Apparatus for Brewery rurposеs
Year: 1899

page_text: Date of Application, 8th Mar., 1899-Accepted, 20th May, 1899
Apparatus for Brewery rurposеs,
I, JOSEF SCHAEFER, Engineer, 104, Westwall, Crefeld, Germany, do hereby declare
the nature of my said invention and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement;
In practice special steaming apparatus is used for steam-mashing for brewery,
purposes, which, as a rule, consists of a system of tubes through which the steam
is conducted and in more modern plant, these tubes are continuously rotated in the
mash-tun.
The chief disadvantage displayed by the known steam-pipe systems is that the
mash adheres to the rotating pipes when it is being warmed up, a defect occasioned
by the insufficient movement of the mash with regard to itself and the heating
surface.
As a rule it is impossible to apply scrapers to the walls of the mash-tun as they
impede the rotation of the steam-pipe system. The pipes consist of bent U-shaped
pieces which are fastened at intervals to collars on a solid axle passing centrally
through the apparatus which collars also serve to conduct the steam. This con-
trivance, however, has the disadvantage that the steam cannot pass unimpeded
through the whole pipe system but must at intervals return to the collar on the
axle, which, to some extent, forms the steam chest. The natural consequence of
this is that the temperature is not the same in the last pipe as in the first owing
to the repeated interruptions to the passage of the steam. A uniform working
of the mash is therefore impossible. A further and greater disadvantage is that
in steaming the mash in such an apparatus it frequently lies unstirred against
the smooth wall of the steam chest in consequence of the slight amount of friction,
whereby the possibility is introduced of the mash easily burning owing to the heat
generated in this place, and a uniform mashing cannot take place because there is
much greater generation of heat in this place than at the periphery.
The object of the present invention is to obviate these two great disadvantages
as much as possible and is attained by passing the steam through a steam chest
with double walls filled with insulating material and a similarly constructed
steam pipe into the rotating pipes which are arranged in such a serpentine manner
as to form separate parallel planes. At the same time an unbroken circulation of
the steam through all the convolutions of the pipe system from top to bottom is
ensured. The steam pipe system can be made to rotate conveniently in such
an apparatus between the several scrapers.
The improvement is illustrated in the accompanying drawing.
Figure is a steam mashing apparatus provided with this improvement, in
sectional elevation.
Figure 2 is the same in ground plan.
17.
The steam pipe through which the steam enters, is surrounded by a second
pipe which expands below into a dome shaped covering for the
steam chest b¹. The latter is also provided with a double wall 12
so that between this and the inner wall an insulating space f results. This
insulating space, as also that round the steam pipe a is filled with some material

page_text: calculated to impede heat radiation in order that the heat may be diminished on
the smooth side of the steam chest. By this means the mash, which, as was
pointed out in the introduction, receives little or no stirring movement in this place,
is prevented from burning and uniform mashing is ensured. The circulating
steam passes out again from the steam chest into the rotating pipes which are
arranged in a serpentine manner so that the first coil goes outwards from the
apparatus, turns itself into the coil and back again inwards. The coil is led
downwards and goes outwards again in the second plane as the pipe . In the same
plane it turns inwards again, is again led downwards and again outwards as the
coil and backwards as the last coil c. The inward and outward circulation
openings thus lie above each other. In this way the pipe-planes when rotated move
between the scrapers g, prevent burning and produce and intimate mixing thus
ensuring a uniform mashing.
To make things clearer it must be pointed out that the whole apparatus is set
in motion by the band pulley h. The revolution of the pulley axle sets the gear-
ing in motion and this moves the axle m which latter is in connection with the
steam chest apparatus b'.
The axle
and the pipe n.
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:-
is of course, made hollow so that the steam may pass off through it
CLAIM.
The improvement in steam-mashing apparatus for brewery purposes, charac-
terised by the steam from a steam chest, which is prevented from radiating heat
by a double wall into which insulating material is introduced, and from a
similarly constructed steam pipe passing into rotating pipes which are coiled in
serpentine fashion-so-as--to-produce separate-parallel-planes which can rotate
between scrapers scrapers and ensure an uninterrupted circulation of the steam
through all the convolutions of the system from top to bottom.
Dated this 7th day of March 1809
JOSEF SCHAEFER.
By George Barker,
Fellow of The Chartered Institute of Patent Agents,
Agent for Applicant.
77, Colmore Row, Birmingham,