Improvements in Apparatus for Cleaning and Polishing Malt or Grain.
Year: 1889

page_text: Date of Application, 21st May, 1889
Complete Specification Left, 19th Feb., 1890-Accepted, 19th Apr., 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Cleaning and Polishing Malt or
Grain.
I, RUDOLF ANTON BAUMGARTNER, of Rosenheim, in the Kingdom of Bavaria,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved machine serving principally for removing the
husks and sprouts or radicles froin malt and has for its purpose to protect the grain
from injury, the cleaning being effected by mutual friction of the grain while the
removed parts and dust are instantly expelled by means of a constant suction-air-
current.
The improved machine essentially consists of a suction ventilator of known con-
struction, a separator with air regulation a chamber for removing the sprouts and husks
and a cleaning chamber, these parts occupying the horizontally arranged machine from
top to bottom in the order named. All movable parts of the machine may be actuated
by a vertical shaft.
The suction ventilator serves to expel the waste matter during the work into the
dust chamber. The separator consists of two telescopically arranged cylinders, the
upper of which is adapted to be raised and lowered for so regulating the air current
between the perforated mantle surrounding the three chambers and the outer dust-
mantle as to cause the sprouts or other waste matter to be separated and expelled.
For the same purpose the bottom of the separator is provided with a slide for
increasing or decreasing the size of its perforations.
The malt to be treated enters through an adjustable inlet into the upper chamber
in which rotates a fan-system provided towards the centre with a mantle of perforated
sheet metal. The fans or beaters are adjustable to various positions and open-worked.
The next chamber has the same construction except that the perforations of the sheet
metal are finer. All three chambers communicate through suitable openings having
the size of the inlet.
The inner mantle of the cleaning or polishing chamber is also made of finely
perforated sheet metal and contains a drum consisting of segments of china, the
interstices between which are closed with perforated sheet metal. This drum has
besides wings provided alternately at the top and bottom of the segments.
The machine works as follows:
The inlet so regulates the admission of the material to the upper chamber, as to fill
the interstice between the drum and the perforated mantle. The great rapidity of the
rotating drum and the open-worked fans cause the grain to be mutually pressed and
rubbed without being injured; the coarser sprouts or waste matter are expelled
through the perforations of the outer mantle and either driven up by the air current
regulated by the two cylinders, or fall down, while the smaller particles are expelled
through the inner perforated covering by means of the suction current. The process
in the next chamber is analogous to the above, while in the bottom chamber the malt
is delivered of any remaining dust or other waste particles.
The number of the storeys of the improved machine may of course be increased to
employ the above system for cleaning grain.
DL:01ML 1000
HUELSER & Co.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Cleaning and Polishing Malt or
Grain.
I, RUDOLF ANTON BAUMGARTNER of Rosenheim in the Kingdom of Bavaria
Empire of Germany, Manufacturer 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 :-
-
The object of this invention is an apparatus for cleaning and polishing malt or
grain in which the cleaning is effected by mutual friction of the grain and the waste
matter removed by means of a current of air.
The machines hitherto used to accomplish the above purpose operate partly with
rough partly with smooth working parts and produce a beating or even a tearing effect
on the material, thereby effecting indeed a more or less satisfactory cleansing but also
a breaking of or injury to the malt or grain.
These drawbacks are intended to be obviated in the improved machine by
systematically removing the husks and sprouts or radicles and immediately expelling
the same by means of a continuous suction air current.
Reference being had to the accompanying drawings Sheet I and II
Fig. 1 is a vertical section,
Fig. 2 is an elevation, and
Figs. 3 to 11 represent details of the improved apparatus, while
Fig. 12 illustrates in vertical section a modification thereof, intended more
particularly for treating grain.
The improved machine is built upright and consists of the following principal parts.
A suction ventilator B, a separator C with air regulation, a compartment D in which
the material is freed from sprouts, a compartment E for removing sprouts and husks
from the material and a polishing chauber F. All movable parts of the apparatus
may be operated from a vertical shaft A.
The machine is mounted by means of hollow posts on a base plate G. Each of
these posts consists of single smaller posts which at every joint carry the diaphragms
between the different chambers and are connected to the top part by aid of a common
screw bolt.
