Year: 1888

page_text: I
This Specification was, upon the 7th day of January 1890, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
I HERBERT JOHN HADDAN of the firm of Herbert & Co., Patent Agents of
18 Buckingham Street, Strand W.C. London in the County of Middlesex do hereby
declare the nature of this invention, a communication to me from abroad by the firm
of Seck Brothers of Darmstadt in the Empire of Germany, Manufacturers to be as
follows:-
This invention relates to Middling's purifiers in which an ascending current of air
is caused to pass through a sieve and the object of the invention is to remove from
the sieve such particles as are not entirely withdrawn by the current of air but only.
lifted to a certain height and which, (without this invention) would otherwise fall
repeatedly upon the sieve.
At the required height above the sieve are placed one or more series of suitable
sieves or troughs in which accurately fit revolving screw conveyors for removal from
the machine of the particles fallen in the trough in consequence of the rarefaction of
air taking place within and above these troughs. The particles lifted to the height
of the troughs are prevented from falling back into the sieve by the air currents
ascending with full power through the intervals of the troughs. The aforesaid screws
are driven at equal speed by spur wheels gearing them together one of them being-
operated by power. The height of the troughs above the sieve should be adjustable
and to effect this the troughs are supported in vertically movable frames carrying at
their corners vertical racks with which engage pinions geared for simultaneous
revolution so that the troughs may be evenly raised.
-Ratchet wheels and pawls are provided to hold the pinions and consequently the
racks in the position given to them.
In such a machine the sieve is horizontally movable and the space above the same
is divided into compartments by vertical cross partitions each compartment having
an air outlet communicating with a blower or exhaust fan whereby the air current
may be regulated separately in each compartment.
Dated this 31st day of July 1888.
HERBERT & Co.,
Agents to Applicant.

page_text: COMPLETE SPECIFICATION (AMENDED).
Improvements in Middlings Purifiers.
I EERBERT JOHN HADDAN of the firm of Herbert & Co. Patent Agents of
18 Buckingham Street Strand WC. in the County of Middlesex Civil Engineer
do hereby declare the nature of this invention, a communication to me from abroad
by the firm of Seck Brothers of Darmstadt in the Empire of Germany Manufacturers,
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 middlings purifiers in which an ascending current of air
is caused to pass through a sieve and the object of the invention is to remove
from the sieve such particles as are not entirely withdrawn by the-current-of-air but
only lifted to a certain height and which, without this invention, would otherwise-fall
repeatedly upon the sieve.
Fig. 1 of the accompanying drawing shows a machine provided with such an
arrangement in longitudinal section. Fig. 2 a part of this longitudinal section on av
larger scale. Fig. 3 is an end elevation of the machine and Fig. 4 a part of this
end elevation on a larger scale.
Between the ventilator a which draws a current of air through the sieve b and said
sieve are situated the horizontal parallèl troughs c secured during the working of the
machine. These troughs are arranged at a small distance apart and contain screw
conveyors or preferably flexible wire spirals & which by reason of their flexibility
lie as close to the troughs as possible. One of the wire spirals d is driven direct
by a belt or in any other convenient way and from this wire spiral the motion is
transferred to the other wire spirals by means of toothed wheels e of equal size. The
partitions ffwhich extend beyond the lower edge of the trough.c enable the current
of air to be regulated for each compartment of the sieve.
The light particles raised by the current of air rise within the compartments
between the troughs c and those which are not carried away by the ventilator a fall
into the troughs c within which a certain rarefaction of air exists.
The wire spirals d remove the particles fallen into the troughs c into the outlet g, of
the machine.
Instead of one single row of troughs there may also be arranged two or, more
rows of troughs above one another preferably with alternate.intervals.
•
In order to be able to catch the raised particles in every case at the proper distance
from the sieve according to the different nature of the substance heated treated
mechanism is provided, to bring the troughs within the necessary distance of the
the sieve band to secure the same at said distance for working.
Any movement of the troughs c during the working of the machine would influence to
disadvantage the catching up of the particles of the substance by the troughs. The ends
of the axles of the wire spirals d are journalled on each side in a plate t common to all
and this plate is connected to a second plate t¹ (Fig. 2) by stay bolts or otherwise to
form a frame which likewise carries the ends of the tronghs c and can be moved up
and down within a vertical opening of the frame of the machine.

