Year: 1887

page_text: I FREDERICK FOSTER of Niagara Works Eagle Wharf Koad Hoxton in the County
of Middlesex Engineer do hereby declare the nature of this invention to be as
follows:-
:―
This invention relates to generators in which carbonic acid gas is evolved from a
carbonate by the action of an acid.
The object of this invention is to make the supply of carbonic acid gas more
continuous that has hitherto been the custom, avoiding the stoppage which usually
takes place for recharging the generator with the carbonate or the acid.
For this purpose I construct the body of the generator with a division within
arranged so as to form two compartments, one above the other. Communication
between the upper and lower compartments is established by an opening controlled by
a slide valve which may be operated from without by means of a rod passing through
a stuffing box. The upper compartment is open to the atmosphere and the agitator
rod passes through the two compartments being fitted with blades or fans in both
compartments.
In the upper compartment the carbonate such as whiting is mixed with water the
agitator being operated as required or moving continuously by means of connection
with any source of motive power.
By means of the slide valve referred to any desired quantity of the carbonate mixed
with water may be allowed to pass into the lower compartment of the generator and
is there acted upon by the acid admitted as and in quantities required.
At the base of the generator I provide a discharge valve or cock which closes
automatically and may be opened periodically to withdraw the residue left from the
acid and whiting or other carbonate employed when the whole or nearly the whole of
the available gas has been dispelled therefrom.
The operation of the slide valve for admitting the mixed carbonate and water the
discharge valve or cock at the bottom and the acid supply cock may all be controlled
by the movement of a revolving shaft the rotation of which in one direction or the

page_text: other is governed by the rise and fall of the gasholder or gasometer bell and the said
revolving shaft being fitted with the required cams may be arranged so as to open the
discharge valve or cock whenever by the failure to produce gas from the contents
of the generator the gasholder or gasometer bell falls below a predetermined
point.
The discharge valve or cock then closes automatically by means of a spring or
balance weight provided for that purpose and the further descent of the gasholder or
gasometer hell operates the movement of the revolving shaft which by its cams acts
upon the acid inlet cock and the slide valve for admitting the mixed whiting and water
by which means the gasometer bell or gasholder is caused to rise again.
By this arrangement the whole operation of extracting the carbonic acid gas from
the carbonate and discharging the residue is rendered automatic and continuous
excepting so far as concerns feeding the store receptacles with whiting or other
carbonate and with acid.
·
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1007

page_text: Apparatus for Generating Carbonic Acid Gas.
1 FREDERICK FOSTER of Niagara Works Eagle Wharf Road Hoxton in the County
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 stateinent :--
This invention relates to generators in which carbonic acid gas evolved from a
carbonate by the action of an acid.
The object of this invention is to make the supply of carbonic acid gas more
continuous than has hitherto been the custom avoiding the stoppage which usually
takes place for recharging the generator with the carbonate or the acid.
For this purpose I construct the apparatus in the manner shown by the accom-
panying drawings. The generator shown in section in Fig. 2 consists of an upper
compartment A open to the atmosphere and provided with an agitator B for mixing
the whiting or other carbonate introduced at intervals as required.
The compartment A communicates with the compartment by way of a tube D
which dips in the whiting or carbonate mixture when the same passes from tho
compartment A to the compartment C and so prevents the admission of air from the
atmosphere into the body of the generator.
The compartment C is also supplied with a fan E to keep the whiting or carbonato
mixture stirring after its passage from the compartment A to the compartment C.
The compartment F is separated from the compartment C by the throttle or slide
valve G by means of which the whiting or carbonate mixture is allowed to pass from
the compartment C to the compartment F after closing the throttle or slide valves H. I.
controlling respectively the inlet to the compartment C by which the whiting or
carbonate mixture is admitted and the outlet from the compartment F by which the
spent whiting or carbonate and acid are dispelled simultaneously with the admission
of a fresh charge of materials from the compartment A to the compartment C the
simultaneous action being assured by connecting the valves H and by the rod J.
The compartment F is provided with fans K. L capable of moving in opposite
directions the shaft of the one being tubular and enclosing the shaft of the other.
Motion is communicated by means of the bevel wheels M N (shown in Fig. I) the
bevel wheel N being attached to the hollow shaft carrying the fan K and the bevel
wheel M being attached to the shaft passing through the hollow shaft and carrying
the fan L the bevel wheels M N being driven by the bevel wheel P.
In order to establish an equilibrium of gas pressure in the compartments C and F
I connect the upper part of each compartment with the other by the junction pipe Q
through which the carbonic acid gas passes by way of the purifyer R to the
gasometer S.
The acid is admitted to the generator by means of the funnel and pipe T entering
the upper part of the compartment F.

