Improvements in Effervescent Cartridges for Aerating Liquids.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Effervescent Cartridges for Aerating Liquids.
GODFREY BAMBERG Chemist 5 Tomlin's Grove Bow Road London, E. do
hereby declare the nature of this invention to be as follows:-
My invention consists in making the cartridges solid in such manner that acid
and alkali shall be completely separated by a soluble division, and thus no
chemical action can take place from moisture, but only when the charge is surrounded
by water.
In carrying out my invention I form a suitable cake (of cylindrical or semi-
cylindrical shape by preference) containing the necessary quantity of citric, tartaric
or other suitable acid. I also form another similar cake, but containing instead of
the acid, a carbonate or bicarbonate of an alkali or alkaline earth. The two cakes
are joined together by a film or division of a soluble adhesive material which is
practically neither acid nor alkaline. The sweetening (either sugar or saccharin or
both) and flavouring materials can be added to the materials of either or both sides
(previous to forming the cakes) and when medicinal waters are required the drug
or drugs can also be added.
A very good way of forming the cakes is to moisten slightly the materials with
a concentrated tincture of the essential oil for flavouring, and the spirit in the
tincture evaporating sets the materials, or they can also be formed and in a better
and more moisture resistant method, by compression from a dry powder. The
soluble division or film can be made by preparing a paste of concentrated syrup and
icing sugar and on joining the two cakes with this, it sets hard and dry before any
chemical action can take place.
The acid and alkali being thus separated by the neutral division, no chemical
action can take place in consequence of exposure to moisture, but when the double
cake or charge is placed in water, the water acts as solvent and carrier from one
side to the other, chemical action at once takes place and carbonic acid gas is
released from combination in a copious and constant stream, and the current caused
by the rising of the gas bubbles ensures the solution of the other materials. If the
charge be placed in a bottle of water, and the stopper fixed on, the gas is forced into
the water by its own pressure effectually aërating it.
Dated this 22nd day of June 1894
Improvements in Effervescent Cartridges for Aörating Liquids.
1, GODFREY BAMBERG, Chemist, Tomlin's Grove, Bow Road, London, E.
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 :-
My invention consists in making effervescent cartridges in such a manner that
the acid parts and the alkali parts are completely separated by a soluble neutral
division, and thus no chemical action can result from exposure to moisture, but only
when the cartridge is immersed in and surrounded by water.

page_text: In carrying out my invention, I form a suitable cake, which may be of cylindrical
or semi-cylindrical shape, containing the necessary quantity of citric, tartaric or
other suitable acid.
I also form another similar cake containing a carbonate or bicarbonate of an alkali
or alkaline earth. The two cakes are joined together by a film or division of a
soluble adhesive material which is practically neither acid nor alkaline. The
sweetening materials, which may be sugar or saccharin, or both, and the flavouring
materials can be added to the substances of either or both cakes before forming
them into cakes, and, when medicinal waters are required, the drug or drugs can
also be added.
1
One way of forming the cakes is to moisten slightly the materials with a
concentrated tincture of the essential oil used for flavouring and mould them
under pressure; as the spirit of the tincture evaporates, the materials set.
prefer, however, to mould them in the form of dry powders, solidifying them by
compression.
The materials employed in forming the cakes, and their proportions may vary
considerably I find the following mixtures give good results.
For soda water, the compound for the alkaline cake, may consist of 27 lbs. soila
bicarbonate, with 3 lbs. sugar; the compound for the neid cake consisting of 23 lbs.
tartaric acid and 3 lbs. sugar.
For lemonade, the alkaline compound may consist of 27 lbs. soda bicarbonate,
15 lbs. sugar, 1b. saccharine, and 80 fluid ounces essence of lemon; the acid
compound consisting of 25 lbs. tartaric acid, 16 lbs. sugar and 60 fluid ounces essence
of lemon.
The soluble division or film uniting the cakes consists of n paste made of con-
centrated syrup and icing sugar. On joining the two cakes with this, it
cements them together and sets hard and dry before any chemical action can take
place.
When the cartridge, consisting of the acid and alkaline cakes, is immersed in
water, the cakes are dissolved and chemical action takes place, liberating carbonic
acid gas as the acid combines with the alkaline base.
The other soluble materials also become dissolved and diffused throughout the
solution. If the cartridge be placed in a bottle of water and the stopper secured,
the carbonic acid gas is forced into the water by its own pressure, effectually
aërating the contents of the bottle.
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 :-
An effervescent cartridge for aërating liquids, consisting of an acid cake cemented
to an alkaline enke by a neutral soluble film, substantially as described.
בד
ABEL & IMRAY,
Agents for the Applicant.