page_text: On each of the two plates t are connected or made two racks y into which gear the
toothed pinions
zz on the same shaft wo which is journalled in the bearings 111
secured to the frame and carries also a ratchet wheel s. and a hand crank k.
The ratchet wheel is provided with the pawl o. By turning the crank, the plates t
and therefore the troughs c are raised or lowered. The teeth of the ratchet wheels s
of the two shafts w are provided with numbers that it may be more easily perceived
whether both ends of the troughs are on the same level.
The lower parts of the partitions are loosely connected with their upper parts f by
screw bolts and vertical slots so that they can slide with the displacement of the
troughs upon which they rest.
I do not claim broadly to arrange troughs in the space above the sieve of a middlings
purifier for the purpose of receiving material carried up by the current of air ascending
through the sieve, nor do I contemplate as an invention at the present time the rarefaction
of the air which takes place in the space immediately above such troughs, since the former
proceeding is shown and the latter result is a natural outcome of the mechanism
illustrated and described in the Specification of Letters Patent No. 1579 of
22nd April 1879; but
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is
In middlings purifiers,
1. The combination with a sieve and an air aspirator adapted to draw or force air
up through said sieve, of a series of troughs above said sieve, for receiving fallen
partieles not carried off by said aspirator.
2. The combination with a sieve and an air aspirator adapted to draw or force air
up through said sieve of a series of troughs above said sieve with wire spirale or
screw conveyors-therein for receiving falling particles not carried off by said aspirator
and removing same from the machine.
3. 1. The combination with a horizontal sieve and an air aspirator adapted to draw
or foree air up through said sieve, of a series of longitudinal horizontal troughs above
said sieve and a series of vertical transversal partitions dividing the space above said
sieve substantially as and for the purpose set forth.
4. The combination with a sieve or perforated floor upon which the material to be
eleaned is caused to rise by current of air, of a series of troughs adjustable in distance
abovesaid sieve or perforated floor for the purpose set forth.
2. The combination with a the series of adjustable longitudinal horizontal troughs
of the mechanism substantially as described for whereby the raising or lowering of the
series and for the holding of the same is permitted.
5331
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.

page_text: I HERBERT JOHN HADDAN of the firm of Herbert & Co., Patent Agents of
18 Buckingham Street, Strand W.C. London in the County of Middlesex do hereby
declare the nature of this invention, a communication to me from abroad by the firm
of Seck Brothers of Darmstadt in the Empire of Germany, Manufacturers to be as
follows:-
This invention relates to Middling's purifiers in which an ascending current of air
is caused to pass through a sieve and the object of the invention is to remove from
the sieve such particles as are not entirely withdrawn by the current of air but only
lifted to a certain height and which, (without this invention) would otherwise fall
repeatedly upon the sieve.
At the required height above the sieve are placed one or more series of suitable
sieves or troughs in which accurately fit revolving screw conveyors for removal from
the machine of the particles fallen in the trough in consequence of the rarefaction of
air taking place within and above these troughs. The particles lifted to the height
of the troughs are prevented from falling back into the sieve by the air currents
ascending with full power through the intervals of the troughs. The aforesaid screws
are driven at equal speed by spur wheels gearing them together one of them being
operated by power. The height of the troughs above the sieve should be adjustable
and to effect this the troughs are supported in vertically movable frames carrying at
their corners vertical racks with which engage pinions geared for simultaneous
revolution so that the troughs may be evenly raised.
Ratchet wheels and pawls are provided to hold the pinions and consequently the
racks in the position given to them.
In such a machine the sieve is horizontally movable and the space above the same.
is divided into compartments by vertical cross partitions each compartment having
an air outlet communicating with a blower or exhaust fan whereby the air current.
may be regulated separately in each compartment.
Did this 21st dow of Inly 1888
HERBERT & CO.,
Agents to Applicant.

