Year: 1887

page_text: Date of Application, 22nd Aug., 1887.
Specification Accepted, 23rd Sept., 1887.
I, WILLIAM CORNELIUS PETER ASSELBERGS, of the Gasfabrick, Bergen-op-Zoom, 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:-
My invention relates to hydraulic mains for gas-works, and has for its chief object
to enable the removal of the tar and other impurities contained in such mains without
interfering with the operation of the apparatus. To this end my said invention
comprises the improvements hereinafter described.
In the accompanying drawing
Figure 1 is a plan partly in horizontal section of my improved apparatus.
Figure 2 is a vertical section of the same on the line X, 2, and
Figure 3 is a section on the line y, y, Figure 1.
a, is the trough or main proper, a¹ is the cover thereof and b, b, are the dip pipes
which pass through the said cover and which are in communication with the retorts and
with their lower ends dip into the liquid in the said main.
d, is the outlet through which the gas and the surplus tar flow out of the main and e,
is a slide which works in grooves f, and which is adapted to be raised or lowered to
correspondingly raise or lower the level of the seal in the main.
9, is a plate which is fixed in a manner hereinafter described opposite the outlet d,
and dips down into the liquid so as to prevent the tar at the bottom of the main from
remaining stagnant.
h, is a tank into which the tar flows as it leaves the main. This tank is provided
with a spout or overflow i, which is placed below the level of the surface of the liquid
in the main for a purpose which will hereinafter appear.
The said tank is connected by a pipe k, with the bottom of the main a, the
passage through the said pipe being normally closed by a cock l. A pipe d¹, extends
from the outlet d, into the liquid in the tank h, so as to prevent the escape of gas
through this tank. The gas passes through the pipe d", to any suitable point for
further treatment.
When it is desired to remove a portion of the tar from the bottom of the main the
cock 1, is opened whereby a portion of the liquid from the main a, owing to its being

page_text: above the level of the liquid in the tank h, will flow through the pipe k, into the said
tank, thence escaping by the overflow.
m, m, are shields which are rivetted or otherwise secured to the cover a¹, of the
apparatus and extend below the level of the liquid in the main as shewn in figure 3 so
that no gas from the latter can enter the spaces n, n, enclosed by the said shields.
The cover a', over the spaces n, n, is provided with caps or lids o,o. By taking off
these caps or lids a rake or scraper can be introduced into the main a, to enable the
removal of any tar which may adhere to the bottom of the main and which is too thick
to permit of its removal by the opening of the cock l. To facilitate the operation of
the scraper or other tool the side of this main is preferably inclined as shewn at a",
Figure 3.
The two shields m, m, are arranged one on each side of the outlet d, and form a
foundation to which the plate g, is secured, the gas passing above this case and between
the ends of the plates m, m.
The end of the pipe k, is provided with a removable cap p, to enable the interior of
the said pipe to be cleaned.
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 :
1. The combination with a hydraulic main for gas-works of a tank connected
therewith at its lower part and having an overflow below the level of the liquid
in the said main, a cock or valve between the said tank and the lower part of
the main, and an outlet or overflow from the main into the said tank substantially as
described.
2. A dip plate arranged before the tar outlet or overflow of the main in such a
manner the tar in escaping therefrom causes the tar in the lower part of the main
to be kept in motion substantially as described.
3. The combination with a hydraulic main for gas-works of one or more shields
extending below the level of the liquid of the same and otherwise jointed in
such a manner that no. gas from the main can pass therethrough substantially as
described.
4. The improved apparatus constructed and arranged substantially as hereinbefore
described with reference to the accompanying drawing.
Dated the 22nd day of August 1887.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.