Improvements in Purifiers employed by Millers.
Year: 1891

page_text: Date of Application, 14th Aug., 1891
Complete Specification Left, 14th May, 1892-Accepted, 9th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Purifiers employed by Millers.
We,, ROBERT SIMPKIN PIERCY of 7 Ripon Street, Blackburn in the County
of Lancaster, Millers Millwright, and JOHN ROBINSON. BERTWISTLE, of
42 Commercial Road, Great Harwood in the County aforesaid, Joiner, do hereby
declare the nature of this invention to be as follows:-
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This invention relates to "purifiers employed by millers in the removal of
light impurities from semolina middlings or other like substances, by the use of
improved apparatus hereinafter described; increased utility from the exhaust draft
of such machines with a better general result, that is to say a nearer approach to
complete separation or division of the several ingredients of the material under
operation, is obtained, the light impurities being removed with minimum loss.
According to this, our said invention we employ a creeper consisting of wooden
laths spaced at a distance from each other and secured to leather straps passing
over pulleys and; travelling the same way as the material to be treated on the sieve
and carrying all light material to the tail end of machine which is cleansed off or
removed by a brush and falls into a cross worm by which it is conveyed to a spout
to the offal. receiver. The said creeper travels upon longitudinal bars of a
triangular shape,. the length of each sieve and the said bars being fixed with flat
side under the creeper and their angle. to the silk thereby forming channels from
end to end of the sieve. The above bars are fixed at a distance of about
from each other and are about 3 inch on face to creeper and 1 inch deep to the
sieve:
inch
The creeper and bars are not in any way fixed to sieve but are in a box about.
12 inch. deep, the. said box being suspended by chains and pulleys and lifted or
lowered at will by means of a shaft with ratchet wheel and handle. The above box
forming, a part of the side of machine from air chamber to surface of silk and when
the box is lifted up,enables the silk to be examined or sieves changed in a moment.
The speed of the creeper is about 4 ft. per minute and whilst the machine is in
motion a separate current of air can be given to each sieve as required and there is
provided: above each sieve a long drawer which can be drawn out by the attendant
at any time for inspection of. the light material extracted and as a guide as to
whether the exhaust drauglit is correctly adjusted to requirements. Further we
divide the sieve into several sections or compartments by strips of wood placed
longitudinally and parallel to the edges of the sieve, the said strips being placed
nearer to each other and of increased width nearer the delivery ends, there is thus
less silk surface and a uniformity in the feed is ensured, because the latter becomes
thinner there, is less sieve surface and a purification is in operation during the
whole length of the surface.
The improvements are applicable to existing machines and the fan can be made.
to blow into the open room or filterer as required, the impurities cannot accumulate
the apparatus being, automatic and requiring little driving power and is effective in
treatinent, of the finest dunst or the coarsest semolina.
Dated this 13th day of August 1891.
WALTER BRIERLEY,
Bank Chambers, Waterhouse Street, Halifax, Agent for the Applicants.

page_text: COMPLETE SPECIFICATION
Slymot
Improvements in, Purifiers employed by Millers.
We, ROBERT SIMPKIN PIERCY of 7 Ripon Street, Blackburn in the County
of Lancaster, Millers Millwright, and JOHN ROBINSON BERTWISTLE of
42 Commercial Road, Great Harwood in the County aforesaid," Joiner; 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 "purifiers" employed by millers in the removal of
light impurities from semolina middlings or other like substances by the use of
improved apparatus hereinafter described increased utility from the exhaust draft
of such machines with a better general result, that is to say a nearer approach to
complete separation or division of the several ingredients of the material under
operation is obtained the light impurities being removed with minimum loss.
According to this our said invention we employ a creeper consisting of wooden
laths spaced at a distance from each other and secured to leather straps passing
over pulleys and travelling the same way as the material to be treated on the sieve
and carrying all light material to the tail end of machine which is cleansed off ör
removed by a brush and falls into a cross worm by which it is conveyed to a
spout to the offal receiver. The said creeper travels upon longitudinal bars of a
triangular shape the length of each sieve and the said bars being fixed with flat side
under the creeper and their angle to the silk thereby forming channels from end
to end of the sieve. The above bars are fixed at a distance of about' inch from
each other and are about 3 inch on face to creeper and 14 deep to the siève.