page_text: A generator made in accordance with the foregoing description may be operated by
hand opening and shutting the various valves and admitting the acid as required or
the whole of the operations may be performed automatically by movements derived
from the rise and fall of the gasometer bell S in the following manner.
The gasometer cord passing over pullies is connected with the chain and chain
wheel U and balance weight W in such a manner that by the rise and fall of the
gasometer bell S the shaft X will be rotated operating the acid tap by the bevel
gearing Y and rotating the cam wheel Z by means of the chain a passing over chain
wheels.
The cam paths in the cam wheel Z are so arranged that upon the descent of the
gasometer bell S the valve G is first operated admitting some or all of the whiting or
carbonate mixture from the compartment C to the compartment F which will cause
gas to be generated and the gasometer bell S to rise if the compartment F contains
the required acid for the purpose. If not the gasometer bell S continues to descend
and the cam wheel then operates the united valves Hand I discharging some or all of
the spent materials from the compartment F and admitting some or all of the whiting
or carbonate mixture from the compartment A to the compartment C. The further
descent of the gasometer bell S operates the acid valve band admits the acid to the
compartment F which evolves the gas necessary to raise the gasometer bell S to its
normal position from which it descends and rises operating the valve G to admit
whiting or carbonate mixture to the compartment F so long as the acid therein
contained is capable of evolving the gas required for this purpose upon the failure of
which the further descent of the gasometer bell S causes a further quantity of the
spent materials to be discharged and subsequently a fresh charge of acid to be admitted
as above referred to. .
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
1.-The construction of a generator with an open top for the production of carbonic
acid gas divided into two compartments the whiting or carbonate and water being
mixed in the upper one and the acid being admitted to evolve the gas in the lower
one substantially as described omitting that portion of the description which relates to
the arrangement of a third compartment for excluding the atmospheric air from the
body of the generator.
2. The use of the whiting tube D particularly for the exclusion of atmospheric
air from the generator.
3. The automatic operation of the whiting inlets, the acid inlet and the discharge
valve in the required order by means of the cam wheel Z rotated in one direction or
the other in accordance with the rise and fall of the gasometer bell S substantially as
described.
4. The general construction arrangement and combination of parts constituting
the improved apparatus for generating carbonic acid gas substantially as described
and illustrated by the accompanying drawings.
Dated this 23rd day of August 1888.
FREDK. FOSTER.

page_text: Date of Application, 23rd Nov., 1887
Complete Specification Left, 23rd Aug., 1888
Complete Specification Accepted, 28th Sept., 1888
I FREDERICK FOSTER of Niagara Works Eagle Wharf Road Hoxton in the County
of Middlesex Engineer do hereby declare the nature of this invention to be as
follows:-
This invention relates to generators in which carbonic acid gas is evolved from a
carbonate by the action of an acid.
The object of this invention is to make the supply of carbonic acid gas more
continuous than has hitherto been the custom, avoiding the stoppage which usually
takes place for recharging the generator with the carbonate or the acid.
Communication
For this purpose construct the body of the generator with a division within
arranged so as to form two compartments, one above the other.
between the upper and lower compartments is established by an opening controlled by
a slide valve which may be operated from without by means of a rod passing through
a stuffing box. The upper compartment is open to the atmosphere and the agitator
rod passes through the two compartments being fitted with blades or fans in both
compartments.
In the upper compartment the carbonate such as whiting is mixed with water the
agitator being operated as required or moving continuously by means of connection
with any source of motive power.
By means of the slide valve referred to any desired quantity of the carbonate mixed
with water may be allowed to pass into the lower compartment of the generator and
is there acted upon by the acid admitted as and in quantities required.
At the base of the generator I provide a discharge valve or cock which closes
automatically and may be opened periodically to withdraw the residue left from tho
acid and whiting or other carbonate employed when the whole or nearly the whole of
the available gas has been dispelled therefrom.
The operation of the slide valve for admitting the mixed carbonate and water the
discharge valve or cock at the bottom and the acid supply cock may all be controlled
by the movement of a revolving shaft the rotation of which in one direction or the

page_text: other is governed by the rise and fall of the gasholder or gasometer bell and the said
revolving shaft being fitted with the required cams may be arranged so as to open the
discharge valve or cock whenever by the failure to produce gas from the contents
of the generator the gasholder or gasometer bell falls below a predetermined
point.
The discharge valve or cock then closes automatically by means of a spring or
balance weight provided for that purpose and the further descent of the gasholder or
gasometer bell operates the movement of the revolving shaft which by its cams acts
upon the acid inlet cock and the slide valve for admitting the mixed whiting and water
by which means the gasometer bell or gasholder is caused to rise again.
By this arrangement the whole operation of extracting the carbonic acid gas from
the carbonate and discharging the residue is rendered automatic and continuous
excepting so far as concerns feeding the store receptacles with whiting or other
carbonate and with acid.
T
11
1

