Improvements in Apparatus for Separating Impurities from Sugar.
Year: 1891

page_text: Date of Application, 19th Nov., 1891
Complete Specification Left, 17th Aug., 1892-Accepted, 17th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Separating Impurities from Sugar.
I, JAMES DRUMMOND, of 3, Bloomfield Terrace, Govan, in the County of
Lanark, North Britain, Engineer, do hereby declare the nature of this invention to
be as follows, that is to say :-
My said invention has for its object the purifying of sugar, or the separating
of impurities therefrom, in a better and more economical manner than heretofore,
and by means of apparatus of a simple kind and small cost.
In carrying out my invention I place the impure but crystallised sugar upon
a suitable perforated plate (such for example as is used in pulp strainers) and
I apply compressed air upon the sugar, the air driving the molasses or impure
syrup from the sugar through the perforated plate into a receptacle below.
In order to carry on the operations in a practically continuous manner I arrange
the perforated plate, or a series of perforated plates in a circular or annular
form, and impart to it a continuous or intermittent movement round its axis which
is vertical. At one part of the circuit the sugar is fed upon the plate from a
hopper or in any convenient way; and the movement of the plate first takes it
under an adjustable bar which gauges the depth or thickness of the layer of
sugar passing on. The sugar next enters an enclosed chamber in which the com-
pressed air is applied to it; and in the same chamber or in a further chamber
pure syrup may be applied to it and forced through by compressed air to complete
the purification. As the sugar is carried onwards by the plate it encounters a
stationary deflecting guide or scraper, which causes it to pass off the plate into
a delivery shoot. In connection with the receptacle under the perforated plate
or series of plates, pipes or channels are provided for leading away the impure
syrups, separate pipes or channels being by preference arranged for the different
grades of syrup.
Instead of a circular horizontal plate or series of plates, there may be used an
endless apron of wire cloth or other suitable permeable material, or an endless
series of perforated plates connected together and arranged to pass round horizontal
rollers.
Dated this Eighteenth day of November 1891
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Separating Impurities from Sugar.
I, JAMES DRUMMOND, of 3, Bloomfield Terrace, Govan, in the County of
Lanark, North Britain, 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, that is to say:—
My said invention has for its object the purifying of sugar, or the separating of
impurities therefrom, in a better and more economical manner than heretofore, and
by means of apparatus of a simple kind and small cost.
In carrying out my invention I place the impure but crystallised sugar upon a
suitable perforated plate and I apply compressed air upon the sugar, the air driving
the molasses or impure syrup from the sugar through the perforated plate into
a receptacle below.
And in order that my said invention and the manner of performing the same may

page_text: Date of Application, 19th Nov., 1891
Complete Specification Left, 17th Aug., 1832-Accepted, 17th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Separating Impurities from Sugar.
I, JAMES DRUMMOND, of 3, Bloomfield Terrace, Govan, in the County of
Lanark, North Britain, Engineer, do hereby declare the nature of this invention to
be as follows, that is to say:
My said invention has for its object the purifying of sugar, or the separating
of impurities therefrom, in a better and more economical manner than heretofore,
and by means of apparatus of a simple kind and small cost.
In carrying out my invention I place the impure but crystallised sugar upon
a suitable perforated plate (such for example as is used in pulp strainers) and
I apply compressed air upon the sugar, the air driving the molasses or impure
syrup from the sugar through the perforated plate into a receptacle below.
In order to carry on the operations in a practically continuous manner I arrange
the perforated plate, or a series of perforated plates in a circular or annular
form, and impart to it a continuous or intermittent movement round its axis which
is vertical. At one part of the circuit the sugar is fed upon the plate from a
hopper or in any convenient way; and the movement of the plate first takes it
under an adjustable bar which gauges the depth or thickness of the layer of
sugar passing on. The sugar next enters an enclosed chamber in which the com-
pressed air is applied to it; and in the same chamber or in a further chamber
pure syrup may be applied to it and forced through by compressed air to complete
the purification. As the sugar is carried onwards by the plate it encounters a
stationary deflecting guide or scraper, which causes it to pass off the plate into
a delivery shoot. In connection with the receptacle under the perforated plate
or series of plates, pipes or channels are provided for leading away the impure
syrups, separate pipes or channels being by preference arranged for the different
grades of syrup.
Instead of a circular horizontal plate or series of plates, there may be used an
endless apron of wire cloth or other suitable permeable material, or an endless
series of perforated plates connected together and arranged to pass round horizontal
rollers.
Dated this Eighteenth day of November 1891
EDMUND HUNT,
Applicant's Agent.
COMPLETE
SPECIFICATION.
Improvements in Apparatus for Separating Impurities from Sugar.
I, JAMES DRUMMOND, of 3, Bloomfield Terrace, Govan, in the County of
Lanark, North Britain, 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, that is to say :-
My said invention has for its object the purifying of sugar, or the separating of
impurities therefrom, in a better and more economical manner than heretofore, and
by means of apparatus of a simple kind and small cost.
In carrying out my invention I place the impure but crystallised sugar upon a
suitable perforated plate and I apply compressed air upon the sugar, the air driving
the molasses or impure syrup from the sugar through the perforated plate into
a receptacle below.
And in order that my said invention and the manner of performing the same may
TD 77

