Improvements in Purifiers for Middlings and other Cereal Products or other Pulverulent Bodies.
Year: 1896

page_text: Date of Application, 16th May, 1896
Complete Specification Left, 13th Feb., 1897-Accepted, 27th Mar., 1897
Improvements in Purifiers for Middlings and other Cereal Products
or other Pulverulent Bodies.
I, HENRY SIMON, of No. 20 Mount Street, Manchester, in the County of
Lancaster, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
In purifiers such as made and at present in use in the advanced milling art, it
has always been felt a great drawback that the dust raised in these purifiers
attaches itself to the inside of the windows provided for inspection of the working
of the machine.
Moreover it has heretofore been found impossible to allow of free and easy access
to and inspection of the upper side of the sieve or the grids or other apparatus
provided for catching the impurities lifted by the wind.
My invention relates to a construction and arrangement of the channels and
surfaces for collecting the fine particles and dust carried up by the air current in
such a manner as to reduce the amount of dust raised within the machine; to
render the air issuing from the machine more dustless ;-to maintain greater
cleanliness on the inside of the inspecting windows:-and to give greater facilities
for thoroughly inspecting the sieve.
Over the sieve there is usually placed a series of parallel channels, sometimes
longitudinal and sloping down from the feed end but more generally rectangularly
transverse to the sieve, and inclining from the middle down to collecting channels
at the sides of the sieve. According to my present invention, I make these
channels shallow and very near to the sieve, without any slope in reference to the
sieve down from the end or middle, and therefore at the same height above the
sieve throughout, but, instead of making them either longitudinal or rectangularly
transverse, I give them a diagonal position directing them obliquely towards a
single receiving channel at one side of the sieve, into which receiving channel they
deliver the material caught in them. In each channel I place a wire loosely
attached to the end opposite to the receiving channel.
These channels form a complete grid covering the sieve from end to end. I
divide this grid into sections of convenient width, each section being hinged to the
side of the receiving channel and fastened to the sieve at the other side in such a
way that it can be easily unfastened.
I make the lower portions of the partitions which divide the chamber above the
sieve, easily removable or detachable so that on lifting up or removing these lower
parts, which may be hinged at their upper edges, one or more sections of the grid
of channels can be lifted whilst the machine is working, to allow inspection of the
sieve.
With this arrangement, or it may be with other known arrangements of channels,
I introduce in the upper part of the purifier, instead of the second chamber usually
arranged for the collection of the remaining fine dust, several rows of channels or
flat bars inclined diagonally downwards towards the collecting channel at the side
of the sieve, with spaces between the channels and between the several rows of
channels.
These inclined channels or bars catch the bulk of the remaining fine dust on
their upper sides and deliver it into the side collecting channels.

page_text: The inclination of the dust catching apparatus to one side only has the great
advantage of leaving the window on the opposite side much cleaner than heretofore,
all the dust being delivered towards the side collecting channel.
The elevation of the upper dust catching channels or bars on the side opposite
to where they deliver has the great advantage of leaving a large open space above
the sieve and grid of channels so that they are always open to inspection through the
glass window.
The machine thus arranged with only one side collecting channel, presents the
great advantage of allowing easy inspection of the important working parts, the
sieve and the grid of channels, without interrupting the working of the machine.
The dustlessness of purifiers, which is a point of great importance to millers, is
thus obtained, not by employing imperfect apparatus for catching the dust with
passages and channels provided with cumbersome brushes ant chains to remove it
when collected, but by arranging the purifying part proper of the machine in such
a way that very little dust is raised.
By arranging the underside of the grid of channels parallel to the silk and
closer to it than they have generally been placed, and by making the sides of the
channels low, the machine can work with less wind pressure than formerly, as the
impurities have to be lifted only a very short distance; consequently excee lingly
little dust is raised at all and this is easily and entirely intercepted by the special
dust catching apparatus above described.
The result is a machine which will work without any specially arranged upper
dust catching chamber and without chains and brushes for cleaning the same.
Dated this 16th day of May 1896.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in Purifiers for Middlings and other Cereal Products
or other Pulverulent Bodies.
I, HENRY SIMON, of No. 20, Mount Street, Manchester, in the County of
Lancaster, Civil 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 :-
In purifiers such as made and at present in use in the advanced milling art, it
has always been felt a great drawback that the dust raised in these purifiers
attaches itself to the inside of the windows provided for inspection of the working
of the machine.
Moreover it has heretofore been found impossible to allow of free and easy access
to and inspection of the upper side of the sieve or the grids or other apparatus
provided for catching the impurities lifted by the wind.
My invention relates to a construction and arrangement of the channels and
surfaces for collecting the fine particles and dust carried up by the air current in
such a manner as to reduce the amount of dust raised within the machine; to
render the air issuing from the machine more dustless; to maintain greater
cleanliness on the inside of the inspecting windows; and to give greater facilities
for thoroughly inspecting the sieve.
I shall describe the construction and arrangements which I adopt for this
purpose referring to the accompanying drawings.
Figure 1 is a longitudinal section and Figure 2 is a transverse section of a
purifier according to my invention.