page_text: I FREDERICK FOSTER of Niagara Works Eagle Wharf Road Hoxton in the County
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 generators in which carbonic acid gas is evolved from a
carbonate by the action of an acid.
The object of this invention is to make the supply of carbonic acid gas more
continuous than has hitherto been the custom avoiding the stoppage which usually
takes place for recharging the generator with the carbonate or the acid.
For this purpose I construct the apparatus in the manner shown by the accom-
panying drawings. The generator shown in section in Fig. 2 consists of an upper
compartment A open to the atmosphere and provided with an agitator B for mixing
the whiting or other carbonate introduced at intervals as required.
The compartment A communicates with the compartiment C by way of a tube D
which dips in the whiting or carbonate mixture when the same passes from the
compartment A to the compartment C and so prevents the admission of air from the
atmosphere into the body of the generator.
The compartment is also supplied with a fan E to keep the whiting or carbonate
mixture stirring after its passage from the compartment A to the compartment C.
The compartment F is separated from the compartment C by the throttle or slide
valve G by means of which the whiting or carbonate mixture is allowed to
pass from
the compartment C to the compartment F after closing the throttle or slide valves H. I.
controlling respectively the inlet to the compartiment C by which the whiting or
carbonate mixture is admitted and the outlet from the compartment F by which the
spent whiting or carbonate and acid are dispelled simultaneously with the admission
of a fresh charge of materials from the compartment A to the compartiment C the
simultaneous action being assured by connecting the valves H and I by the rod J.
The compartment F is provided with fans K. L capable of moving in opposite
directions the shaft of the one being tubular and enclosing the shaft of the other.
Motion is communicated by means of the bevel wheels M N (shown in Fig. 1) the
bevel wheel N being attached to the hollow shaft carrying the fan K and the bevel
wheel M being attached to the shaft passing through the hollow shaft and carrying
the fan L the bevel wheels M N being driven by the bevel wheel P.
In order to establish an equilibrium of gas pressure in the compartments C and F
I connect the upper part of each compartment with the other by the junction pipe Q
through which the carbonic acid gas passes by way of the purifyer R to the
gasometer S.
The acid is admitted to the generator by means of the funnel and pipe T entering
the upper part of the compartment F.

page_text: A generator made in accordance with the foregoing description may be operated by
hand opening and shutting the various valves and admitting tho acid as required or
the whole of the operations may be performed automatically by movements derived
from the rise and fall of the gasometer bell S in the following manner.
The gasometer cord passing over pullies is connected with the chain and chain
wheel and balance weight W in such a manner that by the rise and fall of the
gasometer bell S the shaft X will be rotated operating the acid tap by the bevel
gearing Y and rotating the cam wheel Z by means of the chain a passing over chain
wheels.
The cam paths in the cam wheel Z are so arranged that upon the descent of the
gasometer bell S the valve G is first operated admitting some or all of the whiting or
carbonate mixture from the compartment C to the compartment F which will cause
gas to be generated and the gasometer bell S to rise if the compartment F contains
the required acid for the purpose. If not the gasometer hell S continues to descend
and the cam wheel then operates the united valves H and 1 discharging some or all of
the spent materials from the compartment F and admitting some or all of the whiting
or carbonate mixture from the compartment A to the compartment C. The further
descent of the gasometer bell $ operates the acid valve b and admits the acid to the
compartment F which evolves the gas necessary to raise the gasometer bell S to its
normal position from which it descends and rises operating the valve G to admit
whiting or carbonate mixture to the compartment F so long as the acid therein
contained is capable of evolving the gas required for this purpose upon the failure of
which the further descent of the gasometer bell S causes a further quantity of the
spent materials to be discharged and subsequently a fresh charge of acid to be admitted
as above referred to.
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
1. The construction of generators for the production of carbonic acid gas divided into
compartments to obtain the necessary mixture of whiting or carbonate and water and
its admission to the compartment in which its mixture with the required acid is
performed without admitting air into the body of the generator substantially as
described.
2. The construction of a generator with an open top for the production of carbonic
acid gas divided into two compartments the whiting or carbonate and water being
mixed in the upper one and the acid being admitted to evolve the gas in the lower
one substantially as described omitting that portion of the description which relates to
the arrangement of a third compartment for excluding the atmospheric air from the
body of the generator.
3. The use of the whiting tube D particularly for the exclusion of atmospheric
air from the generator.
4. The automatic operation of the whiting inlets, the acid inlet and the discharge
valve in the required order by means of the cam wheel Z rotated in one direction or
the other in accordance with the rise and fall of the gasoneter bell S substantially as
described.
5. The general construction arrangement and combination of parts constituting
the improved apparatus for generating carbonic acid gas substantially as described
and illustrated by the accompanying drawings.
Dated this 23rd day of August 1888..