Improvements in the Construction of Screens for Screening Grain.
Year: 1891

page_text: Date of Application. 26th June, 1891
Complete Specification Left, 13th Feb., 1892-Accepted, 19th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Screens for Screening Grain.
I, CHARLES COUSINS, of 7 Broadgate, in the City of Lincoln, Engineer, do
hereby declare, the nature of this invention to be as follows:-
for
My invention relates to improvements in the construction of screens
screening grain, whether rotary or flat screens, and it has for its object to so
construct these screens that the grain under treatment shall be acted upon in a
more efficacious manner than heretofore, and that the screens shall at the same
time be kept cleaner and prevented from becoming clogged.
For the purpose of my invention, and according to one arrangement, I construct
the screens of wire of triangular or equivalent shape, in cross section, and, in the
case of rotary screens, I arrange the coils or layers of wire forming the drums
with their apices outwards (that is to say away from the axis or centre of the
drum), while their bases face the interior of the drum. In the case of flat
screens the wires are arranged in the usual manner but with the apices of such
triangular shaped wire pointing outwards.
Or according to another arrangement I construct the drums with wire, or coils
of wire, of a lozenge, rhomb, diamond, or double triangle shape in cross section,
and, by preference, I round or take off their side angles. This section of wire is
likewise applicable to flat screens.
يم
T
1001
ERNEST DE PASS,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Screens for Screening Grain.
I, CHARLES COUSINS, of 7 Broadgate, in the City of Lincoln, 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, reference being had to the accompanying drawings and to the letters
and figures marked thereon, that is to say :-
According to my present invention I construct the drums of rotary screens of
wire of triangular or equivalent shape in cross section, and arrange the coils or
convolutions of wire so that the apices of the triangles point outwards, that is to
say away from the axis or centre of the drum. By this construction the grain
under treatment is therefore acted upon in a far more efficacious manner than
heretofore, and, at the same time, the drum is kept cleaner and free from becoming
clogged by the grain.
And in order that my invention may be readily understood, I will describe the
same with reference to the accompanying drawings.
Fig. 1, is a longitudinal section of a portion of the drum of a grain screen
constructed in accordance with my improvements, and Fig. 2 is an end view of the
same.
a are the coils or convolutions composing the drum, and said coils or convolutions
are made from wire of triangular shape in cross section. These wire coils or
convolutions are so arranged that the apices of the triangles are on the outside of
the drum, that is to say the bases of the triangles are within the drum and parallel
with the axis thereof.

page_text: In this construction the cross section of the triangular wires is that of an equi-
lateral triangle, but, if requisite, I can use wire the cross section of which would
be that of an isosceles triangle, or of other equivalent and convenient shape.
The coils or convolutions of the wire constituting the drum may be opened,
closed, and regulated by any of the well known means now employed for the
purpose, so as to increase or decrease the meshes or interstices.
I may also use a brush, or a strip of leather, rubber, or other rigid material, to
further aid in keeping the meshes or interstices clear. This brush may be mounted
and applied to the screen in the well known manner. But when employing a strip
of rigid material, I may mount the same in a frame or holder and apply it against
the periphery of the drum.
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. The construction of drums of rotary screens from wire of triangular or other
equivalent shape in cross section (arranged in coils or convolutions) with the
apices of the triangles pointing outwards, substantially as and for the purposes
described.
2. In the construction of drums of rotary screens, the use of wire of
triangular or equivalent shape in cross section (arranged in coils or convolutions)
with the apices of the triangles disposed on the periphery of the drum, as and for
the purpose described.
1
2nd day of February
ERNEST DE PASS,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.