The suction ventilator B, which is of known construction, serves to pass, during
the work, the sprouts, husks and dust particles immediately into the dust chamber.
The so-called separator C provided below the ventilator consists of two cylinders
telescopically displaceable in each other, the upper of which is adapted to be raised
and lowered by means of lever c². This arrangement serves to allow the outer
current of air between the perforated steel mantle a and the outer dust mantle to be
so regulated as to cause radicles or other waste matter to be expelled separately.
In addition to this regulating device a slide c³ is provided on the bottom of the
separator, by means of which the apertures leading to the lower compartments can be
adjusted in size, thereby allowing the expulsion of dust or other matter to be
accurately regulated.
In this manner more coarse waste material i.e. sprouts and husks can be separated
from the fine waste matter and dust particles, by the above described regulation of the
current of air.
The malt to be freed from radicles and cleaned passes through the adjustable inlet b
into the first cleaning drum or chamber, the mantle a of which is formed of sheet
metal having perforations of about 14 millimetres in width. This chamber contains a
rotary fan system D₁ which is provided towards the centre with a mantle D² of
perforated sheet metal. The fans or beaters D³ have apertures and occupy inter-
mittently different positions, as shown in Fig. 4. The second chamber for freeing
the material from sprouts and husks, is of the same construction except that
the perforations of its inner mantle are somewhat finer and the two chambers
communicate with each other through apertures i which occupy different positions
relatively to each other and are equal in size to the upper or inlet aperture i¹.

page_text: Such apertures connect likewise the second chamber with the so-called polishing
chamber F, the inner mantle of which is also made from sheet steel having very fine
perforations. In this chamber rotates the polishing drum, which consists, as shown
in Fig. 5, of single segments of china or other suitable material with interstices
which are closed with finely perforated sheet steel. The drum has moreover
connected therewith fans or wings m which, as shown by Figs. 8, 9 and 12, do not
occupy the entire height of the drum and are arranged alternately at the top and
bottom thereof. These fans may also be provided with cuts.
The improved machine operates as follows:-
The inlet so regulates the supply of material to the first compartment for removing
the radicles or sprouts as to cause the interstice between the drum and mantle a to be
entirely filled up. Owing to the great speed of revolution of the drum (about
600 revolutions per minute) and the open friction and driving wings D³ the grains
are pressed and rubbed without injury along each other and against the mantle. The
coarser sprouts and waste substance are expelled through the perforations of the
outer mantle and either fall down or are driven up by the current of air regulated by
the adjustable cylinders c. The finer waste particles are expelled through the inner
covering by the suction current. The operation in the second compartment, into
which the material freed from sprouts descends through the apertures i, is the same as
in the first chamber. The husks, dust particles etc. removed from the material are
likewise eliminated by the suction current. Any residue of impurity adhering to the
grains is eliminated through the polishing chamber F. The china segments rub off
the husks and fibres, these finer waste matters being removed by suction through the
interstices 7, covered with finely perforated sheet metal, as well as through the outer
mantle, allowing the malt to leave the machine through the outlet c in a perfectly
cleaned and polished condition.
The number of storeys or chambers may of course be increased in a corresponding
manner, as shown in Fig. 12, to render the apparatus suitable for cleaning grain.
The speed of the ventilators may be made to differ from that of the single drums.
Also the husks may be expelled according to their gravity by providing, for
instance, outlets n, n' etc.
Having now particularly described and ascertained the nature of
my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
°
An apparatus for cleaning or polishing malt or grain, in which the material is first
worked by horizontally rotating perforated drums D₁ provided with open fans or
wings Ds, then, by means of a polishing drum, consisting of china segments k with
intervening perforated sheet steel pieces and wings m provided alternately above
and below, in single superposed cylinders a separated from each other by diaphragms
and covered with correspondingly perforated metal sheets, while a current of air
adjustable by means of displaceable tubes c provided in the so-called separator C
passes through the drums of the different storeys outside between the cylinder
mantle a and mantle h and also inside the sides of the drums thereby expelling the
light and heavy waste matter separately, substantially as and for the purpose set
forth.
Dated this 10th day of Fehruoru 1800
RUDOLF A. BAUMGARTNER.
Per Huelser & Co.,
142, Fleet Street, London, Attorneys.