Improvements in Plates for Separating Seeds of Weeds from Grain.
Year: 1899

page_text: Date of Application, 7th Jan., 1899-Accepted, 4th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Plates for Separating Seeds of Weeds from Grain.
I, NICOLAUS HEID, of Stockerau, near Vienna, Austria Manufacturer, 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:
For the separation of both the lenticular and the globular seeds of weeds from
grain there has hitherto been employed either a sorting cylinder having only large
recesses or cells for the reception of such seeds, or having large cells in the upper
part of the cylinder and smaller cells in the lower part; or two cylinders are
employed of which the one has large cells and the other smaller cells.
The cylinder with large cells has the disadvantage that many good and useful
seeds of cereals or grain are also taken up by the cells, thus causing a loss in the
yield. The cylinder with two kinds of cells has in addition the disadvantage of a
more limited production, and the use of two cylinders having different sized cells
causes, in addition to the increased cost, double the expenditure of time for
effecting the purification of the grain from the seeds of weeds, as the grain has
to be fed in twice pver.
The present invention relates to the construction of a separating or sorting plate,
the cells of which are formed with stepped walls, by which means the above
described disadvantages are obviated.
The accompanying drawings shew by way of example some forms of separating
or sorting plates constructed according to my said invention.
Fig. 1 shews a part plan of a plate, Fig. 2 a longitudinal section, and Fig. 3 a
cross section.
The cells a, which may be produced of the form shewn either by a single cutting
or stamping operation, or by any other suitable known means, have their walls
formed with a step or off-set b extending right round, whereby the upper part of
the cells is made of a greater width than the hemispherical lower part of the cell.
By this means the small globular seeds of weeds are taken up and retained in
the smaller part of the cells, while the larger upper part serves to take up the
larger lenticular shaped seeds, which could not be retained by cells of the usual
diameter for retaining the small globular seeds. Small, but good, cereal seeds
could only enter the enlarged part of the cells, so that on the rotation of the
evlinder they will fall out of the cells again before they have been raised to the
height at which the channel is situated for receiving the seeds of weeds. The
lenticular seeds of weeds are on the other hand sufficiently retained in the enlarged
part of the cells to cause them to be carried up to above the said discharge channel
The small depth of the part of the cell above the off-set prevents these larger
seeds from becoming lodged too firmly in the cells so that a choking of the cells
will not take place.
As shown at Fig. 4, the off-set b can also be so formed that its inner edge touches
the edge of the plate at the highest point. The plate can also be made with a
perforation in the bottom of the cells, as shewn in Figs. 5 and 6.
Instead of

page_text: forming the cells with their axis inclined to the plate, their axis may also be made
perpendicular thereto as shewn at Fig. 6.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:
Plates for separating or sorting seeds of weeds from grain, the cells a of which
are formed with a smaller lower part connected by a step or off-set 6 with a larger
upper part, for the purpose of simultaneously separating the smaller globular
seeds and the larger lenticular seeds of weeds from the grain, substantially as
described.
Dated this 7th day of January 1999.
ABEL & IMRAY,
Agents for the Applicant.