Improvements in Grain Millers' Purifiers.
Year: 1891

page_text: Date of Application, 12th Aug., 1891
Complete Specification Left, 12th May, 1892-Accepted, 18th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Grain Millers' Purifiers.
We, WILLIAM WINSLADE, of Harpur Street, Penarth Road, Cardiff, in the
County of Glamorgan, Miller, and WILLIAM MARTIN, of 16 Llantwit Street,
Cathays, Cardiff, aforesaid, Miller, do hereby declare the nature of this invention
to be as follows:-
This invention relates to appliances used in milling for purifying middlings,
semolina and the like. In the purifier in which this invention consists there is
carried above the usual silk sieve a series of trays extending lengthwise through
the machine and hinged towards the lower end to troughs bolted or otherwise
secured to stays secured at each side to metallic supports adjustable vertically at
each end in the frame. At or about midway between the sides the appliance is
divided by a partition which extends to the usual exhaust fan and is capable of
being raised or lowered with outside supports. The current drawn through the
sieve is thus divided into two sections. The trays on one side of the central
partition are turned in the opposite direction to those on the other side. At their
upper ends the trays are secured to rods which are adjustable in slots provided for
them in the ends of the frame. The trays are lowered or raised on their hinges to
vary, at any point or points, the exhaust current, according to the nature of the
ground grain being purified. Any impurities raised by the fan from the silk sieve
and afterwards falling back are received either on the backs of the trays or in the
troughs to which they are, as aforesaid, hinged. The collected impurities are
removed from the troughs and trays by travelling brushes or by other suitable
means.
Equalization of the purifying draught is assisted by vertical partitions situated
at equal distances apart and extending downwards from the stays which carry the
troughs and trays to near the silk sieve. The stays aforesaid are hinged near the
centre of the appliance and are capable of being raised on their hinges to afford
access to the silk sieve when required. The air check at the sides covering the
space provided for straining the silk is preferably made of iron and is of reduced
thickness as compared with wooden air checks such as are usually employed.
Consequently, the trays may, if desired, be made to approach nearer to the silk
sieve which extends the whole width of the appliance.
Dated this 11th day of August 1891
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Agent.
COMPLETE SPECIFICATION.
Improvements in Grain Millers' Purifiers.
We, WILLIAM WINSLADE, of 14 Harpur Street, Penarth Road, Cardiff, in the
County of Glamorgan, Miller, and WILLIAM MARTIN, of 16 Llantwit Street,
Cathays, Cardiff, aforesaid, Miller, 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 relates to appliances used in milling for purifying middlings,
semolina and the like. In the purifier in which this invention consists there is
carried above the usual silk sieve a series of curved trays extending lengthwise
through the machine and hinged at the lower end to troughs bolted or otherwise
Price 8d 1

page_text: secured to stays carried at each end on cast iron plates adjustable in the frame.
At or about midway between the sides the appliance is divided by a partition
capable of being raised and lowered. The trays on one side of the central partition
are turned in the opposite direction to those on the other side. At their upper
ends the trays are secured to rods which are adjustable in slots provided for them
in the ends of the machine. The. trays are lowered or raised on their hinges to
vary at any point or points the exhaust current according to the nature of the
ground grain being purified. Impurities raised by the fan from the silk sieve and
afterwards falling back are received either on the backs of the trays or in the
troughs to which the trays are, as aforesaid, hinged. The collected impurities are
removed from the troughs and trays by travelling brushes, or by other suitable
means.
Equalization of the purifying draught is assisted by vertical partitions situated
at equal distances apart and extending downwards below the troughs and trays to
near the silk sieve. The stays aforesaid are hinged near the centre of the appliance
and are capable of being raised on their hinges to afford access to the silk sieve
when required. The air check at the sides covering the space provided for
straining the silk is preferably made of iron and is of reduced thickness as compared
with wooden air checks such as are usually employed. Consequently, the trays
may, if desired, be made to approach nearer to the silk sieve which extends the
whole width of the appliance.
In the accompanying sheets of drawings
Fig. 1 represents a transverse section of our improved apparatus for purifying
middlings, semolina and the like.
Above the usual silk sieve a is a series of curved trays extending lengthwise
throughout the machine and hinged as at to troughs bolted or otherwise
secured to stays d. These stays, which are arranged at suitable distances apart
throughout the length of the series of trays band troughs e, are carried at cach
end on ledges projecting from the cast iron plates e. At or about midway the
appliance is divided throughout, above the trays by a partition secured at foot
to the stays d. The trays and troughs on one side of the central partition / are
turned in the opposite direction to those on the other side. At their upper ends
the trays are fitted with rods g which are capable of being withdrawn longitudinally.
They are also capable of adjustment, by means of clamping screws provided on the
rods in slots provided in the end plates e. At Fig. 1 of the drawings the
trays on one side of the partition fare shown raised on their hinges to their full
height and that part of the sieve a which is below them is acted upon by the full
draught of the suction fan which draws the air in at the usual inlets and
thence through the sieve a to the apertures h¹ by which communication with the
fan is established.
At the other side of the partition of the trays are shown lowered to the fullest
extent permitted by the slots in the end plates e thus reducing the current
exerted on that part of the sieve a which is below them. It will be seen that by
adjusting the trays on their hinges to various positions the force of the current
acting on the sieve is varied accordingly and may be equalized across the entire
sieve or a part thereof.
Such refuse as returns after passing above the trays descends either on the backs
of the trays or into the troughs c whence it is removed by the brushes i carried
on endless chains working round pullies at each end of the machine.
Regulation and division of the air current are further assisted by the vertical
partitions extending downwards from the bottoms of the troughs c to below the
stays d as shown.
The stays d, trays b, troughs & and end plates e are capable of vertical adjustment
as a body towards or from the sieve a by means of the adjusting nuts and screwed
bolts m which latter are fixed at the lower ends to the end plates e.so that by
turning the nuts I accordingly the plates e are made to rise or fall in channels
provided in the frame of the machine. Adjustment of the end plates e may be

page_text: effected by racks and pinions instead of by nuts. Or any other known means for
adjusting may be adopted.
The stays d are hinged near the centre of the appliance to a centre piece d'
Upon their hinges the stays are capable of being turned, as seen at Fig. 2, for the
purpose of obtaining access from above to the sieve a.
The air checks n covering the space o provided at each side to allow for straining
the silk sieve a is of iron and is of reduced thickness as compared with wooden air
checks such as are usually employed. Hence the stays d with the trays b and
troughs c may be brought nearer to the sieve a when required.
The stays, trays, troughs and end plates are, in the example illustrated,
stationary, but may be arranged to vibrate as a body with the sieve.
Instead of being hinged to the troughs c, as shown, each tray b may be made in
one with its troughs c, and the latter hinged to the stays d so that the troughs and
trays may move together in regulating the air current.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is :-
1. In a machine for purifying semolina, middlings and the like, the provision of
curved trays such as hinged as at to troughs such as c bolted or otherwise
secured to stays such as d with or without vertical plates such as k for dividing the
air current, the trays and troughs extending in longitudinal series throughout the
machine, the trays being capable of being raised and lowered on their hinges and
set in the position to which they are moved, substantially as hereinbefore described
with reference to the accompanying sheet of drawings.
д
2. The vertically adjustable end plates e slotted to carry and permit adjustment
of the rods passed loosely through the upper tubular ends of the trays b, the said
end plates supporting and carrying the stays d, so that the latter with the trays b
and troughs care capable of being raised and lowered as one body towards or from
the sieve, as herein before described and for the purpose specified.
Dated this 10th dox of May 1802
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Chartered Patent Agent.