Improvements in Machines for Separating Light from Heavy Substances.
Year: 1896

page_text: Date of Application, 4th June, 1896-Accepted, 25th July, 1896
COMPLETE SPECIFICATION.
Improvements in Machines for Separating Light from Heavy
Substances.
1, HEINRICH SECK of No. 15 Leubnitzerstrasse, Dresden, in the Kingdom of
Saxony, and Empire of Germany, 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:-
In the machines heretofore generally employed for separating light from heavy
substances, as for instance in the usual middlings purifiers generally used in flour
mills for separating out the dust and other light particles from grits or middlings,
the collecting or conveying gutters for receiving the dust or other light particles and
for conveying them to the discharge end of the machine, are usually arranged
within the sifting chamber, that is to say, within the space which contains the shaking
sieve.
This arrangement presents a number of objections, inasmuch as, on the one hand,
the substances contained in the said gutters are not visible from without when
the glass windows, arranged on the sides of the machine, have become covered with
dust, as will in most cases happen very frequently, and inasmuch as, on the other
hand, it is not possible in that arrangement to keep the portions of material
discharged from the different sections of the machine separated from each other and
to examine each of them separately.
The object of my present invention is to obviate these objections, and the invention,
therefore, consists in the details of construction and combination of parts more fully
hereinafter described and shown, whereby the dust or other light particles, after
having been separated out from the heavier substances within the sifting chamber
of the machine, are deposited in collecting or conveying gutters arranged outside of
the said sifting chamber, and not within the latter as heretofore.
In the preferred form of my invention provision is made for discharging the dust
or other light particles from the different sections of the machine into the said
collecting or conveying gutters in different places, so that the material from the
different sections may be separately observed and controlled at all times, whereas in
the arrangement heretofore generally employed access could only be had to the
collecting and conveying gutters (usually provided on the sides of the shaking sieve)
by opening one of the glass windows on the sides of the machine, and every time
when this was done while the machine was running, the operation of the machine
was thereby interfered with, and even then the gutter would be visible only to the
extent of the length of the opened window.
To enable others skilled in the art to properly understand my improved arrange-
ment I have in the accompanying drawing shown the same as applied to a middlings
purifier of a well known general construction.
Figure is a vertical transverse section on the line x-y, Figure 2, and
Figure 2 is a central vertical longitudinal section.
A designates the sifting chamber of the machine, that is to say, the space above
the usual shaking sieve B. C is the exhaust fan for creating a suction current of
air which passes through the sieve and through the material travelling thereon, from
below, and, on entering the sifting chamber, seizes and carries along with it on its
upward course the dust and other light particles contained in the said material. The
said dust and other light particles are then, as is well known, either deposited on the
deflectors provided in the upper portion of the machine, or on the upper surface of
the "roof" D, whence they are then discharged into the collecting or conveying
gutters heretofore usually arranged on the sides of the shaking sieve, to be therein

page_text: conveyed forward towards the discharge end of the machine, in consequence of the
shaking movement and of the inclined arrangement of the gutters, and there
discharged.
According to my present invention I arrange the collecting or conveying gutters E
outside of the sifting chamber A of the machine, so that the said gutters are freely
accessible and the dust or other light particles collected therein may be observed
and examined at all times. The means provided, in the construction shown, for
receiving the said dust or other light particles in the sifting chamber immediately
after their separation from the material treated and previously to their being conveyed
into the collecting or conveying gutters, consist of the troughs F, preferably arranged
on both sides of the shaking sieve in pairs corresponding with the different sections
of the sifting chamber and having the greater portion of their bottoms inclined
towards the discharge end of the machine as shown.
From each of the said troughs a tube or spout G extends downward into the
collecting or conveying gutter E below, so that the dust or other light particles
from each of the sections of the sifting chamber are discharged separately into the
said collecting or conveying gutters and may be observed and examined separately
therein, while being conveyed therein towards the discharge end of the machine
(on the right hand side of Figure 2) and there discharged as indicated in the
drawing.
The said collecting or conveying gutters may be connected with the shaking sieve
either by being attached to the tubes or spouts G, or they may be secured directly
to the said shaking sieve, so as to participate in the movements of the latter, or
they may be attached to the framing of the machine.
I wish to be distinctly understood that my present invention is not restricted
to the arrangement of my improved collecting or conveying gutters in combination
with just the specific means for separating, depositing and discharging the dust or
other light particles as above described and shown in the drawing, nor in combination
with troughs arranged on the sides of the shaking sieves, but that it would not be
a departure from my invention if other means were provided within the sifting
chamber of a machine of the class referred to, for receiving the dust or other light
particles, and if the latter were discharged from there into one or more collecting
or conveying gutters, the essential feature of my invention being, that the said
collecting or conveying gutters combined with the said other means are arranged
outside of the sifting chamber.
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 separating light from heavy substances the combination,
with a sifting chamber having therein a sieve and means for separating out and
receiving dust or other light particles, of one or more collecting or conveying
gutters arranged outside of the said sifting chamber, and of means for discharging
into the said gutters the dust or other light particles from within the said sifting
chamber, substantially as and for the purpose described.
2. In a machine for separating light from heavy substances the combination, with
a sifting chamber, having therein means for separating out dust or other light
particles, and containing a shaking sieve with lateral troughs secured thereto for
receiving the dust or other light particles, of one or more conveying gutters arranged
outside of the said sifting chamber, and of means for discharging the dust or other
light particles into the said gutters from the said lateral troughs, substantially as
and for the purpose described.
DL:
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.