AN AUTODYNAMIC CARBONIC ACID GAS APPARATUS FOR RAISING LIQUIDS AND FOR THE PRESERVATION OF BEER
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by William Edward Gedge at the
Office of the Commissioners of Patents, with his Petition, on the 4th
May 1869.-A communication from abroad by François Foussat,
junior, of 37, Boulevard Bonne-Nouvelle, Paris, France, Brazier
and Plumber.
I, WILLIAM EDWARD GEDGE, of the Firm of John Gedge and Son,
of No. 11, Wellington Street, Strand, in the County of Middlesex,
Patent Agent, do hereby declare the nature of the said Invention for
"AN AUTODYNAMIC CARBONIC ACID GAS APPARATUS FOR RAISING LIQUIDS AND
FOR THE PRESERVATION OF BEER," a communication to me from abroad by
François Foussat, junior, of 37, Boulevard Bonne-Nouvelle, Paris,
France, Brazier and Plumber, to be as follows:-
This apparatus works under the pressure of carbonic acid gas, the
pressure varying according to circumstances, and is composed,-
1°. Of a vase termed the "acido" surmounted by a stopper for the
introduction of the liquid. At the upper part of this vase is a tube which
places it in communication with a generator, and an equilibrium of

page_text: pressure is maintained by means of india-rubber tubing fitted at the
lower part and through which the acid flows into the generator.
2º. Of a vase termed the "generator" containing carbonate of lime.
At the lower part of this vase is a cock termed the purging or blow-off
cock. This generating vase is surmounted by a valve with flexible
membrane, the movement of which permits a lever of a weight regulated
for a given pressure to determine with precision the introduction of the
acid by the tube coming from the "acido vase into the generator by
means of a throttle pressure exercised by the weighted lever on the tube
coming from the "acido" vase in order to constantly maintain the
proper pressure for working the apparatus. On this same generator
"
is a second valve termed the safety valve, which permits the gas to
escape in case of an increase of pressure.
3°. Of a vase termed the "washer" containing water for purifying
the gas formed in the generator and led into the washer through a
plunge pipe. This washer is surmounted by a stopper, and its lower part
is provided with a purging cock.
4°. Of a vase termed the "accumulator" having at its lower part a
delivery cock, at its upper part a stopper, and in connection with the
washer by a tube. On this vase is fixed the gas distributing pipe, which
carries a pressure guage, and has affixed to it two other pipes joining on
to the vessels from which liquid is to be raised, through pipes termed
compression tubes, up to the counter or delivery tap by which it is to
be drawn for sale or otherwise.
This apparatus is termed autodynamic because its working is regulated
by means of a valve set on the generator, this valve working when the
quantity of acid introduced by the india-rubber tube becomes sufficient
for the required pressure, this valve then lifting the weighted lever and
thereby bringing a crushing or squeezing pressure upon the tube by
which the acid enters the generator. On the other hand when the
pressure in the generator decreases the lever lowers and the crushing or
squeezing of the pipe is proportionately lessened.