IMPROVEMENTS IN APPARATUS FOR RAISING BEER BY THE GENERATION OF CARBONIC ACID GAS
Year: 1884

page_text: I EDWIN AMBROSE BRYDGES a Member of the "International Association for
Patent Matters" of 26 Boulevard de Strassbourg in the City of Paris and French
Republic do hereby declare the nature of my Invention for "IMPROVEMENTS IN
APPARATUS FOR RAISING BEER BY THE GENERATION OF CARBONIC ACID GAS"
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 improvements in apparatus for raising beer by the
generation of carbonic acid gas.
The object of this said apparatus is to substitute carbonic acid gas (C.O,) for air
in beer pumps or pressure apparatus for raising beer from the cask to the cock or
tap-The carbonic acid itself is produced by the action of 1220 grammes of
sulphuric acid (H, SO,) diluted with 5 litres of water on 1220 grammes of
bicarbonate of soda (Na H CO,) as the formation of carbonic acid (CO₂) commences
as soon as these ingredients are brought in contact with each other but ceases as
soon as the same are placed out of contact.
The apparatus is for this purpose so constructed that the separation of the
sulphuric acid (H, SO.) and the bicarbonate of soda (natrium bicarbonicum
Na H CO,) is automatically effected as soon as the pressure is increased by closing
the tap or cock in which case the sulphuric acid (H, SO.) passes off into a separate
receptacle containing air and compresses the said air-As soon however as the
pressure in the apparatus decreases the compressed air forces the sulphuric acid
(H, SO) to the salt (Na H CO₂) whereupon the gas production recommences.
The gas producing apparatus is in connection with a scrubber or gas washing
apparatus, a safety valve and a manometer.
Figure 1 is an elevation, and
Figure 2 a vertical section of my said improved apparatus which said apparatus
consists of a cylindrical vessel A of cast iron or other suitable material the inner
walls of which said vessel are enamelled or otherwise protected so as to be able to
withstand the action of the sulphuric acid (H, SO) which said apparatus is
supported by suitable feet or standards.
The bottom of the vessel A is provided with an appropriate opening to enable
the said vessel to be emptied and the opening closed by means of a suitable cork,
stopper or other closure.
A porcelain cylinder B is suspended in the vessel A in such manner that an
annular space is formed between the same and the enamelled inner surface of the
vessel A which said annular space serves as gas reservoir.

page_text: The porcelain cylinder B reaches to within about 4 centimetres (18") of the
bottom of the vessel or receptacle A.
The flange of a second cylinder C of copper with tinned inner walls is attached
to the upper part of the vessel A and an india rubber or other suitable packing
arranged between the said Banges.
The lower part of the cylinder C is open towards the vessel A, the flanges of
the vessels AC are covered with a suitable lid or cover and cover and flanges
firmly connected by means of suitable screws or screw bolts.
The cylinder O is closed by a suitable lid above which an
arranged that the lid to the cylinder C can be firmly pressed
suitable screws.
iron bail or bow is
down by means of
A rod, the lower part of which is provided with suitable screw threads, runs
through a stuffing box in the centre of the lid and carries a conically formed
porcelain receptacle D which said receptacle is provided with a perforated sievelike
bottom and is suspended in the porcelain cylinder B-The receptacle D serves to
receive the bicarbonate of soda and is moved up and down by means of the screw
on the end of the said rod.
The above described parts form in their combination the gas generator.
The recipient consists of a bronze globe, consisting of two half globes which are
connected by means of suitable screws, and carries at its lower part a tube with a
suitable valve through which the gas from the washing apparatus or scrubber
enters, and is further provided with two borings through which the tubes E and F
pass, which said borings are well packed.
At the
The tube E conducts the purified gas by means of the cock R to. the cask
whereas the tube F leads to a manometer for indicating the pressure.
upper part of the globe or recipient is a suitable süfety valve.
The gas from the generator passes, on its way to the scrubber or washing
apparatus, a tube in which two canals are bored one of which leads gas into the
washing apparatus, the other out of the same into the globular recipient.
The recipient is further provided with a small cleansing cock for the almost
impossible eventuality that an excessive fermentation should drive some drops
of beer into the recipient, which can in such case be lot off by means of the
said cock.
The vessel 1 serves to catch the water from the vessel 2, in case the said vessel
should be emptied, so that the water is provented from penetrating into the guns
generator.
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:
1. The application and arrangement of the above described novel apparatus
for producing carbonic acid (CO2) in combination with the washing apparatus,
the globular recipient and the novel method of conducting the gas from the
apparatus to the beer cask substantially as described and shown in the accompanying
Drawings.
2. The general construction arrangement and employment of the parts of the
apparatus for raising beer by means of carbonic acid gas (CO₂) substantially as
described in the foregoing Specification.
Dated this 15 day of April 1884.
Witnesses:
ANTHONY STEFFEN.
WILHELM VOGT.
EDWIN A. BRYDGES.