Improvements in Apparatus for Ejecting or Withdrawing Vapours and Gases from Pipes or Chambers.
Year: 1891

page_text: Date of Application, 1st May, 1891
Complete Specification Left, 1st Feb., 1892-Accepted, 5th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Ejecting or Withdrawing Vapours
and Gases from Pipes or Chambers.
A communication from LUDWIG ROHRMANN, of Krauschwitz, in the Empire of
Germany, Manufacturer.
I, EDMUND EDWARDS, of the firm of Edwards and Co., Patent Agents and
Engineers, of 35, Southampton Buildings, Chancery Lane in the County of
Middlesex, do hereby declare the nature of this invention to be as follows:-
:―
The improved apparatus which forms the subject of the present invention has
for its object the ejection or withdrawal of injurious and corrosive vapours and
gases, which are produced in certain chemical industries.
The apparatus consists entirely of clay or porcelain, so that it is not corroded and
destroyed by the gases passing through it. By the special arrangement of the
apparatus a considerable ejecting effect is produced by a very small relative
consumption of steam.
The improved apparatus consists of an external case somewhat pear-shaped in
form, and having a steam pipe at right angles communicating with its lower or
larger end. In the upper part of the apparatus is arranged the ejecting device,
which is carried upon a horizontal disc, and consists of a cylindrical or conical
vertical projection upon the upper side of the disc. The edge of the disc is fitted
into a recess on the inner side of the casing before the clay or porcelain of which
they are formed is burned.
The vertical projecting cylinder or cone is made hollow from the top down to the
disc, which is necessary for the quicker drying of its sides so that it may be more
perfect and afford greater security against the steam pressure and high temperature
to which it is subjected.
If it were formed solid it would not dry uniformly with the outer casing, and its
end would project some distance above the upper annular edge of the casing which
fits round it. Moreover if formed solid it would be liable to be distorted horizontally
and the parts to become separated.
The hollow form of the projecting piece is therefore necessary.
The largest diameter of the surrounding case is at the point where the disc is
fitted into it, and then it contracts gradually up in a conical form. With its upper
annular edge it embraces the upper end of the projecting cylinder or cone as already
described.
The lower side of the disc is brought down to a point at its centre so that the
entering steam may be effectually distributed towards a series of small holes, which
are made through the disc close to the inner side of the case, so that the jets of
steam passing through them into the space above the disc pass up against the inner
conical side of the casing.
As already described, the parts of the apparatus made of damp clay or porcelain
and fitted together are then dried and burned. The upper end of the projecting
piece and the surrounding annular case is then ground off horizontally so as to leave
a narrow annular opening for the passage of the steam between the case and the
central cylinder. This opening is perfectly concentric with the central cylinder.
If the ejecting device were not made to form in the first instance a part of the
surrounding casing at its upper end, so that a space existed between them before
burning, the relative positions of the central cylinder and the casing will be liable
to become distorted so that they cease to be in a truly concentric position, and the
apparatus would then be useless.

page_text: For the withdrawal of vapours or gases from a chamber the apparatus is arranged
in a tubular shaft which is fixed upon the top of the chamber from which the gases
are to be withdrawn, and steam is admitted through the steam pipe up to the
necessary pressure of four or five atmospheres. The steam leaves the apparatus
through the upper annular opening described with sufficient force to produce the
necessary ejecting effect.
The gases expelled with the steam can if desired be collected and any valuable
products recovered from them.
As the apparatus cannot be always arranged in chemical works in the manner
above described, the improved ejecting apparatus may in such cases be combined
with the pipe through which the gases are introduced and discharged. For this
purpose the steam pipe is made in a line with the axis of the ejector instead of at
right angles to it as above described, and a flange is formed upon it upon the upper
side of which the outer pipes for the gases are fixed. In this case the gases are
introduced through a pipe at the side of the ejector and are delivered through a
vertical one above the latter, the former pipe being connected with the chamber
from which the gases are to be withdrawn.
In this case all parts of the apparatus are made of clay or porcelain so as not to
be affected by the passage of corrosive gases.
D
1001
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Ejecting or Withdrawing Vapours
and Gases from Pipes or Chambers.
A communication from LUDWIG ROHRMANN, of Krauschwitz, in the Empire of
Germany, Manufacturer.
I, EDMUND EDWARDS, of the firm of Edwards and Co., Patent Agents and
Engineers, of 35, Southampton Buildings, Chancery Lane, in the County of
Middlesex, 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 and accompanying drawing, that is to say :-
The improved apparatus which forms the subject of the present invention has for
its object the ejection or withdrawal of injurious and corrosive vapours and gases
which are produced in certain chemical industries.
The apparatus consists entirely of clay or porcelain so that it is not corroded and
destroyed by the gases passing through it. By the special arrangement of the
apparatus a considerable ejecting effect is produced by a very small relative
consumption of steam.
In the accompanying drawing which is in illustration of the invention,
Figure 1 shews a convenient form of the apparatus.
The improved apparatus consists of an external case a somewhat pear shaped in
form, and having a steam pipe b at right angles communicating with its lower or
larger end, from a suitable boiler.
In the upper part of the case is arranged the ejecting device, which is carried
upon a horizontal disc c¹, and consists of a cylindrical or conical vertical projection c³
upon the upper side of the disc c¹. The edge of the disc e' is fitted into a recess on
the inner side of the casing a before the clay or porcelain of which they are formed
is burned.
The vertical projecting cylinder or cone c³ is made hollow from the top down to
the disc as shewn, which is necessary for the quicker drying of its sides so that it
may be more perfect and afford greater security against the steam pressure and
high temperature to which it is subjected.

