Improvements in Apparatus for Increasing the Pressure of the Steam in Steam Engines.
Year: 1899

page_text: Date of Application, 14th Apr., 1899
Complete Specification Left, 19th Oct., 1899-Accepted, 25th Nov., 1899
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Increasing the Pressure of the Steam
in Steam Engines.
I, FRIEDRICH AUGUST SPANGENBERG, of Gross-Salze, near Magdeburg, in the
Empire of Germany, Manufacturer, do hereby declare the nature of this invention
to be as follows:
-
The present invention has for its object an improved arrangement of apparatus
for enabling the pressure of steam in steam engines to be increased when desired,
and their effective power to be increased, without any modification being neces-
sary in the construction of existing engines.
For this purpose the improved arrangement of apparatus is placed between the
boiler and the valve chest of the engine; it consists of a steam cylinder provided
with a distributing valve, and having a piston the rod of which is attached to
a second piston moving in a second cylinder forming a part of and a prolongation
of the first one. The latter cylinder which serves as a compression, cylinder, is
connected by means of suitable pipes with the boiler and with a collecting reser-
voir which communicates with the steam chest of the main engine. A valve is
placed on the inlet steam pipe from the boiler, and below this valve a branch
distributing pipe leads to the first-described cylinder, this pipe being provided
with a valve, and between the compressor cylinder and the valve on the inlet
steam pipe is arranged a retaining or check valve which prevents the steam from
passing back to the boiler during compression.
To start the engine the valve on the inlet steam pipe is opened, and the steam
will pass directly into the compressor cylinder, the collector, and the steam chest
of the main engine.
If, after this, it is desired to increase the power of the engine, the valve upon
the inlet steam pipe to the distributing valve of the auxiliary cylinder first
described, is opened, and compression takes place. The pressure of the steam in
the collector rises in direct proportion to the speed of the compressing apparatus,
and the main engine will, therefore, be supplied with steam at a higher pressure,
and its effective power will be thus increased.
101 3
P
1 1000
EDWARDS AND CO.,
Chartered Patent Agents, 65 and 66, Chancery Lane, London,
Agents for the Applicant.
Improvements in Apparatus for Increasing the Pressure of the Steam
in Steam Engines.
.I, FRIEDRICH AUGUST SPANGENBERG, of Gross-Salze, near Magdeburg, in the
Empire of Germany, Manufacturer, do hereby declare the nature of this invention
Price Sd

page_text: and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, and accompanying drawings that
is to say:
The object of the present invention is to increase the useful effect of steam
engines without using a higher pressure in the boilers which supply them with
steam, so that the pressure of steam and consequently of the work done by a
motive power steam engine may be increased as desired, and without making any
alterations in the construction of the ordinary engine.
In a somewhat modified form of construction, the arrangement may also be used
to apply the exhaust steam from one engine to drive another one.
The accompanying drawings illustrate, by way of example, two forms of con-
struction by which the objects desired are attained.
Figure 1 is a side view, partly in section, of the arrangement used for increas-
ing the pressure of the steam coming directly from the boiler.
Figure 2 is a plan, partly in section, of the same arrangement.
Figure 3 shows a side view of the arrangement applied to the utilization of the
exhaust steam of an engine.
The improved arrangement for increasing the power of a steam engine by
increasing the pressure of the steam coming from an ordinary boiler, consists of
an ordinary steam engine cylinder C, a compressing cylinder C, and a collector
or receiver D. The apparatus described is arranged between the boiler or steam
generator and the engine the power of which it is desired to increase.
The cylinder C is provided with a distributing slide valve S, and a piston of
the usual kind, the rod of which K2 carries a second piston K' which works in a
The collector or
compressing cylinder C forming part of the cylinder C.
receiver D is arranged between the compressing cylinder C, and the valve chest S¹
of the motive power steam engine itself, and communicates with the cylinder C¹
by suitable pipes.
The check valve R shown in the drawing prevents the steam from passing back
into the boiler during compression, whilst the valve R' retains the steam com-
pressed in the collector D.
To set the main steam engine in motion, the valve V is opened, so that the
steam coming direct from the boiler passes through the compressing cylinder C,
the collector 1), and the valve chest Si into the cylinder of the engine.
If now it is desired to increase the power of the latter, the valve V is opened,
which admits steam from the boiler into the compressing engine, and sets the
latter in motion. The pressure of the steam forced back into the collector D
rises in proportion to the speed of the compressing engine. The main engine
thus receiving steam at a higher pressure, it is evident that the power developed
and consequently the useful effect of the engine, will be considerably increased.
In the arrangement shown in Figure 3, which serves to utilize the exhaust
steam of a steam engine, the exhaust steam leaving the engine M passes into the
collector or receiver A, instead of being discharged directly into the open air. A
compressing engine takes the steam from this collector and forces it into a
second collector D in which it is compressed to the desired pressure.
The cooled steam which leaves the engine M becomes re-heated by the com-
pression, and acquires again an expansive force sufficient to drive a steam engine.
The compressing engine C¹ is driven by a belt, or directly by the main engine,
If it is desired to utilize the
or even by fresh steam (see Figures 1 and 2).
exhaust steam from a larger engine M to drive a smaller one M¹, the three-way
cock in the exhaust pipe is turned so that the exhaust steam from the larger
engine can pass into the receiver A. When the latter is filled, which can be
easily seen by means of a pressure gauge, the safety valve being only set at of
Steam is drawn
an atmosphere, the compressing engine C¹ is set in motion.
from A and compressed into the collector D. As soon as the required pressure
is reached in the collector D, the engine M¹ is set in action, and continues working
as long as the large engine M, or as the exhaust steam is compressed.

page_text: The improved arrangement allows the exhaust steam, which ordinarily is dis-
charged into the air, to be used a second time, and in this way with a com-
paratively slight expenditure of motive force a very considerable beneficial effect
can be obtained from the engines used.
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. An arrangement for increasing the pressure of steam in steam engines, in
which the steam for the generator is compressed by a compressing cylinder C
into a collector 1), in order to increase the work done by the steam engine with-
out exceeding a determined pressure in the generator.
2. A method of modifying the arrangement claimed in Claim 1, by which the
exhaust steam from a steam engine M is stored in a collector A and is afterwards
compressed by a compressing cylinder C into a collector D), and is then used
to drive a second motive power engine M.
All substantially as described, and illustrated in the accompanying drawings.
11
1
1000
EDWARDS AND CO.,
Chartered Patent Agents, 65 and 66, Chancery Lane, London,
Agents for the Applicant.