Gas Absorbing Apparatus for Ascertaining the Quantity of a Particular Gas in a Gaseous Mixture.
Year: 1896

page_text: Date of Application, 16th Nov., 1896
Complete Specification Left, 16th Aug., 1897-Accepted, 25th Sept., 1897
PROVISIONAL SPI
TION.
Gas Absorbing Apparatus for Ascertaining the Quantity of a
Particular Gas in a Gaseous Mixture.
I, MAX ARNDT of Monheims Allee, Aachen, Germany, Engineer, do hereby declare
the nature of this invention to be as follows:-
The apparatus of this invention comprises a vertical vessel capable of being divided
by means of a valve like closure carried on a spindle, into two parts or chambers, or
one part may be connected to the other to form the chambers. The upper chamber
is fitted with cocks for the supply thereto and withdrawal therefrom of any gaseous
mixture, say smoke gas. The bottom chamber is supplied with a gas absorbing
medium which according the the kind of gas it is desired to measure, may be either
liquid or solid such as potash lye for carbonic acid and phosphorous rods for oxygen.
In the former case a body built up of several parts is attached to the underside of
the closure so as to be raised in a wetted or saturated state into the upper smoke
chamber. In the latter case the phosphorous rods would be raised in a net or basket
like container. In each case the absorbing medium absorbs the particular gas it is
desired to measure so as to attenuate the general body of the gaseous mixture, and
this attenuation or dilution is indicated by a measuring tube dipping into a liquid
container said measuring tube receiving through a cock, or being in communication
with the attenuated gaseous mixture, the degree of attenuation representing the
quantity of the absorbed gas being read off from a scale on the measuring tube, the
rise of liquid within the measuring tube being the greater the more the gaseous
mixture is attenuated or has weight absorbed from it."
Dated this 16th day of November 1896.
CAPITAINE & VON HERTLING,
89 Chancery Lane, London, W.C., Agents for the Applicant.
5 Gas Absorbing Apparatus for Ascertaining the Quantity of a
Particular Gas in a Gaseous Mixture.
I, MAX ARNDT of Monheimsallee, Aix-la-Chapelle, Germany, 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
0 statement:-
The apparatus of this invention has for object to ascertain the quantity of a
particular gas in a gaseous mixture in a simple, and practically sufficiently exact
imanner, by absorption of the particular gas.

page_text: In the accompanying drawing Fig. Lis a vertical sectional view of the apparatus of
the invention and Fig. 2 a similar view of a detail.
The apparatus comprises a gas vessel a fitted, with any suitable means, as for
example the cocks g, g², for opening and closing communication therewith; a vessel b
for the reception of the absorbing medium; and the valve like closure c for shutting
off at d, when the absorption process is not being carried on, the communication
between the two vessels. The valve c carries or has connected to it an absorbing
body h in the case of a liquid absorbing medium i (Fig. 1) being employed, or a
suitable holder made for example basket like of wire netting and supplied with a
solid absorbing medium k, (Fig. 2) such for example as phosphorous bars, for
ascertaining the quantity of oxygen in a gaseous mixture and which holder (Fig. 2)
or absorbing body (Fig. 1) may be moved from the rod e attached thereto and working
air tight through a stuffing box f.
is a measuring tube of a size in a certain proportion to that of the gas vessel a
and provided with.a volume per cent. scale n. Said ineasuring tube is in connection
with the apparatus in any suitable way, for example by a third way g' of the cock g¹,
and dips into a liquid o provided in a vertically movable indicating vessel m.
Springs 2 or equivalent means may be employed for holding the valve c firm upon
its seat d during the time the absorption process is not going on, or when the
apparatus is being moved about, the springs being released previous to undertaking
the absorption process.
The absorbing medium varies according to the kind of gas of. which it is desired
to ascertain the quantity, and upon this also depends the construction of the absorbing
body h. This latter may be composed of plates, discs, rings, coils, cylinders, brush
like objects or net work holders supplied with glass chips, pumice stone, moss,
etcetera.
The apparatus, which may be worked by unskilled persons, operates as follows:-
The valve c being closed and the cocks g', g, open, the vessel a is charged in the
direction of the arrows 1, 2, or inversely, with the gaseous mixture to be tried, for
example, smoke gas, the contents of which in carbonic acid have to be ascertained,
first bringing the gaseous mixture to the pressure of the outer atmosphere by easily
raising or lowering the indicating vessel m until the surface of the liquid in this and
in the measuring tube stands at zero on the scale n. The cocks g, g¹, are then
closed, so as to shut off the gas vessel a from the outside, except that it
communicates with the measuring tube through the way 4 of the cock g', and
the valve c with the absorbing body h (Fig. 1) or absorbing medium (Fig. 2)
raised up into the gas vessel a from the rod e. In the former case (Fig. 1) the
absorbing medium i, for carbonic acid, is potash lye. The body he now raised into
the vessel a is intimately wetted, or saturated or partly charged with the lye which
absorbs the carbonic acid out of the smoke gas whereby the same is diluted or
rarefied the amount of which rarefaction is indicated or equipoised by a corresponding
ascent of the liquid column in the measuring tube l.
After completed absorption, that is, when the liquid in the measuring tube no
longer rises, the indicating vessel m is lifted up until the surface of the liquid therein
stands at the same level as that in the tube . The gas still remaining enclosed in
the apparatus is then again under atmospheric pressure and the quantity of the
absorbed gas, in this example the carbonic acid of the smoke gas, which is therefore
equal to the quantity of the liquid that has risen in the measuring tube above the
zero point, can now be read off on the scale n.
The absorbing body h or the absorbing medium is now returned to the vessel b
and this latter shut off gas tight from the gas vessel a by means of the valve c so that
after freshly charging the vessel a with another quantity of gaseous mixture the
apparatus is ready for the performance of another analysis, as the absorbing medium
does not contact with the surface of the vessel a.
The gas residuum remaining in the vessel 6 after each absorption process does not
affect the next following analysis as it is divested by the absorbing. medium of the
gas to be ascertained.

page_text: Further the gas vessel a may also be connected direct with a vacuum gauge, the
pointer of which would after each absorption process indicate the rarefaction of the
gas.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
A gas absorbing apparatus in which a closure c-carrying an absorbing body h
(Fig. 1) or an absorbing medium k (Fig. 2) and separating the gas vessel a and the
vessel b containing the absorbing medium gas tight from each other when the
absorption process is not being performed is so arranged that through the rod e
moving air tight is a stuffing box or the like it can together with the absorbing body h
(Fig. 1) wetted, or saturated, or partly charged with the absorbing medium i or
together with the solid absorbing medium (Fig. 2) be so introduced into said gas
vessel that the absorbing medium does not come in contact with or wet the inner
walls of the same but absorbs the desired gas from the gaseous mixture, whereby this
latter is rarefied, which rarefaction is in equilibrium with the liquid column rising
from the vertically movable indicating vessel m into the measuring tube / communi-
cating with the gas vessel, so that when after completed absorption, by raising the
vessel m the surface of the liquid therein is brought to the same level as that in the
tube the quantity of the absorbed gas in proportion to the contents of the gas
vessel which it is desired to ascertain can be read off in percentage volume direct
from the percentage volume scale n of the measuring tube l, and in which apparatus
the gas vessel a may be connected with a vacuum gauge the pointer of which
indicates the degree of rarefaction of the gas, substantially as described and shewn.
Dated this 16th day of August 1897.
CAPITAINE & VON HERTLING,
⚫89 Chancery Lane, London, W.C., Agents for the Applicant.