IMPROVED APPARATUS FOR GENERATING CARBONIC-ACID GAS, MIXING IT WITH WATER OR OTHER LIQUIDS, AND REFRIGERATING SUCH LIQUIDS
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Thomas Hogben at the Office of
the Commissioners of Patents on the 24th August 1881.
THOMAS HOGBEN, of City Road, in the City of London, Engineer and
Manufacturer. "
IMPROVED APPARATUS FOR GENERATING CARBONIC-ACID GAS,
MIXING IT WITH WATER OR OTHER LIQUIDS, AND REFRIGERATING SUCH LIQUIDS."
My Invention relates to the improved construction of apparatus for generating
carbonic-acid gas, mixing it with water or other liquids, and refrigerating such
liquids; and the object of my Invention is the economical and ready production
of aerated beverages for draft purposes.
The apparatus consists chiefly of two vessels, an upper and a lower vessel, made
of copper, glass, or other suitable material. These vessels are screwed to each
other or otherwise connected so as to allow of the easy removal of the upper
vessel.
The mouth of the upper vessel, which enters the lower vessel, is closed, and a
small syphon pipe attached to the base of the upper vessel forms the only
communication between the two vessels.
To the upper portion of the upper vessel a pipe is attached which connects the
said vessel with a barrel or other vessel containing the liquid to be treated, and
passes to the lower portion of such barrel or other vessel. I sometimes attach a
water gauge to the said barrel or other vessel. In the upper portions of either or
each of the vessels I place a safety valve controlled by a spring or other suitable
means, and which will allow of the discharge of the gas or liquid in the event of
its pressure being unduly increased by reason of some stoppage or other accident.
In the lower vessel I sometimes place an agitator or mixer, the spindle of which
passes through the side of the vessel and has a handle or knob attached to its
extremity, the turning of which will cause the contents of the vessel to be stirred
or agitated. When the apparatus is required to be used I fill the upper vessel
about three quarters full of water, and I place in the lower vessel a cartouche of
bi-carbonate of soda, marble dust, lime, or other suitable chemical agent. The
paper shell of the cartouche is useful in delaying the generating of the gas while
the vessels are being connected after being charged as described.
The vessels being duly charged, carbonic-acid gas is quickly generated in the
|lower vessel, and, passing into the syphon pipe, is liberated at the bottom of the

page_text: upper vessel, and passes through the water in the said vessel into the pipe through
which it discharges itself at the bottom of the barrel or other vessel containing
the water or other liquid to be treated, as well as through perforations in the
immersed length of the said pipe, and passing up towards the surface, saturates
the water or other liquid, causing it to be aerated.
The liquid thus treated or aerated is then drawn off as required from the
barrel or other vessel containing it by a tap or other convenient means; and I
prefer to cause the aerated liquid to pass into a refrigerator, or channel, or pipes
contained in a box charged with ice, salt, and sawdust or other suitable
refrigerating agents, before being poured into glasses or other receptacles out of
which it is consumed.
I attach the apparatus to the barrel or vessel containing the liquid to be treated
by cramps, clips, straps, or other suitable means.