Improved Construction of Screens for Cleaning or Screening Corn or other Substances.
Year: 1888

page_text: Date of Application, 9th May, 1888
Complete Specification Left, 1st Mar., 1889
Complete Specification Accepted, 6th Apr., 1889
Improved Construction of Screens for Cleaning or Screening Corn
or other Substances.
I, CHARLES COUSINS, of 7 Broadgate, in the City of Lincoln, Engineer, do hereby
declare the nature of said Invention to be as follows:-
My invention relates to improved construction and arrangement of rotary screen,
and flat screen, whereby the same may be rendered readily adjustable to suit various
grades or sizes of corn, or other substances, to be cleaned or screened.
A rotary screen, constructed according to my invention, consists in the combination
of two drums or barrels,, one of which is of smaller diameter than the other, and
fits tight and easy within the larger, both being fastened to two castings, one fixed
and the other loose, on a shaft common to both drums or barrels. These drums or
barrels may be constructed of wire, but by preference I construct them of sheets or
plates of perforated zinc. The said drums or barrels are so constructed as to present
on their circumference alternate ribs or bars and spaces, the said ribs or bars being so
arranged that when the screen is operated the ribs or bars are brought either entirely,
or partially, over the others. Either the outer or the inner drum or barrel may be
arranged to move over the other drum or barrel, so as to regulate the opening or
closing of the meshes of the screen, and the movement may take place in either a
vertical or a horizontal direction, according to the position in which the ribs or bars
and spaces are arranged.
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A flat screen constructed according to my invention consists of a suitable frame in
which are fixed supports at convenient distances apart. Upon these supports I
arrange a series of rods or bars, or plates of perforated zinc, or other material, in
parallel order. Over these rods, or bars, or over these plates, I arrange a second
series of rods, or bars or of plates, so that when the upper, or the lower, series of
rods, or bars, or of plates, are moved, either vertically or horizontally one over the
other, they are made to cover, or to partially cover, the lower or upper series of rods,
or bars, or of plates, thereby regulating the openings or meshes between the rods, or
bars, or between the plates, to suit different grades of substances to be cleaned or
screened.

page_text: The mechanisin for adjusting these screens may consist of a screw and nut
or any other mechanical device suitable either for rotary or flat screens, as the case
may be.
ERNEST DE PASS, Fel. Inst. P.A.,
68, Fleet Street, London,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improved Construction of Screens for Cleaning or Screening Oorn
or other Substances.
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:
My Invention relates to improved construction and arrangement of rotary screen,
and of flat screen, whereby the same may be rendered readily adjustable to suit
various grades or sizes of corn, or other substances, to be cleaned or screened.
A rotary screen constructed according to my invention consists in the combination
of two drums or barrels one of which is of smaller diameter than the other and fits
within the larger, both being fastened to two castings, one fixed and the other loose,
on a shaft common to both drums or barrels. These drums or barrels may be
constructed of wire, but by preference I construct them of sheets or plates of
perforated zinc, or other metal. The said drums or barrels are so constructed as
to present on their circumference alternate ribs or bars and spaces, the said ribs or
bars of one drum or barrel being so arranged that when the screen is operated, the
ribs or bars of this drum or barrel are brought either entirely or partially over the
ribs or bars of the other drum or barrel. Either the outer or the inner drum or
barrel may be arranged to move over the other drum or barrel, so as to regulate the
opening or closing of the meshes or spaces of the screen, and the movement may
take place in either a vertical, or in a horizontal direction, according to the position in
which the ribs or bars and meshes or spaces are arranged.
A flat screen constructed according to my invention consists of a suitable frame, in
which are fixed supports at convenient distances apart. Upon these supports I arrange
a series of rods or bars in parallel order, or plates of perforated zinc, or other metal.