page_text: If it were formed solid it would not dry uniformly with the outer casing a, and
its end would project some distance above the upper annular edge d of the casing
which fits round it. Moreover if formed solid it would be liable to be distorted hori-
zontally and the parts to become separated.
The hollow form of the projecting piece is therefore necessary.
The largest diameter of the surrounding case a is at the point where the disc c¹
is fitted into it, and then it contracts gradually up in a conical form. With its
upper annular edge it embraces the upper end of the projecting cylinder or cone c²
as already described.
The lower side of the disc is brought down to a point at its centre so that the
entering steam may be effectually distributed towards a series of small holes e, which
are made through the disc close to the inner side of the case (as shewn in plan in
Figure 3), so that the jets of steam passing through them into the space fabove the
disc pass up against the inner conical side of the casing.
As already described, the parts of the apparatus made of damp clay or porcelain
and fitted together are then dried and burned. The upper end of the projecting
piece and the surrounding annular case a is then ground off horizontally down to
about the line g-g, so as to leave a narrow annular opening for the passage of the
steam between the case and the central cylinder. This opening is perfectly
concentric with the central cylinder c².
If the ejecting device were not made to form in the first instance a part of the
surrounding casing at its upper end, so that a space existed between them before
burning, the relative positions of the central cylinder and the casing will be liable
to become distorted so that they cease to be in a truly concentric position, and the
apparatus would then be useless.
For the withdrawal of vapours or gases from a chamber the apparatus is arranged
in a tubular shaft h, (Figure 2) which is fixed upon the top of the chamber from
which the gases are to be withdrawn, and steam is admitted through the steam
pipe b up to the necessary pressure of four or five atmospheres. The steam leaves
the apparatus through the upper annular opening described with sufficient force to
produce the necessary ejecting effect. The gases expelled with the steam can if
desired be collected and any valuable products recovered from them.
As the apparatus cannot always be arranged in chemical works in the manner
above described, the improved ejecting apparatus may in such cases be combined
with the pipe A (Figure 4) through which the gases are introduced and discharged.
For this purpose the steam pipe is made in a line with the axis of the ejector a
instead of at right angles to it as above described, and a flange i is formed upon it
upon the upper side of which the outer pipes for the gases are supported and fixed.
In this case the gases are introduced through a pipe k at the side of the ejector and
are delivered through a vertical one above the, latter, the former pipe being
connected with the chamber from which the gases are to be withdrawn.
In this case all parts of the apparatus are made of clay or porcelain so as not to
be affected by the passage of corrosive gases.
Having now particularly described and ascertained the nature of the said inven-
ion and in what manner the same is to be performed, I declare that what I
laim is :-
1. An ejecting apparatus formed of clay or porcelain in one piece, and consisting
f a hollow external case a, containing an ejector carried by a perforated plate or
lisc let into and united with the sides of the case, and consisting of a hollow
ylinder or cone c² the upper edge of which is united with the annular top of the
ase, both being ground down, after the entire apparatus has been burned, sufficiently
o leave a narrow annular opening between them, through which a jet of steam
asses to effect the ejection of the gases, substantially as described and shewn.
2. In combination with the apparatus claimed in the first claim, an external
ase A carried by a flange upon the steam pipe and provided with a lateral opening

page_text: and pipe through which the gases to be discharged are drawn, substantially as
described and illustrated in Figure 4.
Dated this 1st day of February 1892.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.