Improvements in Apparatus for Drawing Off Liquids under Pressure.
Year: 1896

page_text: Date of Application, 20th Apr., 1896-Accepted, 6th June, 1896
COMPLETE SPECIFICATION.
Improvements in Apparatus for Drawing Off Liquids under
Pressure.
I, NIKODEM CARO, of 1 Roonstrasse, Berlin, in the Gorman Empire, Ph.D.,.
and Chemical 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, reference being had to the
accompanying drawings and to the letters and figures marked thereon, that is.
to say :-
This invention relates to improvements in apparatus for drawing off liquids under-
pressure, and has reference more particularly to the construction of cock having
two passages, the larger of which serves for the outlet of the liquid, while the
smaller one is so constructed that it regulates, in a convenient manner, the passage
of the gas under pressure from the gas reservoir to the vessel containing the liquid,
without the use of any special devices for this purpose.
The improvements consist in that the narrow passage for the gas under pressure
has a tapering lateral extension or notch, running in a circumferential direction
round the surface of the plug, for the purpose of regulating, during the opening
and closing of the cock, the passage of the gas into the vessel for the liquid, in
proportion to the quantity of liquid flowing out. I thus ensure that the pressure
in the said vessel will remain approximately constant.
And in order that my invention may be readily understood I will describe the
same fully with reference to the accompanying drawings, which show by way of
example two different forms of the improved apparatus.
Figs. 1 and 2 show a portable draw off apparatus.
Figs. 3, 4, and 5 are transverse sections, through the passages b and f, and the
notches d.
Figs. 6 and 7 show a syphon head constructed according to the invention, and
applied to a cask.
A is the reservoir for the gas under pressure, B the vessel for the liquid, C the
plug of the cock, having the passagos a, for the gas, and b for the liquid; is a
passago or channel communicating with the reservoir A for the gas under pressure,
and g is a corresponding passage communicating with the reservoir for the liquid.
The orifices of the passage a, on the surface of the plug, are provided with notches
or extensions d, which taper gradually or diminish in area away from the passage a.
The length of the notches corresponds to the diameter of the large bore or passage.
for the liquid.
b
When the plug is turned, and the passage b therein cominences to pass in front
of the oponing in the draw off pipe D, the diminished portion of the notch d passes.
in front of the gas passage in the casing of the cock, and the gas under pressure
can pass from the reservoir A into the vessel B, but only in very small quantities.
The more the cock is opened, the more the transverse area of the notch passing in
front of y and f, is increased, and the more carbonic acid will pass over, and the
greater the quantity of liquid that will flow out, as the outflow position will be
increased as the cock is turned. When the draw-off cock is completely opened,
there is free communication on the one hand between the reservoir for the liquid
and the atmosphere, and on the other hand between the reservoir for the liquid and
the reservoir for the gas.

page_text: The relative positions of the passage in the casing of the cock, and the passages
and notches in the plug thereof, are shown in Figs. 3, 4, and 5, to enable them to
be better understood.
On the cock being closed, the before described actions are of course reversed.
It will be seen from the peculiar shape of the passage, in the plug, for the gas
under pressure, that the latter passes over in the same proportion as the liquid
flows from the vessel, so that too great a pressure cannot oucur in the latter.
Having now particularly described and ascertained the nature of my p
tion, and in what manner the same is to be performed, I declare
claim is :-
at. I
'cock, one for
he gas passage
1. In a draw-off apparatus having two passages in the plug
the outflow of liquid and the other for compressed gas, provid
with tapered notches extending oiroumferentially partly arouni de surface of the
plug, whereby the amount of gas passing from the gas reserv to the vessel for
the liquid is regulated according to the outflow of such liqu !, and the pressure
above the liquid is maintained constant, substantially as descrived.
2. The application of the improved draw-off apparatus to portable vessels,
syphons, and the like.
3. My improvements in apparatus for drawing off liquids under pressure,
substantially as hereinbefore described and shown with reference to the drawings.
Dated this 20th day of April 1896.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, Loudon, and 54, Market Street, Nottingham,
Agent for the Applicant.