Improvements in Pneumatic Malting Apparatus
Year: 1899

page_text: Date of Application, 13th Jan., 1899
T
01
4000
4000
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Malting Apparatus,
I, JAMES YATE JOHNSON, of 47, Lincolns Inn Fields, in the County of London,
Gentleman, do hereby declare the nature of this invention (which has been com-
municated to me from abroad by the Syndicat fuer Pneumatische Maelzerei, of
124, Leipzigerstrasse, Berlin, in the German Empire), to be as follows:-
The object of this invention is to more perfectly mix the contents of drums,
or shells, in which pneumatic malting is performed, and at the same time to
Becure a more thorough subjection of the contents of such drums or shells to the
action of the air.
Apparatus in which pneumatic malting is performed, consists essentially in
a closed revolving drum, or shell, with a central perforated tube, and perforated
tubes at the internal periphery of the drum, or shell, and means for supplying
air to the last-named tubes, which air passes from these tubes through the
material under treatment and out through the central tube, or vice versa, means
being also provided for shutting off, as the drum, or shell, revolves, the passage
for air through, such of the said tubes at the periphery as are not covered by
the material in the drum, or shell.
According to the present invention the drum or shell is divided lengthways
in two equal compartments in each of which the material under treatment is
charged and worked under equal conditions. This division of the drum or shell
may consist of a solid plate fixed to the central tube throughout its entire length
and forming a partition wall, or it may consist of a flattened perforated casing,
dividing the drum diametrically into two equal compartments, the space between
the sides of the said casing taking the place of the aforesaid central perforated
tube.
The passage of air through those of the tubes, at the periphery of the drum,
or shell, which are above the surface of the charge, as the drum, or shell rotates,
is cut off by slides, or dampers, controlled by rails provided on the stationary
air pipe.
Dated this 13th day of January 1899
I, JAMES YATE JOHNSON, of 47, Lincolns Inn Fields, in the County of London,
35 Gentleman, do hereby declare the nature of this invention (which has been com-
Price 8d.l

page_text: municated to me from abroad by the Syndicat für Pneumatische Mälzerei, of
124, Leipzigerstrasse, Berlin, in the German Empire), 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 to more perfectly mix the contents of drums,
or shells, in which pneumatic malting is performed, and at the same time to
secure a more thorough subjection of the contents of such drums or shells to the
action of the air.
Apparatus in which pneumatic malting is performed, consists essentially of
a closed revolving drum, or shell, with a central perforated tube, and perforated
tubes at the internal periphery of the drum or shell, and means for supplying
air to the last-named tubes, which air passes from these tubes through the
material under treatment and out through the central tube, or vice versa, means
being also provided for shutting off, as the drum, or shell, revolves, the passage
for air through such of the said tubes at the periphery as are not covered by
the material in the drum or shell.
According to the present invention the drum or shell is divided lengthways
in two equal compartments in each of which the material under treatment is
charged and worked under equal conditions. This division of the drum or shell
may consist of a solid plate fixed to the central tube throughout its entire length
and forming a partition wall, or it may consist of a flattened perforated casing,
dividing the drum diametrically into two equal compartments, the space between
the sides of the said casing taking the place of the aforesaid central perforated
tube.
The passage of air through those of the tubes at the periphery of the drum
or shell, which are above the surface of the charge, as the drum or shell rotates
is cut off by slides, or dampers, controlled by rails provided on the stationary
air pipe.
Figures 1, 2 and 4 of the accompanying drawings are cross sections through
the drum, constructed according to this invention, showing the various positions
of the contents of the drum during one revolution, and Figure 3 is a longitudinal
section through the drum. Figure 6 is a transverse section of a modified form of
drum and Figures 5, 7 and 8 illustrate the means for shutting off the air passage
through such of the peripheral tubes in the drum as are at the time not covered
by the material under treatment.
The drum revolves on a horizontal axis. The air entering at E (Figure 3)
passes through the chamber N into the perforated tubes at the internal
periphery, and therefrom through the material under treatment and through the
perforation in the central tube R into the interior of the said tube and out there-
from by the outlet tube F (Figure 3). Or the air may be caused to pass in the
reverse direction, entering by the tube F and passing out by the passage E.
The drum is divided longitudinally by a non-perforated partition A B fixed
to the central tube R throughout its entire length, into two compart-
ments C and M, Figures 1, 2 and 4, in each of which the material under treat-
ment is charged. The partition may consist of a flattened perforated casing R¹
(Figure 6) extending diametrically across the drum so as to divide it into two
equal compartments, the said casing or partition taking the place of the central
perforated tube R hereinbefore described.
A are stays or struts connecting the perforated tube R (in the case of Figures 3
and 4) and the perforated hollow partition R¹ (in the case of Figure 6) to the
drum.
In consequence of the drum being thus divided into two compartments the
material in each of the compartments will during the slow revolution of the
drum have its own movement. In the position of the drum shewn in Figure 1
the grain or other material shifts in the compartment M away from the partition
wall A B towards the internal periphery of the drum and in the compartment (
the material shifts from the periphery of the drum towards the partition A B,

page_text: On the further movement of the drum in the direction of the arrow to the position
shewn in Figure 2 the grain for a time continues to move in the same direction
and then falls in the compartment C from one part of the periphery to the opposite
part thereof, whereas in the compartment M it moves from the periphery towards
the partition. By the continuous rotation of the drum the material is con-
tinuously shifted and turned, for instance its position shewn in Figure 4 in the
compartments, is reversed as against the position shewn in Figure 1.
It is apparent from the drawings that during one revolution of the drum all
parts of the central tube R or the central casing R', as the case may be, are for
a certain time not covered by the material, and that also some of the peripheral
tubes J are above the surface of the charge.
For preventing air which enters the drum by the peripheral tubes J from
passing out directly from such of the said tubes that are above the surface of the
charge through that part of the central tube that for the time is not covered by
the material, means are provided to shut off these tubes against the entry of the
air as long as they are not covered by the material.
These means may consist of slides & Figures 5, 7 and 8, arranged to shut off the
said peripheral tubes against the air chamber N. These slides are held back by
springs to establish a free communication between the said air chamber N and
the tubes J, but as soon as, by the rotation of the drum, one of the tubes passes
out of the surface of the charge the rod connected to the slide s strikes against
the curve of the guide t and is lifted by the said guide to shut off the tube until
by the further rotation of the drum the curve v of the guide allows the slide to be
drawn back by the spring f
The guide t does not partake of the movement of the drum; it is carried on the
part E of the air tube, and may, if necessary, be made adjustable and may be
composed of several ledges of various length t¹ (Figure 8) if some of the slides
are to be independently opened or closed at regular times.
The herein described mixing and malting drum with diametrical partition may
not only be employed to carry out the pneumatic malting process, but it may
also be employed for drying and mixing grain and similar material, and is
particularly useful for mixing material which at the same time is required to be
ventilated.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
1. A malting and mixing drum provided with a longitudinal partition dividing
the drum diametrically into two compartments in each of which the material
is treated under equal conditions substantially as and for the purpose herein-
before described.
2. In a malting and mixing drum divided diametrically by a longitudinal
partition into two compartments the said partition being in the form of a
perforated casing taking the place of the usual central tube, substantially as and
for the purpose hereinbefore described.
3. In a malting and mixing drum divided diametrically into two compartments
by a longitudinal partition a curved guide and slides for periodically closing and
opening such of the peripheral tubes of the drums as at the time are not covered
by the grain, or the like, substantially as and for the purpose herein before
described.
JOHNSONS &
WILLCOX,
47, Lincolns Inn Fields, London, W.C., Agents.