Year: 1897

page_text: A communication from HENRI CHAUDUN, of 93, Rue Richelieu, Paris, in the
Republic of France, Engineer.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a new rotary motor working by ignition of any
explosive mixture, gas, gasoline, oil etc., with or without compression of said
mixture as desired.
The new motor is chiefly constituted by the combination of two principal parts
or chambers substantially of the same construction and similar to that of the motor
which formed the subject of my correspondent's former application for Patent
No. 11015 dated 3rd May 1897.
I will describe in a few words this construction by saying that each part com-
prises a casing consisting of two combined intersecting chambers communicating
with each other at the points of intersection, which chambers are provided with
sectors mounted respectively on parallel shafts and acting as rotating pistons.
These sectors of similar construction and combined in the same manner as
those described in my correspondent's previous specification are respectively
arranged in pairs one of each chamber on one spindle and the other of each
chamber on the second spindle, these two parallel spindles rotating together by
means of two toothed wheels of the same diameter engaging together and arranged
outside the casings between the two parts of the motor.
According to this new arrangement one part of the apparatus constitutes the
driving part, and comprises in its upper part an explosion chamber provided
with an electric ignition device and in the lower part recesses or passages
terminating in an outlet-passage. The outlet-passage and the explosion chamber
are symmetrically arranged between the explosion chambers so that said outlet
and the explosion chamber act alternately in combination with each of the
chambers and their respective sectors as will be hereinafter explained.
If the motor is to work with compression, the other half of the apparatus
constitutes the part which draws in, compresses and distributes the explosive
mixture to the driving part. It comprises at the top the inlet for carburetted air,
gas or other fluid, and at the bottom an opening communicating with a short
pipe for the passage and distribution of the fluid drawn in through the upper
opening by the alternate action of the sectors respectively working in the chambers
of this half of the apparatus, and which are constituted in the same manner as
those of the other half, the passages being arranged on each side of, the median
line of intersection of the chambers in the same manner as in the driving part
of the apparatus.

page_text: To the short outlet pipe is connected a pipe or pipes leading to the distributing
chamber near the explosion chamber of the driving chamber and, also, to a two-way
cock communicating by a pipe with the chamber or passage in communication with
the inlet passage and with the inlet pipe for carburetted air or gas and with a short
branch air-supply pipe which can be opened or closed by a valve in order to
enable the supply of air to the explosive mixture to be regulated as desired.
In the chamber for distributing explosive mixture to the driving chamber is a
valve controlled by a spring arranged so that it is stronger than the compression
produced by the compressing chamber in the said distributing chamber and
conduits leading to it. This valve is seated in an orifice communicating with the
explosion chamber of, the driving chamber and especially used for the purposo
of intercepting all communication of the explosion chamber with the distribution
chamber and its conduits at the moment of explosion.
The sectors of the supply or compression chamber are respectively keyed on the
same spindles as the sectors of the driving chamber, so that when rotating the
supply sectors respectively and alternately draw in a charge and respectively and
alternately close the passage through which the drawing in of the charge takes
place as soon as the corresponding sectors of the driving chamber begin to
respectively and alternately place their two chambers in communication with the
explosion chamber. Suppose one of the driving sectors is about to act as a driving
sector, its chamber being in communication with the explosion chamber the other
side of said cylinder being in communication with the outlet for the escape of
combustion gases which have previously done this work. At this moment the
other sector of this element forms a wall or part of the cylinder. As regards the
other half of the apparatus one sector will have finished drawing in its charge
through the inlet and will close the communication of the latter with its chamber
and will take with it in its rotation the mixture which it has just drawn in, in
order to force and compress it into the conduits and to the distributing chamber
as soon as it has uncovered the outlet passage thereto, at which moment the
communication of the latter with the other chamber will be closed by its sector..
As regards this other sector in this part it will begin to draw in through the
inlet orifice at the same time that on its other side it forces out and compresses
the mixture which it has previously drawn in, in the conduits and distributing
chamber.
When the sectors are in the reverse position to that described the sectors which
acted as operating sectors now form the walls of the cylinders, while the other
sectors act one to produce motive power on one hand and exhaust on the other
hand, and the second to take with it the mixture which it has just drawn in and
which it is about to force into and to compress in the distribution chamber.
At one position of the cock the motor works with compression, the distributing
chamber communicating only with the orifice through which is forced out from
the supply chamber the mixture drawn in alternately by its sectors; if said cock
is turned the motor will work without compression the distribution of the mixture
then taking place directly by alternative drawing in produced by the sectors of
the driving chamber, the passage of the plug of said cock putting the distributing
chamber and its conduits into open communication with the passage leading.
into the chamber into which the explosive mixture is drawn in.
«
In spite of this working without compression, the sectors of the supply"
chamber continue to rotate, thus drawing in, taking with them, and forcing out
the mixture without compressing it, for as the passage or bore of the plug places
the conduits in communication with the inlet passage, the mixture drawn in
from the inlet chamber through the inlet passage will return into the said chamber
through the plug passage and its conduit, thus forming a cycle which will assist
in increasing the thorough mixture of the explosive charge which is then drawn
in directly by the driving element.
The result of this arrangement is that the motor can be easily started. The

