IMPROVEMENTS IN ROTARY ENGINES
Year: 1883

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki Proprietor of the firm
of J Brandt & G. W v. Nawrocki, Patent Solicitor and Civil Engineer of
124 Leipzigerstrasse, Berlin Germany, for an Invention of "IMPROVEMENTS
IN ROTARY ENGINES a communication from Louis d'André of Riga Russia and
Ludwig Loewe and Company of Berlin Germany
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 4th July
1883.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J Brandt
& G. Wv Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasse
Berlin Germany "IMPROVEMENTS IN ROTARY ENGINES (a communication from
Louis d'André of Riga Russia, and Ludwig Loewe and Company of Berlin
Germany)
This rotary steam engine is mounted on a bedplate and consists mainly of a
steam cylinder in which the piston is keyed eccentrically on to the revolving
horizontal shaft. The piston is provided with a port entering it from one end
and which in the interior opens into a steam passage passing to the circular
circumference.
The steam cylinder is provided with an exhaust pipe and on the top of the piston
rests an abutment piece which with its upper half circular surface fits steam tight
into a guide and with its lower concave surface fits against the top of the piston so
that a good steam tight fit is obtained in any position of the eccentric piston.
The guide is kept steam tight in a box on the top of the cylinder and is pressed
downwards by two adjustable helical springs.
The steam from the boiler enters through a steam pipe and cylinder cover into.
the inlet port of the piston and goes therefrom to the steam passage in the cylinder.

page_text: and the entry of the steam begins as soon as the aperture of the steam passage is
reached by the revolving of the. piston behind the abutment piece.
The filling of the cylinder continues until the inlet port in the piston has passed
the inlet port in the cover of the cylinder, and then the expansion of the steam
begins. The filling of the cylinder with which the engine is to work ie the rate
of. expansion, is regulated by the length of the inlet port in the piston The
exhaust steam passes off at an opening at the side. The engine can also be used as
a twin engine, in which the piston's are placed at 180° to each other.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Gerard Wenzeslaus von Nawrocki in the Patent Office on the
4th January 1884. .
.
"
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J. Brandt
& G. W v Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasse
Berlin Germany "IMPROVEMENTS IN ROTARY ENGINES (A communication from
Louis d'André of Riga, Russia, and Ludwig Loewe and Company of Berlin
Germany)
In the accompanying drawings Figure 1 is a cross section; Figure 2 longitudinal
section, Figure 3 end view, and Figure 4 a plan of the rotary steam engine
mounted on a bed plate It consists mainly of a steam cylinder A in which the
piston B is keyed eccentrically on to the revolving horizontal shaft O. The piston B
is provided with a port C, see Figures 1 and 2, entering it from one end, and which
in the interior opens into the steam passage D passing to the circular circumference,
as shown at Figure 1..
The steam cylinder is provided with an exhaust pipe G, and on the top of the
piston rests an abutment piece F which with its upper half circular surface fits
steam tight into the guide F' and with its lower concave surface fits against the
top of the piston so that a good steam tight fit is obtained in any position of the
eccentric piston B.
•
The guide is kept steam tight in a box on the top of the cylinder A, and is
shown at Figure 2 pressed downwards by two adjustable helical springs
The steam from the boiler enters through the steam pipe P and cylinder cover
at E into the inlet port C of the piston and goes therefrom to the steam passage D in
the cylinder and the entry of the steam begins as soon as the aperture D' of the
steam passage D is reached by the revolving of the piston behind the abutment
piece F..
The filling of the cylinder continues until the inlet port C in the piston has
- passed the inlet port in the cover of the cylinder at E and then the expansion of
the steam begins. The filling of the cylinder with which the engine is to work
i.e. the rate of expansion is regulated by the length of the inlet port C in the

page_text: piston B. The exhaust steam passes off at an opening G at the side. The engine
can also be used as a twin engine, in which the pistons are placed at 180° to each
other.
Having now described the nature of the said invention and in what manner the
same is to be performed I declare that I claim as the invention communicated
to me :-
In rotary steam engines, the eccentric piston B with the inlet port C and the
steam passage D in combination with the cylinder A, the abutment piece F, inlet
port E in the cylinder cover, and the exhaust port G substantially as set forth.
In witness whereof I the said Gerard Wenzeslaus von Nawrocki have hereunto
set my hand and seal this Thirty first day of December in the year of our Lord
One thousand eight hundred and eighty three.
GERARD WENZESLAUS VON NAWROCKI (L.S.).