AN IMPROVED MEASURING APPARATUS FOR LIQUID CARBONIC ACID
Year: 1886

page_text: We Dr EDUARD LUHMANN of Niedermendig, Rhine Province, in the German
Empire, Chemist and CARL GUSTAV ROMMENHÖLLER of Rotterdam in the King-
dom of Holland, Merchant do hereby declare the nature of said invention for
"AN IMPROVED MEASURING APPARATUS FOR LIQUID CARBONIC ACID" and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The apparatus of this invention is shewn in the accompanying drawing in which
Fig. I is a longitudinal section thereof Fig. II a cross section through the line a. b.
of Fig. I, and Fig. III a modified form thereof in longitudinal section. It is for
the purpose of measuring off liquid carbonic acid from the well known wrought
iron flasks easily and without danger, and in determined quantities into hermetically
closed vessels for the usual commercial purposes such as the production of gaseous
carbonic acid, or for the impregnation of liquids with carbonic acid. It consists of
a measuring vessel K having two stuffing boxes E, F; wing nuts M1, M2, M³, M*
of like dimensions; packing pieces C, D; two tubular parts A, B provided with
stuffing boxes, and round sliding rod G. At the bottom of the measuring vessel K
is a semicircular groove in a line with the stuffing boxes E, F, A, B, C, D, through
which the sliding rod G, may be slid. o, p, q, r, are the packings of the four
stuffing boxes, consisting of rings of soft leather smeared with a lubricant, which
are compressed or tightened up when necessary by means of the corresponding
wing nuts, working over a screw thread on the outside of the stuffing boxes. By
this means the sliding rod G may be worked air tight through the several stuffing
boxes and passages or bores. Through the centre of the sliding rod for a distance
extending from to w and with openings at these points is a passage u When
the rod G is in the position shewn in Fig. I the passage a which is for the inlet of
the liquid carbonic acid is in communication with v, u, w, and K, in such manner
that liquid carbonic acid may pass from a wrought iron flask or other container
connected to the face of the passage a into K, whilst the passage between K and
the outlet passage b is closed. When the rod G is by means of the handles slid
so far inwards that w reaches to t and v to the measuring space K, then this latter
is in communication with the outlet passage b, through the passage u whilst the
passage between a and K is closed. In the modification shewn in Fig. 3 which is
a simpler form of the apparatus, the measuring vessel K is fixed firmly on the end
of the sliding rod G, the central passage u opening direct into the same at v, thus
D "

page_text: the measuring vessel moves with the sliding rod. As is clearly shewn in the
drawing the number of stuffing boxes in this modification is only three with a
similar number of wing nuts or glands for the compression of the packing.
When the sliding rod G is in the position shewn in Fig. III, the liquid carbonio
acid contained in K may pass through u, w, b into a close container in communi-
cation with b by means of a tube or other suitable connection. When the rod G
is by means of the handle z slid so far inwards that W stands in communication
with the passage a and the passage b closed, the 'liquid carbonic acid may flow out
of the flask which we will suppose to have been connected to the inlet a, through a,
W, u, v, into the measuring vessel K, and so on the measuring vessel being
alternately filled or partly filled, and emptied.
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 ;.
A measuring apparatus for liquid carbonic acid in which a rod packed in and
passing through stuffing boxes when caused to slide backwards and forwards is
alternately in communication-by means of a central or axial and one or more
lateral passages in the same-with the carbonic acid to be measured and the
measuring chamber on the one hand, and on the other hand with the measuring
chamber and a vessel or receptacle into which the carbonic acid is to be discharged
substantially as described and shewn.
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Th100R