page_text: be properly understood I hereunto append a sheet of explanatory drawings to b
hereinafter referred to and showing my improved apparatus.
Figure, 1, of the drawings is a plan and Figure, 2, is a side elevation partly in
vertical section of the apparatus.
Figures, 3 and 4, are vertical sections of separate parts of the apparatus.
In these drawings the same reference letters and numerals are used to mark the
same or like parts wherever 'they are repeated.
In order to carry on the operations in a practically continuous manner the part
of the apparatus in which the sugar is first treated and which is shown at the
right-hand sides of Figures, 1, and 2, and in Figure, 3, comprises a castiron casing
and framing, the framing carrying a first-motion shaft, B, on which there is a
worm, C, gearing with a worm wheel, D, on one end of a shaft, E, carried in
bearings in a bracket, F, and acting through bevil wheels, G, on a vertical
shaft, H 1, on which is keyed a disk, J, carrying a perforated plate, A 1, or an
annular series of perforated plates. At one part of the circuit the sugar is fed
upon the plate, A. i, from a hopper, K 1, down a shoot, L, in which works a screw
feeder, M, driven by bevil wheels, N, from the shaft, B, and the movement of the
plate, A 1, first takes the sugar under a vertical slide, P 1, which is adjustable by
means of a, screwed spindle, Q, and which gauges the depth or thickness of the
layer of sugar passing onwards. The sugar enters a chamber, R 1, in which, com-
pressed air is applied to it, the air being admitted to the chamber, R 1, through a
pipe, S1, fitted with a regulating valve, T 1, and leading from a main supply
pipe, U. A perforated plate, V 1, which is fixed across the upper part of the
chamber, R. 1, distributes the air equally over the top of the sugar in the chamber.
The sugar next passes under another adjustable vertical slide, P2, into a second
chamber, R2, in which it is subjected to further treatment by compressed air
entering by a pipe, S 2, fitted with a regulating valve, T 2. In this chamber, R 2,
or in a further chamber, pure syrup may be applied to the sugar and forced through
by compressed air to assist the purification. As the sugar is carried onwards by
the plate, A 1, it passes under a third slide, P3, which prevents air escaping over
the top of the sugar after which it is by a stationary deflecting guide or scraper, W,
caused to pass off the plate into a delivery shoot, XI. A receptacle, Y 1, is pro-
vided under the plate, A. 1, and may have connected to it pipes or channels for
leading away the impure syrups, separate pipes or channels, being, if preferred,
arranged for the different grades of syrup.
The sugar is delivered by the shoot, X 1, into a hopper, K2, leading it into one
or other of a number of chambers, R 3, formed in a ring or annular piece, J1, and
fitted with perforated plates, A 2; at their inner ends. The annular piece, J 1,
is formed on the outer part of a disk, J 2, which is keyed on a shaft, H 2, and
made to rotate by means of worm and worm wheel gearing, D1, from a shaft, B 1.
As each of the chambers, R 3, filled with sugar comes under a chamber, R 4, in the
top of the machine, compressed air is applied to the sugar being admitted to the
chamber, R4, through a pipe, 'S 3, fitted with a regulating valve, T3, and leading
from the main supply pipe, U. A perforated plate, V2, distributes the air equally
over the top of the sugar in the chamber, R3. The impure syrups are forced
through the perforated plates, A 2, in the bottom of the chambers, R3, into a
receptacle, Y2, and may be led away in any of the ways indicated as applicable to
the first part of the apparatus. The sugar may if desired be further acted on by
compressed air by providing in this machine another chamber or chambers such
as, R 4, and a pipe or pipes for supplying compressed air thereto.
The sugar is
finally by the rotation of the annular piece, J 1, carried round and discharged on
to a delivery shoot, X 2.
Either or both parts of the apparatus may be constructed like what is herein-
before described as the 'first part or like what is described as 'the second part.
Instead of using a perforated plate of circular form there may be used an endless
apron of wire cloth or other suitable permeable material or an endless series of
perforated plates connected together and arranged to pass round horizontal rollers.

page_text: 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 :-
The improved apparatus for separating impurities from sugar in which it is
moved continuously through and in which it is treated in chambers having bottoms
closed by perforated plates or wire cloth or other suitable permeable material,
by applying compressed air upon the top of it to drive the impure syrups from
it through the perforated plates or permeable material the parts being arranged
and operating substantially as hereinbefore described.
Dated this Sixteenth day of August 1892.
EDMUND HUNT,
Applicant's Agent.