Year: 1886

page_text: Date of Application, 11th Nov., 1886.
Complete Left, 5th Aug., 1887.
Complete Accepted, 6th Sept., 1887.
My improved straining apparatus is applicable in various branches of industry,
for instance, straining fibrous materials in the manufacture of paper, for treating
washed colours and earths in the manufacture of colours, and for straining the
material for the manufacture of cellulose.
The object of my invention is to obtain, in a small space, a large straining surface;
which forms an approximately horizontal partition between the two compartments of
the straining tank, but is not liable to be clogged by solid particles.
For this purpose the straining surface is zigzag, tooth-shaped, or corrugated ; and
the shaking or stirring device forms a similar surface at a short distance from the
straining surface.
In the accompanying drawings, Figs. 1 and 2 are longitudinal and cross sections
of a sifting apparatus, with zig zag shaped straining surface. Figs. 3 to 5 are
longitudinal sections, showing different forms of sifting surfaces. Figs. 6 and 7 are
longitudinal and cross sections showing a further modification.
A box or tank A is divided into an upper compartment a¹ and a lower com-
partment a, by a continuous or interrupted straining or sifting surface, S. The
upper compartment usually remains open, and receives the material to be sifted ; the
lower compartment is closed and receives the material which has passed through
the sifting surface.
To prevent the clogging of the sifting surface S, by the material to be sorted, a
shaking device B is applied, preferably in such a manner, that the surface nearest to
the strainer (that is to say the upper surface), corresponds to the zig zag, corrugated,
or toothed shape of the straining surface.
The particles which are too coarse, are allowed to escape through apertures b
situated at the lowest portions of the straining surface; provided, of course, that
the said particles do not float on the surface. For the latter case, overflows should be
applied.

page_text: The shaking device B may be set in motion in any convenient manner; for instance,
horizontally as in Figs. 1 and 2, or vertically as in Fig. 3, by means of an eccentric e
and may be guided by stuffing boxes c. The apertures in Figs. 1 and 3 are only
intended to give room for the discharge pipes b. For discharging the sifted material,
an outlet must be provided from the compartment a³, for instance, a discharge pipe f
as shown in Fig. 2.
Fig. 1 illustrates a sifting surface composed of triangular zig zag elements. Fig. 3
shows a plain corrugated shape, and Fig. 4 a surface composed of tooth or cup shaped
elements.
A further modification is represented by Fig. 5 where the zig zag line of the sieve
is broken at the points or apexes. In comparison with the arrangements previously
described, this modification offers the advantage that the different sifting elements can
be more easily exchanged. It is evident that the zig zag or corrugated shape need
not follow the longer side of the sieve, but may also lie along the narrow side, as
indicated by figs. 6 and 7.
The advantages over other sifting appliances are: a large sifting surface combined
with a small depth of the box or trough; facility for exchanging the sifting surface,
and for cleaning the apparatus; also easy supervision of the process.
Dated this 11th day of November 1886
FAIRFAX & WETTER,
433, Strand, London,
Agents for the Applicant.