page_text: Figure 3 is the plan of the grid of dust collecting channels arranged above the
Bieve.
Figure 4 is a section on the line Z-Z of Figure 2 of the inclined channels in
the chambers above the sieve.
Figure 5 is a perspective view of two of the collecting channels.
Figure 6 is a plan of the channels arranged obliquely across the sieve.
A is the silk or sieve which is caused to oscillate and is provided with feed and
discharge arrangements in the usual way. The frame which carries the silk is
made with a recess or receiving channel B at its one side, and over the silk is
arranged either transversely, as shewn in Figure 3, or obliquely, as shewn in
Figure 6, a grid of channels C, each having a flat bottom parallel and very near to
the surface of the silk whilst the upper side of the channel is of trough shape and
preferably made with a slight inclination downwards towards the recess B.
As shewn in Figure 5 each section of the grid of the collecting channels C has
a cross wire c fixed near its upper end and another cross wire c¹ near its lower end.
In each channel there is a longitudinal wire e hooked freely to the upper wire c,
so that, as the sieve and grid of channels vibrate, each of these wires oscillates to
and fro in its channel keeping the particles in it in motion and preventing them
from adhering. The lower cross wire c' prevents the longitudinal wire c² from
jumping out of the channel.
The space above the silk is, as usual, divided by partitions P into a number of
compartments D communicating by valved openings E with upper hopper-shaped
compartments G which communicate with the suction of the fan F.
The grid of channels C is divided into as many sections as there are
compartments D, each section being hinged to the side of the channel B so that
it can be raised to the position indicated by the dotted lines C Figure 2, so as to
give free access to the silk from the side window H which can be opened for that
purpose.
In order to admit of the grid sections being thus raised, the lower parts p of the
partition P are made removable.
Fillets, indicated by the dotted lines f in Figure 2 at the lower edges of the
upper fixed parts of the partitions P serve as stops against which the upper edges
of the removable lower parts p bear when these parts are in place. When it is
desired to raise a section of the grid of channels C, the window H is opened and
the attendant taking hold of handles p' withdraws the movable parts p of the
partitions and removes them through the window, the grid action being thus left
free to be raised.
In each of the compartments D are fixed several rows of steeply inclined
shallow channels K with narrow passages between them so arranged that the air
currents ascending to the upper compartments G as they pass between the channels
of one tier are deflected by the channels of the next higher tier, and as they
expand laterally over each tier they deposit in the channels K such dust or fine
particles as may be suspended in them. The matters thus deposited slide down
the channels K into the collecting channel B, whence they, as well as the matters
received from the channels C, are delivered at the discharge end of the machine.
The air which is almost dustless after passing the channels K passes through
the openings E, which are regulated by valves, into the upper hopper-shaped
compartments G, and expanding in them deposits such dust as may be still carried
by it, and this descends through openings L at the bottom of the compartments G
and falls into the inclined channels K. Each of the openings L is provided with
a slide which usually closes the opening and is withdrawn only when there is an
accumulation of deposit in the compartment.
The inclination of the dust catching apparatus to one side only has the great
advantage of leaving the window on the opposite side much cleaner than heretofore,
all the dust being delivered towards the side collecting channel. The elevation of
the upper dust catching channels or bars on the side opposite to where they deliver

page_text: has the great advantage of leaving a large open space above the sieve and grid of
channels so that they are always open to inspection through the glass window.
The machine thus arranged with only one side collecting channel, presents the
great advantage of allowing easy inspection of the important working parts, the
sieve and the grid of channels, without interrupting the working of the machine..
The dustlessness of purifiers, which is a point of great importance to millers, is
thus obtained, not by employing imperfect apparatus for catching the dust with
passages and channels provided with cumbersome brushes and chains to remove it
when collected, but by arranging the purifying part proper of the machine in such
a way that very little dust is raised.
By arranging the underside of the grid of channels parallel to the silk and closer
to it than they have generally been placed, and by making the sides of the
channels low, the machine can work with less wind pressure than formerly, as the
impurities have to be lifted only a very short distance, consequently exceedingly
little dust is raised at all and this is easily and entirely intercepted by the special
dust catching apparatus above described.
The result is a machine which will work without any specially arranged upper
dust catching chamber and without chains and brushes for cleaning the same.
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. In a purifier for middlings and other pulverulent products a grid of dust
collecting channels each having its lower side parallel and near to the silk and its
upper side preferably slightly inclined towards a collecting channel at one side of
the sieve, the said grid being made in sections each hinged to the side of the
collecting channel, substantially as and for the purpose set forth.
2. In a purifier for middlings and other pulverulent products in combination
with a grid of dust collecting channels situated over the sieve and a collecting
channel at the side of the sieve, in each compartment of the space above the sieve
several tiers of channels steeply sloping down towards the side collecting channel,
substantially as described.
Dated this 13th day of February 1897
ABEL & IMRAY,
Agents for the Applicant.