IMPROVEMENTS IN ROTATORY ENGINES
Year: 1862

page_text: LETTERS PATENT to Edvard Scheutz, of Brompton, in the County of
Middlesex, Engineer, for the Invention of "IMPROVEMENTS IN ROTATORY
ENGINES."
Sealed the 28th November 1862, and dated the 4th June 1862.
PROVISIONAL SPECIFICATION left by the said Edvard Scheutz at the
Office of the Commissioners of Patents, with his Petition, on the
4th June 1862.
I, EDVARD SCHEUTZ, of Brompton, in the County of Middlesex, Engineer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
ROTATORY ENGINES," to be as follows:-
This Invention relates to certain improvements in the rotatory engines for
which Letters Patent were granted to John Henry Johnson, bearing date the
30th of October 1860, No. 2656, and consists in so constructing such engines
as to enable them to be worked expansively if desired. For this purpose a
steam port is made to open into one end of the cylinder at the side thereof
communicating with the valve chest, and the end of the piston at that part
has a number of chambers or recesses formed in the surface thereof, such
chambers or recesses being made to travel in front of the steam port above
referred to, and consequently they alternately open and close that port, thereby
cutting, off the steam at any previously determined part of the revolution of
the piston. A direct steam communication is also made with the valve chest,
and a. cock or valve is fitted therein, so that the steam may either be led at once

page_text: to the valve chest by opening the cock, or the cock may be closed and the
steam diverted through the separate passage and through the steam port above
to the valve chest by opening the cock, or the cock may be closed and the
steam diverted through the separate passage and through the steam port above
referred to, in which latter case the engine will work capausively.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edvard Scheutz in the Great Seal Patent Office on the 3rd
December 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDVARD
SCHEUTZ, of 34, Grove Place, Brompton, in the County of Middlesex, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of June, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Edvard Scheutz, Her special license that I, the said Edvard
Scheutz, my executors,' administrators, and assigns, or such others as I,
the said Edvard Scheutz, my executors, administrators, or assigns, should
at any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "IMPROVE-
MENTS IN ROTATORY ENGINES," upon the condition (amongst others) that I, the
said Edvard Scheutz, my executors or administrators, by an instrument in
writing under my hand and seal, or under the hand and seal of one of them,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said. Edvard Scheutz, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the follow-
ing statement, reference being had to the accompanying Drawings, and to the
letters and figures marked thereon, that is to say :-
My said Invention relates to certain improvements in the rotatory engines
for which Letters Patent were granted to John Henry Johnson, bearing date the
Thirtieth day of October, One thousand eight hundred and sixty, No. 2656, and
consists in so constructing such engines as to enable them to be worked expan-

page_text: sively if desired. For this purpose a steam port is made to open into one
end of the cylinder at the side thereof communicating with the valve chest, and
another port communicating with the former one and the steam pipe, and the
end.of the piston at that part has a number of chambers or recesses formed in
the surface thereof, such chambers or recesses being made to travel in front of
the steam ports above referred to, and consequently they alternately, open and
close the communication between those ports, thereby cutting off the steam at
any previously determined part of the revolution of the piston. A direct
steam communication is also made with the valve chest, and a cock or valve
is fitted therein, so that the steam may either be lead at once to the valve chest
by opening the cock, or the cock may be closed and the steam diverted through
the separate passage and through the steam ports above referred to, in which
latter case the engine will work expansively.
And in order that my said Invention may be fully understood I shall now
proceed more particularly to describe the same, and for that purpose I
shall refer to the Figures on the Sheet of Drawings hereunto annexed, the
same letters of reference indicating corresponding parts throughout both the
Figures.
Figure 1 of my Drawings represents a transverse vertical section of my
improved rotatory engine, and Figure 2 is a side elevation of the same partly
in section.
A is the tapered or slightly conical cylinder; B, the rotatory piston; C, the
rotatory slide valve, and D, the main or direct steam pipe leading to the valve
chest E, all as described in the Specification of the Patent herein-before
referred to. From this steam pipe there is a branch pipe F leading to the
steam port G, which opens into the top or side of the cylinder near one end
thereof (see Figure 2). Near to the orifice of this port in the cylinder there
is a second port or steam passage G' leading from the cylinder into the valve
chest E. The piston B is prolonged at this end of the cylinder, and in this
prolongation are cast or otherwise formed a number of recesses or cham-
bers H, H, of a width sufficient to enclose both the steam ports G and G',
and of a length transversely to the piston greater or less according to the
degree of expansion desired, the longer such chambers the less will be tho
expansion, and vice versa. I is a steam cock or other suitable valve for
admitting steam direct into the valve chest on starting the engine, after which
this cock is closed, and steam allowed to enter only through the ports or
passages G, G', to the valve chest, and thence by the passages K, K', or L, L',
(according to the direction in which the engine is working) to the main body
of the cylinder. As the piston rotates the chambers H, H, pass in succession

page_text: past the ports G, G', and establish a communication between them, allowing
the steam to enter during the time only such ports are in communication, and
then to cut off the steam by the passage of the solid portions of the piston
left between the chambers H. I do not confine myself to the number of these
recesses or chambers H, but when six diaphragms or slides are employed
in the piston, as shown in my Drawings, I use either three or six of such
recesses; in all cases; however, the number will depend upon the number of the
diaphragms or slides in the piston.
. Having now described and particularly ascertained the nature of my said
Invention, and the manner in which the same is or may be used or carried
into effect, I would observe in conclusion that what I consider to be novel
and original, and therefore claim as the Invention secured to me by the
herein-before in part recited Letters Patent is the general construction
and arrangement of rotatory engines, whereby they may be worked expansively,
as herein-before described.
In witness whereof, I, the said Edvard Scheutz, have hereunto set my
hand and seal, this Third day of December, in the year of our Lord
One thousand eight hundred and sixty-two.
EDVARD SCHEUTZ. (L.S.)