An Improved Apparatus for Using Liquid Carbonic Acid in Large Quantities.
Year: 1887

page_text: Date of Application, 25th June, 1887.
Specification Accepted, 12th Aug., 1887.
DI MUIFICATION.
An Improved Apparatus for Using Liquid Carbonic Acid in Large
Quantities.
We OSCAR BRÜNLER of Tempelhof near Berlin, Merchant and CARL GUSTAV
ROMMENHÖLLER of Rotterdam, Merchant do hereby declare the nature of said
invention for "AN IMPROVED APPARATUS FOR USING LIQUID CARBONIC IN LARGE
"
QUANTITIES and in what manner the same to be performed to be particularly
described and ascertained in and by the following statement :-
In using liquid carbonic acid in large quantities out of the usual portable flasks
inconveniences occur which chiefly consist in that the supply of heat from outside to
the relatively small surface of the passages of the valve belonging thereto is too small
as compared with the absorption of heat through the expansion of the liquid carbonic
acid, and consequently the gas inside the flask and passages in connection therewith
becomes torpid. This state of torpidity causes obstacles in the working, and danger
also, inasmuch as considerable increase of pressure takes place in the said vessels by
reason of the after gasification of the fixed particles of carbonic acid carried along,
and the expansion of the highly cooled gas upon the later heating thereof, such heat
being taken up by the gas reduced to a low pressure. A further inconvenience
consists in that when the gas is largely used the pressure oscillates or wavers very
much. The variation of pressure in the flask amounts to from 30 to 40 atmo-
spheres, which has for result to limit very much the use of liquid carbonic acid where
a constant high pressure is required for many purposes, further in the case of use on
a large scale the handling of the flasks is troublesome and without a collecting vessel
of larger or smaller capacity the process of impregnating liquids cannot be continuously
carried on.
This invention has for object to do away with the said impediments.
Referring to the accompanying drawing which shews an apparatus such as we
employ for the aforesaid purpose Figs. 1 and 2 are respectively a front view and a
cross section thereof. Fig. 3 a detail view on an enlarged scale and Fig. 4 a modifi-
cation. It consists mainly ;-of a frame A to which is attached a bracket a formed
with-say eight or more semicircular recesses. The portable flasks are held fixed in
these recesses by hinged fastening plates 6 and by insertion of their bottom end in
recesses i. B is a pipe arranged parallel to the bracket a and provided with short

page_text: connecting tubes 8, it is also in connection with stop valves v, and vessel S. w are
elastic tubes which separately connect the flasks with B, their length allowing of their
connection without difficulty to varying heights of flasks. is a connecting tube
leading from the vessel S and in communication with the dirt collector C, stop
valve pressure reducing valve W and stop valve V1.
The dirt collector C Fig. 3 works in the way that the oil,-which upon compression
of the carbonic acid is always being carried along together with the metallic
impurities formed by oxidation on the inner surface of the flasks and set free in
transport upon leaving the small nozzles d with great velocity in the direction of
the arrows is forced against the bottom of the vessel whilst the gas takes it way back
again in the direction of the outflow. By this means the very sensitive reducing
valve W is kept clean and works properly.
When the pressure has left the flasks, these are removed and charged flasks con-
nected in their place. By these arrangements a continuous working is made
practicable as also by reason of the relatively large contact surface exposed to the
outer air, cooling, shrinkage of pressure, and danger is prevented.
The modification shewn in Fig. 4 consists in a different arrangement of the
flasks to that shewn in Figs. 1 and 2.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is :
The combination of the frame A a bi with moveable tubes w, stop valves v, collecting
pipe B, vessel S, high & low pressure stop valves V, V', & reducing valve W for the
purpose specified substantially as described and shewn.
EMIL
CAPITAINE,
89, Chancery Lane, London, W.C.,
Agent for the Applicant.