GENERATING CARBONIC ACID GAS AUTOMATICALLY
Year: 1885

page_text: "
I FREDERICK FOSTER of 26 Eagle Wharf Road Hoxton in the County of
Middlesex Engineer do hereby declare the nature of my invention for GENERATING
CARBONIC ACID GAS AUTOMATICALLY" to be as follows:-
This invention relates to means of supplying a gas generator with acid at
intervals automatically for supplying gas to a gasometer to replace the quantity
withdrawn during the manufacture of aërated liquids.
It consists in means for charging the generator with a certain quantity of the
whiting or other carbonate employed and of supplying acid automatically as
required to keep the gasometer supplied as the gas is withdrawn from the gasometer
for use.
The supply of acid is taken from a vessel in which the quantity stored is
estimated to evolve from the quantity of carbonate with which the generator is
charged, all the available carbonic acid gas.
For this purpose I construct of earthenware a gland cock, the gland of which
inay be of lead either cast on the earthenware or screwed on; the earthenware
tap being made with a screw thread for this purpose.
The packing I use by preference is of india rubber or of felt saturated with
stearine. The gland cock acts as a stop cock for the purpose of allowing acid to
pass (from the vessel in which the required quantity is stored) to the generator as
required, being operated by means of a handle which is acted upon by two stops
fixed upon the cord which carries the weight that acts as a counterbalance for the
gasholder.
An electric bell is provided which by means of a contact piece carried on the
said cord, causes the bell to ring when by reason of the gas making materials
being exhausted, the production of gas ceases and the store in the gasometer
begins to be exhausted.
During this time the generator is supplied with a fresh charge of carbonate and
the measured store of acid is replenished so that the formation of the gas proceeds
before the gasometer has become entirely exhausted.
By this means the manufacture of the aërated liquid continues without inter-
ruption, a great economy of gas making materials is effected and a smaller gasholder
suffices for keeping up a supply of gas than would be the case if the gasometer

page_text: were supplied with gas in the ordinary way by making supplies of gas at long
intervals of time.
In the accompanying drawings A is a bin from which a supply of whiting or
other carbonate is taken to supply the generator B from above. C is the water
supply by which water is admitted to the generator B for the purpose of mixing
with the carbonate by means of an internal fan worked by a band communicating
with the pullies D. E is a carboy of acid carried on a stage fitted with a syphon F
which serves for supplying a store-vessel G which is fitted with a glass gauge for
the purpose of noting the required quantity for exhausting the quantity of
carbonate put into the generator B.
From the store vessel G extends a pipe H fitted with the gland cock I controlled
by its balanced handle J. and the stops K. L which can be fixed at any convenient
point on the cord by means of set screws.
N is the metallic piece on the cord which makes contact for the purpose of
ringing the electric bell when the gasholder falls below a certain point.
The gas passes from the generator B by the pipe O to the purifyer P and from
the purifyer P by the pipe Q to the gasometer R whence it is withdrawn through
a pipe leading to the pump of the aërating machine.

page_text: I FREDERICK FOSTER of 26 Eagle Wharf Road Hoxton in the County of
Middlesex Engineer 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 :-
This invention relates to means of supplying a gas generator with acid at
intervals automatically for supplying gas to a gasometer to replace the quantity
withdrawn during the manufacture of aërated waters or other aërated liquids. It
consists of means for charging the generator with a certain quantity of the whiting
or other carbonate employed and of supplying acid automatically as required to
keep the gasometer supplied as the gas is withdrawn from the gasometer for use.
The supply of acid is taken from a vessel in which the quantity stored is
estimated to evolve from the quantity of carbonate with which the generator is
charged all the available carbonic acid gas.
For this purpose I construct of earthenware a gland cock, the gland of which
may be of lead either cast on the earthenware or screwed on; the earthenware tap
being made with a screw thread for this purpose.
The packing I use by preference is of india rubber or of felt saturated with
stearine. The gland cock acts as a stop cock for the purpose of allowing acid to
pass (from the vessel in which the required quantity is stored) to the generator as
required, being operated by means of a handle which is acted upon by two stops
fixed upon the cord which carries the weight that acts as a counter balance for the
gas holder.
An electric bell is provided which by means of a contact piece carried on the
said cord causes the bell to ring when by reason of the gas making materials
being exhausted, the production of gas ceases and the store in the gasometer begins
to be exhausted.
By this means the manufacture of the aërated liquid continues without inter-
ruption, a great economy of gas making materials is effected and a smaller. gas
holder suffices for keeping up a supply of gas than would be the case if the
gasometer were supplied with gas in the ordinary way by making supplies of gas
at long intervals of time.
In the accompanying drawings B is a bin from which a supply of whiting or
other carbonate is taken to supply the generator F. D is the water supply from
which water is admitted to the generator F by means of the cock W for the
purpose of mixing with the carbonate by means of an internal fan worked by a
band communicating with the pullies Q R is a carboy of acid carried on a stage
fitted with a syphon A which serves for supplying a store vessel H which is fitted
with a glass gauge for the purpose of noting the required quantity for exhausting
the quantity of carbonate put into the generator F.
From the store vessel H extends a pipe fitted with gland cock I controlled by
its balanced handle S and the stops J. J which can be fixed at any convenient
point on the cord by means of set screws. L is the metallic piece on the cord
which makes contact for the purpose of ringing the electric bell N when the gas

page_text: holder falls below a certain point. The gas passes from the generator F by the
pipe T to the purifyer K. and from the purifyer K by the pipe U to the gasometer P
whence it is withdrawn through a pipe Ỷ leading to the pump of the aërating
machine.
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 acid tap I operated by the stops J. J on the balance cord of the
gasholder substantially as described.
2° The general arrangement of apparatus for generating carbonic acid gas
automatically substantially as described.