New or Improved Steam Pressure Reduction Valve.
Year: 1895

page_text: Date of Application, 29th July, 1895
Complete Specification Left, 15th Apr., 1896-Accepted, 16th May, 1996
PROVISIONAL SPECIFICATION.
New or Improved Steam Pressure Reduction Valve.
I, FRIEDRICH ERNST OTTO, of Dortmund in the Empire of Germany,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
The reduction valve to which this invention relates is intended to be inserted in
the steam pipe in order to furnish, for any suitable purpose, a certain quantity of
steam at a determined pressure.
It possesses over the valves hitherto employed for this purpose the advantage
of being charged with a counterweight which increases automatically by raising
a number of independent plates or additional weights according as the valve is
opened more or less.
For this purpose the rod of the valve is provided exteriorly with a cross frame
and lever on which is suspended a counterweight. The rod of the latter possesses
a collar which during the ascent of the counterweight raises successively a series
of plates supported freely in a frame between two inclined partitions.
According to the required quantity and force of the steam, the valve will be
opened more or less and will lift not only the counterweight but at the same time
so many plates that the total charge will correspond with the pressure of the
quantity of steam required. As soon as this pressure is attained the valve will
close again and the plates will fall against the inclined partitions by which they
are supported.
The inclined partitions are fixed by hinges and the inclination may be varied by
means of screws, thus permitting the distance of the plates from each other to
be varied. This advantage is very important as it permits the maximum charge
required for the valve to be obtained by a longer or shorter stroke.
In order to control the tension or force of the steam, two manometers are fixed
to the box of the valve.
I FRIEDRICH ERNST OTTO, of Dortmund in the Empire of Germany,
Manufacturer, 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 reduction valve to which this invention relates is intended to be inserted in
the steam pipe in order to furnish for any suitable purpose a certain quantity of
steam at a determined pressure.
It possesses over the valves hitherto used for this purpose the advantage of

page_text: being charged with a counterweight which increases automatically by raising a
number of independent plates or additional weights according as the valve is opened
more or less.
In order that the invention may be more easily understood I will now refer to
the annexed drawing in which Fig. 1 is a vertical section through the valve and
Fig. 2 is a side view of the same.
a is the valve inserted in the steam pipe b and baving its rod provided externally
with a cross frame e and lever d on which is suspended a counterweight c. The rod f
of the latter is provided with a collar g which during the ascent of the counter-
weight raises successively a series of plates h h 12 supported freely between two
inclined partitions i of a frame k suspended from the steam pipe b.
According to the required quantity and force of the steam, the valve will be
opened more or less and will lift not only the counterweight e but also at the same
time so many plates 1 h 2 that the total charge will correspond with the pressure
of the quantity of steam required. As soon as this pressure is attained the valve
will close again and the plates will fall against the inclined partitions by which
they are supported.
The inclined partitions i are fixed by hinges and their inclination may be varied
by means of screws m thus permitting the distance of the plates 1 h 2 from each
other to be varied. This is very important as it permits the maximum charge
required for the valve to be obtained by a longer or shorter stroke.
In order to control the tension or force of the steam two manometers n n 1 are
fixed to the valve box.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
:―
1. A steam pressure reduction valve provided with a counterweight variable
according to the stroke of the valve, and characterised by the use of a series of
additional weights in the form of plates hh1 h2 which are supported freely in a
frame k between two inclined partitions and which are successively raised or
abandoned according as the valve is opened more or less and thus increase or
diminish automatically the total charge of the counterweight, substantially as
described and illustrated.
2. The manner of varying the distance of the additional plates or weights from
each other by varying the inclination of the partitions which are hinged to the
frame k and adjustable by nuts n n 1 all substantially as set forth.
Dated this 15th day of Anvil 1900
E. P. ALEXANDER & SON,
Chartered Patent Agents,
19 Southampton Buildings, Chancery Lane, London, W.C.,
Filing Agents.