Apparatus for Sterilising Beer, Wine, and other Liquids under Pressure.
Year: 1893

page_text: Date of Application, 4th Aug., 1893-Accepted, 23rd Sept., 1893
COMPLETE SPECIFICATION.
Apparatus for Sterilising Beer, Wine, and other Liquids under
Pressure.
I, JOHANN BAPTIST TRÖNDLE, of No. 1, Schwemme Strasse, Halle-on-the-
Saale, in the German Empire, Brewer, 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, reference being had to
the accompanying drawings and to the letters and figures marked thereon, that is
to say :-
This invention relates to apparatus for sterilising beer, wine, and other liquids,
under pressure, and which apparatus, while simple in construction, enables
beverages to be thoroughly sterilised. Beverages treated by means of this
apparatus acquire a pure taste and remain fit for use a long time, the addition
of chemicals being unnecessary.
My improved sterilising apparatus consists essentially of a pressure chamber or
vessel a, adapted to be heated, and provided with a safety valve b, thermometer c,
and pressure gauge d. This chamber fitted with two stop cocks, one of which, e,
is fixed at the bottom and may be connected by a flexible tube with a beer
reservoir, for instance, while the other, f, is fixed to the top of the chamber, and is
in communication with an air reservoir. Sterilisation by means of this apparatus
is effected as follows:-
The cock e is opened so as to put the chamber a into communication with the
reservoir containing the beer to be sterilised. The cock, communicating with the
air reservoir, is then opened, so to admit air, under pressure, into the vessel a, until
the pressure-gauge indicates that the required degree of pressure has been attained.
The flexible tube is then removed from the air cock f. Beer is then admitted into
the apparatus through the cock e, the pressure being maintained in the apparatus,
and the air cock f being opened from time to time (while observing the readings
of the pressure-gauge) so that the volume of air escaping is equal to that of the
beer entering. On the chamber or vessel being completely filled, the heating of
the liquid may take place. When the pressure in the apparatus exceeds a certain
limit, the valve either lifts, or may be opened by hand, for the required length
of time. For cooling, the valve is again closed. The beer is thus sterilized
under pressure, while retaining all the alcohol and carbonic acid in the original
proportions. When the beer is sufficiently cooled, it is run into casks, the joints of
which should be previously caulked with pitch, and said casks are then placed in
the celler in the usual way.
The sterilised yeast or barm settles within a period of from a fortnight to three
weeks, and the beer may be drawn off either into sterilised bottles, or into other
casks or kegs coated with pitch.
This
Wine, after primary fermentation, may be sterilized in the same manner.
process renders the addition of plaster or salicyl for the purpose of keeping the
wine in a good condition, unnecessary; nor is it necessary to "fine" the wine by
means of isinglass or the like.
The liquid to be sterilised is best heated in a water bath.
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 :-
An apparatus for sterilising liquids under pressure, consisting essentially of a
chamber or vessel provided with a pressure gauge, thermometer, and valve, and
furnished with two cooke one of which

page_text: the other with a reservoir containing beer, or other liquid, so that the said chamber
or vessel may be filled with compressed air prior to the entry under pressure of
the liquid to be sterilised, and which liquid can then be heated while under
pressure, substantially as hereinbefore described and shown with reference to the
accompanying drawings.
11
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicant.