Improvements in and connected with Means for Charging Liquids with Carbonic Acid Gas.
Year: 1893

page_text: Date of Application, 15th Feb., 1893-Accepted, 15th Apr., 1893
COMPLETE SPECIFICATION.
Improvements in and connected with Means for Charging Liquids
with Carbonic Acid Gas.
I, ALBERT LANDERER, of 7, Central-strasse, Leipzig, in the Kingdom of
Saxony and German Empire, Professor, 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 :-
It is well known that water or beverages such as ale, wine, and the like, become
stale or insipid and are disagreeable to the taste upon being allowed to stand for a
time in open vessels, such change in their condition being due to the liberation of
the carbonic acid gas dissolved therein, whereby the salts previously held in
solution, especially calcium carbonate, are precipitated. Water which has been
boiled (a practice resorted to in times of epidemic diseases) has a similarly stale or
insipid character, owing to the carbonic acid gas having been expelled during the
process of boiling.
In order that water and the other beverages above indicated may be kept sapid
or palatable for a considerable time, or in the case of boiled water to impart to it
a more agreeable flavour, it is necessary to replace in such liquids the carbonic
acid gas which has escaped therefrom with fresh carbonic acid gas, and it is to the
attainment of this object that my invention is directed.
According to my invention, materials such as hereinafter specified, which are
capable of generating carbonic acid gas when in the presence of water or of an acid,
are formed into suitably shaped tablets or pellets, which are cast into the liquid
required to be re-charged with carbonic acid gas. Such tablets or pellets upon
dissolving generate or emit carbonic acid gas in fine or comminuted quantities which
is readily absorbed by the liquid under treatment.
In order that the generation of carbonic acid gas by the materials commonly
employed for this purpose (and such as hereinafter specified) may not be too
momentary and violent but may be gradually and slowly effected, such materials in
their formation into tablets or pellets are subjected to great pressure, whereby,
owing to the cohesion of their particles, their solubility in liquid is considerably
reduced. Or, the carbonic acid gas producing materials of the pellets may be
protected from the action of the liquid into which they are cast by a covering or
coating of a material more difficult to dissolve, so that it is only after the dissolving
of the outer covering that the inner materials are reached by the liquid. Or, the
carbonic acid gas producing materials may be intimately mixed with the indifferent,
retarding, or slowly dissolving materials, and the whole subjected to pressure to
form tablets or pellets. As indifferent or retarding agents, the salts found in
solution in natural mineral waters may be used with advantage, as a medicinal
character is thereby imparted to the liquid or beverage.
In one mode of carrying out my invention, I take from 3-4 to 3.5 grammes of
bicarbonate of soda; to 2.25 grammes of calcium carbonate; and 2 to 2.5 grammes
of carbonate of magnesia. These ingredients are finely powdered and closely
compounded in a mortar, and are then subjected to a heavy pressure under a
hydraulic press.
When the tablets or pellets composed of the ingredients above specified are cast
into water impregnated with 8 parts of anhydrous sulphuric acid, or 6 parts of
sulphuric acid and 2 parts of hydrochloric acid, the beverage produced approxi-
mately corresponds in composition to the "Biliner" acidulous water.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The method of manufacturing tablets or pellets for restoring the carbonic
acid gas to beverages which have become stale or insipid, consisting of subjecting
the materials for generating the carbonic acid gas, (either separately or combined
with indifferent materials or materials not readily soluble), to pressure, whereby
the tablet or pellet so formed is prevented from becoming quickly dissolved, and
the generation of carbonic acid gas is rendered more gradual and prolonged; sub-
stantially as herein described.
2. The use in the manufacture of tablets or pellets for restoring the carbonic acid
gas to beverages which have become stale or insipid, of the dry residual compounds
of salts of natural mineral waters; in the manner and for the purposes herein set
forth.
Dated this t
1000
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Patent Agents.