Improvements in Sieve Apparatus_for_Dressing and Purifying Meal and other Products.
Year: 1893

page_text: Date of Application, 9th June, 1893
Complete Specification Left, 9th Mar., 1894-Accepted, 14th Apr., 1894
LUTIDIONAL MOTIVATION.
Improvements in Sieve Apparatus_for_Dressing and Purifying Meal
and other Products.
We, ALFRED WATKINS, Master Miller, and JAMES WATT, Foreman Miller,
both of The Imperial Flour Mills, Hereford, do hereby declare the nature of this
invention to be as follows :-
Our invention relates to sieve apparatus in which a flat sieve suspended by
flexible hangers receives an excentric circular motion by means of a vertical shaft.
According to our present improvement we mount upon such vertical shaft a fan of
any suitable known construction, such fan having the object of either drawing the
moist air away from the granular material treated on the sieve, such as in so called
rotary scalpers" in which the break meal is dressed in flour mills, and where the
fan serves to ventilate the sieve chamber, and the break rolls acting in connection
therewith; or, when applied to middlings purifiers, the said fan is made to draw
the air through the meal on the sieve and thus to carry off the finer particles and
injurious matter that requires to be removed.
In either case the discharged air is dealt with in the usual manner.
Dated this 9th day of June 1893
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Sieve Apparatus for Dressing and Purifying Meal
and other Products.
We, ALFRED WATKINS, Master Miller, and JAMES WATT, Foreman Miller,
both of The Imperial Flour Mills, Hereford, 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 :-
Our invention relates to sieve apparatus in which a flat sieve suspended by
flexible hangers receives an excentric circular motion by means of a vertical shaft.
According to our present improvement we mount upon such vertical shaft a fan of
any suitable known construction, such fan having the object of either drawing the
moist air away from the granular material treated on the sieve, such as in so called
rotary scalpers" in which the break-meal is dressed in flour mills, and where the
fan serves to ventilate the sieve chamber, and the break rolls acting in connection
therewith; or, when applied to middlings purifiers, the said fan is made to draw the
air through the meal on the sieve and thus to carry off the finer particles and
injurious matter that requires to be removed.
66
In either case the discharged air is dealt with in the usual manner.
On the accompanying drawing we have shewn the application of the invention
by way of example, to a "Rotary Break Meal Scalper."
Fig. 1 shews a cross section and Fig. 2 a longitudinal section.
A is the sieve apparatus of ordinary construction, suspended by straps or
cords B or other means from the framing C, of the sieve chamber and receiving
a horizontal excentric circular motion in the known mauner by a crank or
excentric D on the vertical driving shaft E.

page_text: On this shaft are fixed the blades of a centrifugal fan F the casing of which is
suitably carried by the framing, and which has a central opening at top, through
which the moist air of the sieve chamber is drawn in by the action of the fan,
which propels it through the discharge flue F¹ to be dealt with in the ordinary
manner.
Our invention is applicable in a precisely similar manner to the rotary sieves of
purifying machines that are driven by a vertical shaft, in which case, as before
stated the air drawn in by the fan is made to pass through the meal on the sieve
so as to draw off the lighter particles, which are deposited in chambers or on trays
in a well known manner.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
The combination with horizontal sieves for sifting or purifying meals and other
products, of a centrifugal air fan fixed on the vertical driving shaft of such sieves
for the purposes herein described.
ABEL & IMRAY,
Agents for the Applicants.