A NEW OR IMPROVED ADJUSTABLE SORTING OR SEPARATING SIEVE
Year: 1882

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, Proprietor of the firm
of J. Brandt & G. W. v Nawrocki, Patent Solicitor and Civil Engineer of
124, Leipzigerstrasse, Berlin, Germany, for an Invention of "A NEW OR
IMPROVED ADJUSTABLE SORTING OR SEPARATING SIEVE." A communication
from Louis Hirschfeldt, of Teterow, in the Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 30th November
1882.
GERARD WENZESLAUS VON NAWROCKI Proprietor of the firm of J. Brandt
& G. W v. Nawrocki Patent Solicitor and Civil Engineer of 124 Leipziger-
strasse, Berlin, Germany "A NEW OR IMPROVED ADJUSTABLE SORTING OR
SEPARATING SIEVE." A communication to me from Louis Hirschfeldt, of Teterow
in the Empire of Germany
The sorting or separating sieve forming the subject of this invention possesses
the peculiarity that it can be immediately adjusted according to the size of the
objects to be sorted or separated by it. It consists substantially of an obliquely
placed frame or board which is open at its middle part.
Beneath this opening are placed the rods composing the riddle or sieve itself the
distance of these rods from each other can be varied at pleasure according to the
size of the objects to be sorted or separated. For this purpose they are pin jointed
at their two ends to bars or rails which are hinge jointed together by pins which
slide in slots parallel to the sieve rods while the other ends of the bars slide
in slots standing in a position at right angles to the first named slots. From this
arrangement it follows that the distance of the rods from one another will vary
according to the obliquity of the bars to which they are jointed. The obliquity of
these bars to each other is adjusted as follows a small chain is fixed to the middle
rod of the sieve and is wound round a small drum turned by a crank handle which
drum can be held in various positions by a ratchet wheel and pawl. The rods can
be pushed down by means of a Knob if and when they do not fall down by their
own weight,
The objects to be sorted or separated are placed in a hopper and fall
through an opening in the bottom thereof on to the sieve formed by the before
mentioned rods,

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent
Office on the 28th May 1883.
GERARD WENZESLAUS VON NAWBOCKI, Patent Solicitor and Civil Engineer,
of 124, Leipzigerstrasse, Berlin Germany "A NEW OR IMPROVED ADJUSTABLE
SORTING OR SEPARATING SIEVE," a communication from Louis Hirschfeldt, of
Teterow, in the empire of Germany,
The adjustable separating sieve, represented in the accompanying drawing,
possesses the peculiar feature that it may be immediately adjusted according to the
size or bulk of the material to be sorted.
The sieve consists substantially of a board A placed in an inclined position and
cut out in the centre.
The aperture thus formed is filled out by means of the bars a arranged
underneath the board, and the distance of which bars from each other is
adjustable.
For the purpose of adjusting the bars a the latter are pivoted at both ends and
in the centre to the cross rails b and d.
The rails b and d are connected together at one end by means of a pin which
slides in the slot t which is parallel with the bars a, while the other ends of the rails
slide in the slots g the direction of which is perpendicular to the slot t.
In consequence of this arrangement the distance of the bars a from each other
varies according to the inclination of the rails b and d.
The rails b and d are adjusted in the following manner.
A small chain h, is fixed to the central bar a and wound on the small drum Z.
The drum is turned by means of the crank m, and may be secured in various
positions by means of the ratchet wheel n and the click o.
+
Fig. 2 represents the bara a at the greatest distance from each other, while
Fig. 3. represents the bars a nearest together.
If the bars do not fall owing to their own weight they may be adjusted by means
of the knob p.
The material to be assorted is put in the hopper 8 and falls through the aperture u
on the sieve formed by the bars a.
CLAIM
In sorting sieves the slots of which can be varied by altering the inclination of
the cross-rails, the means for adjusting or controlling the said cross-rails, which
means consist of grooves g and t, in combination with hand wheel and chain,
substantially as described.
In witness whereof I, the said Gerard Wenzeslaus von Nawrocki, have
hereunto set my hand and seal this 24th day of May A.D 1883.
TACTזוזה
HA
ATA DOCT