page_text: I HERBERT JOHN HADDAN of the firm of Herbert & Co. Patent Agents of
18 Buckingham Street Strand W.C. in the County of Middlesex Civil Engineer
do hereby declare the nature of this invention, a communication to me from abroad
by the firm of Seck Brothers of Darmstadt in the Empire of Germany Manufacturers,
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 middlings purifiers in which an ascending current of air
is caused to pass through-a-sieve and the object of the invention is to remove
from the sieve such particles as are not ontirely withdrawn by the current of air but
only lifted to a certain height and which, without-this invention, would otherwise fall.
repeatedly upon the sieve."
Fig. 1 of the accompanying drawing shows a machine provided with such an
arrangement in longitudinal section. Fig. 2 a part of this longitudinal section on a
larger scale. Fig. 3 is an end elevation of the machine and Fig. 4 a part of this
end elevation on a larger scale.
Between the ventilator a. which draws a current of air through the sieve 6 and said
sieve are situated the horizontal parallel troughs c secured during the working of the
machine. These troughs are arranged at a small distance apart and contain screw
conveyors or preferably flexible wire spirals d which by reason of their flexibility
lie as close to the troughs as possible. One of the wire spirals d is driven direct
by a belt or in any other convenient way and from this wire spiral the motion is
transferred to the other wire spirals by means of toothed wheels e of equal size. The
partitions which extend beyond the lower edge of the trough c enable the current
of air to be regulated for each compartment of the sieve.
The light particles raised by the current of air rise within the compartments
.between the troughs c and those which are not carried away by the ventilator a fall
into the troughs c within which a certain rarefaction of air exists.
d
The wire spirals & remove the particles fallen into the troughs e into the outlet g of
the machine.
Instead of one single row of troughs & there may also be arranged two or more
rows of troughs above one another preferably with alternate intervals.
In order to be able to catch the raised particles in every case at the proper distance
from the sieve according to the different nature of the substance heated, mechanism is
provided, to bring the troughs c within the necessary distance of the the sieve 6 and
to secure the same at said distance for working.
Any movement of the troughs c during the working of the machine would influence to
disadvantage the catching up of the particles of the substance by the troughs. The ends
of the axles of the wire spirals d are journalled on-each side-in a plate t common to all
and this plate-is-connected to a second plate t¹ (Fig. 2) by stay bolts or otherwise to
form a frames which likewise carries the ends of the troughs c and can be moved up
and down within a vertical opening of the frame of the machine.

page_text: gear the
On each of the two plates t are connected or made two racks y into which
toothed pinions zz on the same shaft w which is journalled in the bearings 11
secured to the frame and carries also a ratchet wheel s. and a hand crank k.
The ratchet wheel is provided with the pawl o. By turning the crank the plates t
and therefore the troughs c are raised or lowered. The teeth of the ratchet wheels
of the two shafts w are provided with numbers that it may be more easily perceived
whether both ends of the troughs are on the same level.
The lower parts f¹ of the partitions are loosely connected with their upper parts by
screw bolts and vertical slots so that they can slide with the displacement of the
troughs upon which they rest.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is
In middlings purifiers,
1. The combination with a sieve and an air aspirator adapted to draw or force air
up through said sieve, of a series of troughs above said sieve, for receiving fallen
particles not carried off by said aspirator.
2. The combination with a sieve and an air aspirator adapted to draw or force air
up through said sieve of a series of troughs above said sieve with wire spirals or
screw conveyors therein for receiving falling particles not carried off by said aspirator
and removing same from the machine.
3. The combination with a sieve and an air aspirator adapted to draw or force air
up through said sieve, of a series of troughs above said sieve and a series of partitions
dividing the space above said sieve for the purpose set forth.
4. The combination with a sieve or perforated floor upon which the material to be
cleaned is caused to rise by current of air, of a series of troughs adjustable in distance
above said sieve or perforated floor for the purpose set forth.
5. The combination with a series of adjustable "troughs of the mechanism sub-
stantially as described for raising or lowering the series and for holding the same.
Dated this 25th day of April 1890.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.