a vertical longitudinal section through the sifting machine.
Fig. 4 is a cross section on the line -x (Fig. 3).
Figs. 5 and 5 are vertical longitudinal sections with disconnected sieve boxes,
Fig. 6 is a cross-section on the line - (Figs. 5^ and 5³);

page_text: Fig. 7 is a horizontal section on the me
Fig. 8, Sheet 3, is a front view of the brush driving apparatus ;
Fig. 9 shows a side view of the same;
Fig. 10 is a plan of the same;
Figs. 11 and 12, Sheet 4, show a portion of the brush driving apparatus in front 5
view and plan respectively.
Figs. 13 and 14 illustrate a carrier of the brush driver in front view and plan
respectively.
Fig. 15 is a detail.
Figs. 16, 17 and 18 show the arrangement of the oscillating movement in side 1
and front elevation and plan respectively.
Figs. 19 and 20 illustrate in detail a casting board or deflector in side and front
views.
In the frame A of the machine are two sieve boxes a¹ and a² suspended by the
attachment pieces or links in such a manner that the boxes swing at their points
of suspension 6º. The movement of the sieve boxes takes place by means of the
eccentric rods c¹ and c and the eccentrics and c arranged at an angle of
180 degrees on the driving shaft W. The single sieve boxes each has respectively
two inclined sieve surfaces namely d', a and d³, d, Figs. 3 and 5, which are
arranged to the required numbers of cells or channels by the partitions e, parallel
to the main shaft W. (Fig. 12).
On the cell walls are suitably placed casting boards inclined towards the outlet
in the manner shown on Figs. 16, 17, 18, 19, 20.
By means of the eccentrics on the shaft W the two boxes a' and a' are given a
rocking motion and entirely without that violent knocking as by the displacement
of the eccentric a contrary motion of the boxes is caused. The rocking motion
takes place at right angles to the sides of the cells without the usual violent and
uneasy action and thus the sloping plane of the sieves aided by the casting boards
produces the movement or transport of the material to be sifted.
The internal arrangements of the boxes such as the feeding, the carrying
onwards, and the delivery can be arranged differently according to the desired
It niay be that only one sieve
process of sifting and are here shown in Figs. 3—7.
box is necessary according to the product to be sifted and in such case each sieve
box is made to work separately by itself (see Figs. 5 and 5B) so that in many
cases a machine with only one sieve box would be sufficient. On the contrary, as
is the case with products which come from the bolting reels or roller mills if it be
necessary that there should be a greater differentiation, then the products can be
If the machine be used for finer grits or
led through both boxes as in Fig. 3.
dusts (compare Fig. 3) then in each sieve-box two different sifting processes can
be completed, therefore by means of both boxes, four simultaneously. There may
for instance be admitted into one (the upper) sieve box the grist or grain from a
roller mill for fine or white flour and a bran mill and to the other (the under) box
the grist or grain from a detaching roller and an ordinary roller mill or, on the
contrary, which, by the arrangement of the cells in the machine, is easily done, as
the single cells work independently of one another. Thus in the first case with
a machine of fourteen cells eight may be utilized for the roller mill for fine or
white flours and six for the bran mill.
The action for separating finer products would be as follows:-The grist or
grain is brought by the elevator to the separator B of the machine (Figs. 5 and 5B
and from thence distributed equally to the cells of the upper sieve d' or d
respectively. This first upper sieve is stretched with silk and it is here that the
meal is drawn out that falls on the inclined plane g and passes out by the exit /
What passes this sieve reaches the under sieve d² or d respectively which are lik
the others covered with silk gauze and coarse silk. The dust and the grits pas
away through separate spouts ° whilst the delivery takes place into the exit h¹.
Should the machine be used for the process of crushed grain sifting, the cell
will have to be divided per unit of time, according to the quantity to be sifted ou

page_text: of a certain measure of coarse ground corn in a given time, so that up to 12 lots of
crushed meal may be sifted at one time quite independently. With the machine
represented in Fig. 3 four crushed meals can be sifted and therefore the
distributor B (see also Fig. 1) is provided with four inlets. The action is as
follows:-
The upper sieve d¹ is the coarsest and draws off meal, dust and grits which reach
the tray and thence the second sieve; what passes over consists of coarsely
ground corn and it is carried by the exit to the next rollers. The second sieve d
is first fitted with a medium and then with a greater mesh and separates what falls
through the upper sieve into meal, dust and medium grits the former going
away through hand into second grits which go through h. What passes over
falls through and consists of the dressing (detached tops of the shells of the
grains). The meal, dust and medium grits now reach the third sieve d in the
second box. Here the meal is separated and removed through h; the rest
consisting of the dust and medium grits is completely assorted on the fourth sieve d
80 that the medium grits are brought down through h', finer grits through h³,
dressing dust through ' and meal dust through 10.
To keep the meshes open it is necessary that the sieves should be cleaned by
special brush arrangement from below. For this purpose there are brought under
each sieve several brushes which are connected with each other by bars . The
brushes of each sieve box are then set in motion together and so that the mechanism
affords the brushes a certain room for play in order that they may follow the stroke
of the box. If this precaution be not taken the covering of the sieves, especially
the finer silk cloth, would be speedily injured. The brush movement follows by
the eccentric shaft W by means of the driving gear represented in Figs. 8, 9 and 10.
By the belt gearing V the worm-shaft with the worm k is set in motion. The
worm gears with the worm-wheel m which by means of the crank pin m' and the
connecting rod n communicates motion to the lever o of the vertical shaft p.
shaft has inounted thereon clutches or carriers which in like manner set in motion
the pivot lever arms s. The arms s carry at their extremity (Figs. 11, 12 and 15)
on a fixed bolt t a movable collar q which is connected with two of the rods that
move the brushes of the sieve. The carrier (Figs. 13 and 14) is arranged in such
a manner that it allows the lever arms sufficient space between its wooden cheeks;
this space corresponds to the stroke of the sifting box so that the brushes can
follow the directly following stroke of the box during its agitation and by the
described mechanism are slowly moved and the whole silk or sieve surface is thus
gradually cleaned.
This
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
1. In sifting machines in which the grist is moved forward at right angles to or
across the direction of the stroke of the shaking motion in parallel sieve cells or
channels with suitable sieve bottoms, the application of casting boards or deflectors
on the walls of the channels or cells for aiding the movement or transport of the
material to be sifted, substantially as described.
2. In sifting machines, a brush appliance consisting of a vertical shaft p which in
suitable manner is set in swinging motion and provided with clutches or carriers r,
in which clutches or carriers the levers s are arranged. with play for actuating the
brushes, in order that the brushes, moved slowly forward by the levers, clean the
sieves, while at the same time following the shaking motion of the box sub-
stantially as described.
3. The apparatus shown on the drawings.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.