page_text: cock being set so as to avoid compression, after the motor has been started, it is
turned to produce compression so that the motor will then work with compression,
which of course is more economical.
A communication from HENRI CHAUDUN, of 93, Rue Richelieu, Paris, in the
Republic of France, Engineer.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, 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:-
This invention relates to a new rotary motor working by ignition of any
explosive mixture, gas, gasoline, oil, etc. with or without compression of said
mixture as desired.
In the accompanying drawing,
Fig. 1 is a longitudinal vertical section of the motor according to the present
invention.
Fig. 1 is a view of the two way cock.
Figs. 2 and 2, 3 and 3 are respectively vertical cross sections Figs. 2 and 3
being sections on the line X Y of Fig. 1 and Figs. 2 and 3 sections on the
line X'Y' of the same figure. Figs. 2 and 2 correspond to one stage and Figs. 3
and 3 to the opposite stage of working.
As can be easily seen from the drawing the new motor is chiefly constituted
by the combination of two principal parts or chambers A A¹ substantially of the
same construction. Each part A A¹ comprises a casing consisting of two
combined intersecting chambers B, C, B C communicating with each other at
their points of intersection A3, which chambers are provided with sectors FG FG¹
mounted respectively on parallel shafts. DE and acting as rotating pistons FF
in tlie parts B B and G G in the parts CC.
These sectors F, G, F, G are respectively arranged in pairs, FF" on one
spindle D, and G G on the second spindle E, these two parallel spindles rotating
together by means of two toothed wheels K of the same diameter engaging together
and arranged outside the casings between the two parts A A' of the motor.
According to this new arrangement one part of the apparatus A constitutes
the driving part and comprises in its upper part an explosion chamber M provided
with an electric or other ignition device ' and in the lower part recesses or
passages M M terminating in an outlet passage M. The outlet passage M' and
the explosion chamber M are symmetrically arranged between the chambers BC
so that said outlet Mand the explosion chamber M are alternately in combination
with each of the chambers B and C and their respective sectors F and G as will
be hereinafter explained.
If the motor is to work with compression, the other half of the apparatus A¹
constitutes the part which draws in, compresses and distributes the explosive
mixture to the driving part A. It comprises at the top the inlet N for carburetted
air, or gas or other fluid and, at the bottom, an opening N¹ communicating with

