Improved Hydraulic Non-return Valve for Gasometers.
Year: 1899

page_text: Date of Application, 26th Aug., 1899-Accepted, 14th Oct., 1899
COMPLETE SPECIFICATION.
Improved Hydraulic Non-return Valve for Gasometers.
I, FRITZ TRENDEL, Engineer, of 22, Michaelkirchplatz, Berlin, in the Empire of
Germany, 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:-
This invention has for its object to provide an improved valve for gasometers
for preventing the return of gas from the bell to the generator.
In the accompanying drawings: Fig. 1 is a sectional elevation of a gasometer
for acetylene gas fitted with a valve according to this invention and Fig. 2 is a
sectional elevation of a valve box and valve.
Referring to Fig. 1, a is an acetylene generator, b a water tank, c the gas
collecting bell, d the gas-pipe between the water tank and the generator, e a box
placed on the gas-pipe.
:
If acetylene passes out of the generator a, through the pipe d, it will raise
the box e, and then flow under the bottom edge thereof into the collecting bell c.
On the other hand if the pressure from the generator a is withdrawn, by its
being opened for example the box will rest on the pipe e, and remain filled with
acetylene, preventing any return of the acetylene from the bell
generator a.
c to the
!
In Fig. 2f represents the gas supply pipe, is a chamber with charging
cone k, furnished with a closing-screw n and a feed-pipe extending to the
bottom, in being the gas outlet pipe.
The apparatus is inserted in the acetylene conduit and filled to a certain
height with a liquid, such as glycerine, by means of the charging cone k. As
long as the pressure prevailing in the pipe f exceeds the pressure in the
chamber i, the gas will raise the box and then pass under the lowest edge of the
box into the chamber i, and can escape through the gas outlet pipe m. When,
however the pressure in the chamber i exceeds the pressure in the pipe f, any
return of acetylene through the pipe f is prevented.
The apparatus described has the advantage of preventing the return of acety-
lene and the "striking back" of ignitions through the pipe to the gas-reservoir,
without the gas having any considerable resistance to overcome when entering,
whether from the generator or through the pipe. This closing-box being made of
light material, if necessary, can be easily raised above water, and a gas pressure
of only a few centimetres is required for overcoming this resistance. It has
the further advantage that it adapts itself to the variations in the level of the
shutting-off liquid, whether in the tank bor in the reservoir i, advantages
which could not be obtained by the ordinary closing contrivances by means of a
bent pipe running into the liquid or a bell arranged directly over the mouth of
the pipe. This hydraulic return valve, moreover, furnishes a security against
the absorption of the acetylene as in bent pipes.

page_text: 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:-
Hydraulic non-return valve for gasometers consisting in a box e inverted
over the gas supply pipe and floating on the sealing liquid in the gasometer.
Dated this 26th day of Anout 1800
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.