Improvements in Apparatus for Sampling Gases for Analysis.
Year: 1895

page_text: Date of Application, 1st June, 1895
Complete Specification Left, 14th Feb., 1896-Accepted, 14th Mar., 18:6
Improvements in Apparatus for Sampling Gases for Analysis.
I, BERNARD LOURENS DE RIDDER of No. 15 Koningplein, Amsterdam in
Holland, Engineer do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in apparatus for drawing samples of gas.
from retorts, for analysis.
In carrying the invention into effect, I provide a bell which dips into a well of
water or other liquid capable of sealing it around the bottom edge. Inside the bell,.
there is either a float or a fixed dome.
The gas supply pipe from the retort is fitted with a throttle valve and is.
connected to the bell in any suitable way. If the connection is to the top of the
latter, it should be by means of a length of flexible tube.
a
The bell is fixed with a lifting device adapted to create a vacuum under the bell
between it and the surface of the liquid. This device may be either
counterpoise variable in respect of its weight or a slack train variable in respect of
its rate..
There may be a layer of glycerine upon the surface of the liquid.
T
1000
PHILLIPS & LEIGH,
Agents for the Applicant..
I, BERNARD LOURENS DE RIDDER of No. 15 Koningplein, Amsterdam, in-
the Kingdom of Holland, 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 :-
The subject-matter of the above invention consists in an apparatus for exhausting.
gases of different kinds for the purpose of analysis.
Referring to the accompanying drawing:
Figure 1 is a vertical section, and
Figure 2 is a vertical section of the apparatus at work.
a is a water vessel, in which the gas bell b is immersed; which, as is clearly shown.
in Figure 1, can be raised. It is shorter than a, so that the top of it may lie
underneath the level of the water contained in the vessel a. is a float which
serves to keep the gas sucked in and the water apart, thereby preventing the
absorption of the former by the latter.
On the top of the bell, there is fixed a hook for attaching the line d, which is
carried over a pulley e and carries at its other end a weight f. This weight is for
the purpose of raising the bell b and may consist of several plates, so that the force
with which it raises the said bell may be altered at will.
To the top of the bell, the tube c for conducting the gas is attached, there being
interposed, however, the indicating bottle for the purpose of indicating the:
DO27

page_text: working of the apparatus. That part of the tube which is connected direct to the
bottle may be made of india-rubber, while the rest may be made of copper or other
rigid material.
The pipe e is led from the gasometer or the gas producing apparatus. Attached
to the non-rigid portion of the tube c, a clamp may be used to compress the pipe
and reduce its suction. The use of this clamp instead of the usual cocks, has
the advantage that the regulating device (cock, clamp, or the like) can never
leak.
To suck in the gas for analysing, the weight is made heavy till it is in a
condition to raise the bell bout of the position shown in Figure 1. Now the
clamp, attached to the flexible part of the pipe c, is opened, while watching
the bubbles in the bottle h, till the required rate of suction is obtained. As
the result of the action of the weight, a vacuum is formed between the top
of the bell baud the float g, which vacuum sucks in gas on one side of the
float, and sucks up water on the other. The float g is raised by the water so
that the water cannot flow over it and does not present a very large absorption
surface. When the bell 6 has been raised high enough and sufficient gas has been
obtained, the weight can be decreased and the further rising of the bell stopped.
It is generally arranged that the weight shall reach a firm bottom before the
water of the vessel a shall sink below the under edge of the bell b.
If the gas is now required for analysis it is removed by opening the clamp
attached to the tube i and removing part of the weight f, whereupon the bell will
slowly sink and the gas be compressed and forced out of the tube i.
Now as the bell can sink below the level of the water the gas will all be
completely expelled by the float g and the water entering the bell b. The rate at
which the bell b sinks can be also regulated by means of opening or shutting to the
required degree a clamp on the tube i.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is :-
An apparatus for exhausting gas for the purpose of analysis, consisting of a bell b
which
for receiving the gas by suction, and not so high as the water vessel
contains the bell b so that the water, when the bell b is in its lowest position, flows
over the bell b, so that the bell is thoroughly emptied of the gas which had been
sucked in.
PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.