IMPROVEMENTS IN ROTARY ENGINES
Year: 1885

page_text: I ISAIE PIERRE DILLE, Sculptor, of No 14 Cité Talma, Paris, in the Republic of
France do hereby declare the nature of my invention for IMPROVEMENTS IN ROTARY
ENGINES and in what manner the saine is to be performed, to be particularly
described and ascertained in and by the following statement
-
This invention relates particularly to rotary engines having curved cylinders and
free pistons, and has for its object to render absolute and perfect the working of
such engines and to allow of their being reversed for the purpose of working in
both directions
This latter result is obtained by connecting the disc which carries the steam
valves with a reversing gear lever placed externally, the said steam valves being
provided with proper articulations.
In principle, these improved engines are composed of three essential parts viz
the pistons disc which is the principal and active part, the steam valves disc, and
the external casing which is divided by the pistons into three curved cylinders
The said external casing contains the two above mentioned discs One of its
ends or covers, the bottom one is provided with suitable openings for the admission
of steam and its exhaust
In the case of non-reversing engines, the said bottom cover and the steam valves
disc are combined into one, the steam valves being hinged direct on the said cover
itself Although the said steam valves are worked up and down during the motion
of the engine, they, together with the cylinders and the exhaust ports remain
stationary and in the same relative position
A reference to the annexed illustrations will assist in the comprehension of the
details of the invention and of the working of the non-reversing and reversing
rotary engines
Fig 1 is a longitudinal section and
Fig 2 a transversal section of a non-reversing rotary engine.
Figs 3 to 8 relate to a reversing rotary engine
Fig 3 being a longitudinal section
Fig
a transversal section
Fig 5 a section through 1 2
Fig 6 a section through 3 4.
Ti 7 an alavation of the atoom walizos disa

page_text: B, the axle bearing, and
C, the encular plate are all cast into one piece and bolted or rivetted on to D, the
boiler, the plate C acts as a cover or bottom to
E, a cylindrical casing containing the essential organ of the engine
P, is a disc constituting the said essential organ, that is to say it carries the
pistons p, p, p, as well as the driving pulley V which acts at the same time as a
regulating flywheel The said disc and fly-wheel are keyed on and at the
extremity of the shaft G which revolves in bearing B and bottom cover C-A
cover F maintains the disc P in its place in the cylinder E The bottom cover C
18 provided with a boss in which are managed two steam ports o,
exhaust ports O O' These ports are circularly in communication (Fig 2) with
each other, o, o communicating besides with the steam boiler, by means of the
pipe T, and 0 0¹ with the atmosphere or with any condenser, by means of the
Pipe Ti
o' and two
The dimensions of the above said boss are such that there remains, between it
and the casing or cylinder E an annular space of a quadrangular section and which
I divide into two parts or chambers by means of the valves or flaps H, and H¹
These flaps are hinged on the boss itself and, being in the immediate vicinity of the
steam ports, when deflect-d, cover the said steam ports
In the so formed curved cylinders are three curved pistons p p p which, as
has already been explained, belong to the disc P, the latter being keyed on the
axle G The admission of the steam is regulated by means of a valve I J worked
from a lever L
S
If the steam is admitted in steam pipe T the pistons dist being in the position
indicated in Fig 2, the pressure of the steam forces the valves H, H' against the
cising and the steam finds in the valves so placed the resting point or fulcrum
which it requires in order to effectively act on the pistons p p p which are then
propelled in the direction indicated by the arrows
It will be observed (Fig 2) that the steam begins its action on piston p and
continues it on piston p" and that after the said pistons have travelled a certain
distance under the action of the steam pressure, the steam is exhausted from the
anuular spaces contained between the pistons p p and p p through the exhaust
ports and O¹
If the rotation of the pistons is continued, the piston p¹ coming into contact
with the valve H' depresses the latter and passes in the following compartment or
cylinder as it is shown in dotted lines (Fig 2) when the piston p¹¹ is supposed to
be passing over the valve H The valve H¹ springs back to its former positions,
owing to the pressure of the steam in the steam port o¹ and the steam exerts its
pressure on the piston p¹ thus continuing the motion of the engine The same effect
occurs each time one of the pistons depresses a steam valve
It will thus be seen that this engine contains three chambers into each of which
the steam pressure alternately acts while it is achieving its effects in the second
and being exhausted in the third one The result is a constant action on the three
pistons taken together and the transmission of a continuous regular motion the
main shaft G by means of the intermediary of the pistons disc P
If we now refer to Figs 3 to 8 which illustrate the details of a reversing rotary
engine it will be seen that the valves H H¹ instead of being hinged on the boss of
the cylinder's bottom are attached to and hinged on a special disc K. situated
between the said boss and the pistons disc P The axle of this said valves disc is
prolonged so as to receive a reversing letter M The boss of the cylinder's
bottom C is provided with two steam ports o¹ and four exhaust ports 0 0¹
011 0111 These ports are diametrically opposed, in pairs, and are obturated o
opened according to the direction in which the engine is running, by means of the
covering plates or obturators m. m³, n, n' which belong to the valves disc
The

page_text: valves disc, is, moreover, indented on each side of each valve'a hinge according to
profiles b, b, c, c¹, which correspond to those of the boss in front of the steam
ports.
It will be readily understood that whatever may be the position occupied by the
valves in the engine, that is to say by the valves dise displaced in the direction of
the arrow in hg 7, the indentations b or b¹, and c or c¹ will always correspond
to the indentations in the boss of the cylinder's bottom, thus giving the said valves
the necessary room when they are depressed on one side or the other according to
the direction of the motion of the engine
So that when the motor is running in the direction indicated by the plain long
arrows (steam valves shown in plain lines) the exhaust ports O and 0¹ are opened
whereas O and O"" are obturated by the plates m m² and n n' The reverse
takes place when the engine is running in the direction indicated by the long
dotted arrows (steam valves shown dotted)
The steam exerts its pressure on the various parts of the engine in the same
manner as bas been described in the case of the non reversing engine
In order to facilitate the change of position in the valves H and H', their free
ends work in a light recess, h made in the external casing E, the point & becoming
during the short period of motion of the valves disc, the center of oscillation of
the valves relatively to the disc which receives its motion from the reversing
lever M-The forms, dimensions, or number of parts of the engine made of course
be made to vary and I do not limit myself to the forms, shapes, sizes, etc. of the
parts shown in the drawings
Having thus fully described the said invention and the manner of performing
the same I wish it to be understood that I claim the Improvements in rotary
engines having curved cylinders and free pistons as described in this specification
and illustrated in the annexed drawings and more particularly
1° The particular arrangements relating to non reversing rotary engines as
described, and illustrated Figs 1 and 2
2° The particular arrangements relating to reversing rotary engines and
characterized by a reversing gear composed of an independent disc provided with
valves H H¹ as described and illustrated in Figs 3 to 8
London 1st Anni1 100K
1