page_text: Over these rods or bars, or over these plates, I arrange a second series of rods, or bars,
or of plates, so that when the upper, or the lower, series of rods, or bars, or of plates,
are moved, either vertically, or horizontally, one over the other, they are made to
cover, or to partially cover, the lower or upper series of rods or bars, or of plates, and
thereby regulate the openings or meshes between the rods, or bars, or between the
plates, to suit different grades of substances to be cleaned or screened.
The mechanism for adjusting these sereens may consist of row and
other mechanical device or means suitable either for rotary or for flat screens, as the
case may be.
And in order that my invention may be readily understood, I proceed to describe
the same with reference to the accompanying two sheets of drawings.
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other mechanical device or means suitable either for rotary or for flat screens, as the
case may be.
And in order that my invention may be readily understood, I proceed to describe
the same with reference to the accompanying two sheets of drawings.
DESCRIPTION OF THE DRAWINGS.
Sheet I. Fig. 1, is a part elevation and part section of an adjustable rotary screen
constructed according to my invention, the inner and outer barrels or drums being
broken away in order to shew clearly the construction. This arrangement is suitable
for cleaning or screening various grades or sizes of corn, or other like substances.
Fig. 2. is an end view of the same.
Fig. 3. is a fragmentary view in section of the combined drums-drawn nearly
full size shewing the meshes or spaces of the drums completely closed.
Fig. 4. is a like view, but with the meshes or spaces fully open.
Fig. 5. is also a like view, the meshes or spaces being half closed.
Sheet Il. Fig. 1, is a part elevation and fig. 1*, a cross section shewing my
arrangement of adjustable flat screen for cleaning or screening malt. In this
arrangement the movement is imparted in a vertical direction by any suitable
mechanism.
Fig. 2, is a plan and fig. 2* a longitudinal section of an arrangement of flat
screen, in which the rods or bars are of wire, the movement being imparted in a
horizontal direction, and the screen employed for cleaning or screening corn.
Fig. 3. is an enlarged view shewing the meshes or spaces of the screen fully open.
Figs. 4 and 4x show respectively a plan and a longitudinal section of an
arrangement of flat screen, suitable for grading or sizing potatoes, the bars or rods
being of wood, or other material, and the movement being imparted in a horizontal
direction.
Fig. 5 is a cross section of fig. 4 shewing the meshes or spaces partly closed.
Referring to sheet I of the drawings, O is the outer drum or barrel, and I the
inner drum or barrel, both of which are so constructed as to present on their
circumference alternate ribs or bars r, and spaces. The drum or barrel I is arranged
within the drum or barrel O so that when the same is operated the ribs or bars are
caused to advance, or to recede, in such a manner as to either entirely or partially
close the meshes or spaces of the outer drum or barrel, and to thereby regulate the
screen according to the class of material to be treated. These drums or barrels O
and I are secured respectively to two castings o, ox, the castings o being fixed, and ox
being loose. They are both mounted on the shaft S and either may be arranged to
be operated by any well know mechanical means, as for instance by a screw and nut,
so as to cause the ribs or bars of one drum or barrel to move over those of the
other drum or barrel, and to so open or close the spaces of the same in order to
render the screen adjustable to various sizes or grades of material to be treated.
These drums or barrels may be composed or constructed of wire rods of any suitable
section, but by preference I use plates of perforated metal.
Referring to sheet II of the drawings, is a frame in which are fitted supports s
upon which I arrange and fix a series of rods, bars, or strips of metal, or of wood, r,
or a plate of perforated metal, the said rods, bars, or strips being disposed in parallel
order. * is a second but upper series of rods, bars, or strips, or plate of perforated
inetal, so arranged, relatively to the first series, or plate, that when moved by any
suitable mechanism they are caused to travel over and above the lower series or plate,

page_text: thereby closing or opening, or partially closing or opening the spaces or meshes
existing between the lower series of rods, bars, or strips, or the lower plate, and thus
rendering the screen adjustable to various sizes of material to be treated. The
adjustment is effected by means of any suitable mechanism and the movement may
be imparted in either a vertical or a horizontal direction by any suitable and well-
known means.
Or, if preferred, the lower series of rods, or bars, or the perforated plates, may be
arranged to move or travel under the upper series of rods, or bars, or under the upper
perforated plates.
Having now particularly described and ascertained the nature of my Inven-
tion and in what manner the same is to be performed, I claim,
1. The construction and use of adjustable rotary screen, for cleaning or screening
corn, or other like substances, in which two barrels or drums composed of plates of
perforated metal, or of rods of wire, are so arranged and combined that the inner
barrel or drum is caused to move or travel within the outer barrel or drum, and to so
regulate the spaces or meshes of the outer barrel or drum, or vice versa, substantially
as hereinbefore described and shewn with reference to figs. 1, 2, 3, 4, and 5 (sheet I)
of the annexed drawings.
2. The construction and use of adjustable flat screens, for cleaning, screening, or
grading malt, potatoes, and other substances, in which a series of parallel rods or
bars of wire or wood, or plates of perforated metal, set in a frame, are so arranged as
to be moved over and above a corresponding lower series of rods, or bars, or plates of
perforated metal, and to thereby regulate the spaces or meshes of such lower series,
or vice versa, substantially as hereinbefore described and shewn with reference to
figs. 1, 1×, 2, 2×, 3, 4, 4×, and 5 (sheet II) of the annexed drawings.
Dated this 1st day of March 1889.
ERNEST DE
PASS,
68, Fleet Street, London,
Agent for the Applicant.