Improvements relating to Sieves Employed in Assorting or Separating Machines for Granular or Pulverulent Materials or Substances.
Year: 1889

page_text: Date of Application, 19th June, 1889
Complete Specification Left, 19th Mar., 1890-Accepted, 26th Apr.,
1890
PROVISIONAL SPECIFICATION.
Improvements relating to Sieves Employed in Assorting or
Separating Machines for Granular or Pulverulent Materials
or Substances.*
.
I, WILHELM SECK the younger of Darmstadt, Germany, Engineer, do hereby
declare the nature of this invention to be as follows:-
My Invention relates to that description of assorting or separating machines which
comprises an enclosing frame having disposed and capable of movement therein one
or more sieves.
Hitherto it has been usual to dispose or arrange the sieves in such machines as
above referred to in a horizontal plane. Now, when the sieves are so placed all
materials or substances to be passed through the meshes of the sieve are caused to
move in circles all having the same direction of rotation upon the surface of the sieve.
Whereas, in accordance with my Invention I propose to place the sieve or sieves in
such machines as above referred to in an inclined position, whereby the granular or
pulverulent substances to be sifted will be caused to travel forward with greater
rapidity, the speed of travel being in proportion to the angle of inclination to which
the sieve or sieves is or are set and to the velocity of motion.
In the improved machine according to my lnvention the granular or pulverulent
matter is moved or caused to travel over a sieve the surface of which is disposed
athwart or transversely inclined to the direction of travel of the material to be sifted.
There may be one or more sieves disposed one under the other and arranged at angles
of different inclinations according to the direction of travel which it is desired the
substance or material under treatment should take.
Dated this 19th day of June 1889.
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C.,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Sieves Employed in Assorting or
Separating Machines for Granular or Pulverulent Materials
or Substances.
I, WILHELM SECK, the younger of Darmstadt, 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 that description of assorting or separating machines which
comprises an enclosing frame having disposed therein and capable of movement
therewith one or more sieves.
Hitherto it has been usual to dispose and arrange the sieves in such machines, as
above referred to, in a horizontal plane. Now when the sieves are so placed all
materials or substances to be passed through the meshes of the sieve are caused to
move in circles all having the same direction of rotation upon the surface of the sieve,
ID: 527

page_text: +
whereas in accordance with my invention I propose to place the sieve or sieves in
such machines as above referred to in an inclined position, whereby the granular or
pulverulent materials or substances to be sifted will be caused to travel forward with
greater rapidity, the speed of travel being in proportion to the angle of inclination to
which the sieve or sieves is or are set and to the velocity of motion.
In the improved machine according to my invention the granular or pulverulent
material or substance is moved or caused to travel over a sieve the surface of which
is disposed athwart, or transversely inclined to, the direction of travel of the material
to be sifted. There may be one or more sieves disposed one under the other and
arranged at angles of different inclination according to the direction of travel which
it is desired the material or substance under treatment should take.
In order that my invention may be thoroughly understood I have appended the
accompanying drawings in which similar letters denote similar parts throughout the
several views.
Fig. 1 shows a longitudinal section of the apparatus.
Fig. 2 is a cross section of the same.
Fig. 3 is a plan of the sieve.
Fig. 4 shows a modification, drawn to a larger scale, of the sieve illustrated by the
previous Figures.
Fig. 5 shows a plan of part of Fig. 4.
In Figs. 1, 2, and 3, the frame a of the sieve is suspended at four points from
its supporting beams by means of rods f, f, f, f, and universal joints, or in any
other convenient manner, so that it can rotate in a horizontal plane. The frame is
rotated by means of the crank shaft g and the driving pulley h, attached to the
supporting beams above the said frame. The driving gear may also be attached
on the under side of the, sieve frame or in any other suitable manner. In the
frame a an inclined sieve b is fixed. If desired, several sieves may be arranged
one above the other. The sieve or sieves is or are transversely inclined to the
line of advance of the material or substance to be sifted or sorted, and this in
combination with the rotating motion of the same causes the material or substance
to move in a fixed direction over the sieve. The material or substance to be sifted
or sorted passes through the inlet e on to the sieve band the finer particles fall
through on to the tray c, which is inclined but in the opposite direction to that
in which the sieve bis inclined, so that the material or substance which has
fallen through the sieve bis advanced in the opposite direction towards the
outlet d. The particles which have remained on the sieve will be moved to the
outlet d. As the frame a is continually in motion the outlets d and d' of the same
are connected with the fixed outlets k, k', by means of tubing made of some flexible
material, such as linen, leather or the like.
If it is desired that the sieve should not be so long and yet desirable to obtain
a long course of the material or substance over the same the arrangement shown
in Figs. 4 and 5 may be employed. The material or substance in this case passes
through the inlet e on to the sieve b, whence it advances to and thence to b¹¹
(Fig. 5), that is to say from right to left. If it is desired that the material or substance
should advance in the opposite direction without altering the direction of rotation
of the frame, the sieve must be arranged in the same manner in which the tray c
(shown in Fig. 4) is, in which case the material or substance will move from
left to right, that is to say from c to c¹ and then to c". The sorted or sifted material
or substance then emerges at the outlets d and d².
In this case several sieves or trays may be arranged one under the other. The
sieve may further be provided with partitions joined to its sides and parallel to
each other and thus various materials or substances may be sifted at one and the
same time.

page_text: 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:
In assorting or sifting machines of the kind specified herein and illustrated by the
accompanying drawings the use of one or more sieves inclined transversely to the
direction of travel of the materials or substances to be sorted or sifted.
1
34
L 1000
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C.,
Agent for Applicant.