The creeper and bars are not in anyway fixed to sieve but are in a box about
12 inch deep, the said box being suspended by chains and pulleys and lifted and
lowered, at will by means of a shaft with ratchet wheel and handle. The above
box forming a part of the side of machine form air chambers to surface of silk and
when the box is lifted up enables the silk to be examined or sieves changed in a
moment. The speed of the creeper is about 4 ft. per minute and whilst' the
machine is in motion a separate current of air can be given to each sieve as
required and there is provided above each sieve a long drawer which can be drawn
out by the attendant at any time for inspection of the light material extracted and
as a guide as to whether the exhaust draught is correctly adjusted to requirements.
Further we divide the sieve into several sections or compartments by strips of wood
placed longitudinally and parallel to the edges of the sieve, the said strips being
placed nearer to each other and of increased width nearer the delivery ends, tliere
is thus less silk surface and a uniformity in the feed is ensured because as the
latter becomes thinner there is less sieve surface and a purification is in operation
during the whole length of the surface.
The improvements are applicable to existing machines and the fan can be made
to blow into the open rooni or filterer as required, the impurities cannot accumulate
the apparatus being automatic and requiring little driving power and is effective in
treatment of the finest dunst or the coarsest semolina.
Such being the nature and object of our said invention the following, is' a' complete
description of same reference being had to the accompanying drawings, forming a
part of this Specification in which,
Fig. 1 is a side elevation of machine of the class to which this invention is
applicable.
1 ++
Fig. 2 is an end elevation of part of the machine.
Fig. 3 is a plan view shewing sieve frame and creeper.
Fig. 4 is a plan of part of sieve.
+
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Fig. 5 is a cross section shewing silk sieve frame
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page_text: OD
is an enarged detail.
Fig. 7 is plan view of bars detached.
At 1 is a creeper consisting of laths of wood carried on straps of leather running
pulleys 2 the material being cleared off by the stationary brush 3 into the
worm 4, at 5 are bars on which the creeper travels the creeper and bars work in
the box 6 which can be raised at will by chain and ratchet wheels 7 into
chamber 7" so affording facilities for inspection or change of sieve 8 a long drawer 9
is above each sieve 8 which drawer may be pulled out at will, for inspection of the
material and from which to judge whether any readjustment of the draught is
necessary. The sieve 8 is divided by strips of wood 10 into sections or compart-
ments 11 said strips being of increasing width as nearing the delivery end, so as to
decrease the sieves surface as the quantity of material to be treated becomes less
and by dividing the sieve (of wide or narrow machines) into sections or cbannels
corresponding with the longitudinal bars varied according to the material to be
treated the "feed" or supply of material to be treated is evenly distributed over
the whole surface of the sieve effecting the perfect separation of the materials.
By the above arrangement of travelling creeper for conveying all light impurities
to the tail end of the machine and the creeper being independent of the sieve frame
not any extra weight is added to the sieve frame and there is less wear and tear of
the working parts and inspection is afforded, and the operator, without removing
parts or taking away doors by a simple device can lift the creeper bodily from the
surface of the silk and examine or change the sieve when necessary whilst the
machine is in motion. Fast running fans are dispensed with and can be blown into
the open thereby saving trunk and dust collector and each sieve is provided with a
separate air current.
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 machine for purpose aforesaid the creeper 1 operated and operating as
described together with the bars 5 and for purpose set forth.
2. The silk or sieve 8 and the divisional graduated laths 10 in combination for
purpose herein fully described and substantially as illustrated by annexed
drawings.
3. A creeper such as 1 and graduated divisional laths such as 10 for purpose
herein set forth and as described.
herein set forth and as described.
Dated this 13th day of May 1892.
By their Agent,
WALTER BRIERLEY,
Bank Chambers, Waterhouse Street, Halifax: