Improvements in Screens used for Dressing Malt and other Substances.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Screens used for Dressing Malt and other
Substances.
We, WILLIAM RAINFORTH, WILLIAM RAINFORTH Junior, and HENRY
SLACK RAINFORTH, of Britannia Iron Works, Lincoln, Manufacturers, do
hereby declare the nature of the said invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following.
statement :-
This invention relates to improvements in the construction of the beds of
reciprocating flat screens used in dressing malt, corn and other seeds and other
substances.
The invention is illustrated on the accompanying drawing which represents in
perspective view, partly in section, sufficient of a flat screen constructed in
accordance with the present improvements, to fully illustrate the latter. The
screen may be made of any required dimensions.
Referring to the drawing
1, represents the side frames of the screen or dressing bed, which may be formed
with opposite longitudinal slots. 2, to permit of the passage of the usual cross-rods.
carrying washers used for keeping the spaces between the dressing wires of the
screen free from obstruction.
The frames 1, are connected by transverse frames 3, which may be rivetted or
otherwise suitably secured thereto, as at 4.
The frames 3, are, in accordance with the present improvement, adapted to locate
and support the dressing wires 5, by having equi-spaced recesses 6, punched or cut.
from out of their upper edges, such recesses opening out through the top edges of
the frames, so as to permit of the top edges of the wires projecting above the level
thereof, and being at their upper part of a narrower or contracted formation than
at their lower part, so as to necessitate the wires being inserted endwise into the
recesses and as to hold the wires down to the bed when inserted.
The wires, when all are in position, are prevented from shifting endwise or other-
wise by being soldered or brazed to one or more of the frames 3, where they intersect
therewith.
By the aforesaid improvement, the wires are located by the frames connecting.
the side frames in such a manner (owing to the frames not projecting above the
wires) as to allow of the malt, seeds or material being dressed descending
uninterruptedly down the inclined bed of the screen.
It is preferred to use wires 5, of the section represented on the drawing, in which
the wire is made with an angular apex 7, and with a flat parallel-sided body part 8,
as we have ascertained that wires of such improved formation used in the construc-.
tion of the beds of such screens, offer a combination of advantages not existent in
such screens made of wires of any section ordinarily used. The adjacent angular
tops of the wires present well defined channels which facilitate the separation of the
smaller from the larger malt, seeds or other material being dressed; and the flat.
parallel sides of the adjacent wires present broad wearing surfaces to the action of
the usual washers which keep the spaces between the wires free from obstruction,
and so prevent alteration of the mesh of the wires through the edges thereof being.
speedily worn away.
This peculiar section of wire may be modified by making the sides of the apex of
the wire, as also the sides of the body part of the wire, of a very slightly convex
formation. The aforesaid improved section of wire may be used in the construction
of flat or other screens used for dressing or separating purposes.
The aforesaid improved method of locating the wires may, however, be used with

page_text: wires of any other suitable section which can be held down as aforesaid by contracted
open-topped recesses made in the supporting frames.
Having now particularly described and ascertained 'the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is-
1. The herein before described novel and peculiar method of securing the wires
in the bed of a flat screen used for separating or dressing purposes.
2. The herein before described novel and peculiar form or section of wire, and the
'application of wires of such form or section in the formation of flat and other screens
used for separating or dressing purposes.
Dated this 10th day of June 1892.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicants.