Improvements in Apparatus for the Preparation of Malt.
Year: 1894

page_text: Date of Application, 26th Jan., 1894--Accepted, 16th June, 1894
COMPLETE SPECIFICATION.
Improvements in Apparatus for the Preparation of Malt.
We RICHART RUDOLF PAUL SCHMIEDECKE of 43 Krummestrasse
Charlottenburg near Berlin, Germany, Mechanic, and EMIL OSKAR GADE of
13 Freskawstrasse Berlin N. Germany, Master Malter, 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 :-
This invention relates to apparatus for manufacturing malt by passing an air
current induced by mechanical means through the grain contained in a cylindrical
vessel or drum and consists in improved "arrangements of such apparatus, the
objects of our improvements being to obtain a uniform percolation of the air
through the malt by adjusting the air supply to the inclination of the malt in the
vessel while the apparatus is in operation and to render possible the supply of a
greater quantity of air to places where heating occurs and also to facilitate the
cleaning of the air distributing pipes.
On the drawing appended hereunto
Fig. 1 shows a longitudinal section through the improved malting drum,
Figs. 2 and 3 show sections along line
Fig. 1 showing the adjustment of the
air supply to different inclinations of the malt contained in the drum.
Fig. 4 shows an end view of the drum.
Fig. 5 shows the arrangement for setting the central air supply tube.
In order to obtain the adjustment of the air supply to the angle formed by the
surface of the malt contained in the drum and especially in order to render
inoperative separate rows of the radiating perforated air distributing pipes a
during the commencement of the germination in order that moist air may not
unnecessarily flow into the empty part of the drum above the grain but that all the
air supplied to the apparatus may pass through the grain, the central air tube
which remains stationary while the apparatus is at work is provided with air
outlets d only on the lower half of its circumference and made circumferentially
adjustable on the flange of the pipe f. The pipe e carrying the outlet pipes a is
fixed to the ends of the drum A and surrounds the air tube b.
When the tube b is in the position shown on Figs. 1 and 2 air is supplied through
the outlets only to those pipes a which are in a horizontal position or in the
lower part of the drum and no air passes through the distributing pipes in the
upper part of the drum. When the air tube is turned by one division of
the outlets d to the right as shown on Fig. 3 air can pass up the distributing pipes a
on the left side of the drum into the upper part thereof, while the horizontal
pipes a on the right side are shut off from the air supply. In this way the air
supply can be regulated according to the inclination of the surface of the malt in
the drum A.
For the purpose of adjusting the position of the air tube & the flange e of the
air supply pipe ƒ is formed with a dovetailed groove e¹ in which the correspondingly
shaped heads of the bolts e" serving to bolt the flange of the tube b to the flange e
can slide after the nuts are loosened and follow the turning of the tube b, the nuts
being tightened again after the tube b has been set as desired.
This arrangement possesses the great advantage of allowing the supply of air
to the different rows of tubes a to be regulated in such a manner that the angle of
inclination of the malt, which changes during the germination or growth of the
same can be taken into account so that the malt which may have risen higher
receives a sufficient air supply. Although the stoppage of single rows a is of great
Importance for conducting the operation of malting in such drums further

page_text: arrangements are required for the purpose of supplying temporarily a larger
quantity of air to some parts of the drum than to others if a thoroughly uniform
malt of equal quality is to be produced by this process.
The increased air supply to some parts of the drum is necessary if the malt
becomes heated at separate points in the drum which especially is likely to occur
in the front part of the drum and produces an uneven growth or imperfect chemical
transformation. If such heating is not promptly counteracted the malt produced
is irregular in quality and less valuable.
The occurrence of heating in separate parts of the drum is prevently by the
arrangement in the interior of the air tube 6 of a throttle valve h which is regulated
by means of a cord /'. In order to use this throttlevalve at different parts of the
drum, it is mounted in a ring i which is moveable in the tube b by means of a cord k
at the front end or cord k' at the back end so that it can be shifted backwards and
forwards as required. If heating occurs in the front part of the drum the throttle-
valve is drawn by means of the cords so as to be behind the heated part and more
or less closed whereby the pipes a in front of the same and the malt at this part
receives a larger quantity of air than the tubes behind the throttle valve until the
temperature of the malt has been rendered normal.
For the purpose of facilitating the cleaning of the pipes a they are attached to
the pipe c by means of hinges and fixed in their acting position by means of
pins m. Manholes n n and o serve to fill, empty the drum A and clean it and the
air distributing pipes a.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manuer the same is to be performed we declare that what we
claim is
1. In malting drums fitted with a central air pipe (c) with rows of radiating air
distributing pipes (a) the arrangement of an internal air tube (b) with outlets
on part of its circumference only and adjustable on the flange of the air supply
pipe () substantially as described and illustrated and for the purpose set forth."
2. In malting drums fitted with a central air pipe with rows of air distributing
pipes and an internal air supply tube in said central pipe the arrangement of a
throttlevalve moveable in said internal tube and adjustable from the outside
thereof substantially as herein before described and 'illustrated and for the purpose
set forth.
3. In malting drums fitted with a central air pipe with rows of air distributing
pipes the attachment of said air distributing pipes to said central pipe by means of
hinges and locking pins substantially as hereinbefore described and illustrated by
the drawing and for the purpose set forth.
Dated thin 22nd 2 of nuan 1001
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.