Improvements in Carbonic-acid Pressure Apparatus for Vessels from. which Liquids are Retailed.
Year: 1894

page_text: Date of Application, 29th Jan., 1894--Acce ted, 9th June, 1894
COMPLETE SPECIFICATION.
Improvements in Carbonic-acid Pressure Apparatus for Vessels from.
which Liquids are Retailed.
I, NEWNHAM BROWNE, of 73, Cheapside, in the City of London, Chartered
Patent Agent, do hereby declare the nature of this invention and in what manner
the same is to be performed, which had been communicated to me by Paul Beck,
of Augsburg, Bavaria, in the Empire of Germany, Works Manager, to be as
follows:-
This invention relates to an apparatus readily applicable to various vessels, beer
barrels for instance, and which permits carbonic-acid gas in a gaseous form to pass
from a receiver containing such gas in a liquid form, and in quantity corresponding
to the amount of liquor drawn off, into the vessel to which such apparatus is
applied.
This apparatus which demands no manipulation of any kind in order to transmit
the carbonic acid into the vessel, is particularly suitable for domestic use, but may
also be advantageously used for the retailing of beer and aerated beverages.
The accompanying drawings show such an apparatus, in Fig. 1, in vertical section;.
Fig. 2, its application to a beer barrel.
Its construction is as follows:
A is a cast iron receiver for containing carbonic-acid, of such dimensions that
the amount of liquid carbonic acid contained therein may with certainty suffice till
the contents of the barrel or other vessel are exhausted.
b is a screw-threaded joint for connecting up said receptacle, it contains a
valve c.
v, is an outlet valve controlled by a pressure reducing valve B of known
construction. The pressure reducing valve may be adopted for a predetermined
pressure, or adjustable. d, is a channel for admitting pressure to the part B₁ of
the pressure reducing valve. d' is a channel fitted with a stop-cock H through
which the gas is admitted to the barrel or the like. R is a piece of pipe connected.
with H, its free end having a sharpened edge.
The reducing valve B shown in the drawing is constructed as follows:
The outlet valve v forms the lower end of the stem or rod of a piston n.
む
The
small space surrounding valve v is closed against the larger space above by the
membrane m fitted around the piston rod. In the large space a membrane m² is.
mounted over the top of the piston n. The surface of membrane m' exposed to.
pressure is in inverse proportion to the pressure borne by it and the face of valve v..
The space B' of the reducing valve, above the membrane m¹ communicates by the
channel d with the space round the valve v, and by the stop cock H and pipe R
with the barrel. The free end of the pipe R, may form a cutting edge.
S, is a safety valve and consists of a closed tube t having a lateral aperture o,.
and a rubber tube g, slipped over t.
Such an apparatus is applied and operated as follows:
By forcing and rotating the tube R in the bung k of the barrel C a cylindrical
piece is cut out of the bung and remains in the tube R. This securely joins.
the tube to the bung and also holds the apparatus in place. The stop cock H is
now opened (see Fig. 2).
When the tap Z being turned, beer, or other contents of the barrel, is drawn off
from the barrel, a partial vacuum is produced in the part B' of the pressure-
reducing valve B. The pressure in the receiver A is then enabled to open the
valve v and gaseous carbonic acid flows through the channels d, d' the stop cock H,
tube R and the aperture 1 (in tube R) provided for this purpose, into the barrel..

page_text: As soon
as the tap Z is turned off again, equilibrium is re-established in the
pressure reducing valve, the outlet valve v is closed and no more carbonic acid can
pass from the receiver A.
So long as the stop cock H remains closed equilibrium is maintained between
the pressure on membrane m' and that on valve v.
It will be seen that the supply of carbonic acid depends solely on the reduction
of pressure in the barrel, the latter produced by drawing off the contents by the
stop cock when the latter is turned open.
If pressure in the barrel were to become excessive, the safety valve S becomes
operative the rubber tubing g slipped over the tube t being expanded by the
gas issuing from the aperture o and permitting the latter to escape into the
atmosphere.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :
An apparatus for drawing off liquids under pressure of carbonic acid,
characterized by a receptacle A for receiving a quantity of carbonic acid
corresponding with a predetermined capacity, a pressure reducing valve B con-
nected therewith a piercing tube R, the latter for connecting this apparatus with
the barrel, or other vessel, by passing said tube R through the bung so that when
the tap Z on the barrel is opened, the pressure regulator B automatically
regulates the admission of carbonic acid from the receiver A to the vessel C
without requiring any further manipulation.
Dated the 29th day of January 1894.
NEWNHAM BROWNE.