page_text: a short pipe N for the passage and distribution of the fluid drawn in through the
upper opening N by the alternate action of the sectors FIG respectively working
in the chambers B'C' of this half A¹ of the apparatus and which sectors are
constituted in the same manner as those FG of the other half A, the passages N
and is being arranged on each side of the median line of intersection A² of the
chambers B and C in the same manner as in the driving part of the apparatus.
To the short outlet pipe N³ is connected a pipe or pipes N3 N leading to the
distributing chamber No near the explosion chamber M of the driving chamber A
and, also to a two-way cock No communicating by a pipe with the chamber U
and with the inlet pipe 02 for carburetted air or gas and with a short branch
air-supply pipe O³ which can be opened or closed by a valve 04 in order to enable
the supply of air to the explosive mixture to be regulated as desired.
In the chamber Np for distributing explosive mixture to the driving chamber A
is a valve P controlled by a spring Parranged so that it is stronger than the
compression produced by the compressing chamber A', in the said distributing
chamber N and conduits N N³ Na N¹ leading to it. This valve P is seated in an
orifice P³ communicating with the explosion chamber M. of the driving chamber A
and especially used for the purpose of intercepting all communication of the
explosion chamber M with the distributing chamber N³ and its conduits at the
moment of explosion.
.com-
The sectors FG of the supply or compression chamber A¹ are respectively
keyed on the same spindles DE as the sectors FG of the driving chamber A as
shown in the drawing, so that when rotating in the directions indicated by the
arrows, the sectors F G respectively and alternately draw in a charge and respec-
tively and alternately close the passage N through which the drawing in of the
charge takes place, as soon as the corresponding sectors F G of the driving
chamber A begins to respectively and alternately place their two chambers B C in
communication with the explosion chamber M. In Figs. 2 and 2* suppose one
of the driving sectors F is about to act as a driving sector; its chamber being in
communication with the explosion chamber M and the other side of said
cylinder B being in communication with the outlet M for the escape of u
bustion gases which have previously done their work. At this moment the other
sector G of this element A forms a wall or part of the cylinder. As regards the
other half of the apparatus A the sectors Fi G will be in the position shown in
Fig. 2 one sector F will have finished drawing in its charge through the inlet N
and will close the communication of the latter with its chamber B' and will take
with it in its rotation the mixture which it has just drawn in, in order to force
and compress it into the conduits N1 N2 N3 N and to the distributing chamber N
as soon as it has uncovered the outlet passage N' thereto; at which moment the
communication of the latter with the other chamber C' will be closed by its
sector G¹. As regards this other sector G¹ it will begin to draw in through the
inlet orifice N at the same time, that on its other side it forces out and compresses
the mixture, which it has previously drawn in into the conduits N' N³ N³ Ñ+ and
distributing chamber N5.
'
In Figs. 3 3 when the sectors FG FG are in the reverse position to that
described and shown in Figs. 2 2 the sectors F G¹ form the walls of the cylinders
while the other sectors GF act; one to produce motive power on one hand and
exhaust on the other hand, and second, to take with it the mixture which it has
just drawn in and which it is about to force into and to compress into the dis-
tributing chamber No:
At one position of the cock N shown in Fig. 1 the motor works with compression
the distributing chamber N³ communicating only with the passage N1 through
which is forced out from the supply chamber A', the mixture drawn in alternately
by its sectors F'G¹; if said cock is turned into the position shown in Fig. 1^ the
motor will work without compression the distribution of the mixture then taking
place directly by alternate drawing in, produced by the sector FG of the driving

page_text: chamber A, the passage N7 of the plug of said cock No, putting the distributing
chamber No and its conduits N N³ into open communication with tlie passage ()
leading into the chamber O¹, into which the explosive mixture is drawn in.
In spite of this working without compression, the sectors FG of the "supply"
chamber A continue to rotate thus drawing in taking with them and forcing out
the mixture without compressing it for as the passage or bore N of the plug No
places the conduit in communication with the inlet chamber O₁ the mixture drawn
in from the inlet chamber 04, through the inlet passage N will return into the
said chamber through plug passage N7 and its conduit O thus forming a cycle
which will assist in increasing the thorough mixture of the explosion charge
which is drawn in directly by the driving element A.
The result of this arrangement is that the motor can be easily started. The
cock No being set as in Fig. 1 so as to avoid compression after the motor has been
started it is turned so that the motor will work with compression which of course
is more economical.
Having now particularly described and ascertained the nature of this invention
as communicated to me by my foreign correspondent and in what manner the same
is to be performed I declare that what I claim is:
1. A rotary internal combustion engine consisting of two casings each forming
two intersecting cylinders each of which cylinders contains a sector piston; which
sector pistons are carried on two intergearing shafts common to each casing one
sector piston of each cylinder being carried on each shaft and a tubular connection
between the casings in combination with inlet passages for the charge and air
in the compression cylinder and an inlet passage and ignition chamber in the
working cylinder and an exhaust outlet substantially as set forth.
2. A rotary internal combustion engine consisting of two casings each forming
two intersecting cylinders, each of which cylinders contains à sector piston, which
sector pistons are carried on two intergearing shafts common to each casing one
sector piston of each cylinder being carried on each shaft and a tubular connection
between the casings a branch provided with a valve extending from the tubular
connection to the inlet passage of the supply cylinder in combination with inlet
and outlet passages substantially as set forth.
3. The combination and arrangement of parts constituting the complete rotary
engine substantially as described or illustrated, in the accompanying drawings.
Dated this 12th day of March 1898
'BOULT & WADE,
Agents for the Applicant.