Year: 1892

page_text: We, TOM PARKINSON and GEORGE MARSDEN PARKINSON, of Doncaster
Mills, Doncaster, in the County of York, Millers, 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 :-
This invention is designed for the purpose of removing from dust laden air the
impurities or solid matters which it may contain and is particularly applicable to
apparatus used in the treatment of grain where an air blast or suction is employed
for carrying off from the grain the dust and similar light impurities which may be
mixed with it. The apparatus constructed according to this invention is intended to
remove from the air the dust etc. which it has thus taken up although the invention
is not confined to this particular application.
In the accompanying drawings
Figure 1 is a horizontal section.
Figure 2 a sectional elevation.
Figure 3 an end sectional elevation of the apparatus.
Figures 4, 5, and 7 are horizontal sections of modified forms of the
apparatus, and
Figure 6 is a vertical cross section upon line of Figure 5.
2
A represents the casing containing and closing in the apparatus into which a
current of the air to be treated enters by the passage B either under the influence.
of a blast or exhaust according to circumstances. If a blast be employed the top of
the apparatus may be open as indicated in Figure 2 but if the apparatus is to work
by suction the top should be sufficiently closed in and connected with an exhaust:
fan or blower as will be well understood."
The air entering by the channel B passes between the S-shaped plates preferably
of metal C which are arranged in vertical rows across the chamber L the course
which the air has to travel being indicated by the arrows in Figures 1 and 2. In.
passing between the plates C the air parts with the dust and impurities previously
carried with it and these falling down the channels in the plates leave them by
their bottom edges and pass into the lower portion D of the chamber in the bottom
of which is located the worm or other conveyor E by which the dust is removed.
from the apparatus and delivered by the outlet F from which it may be taken and
dealt with in any required manner. The lower chamber D has tapering sides so.as
to direct the impurities on to the conveyor and it may be divided up into sections
by the boards or partitions G if desired.
The air liberated from almost, if not quite, the whole of its impurities in passing
by the plates C escapes by the passages H to the upper or exit portion I of the
apparatus where owing to the provision of ample space it expands. and should it.
contain any further dust or impurities it will deposit them upon the platform K
which forms the cover of the upper chamber L which contains the plates C. The
platform K is provided with the walls M by which the material is retained.
In practice however it is found that the air is so thoroughly relieved of its
impurities in passing the plates C that the platform K is of very little practical
utility and that any dust that may fall upon it is of such small quantity that it is
almost unnecessary to provide any special means for removing it as it can at
intervals be easily brushed off when the apparatus is open.
The effect of the expansion of the air in the expansion space Ι may be increased
by making the channels H small in proportion to the rest of the apparatus, and
this effect may be increased by providing the wings O as shown in Figure 2 which
rn

page_text: besides narrowing the channels H act as baffle plates for the air to strike against
and still further tend to remove from the air any impurities it may contain.
These wings however need not necessarily be employed at all. The upper portion
of the walls A as shown in Figure 2 may with advantage be curved round so as to
extend over the edge of the platform K and thus direct the air well over that
platform.
In the modified construction illustrated in Figures 4, 5 and 6 the same
method of operating is followed, but the arrangement of the parts is slightly
altered. The dust-laden air enters the chamber L at B where it meets a baffle
plate N so as to divide the current and prevent it striking the plates at the
centre only. After passing the first rows of plates C the air encounters. a
partition P through an opening P₁ in which it passes and strikes another baffle
plate N and passes a fresh set of plates C from which it passes to the expansion
space or exit I either direct or through another partition P; the opening P' may
be guarded by another baffle plate N. The dotted line x in Figures 4 and 5
indicates the limit of the cover the part I being either entirely open or directly
connected with an air shaft or the like.
In Figure 5 the plates C instead of being arranged across the path of the dust
laden air are placed parallel thereto and the course of the air is diverted so
as to pass between the plates as before, otherwise the construction is similar to
that of Figure 4, the partitions P and baffle plates N being employed in a
similar manner.
In the cross section Figure 6 the boards or plates Q may be employed if desired
to separate the dust deposited by the air before it has passed the plate C and after
it has so passed and if desired a complete separation of the particles may be carried
out by employing two conveyors E one at the bottom as shown and the other at
the junction of the plates Q.
The baffle plates N may if necessary be placed near to the entrance P¹ so as to
constrict the passage N1 between the partition P and the baffle plate thus
compressing the air and intensifying the effect of its liberation into the relatively
large chamber, L.
In Figure 7 this is carried out, the arrangement of the partitions and baffle
plates being the same as in the previous figures, but the plates C are omitted and
it is therefore desirable to place the baffle plates very near to the openings in the
partitions.
In this Specification the plates C have been described as being vertical and we
prefer to place them vertically, but it will be appreciated that a similar result
could be obtained with these plates somewhat slanted or inclined so long as
the falling of the dust was insured. The dust may be removed by shaking or
knocking or by brushes if desired but where the plates are vertically arranged we
find that under normal circumstances the dust will generally fall sufficiently freely
without assistance.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we wish it to be
understood that we make no claim to anything described and claimed in our
previous Specification No. 2680 of 1890, but what we claim is :-
1. In apparatus such as described the combination with the chamber L con-
taining rows of curved plates such as C of an air inlet B channels H and
expansion space I substantially as described and illustrated in the accompanying
drawings.
2. In apparatus such as described the combination of two sets or series of
vertical curved plates such as C with a space between them for the entrance
of the air in an outer case affording passages for the exit of the air after
passing the plates and means for the withdrawal of the dust or impurities
removed from the air substantially as described and illustrated in the accompanying
drawings.

page_text: 3. In apparatus such as described the combination with a chamber such as L
containing one or more sets of curved vertical plates such as C of a lower chamber
such as D communicating with the first chamber and divided by partitions
corresponding with the rows of plates above and a worm or other conveyor
substantially as described.
4. The combination and arrangement of parts constituting the apparatus for
removing dust and similar impurities from air substantially as described and
illustrated in Figure 4 of the accompanying drawings.
5. The combination and arrangement of parts constituting the apparatus for
removing dust and similar impurities from air substantially as described and
illustrated in Figure 5 of the accompanying drawings.
6. The combination and arrangement of parts constituting the apparatus for
removing dust and similar impurities from air substantially as described and
illustrated in Figure 7 of the accompanying drawings.
Dated this 11th day of June 1892.
TOM PARKINSON.
GEORGE MARSDEN PARKINSON.
W. P. Thompson & Boult,
-
Agents for the Applicants.