page_text: in Liquids.
I, RUDOLPH KRON, Engineer and Manager, at Golzern, in Germany, 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 improved straining apparatus is applicable in various branches of industry, for
instance, straining fibrous materials in the manufacture of paper, for treating washed
colours and earths in the manufacture of colours, and for straining the material for
the manufacture of cellulose.
The object of my invention is to obtain, in a small space, a large straining surface;
which forms an approximately horizontal partition between the two compartments of
the straining tank, but is not liable to be clogged by solid particles.
For this purpose the straining surface is zigzag, tooth shaped, or corrugated; and
the shaking or stirring device forms a similar surfaco at a short distance from the
straining surface.
In the drawings filed herewith, Figs. 1 and 2 are longitudinal and cross sections
of a sifting apparatus, with zigzag shaped straining surface. Figs. 3 to 5 are
longitudinal sections showing different forms of sifting surfaces. Figs. 6 and 7 are
longitudinal and cross sections showing a further modification.
Å box or tank A is divided into an upper compartment al and a lower com-
partinent a, by a continuous or interrupted straining or sifting surface, S. The
upper compartment usually remains open, and receives the material to be sifted; the
lower compartment is closed at the top and receives the material which has passed
through the sifting surface.
To prevent the clogging of the sifting surface S, by the material to be sorted, a
shaking device B is applied, preferably in such a manner, that the surface nearest to
the strainer, (that is to say the upper surface)_corresponds to the zigzag, corrugated
or toothed shape of the straining surface. The particles which are too coarse are
allowed to escape through lateral apertures situated at the lowest portions of the
straining surface; provided, of course, that the said particles do not float on the
surface. For the latter case, overflows should be applied.
The shaking device B may be set in motion in any convenient manner: for instance,
horizontally as in Figs. 1, 3 and 4; or vertically as in Fig. 5, by means of an
eccentric e, and may be guided by stuffing boxes c. In the apparatus illustrated by
Figs. 1 and 2, the discharge openings 6 are provided with slides b' adapted to close
the said openings, and lead to a collecting box 60 which may have an outlet canal.
For discharging the sifted material, outlets are provided from the compartiment a²,
for instance the openings, which in the arrangement represented by Figs. 1 and 2
lead the sifted material to the discharge canal. The shaking appliance B is
preferably made hollow in parts as shown in Figs. 1 and 2, and guided by rods k, k²,

page_text: the rods serving at the same time to transmit motion from the driving shaft e to
the shaking device B. The valve v serves to empty the compartment a², and the
handless facilitate the introduction and exchange of the sieves S. m is the inlet for
the material to be sifted, and n an overflow for discharging the sifted material.
Figs. 1 and 2 illustrate a sifting surface composed of triangular or zigzag elements.
Fig. 3 shows a plain corrugated shape; the apertures i are only intended to give
room for the discharge pipes b. Fig. 4 shows a surface composed of tooth or cup
shaped elements. A further modification is represented by Fig. 5, where the zigzag
line of the sieve is broken at the points or apexes. In comparison with the arrange-
ments previously described, this modification offers the advantage that the different
sifting elements can be more easily exchanged.
In the arrangement shown by Figs. 1 and 2, as well as in that indicated by the
longitudinal sections or diagrams Figs. 3 and 4, the shaking appliance is set in
motion horizontally; in Fig. 5, on the contrary, the shaking motion is vertical. Any
convenient mechanism may be employed for setting the shaking device B in motion.
The elastic diaphragm o surrounding the shaking body on the four sides, serves to
close the compartment a' from which the sieved material escapes through the outlet f.
It is evident that the zigzag or corrugated shape need not follow the longer side of
the sieve, but may also lie along the narrow side, as indicated by Figs. 6 and 7.
The advantages over other sifting appliances are: a large sifting surface combined
with a small depth of the box or trough; facility for exchanging the sifting surface,
and for cleaning the apparatus; also easy supervision of the process.
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 :-
1. A sifting apparatus having a zigzag shaped, corrugated or toothed sifting
surface or plate, arranged horizontally in an open trough, and a shaking appliance
corresponding in shape to the sifting surface and situated underneath the latter in
the compartment for the sifted material, the ridges of the said sifting surface being
either continuous or interrupted, substantially as described and indicated by Figs. 1, 3,
and 4.
2. A sifting apparatus having a trough A divided into an upper and a lower
compartment a¹ and a² by a zig zag shaped, corrugated, or toothed sifting surface S,
(the ridges of the zigzag surface being either continuous or interrupted as indicated
by Fig. 5), and a shaking appliance B situated below the sifting surface, that side of
the shaking appliance which is situated nearest to the sifting plate corresponding in
shape to the latter, and the two compartments a¹ and a² of the trough being provided
with outlets b and ƒ or 66° and fo f¹, substantially as described.
1 1
L A
1007
FAIRFAX & WETTER,
433, Strand, London,
Agents for the Applicant.