Year: 1898

page_text: Date of Application, 24th Nov., 1898
We, JEAN BAPTISTE MARIE ALBERT COARD and ERNEST ALEXIS CHARPENTIER,
both of 107, Boulevard Péreire, Paris, in the Republic of France, Manufacturers,
do hereby declare the nature of this invention to be as follows:-
-
The present application for a patent has for its object a novel rotary explosion
motor capable of being actuated by petroleum spirit, gas, or other suitable
hydrocarbon.
Our motor is characterized by the combination with a cylinder having a rotary
piston, of an outer chamber, in which the admission, the compression, and the
ignition of the hydrocarbon is effected.
This outer chamber is provided with a movable partition which acts as a
slide valve, and serves to effect at the desired moment communication with
the cylinder, so as to enable the piston to receive the impulsive force of the
exploded gases.
This motor is composed essentially of a cylindrical casing in which revolves
a central rotary piston. The casing is closed gas tight, in like manner as the
cylinders of ordinary machines by two fixed ends; upon the casing is placed a
chamber cast solid therewith, or secured upon it. The piston is formed of a
cylindrical mass fitting exactly in the bore of the cylinder. This piston is
cut away over a portion of its periphery to allow the gas escaping from the
chamber to act upon the face of the cavity, which cavity at the moment of the
explosion normally stands opposite the chamber so as to receive the propelling
force. The chamber possesses a slide valve formed of an articulated plate.
The displacement of the slide valve is effected by an oscillating rod connected to
the said slide. This rod traverses the chamber, and is attached externally to a
sliding frame and safety roller. A cam engaging the roller communicates an
alternating motion to the frame. The rotary motion of the said cam is coupled
with that of the motor axle by means of gearing or otherwise. The cam is of
a suitable form to give to the rod the stroke necessary for the displacement_of
the slide which passes from one position into the other with great rapidity. For
this purpose at the moment in which the point of the cam allows the roller of
the frame to escape, a spring forces the rod to return the slide suddenly into
one end position. In order to prevent the shock of this slide against the
internal wall of the chamber, we attach a buffer spring or other equivalent
organ, against which the slide can abut. A valve placed above the chamber
serves for the inlet of the gas. An aperture placed at a suitable point in the
cylinder serves as the outlet.
The operation of the motor is as follows:-
The gases pass into the chamber through the valve. They are delivered and
compressed in the said chamber by means of a pump driven from the axle by
means of a crank or the like. At this moment the cam allows the roller of the
frame to escape, and the spring suddenly returns the rod. The explosion is

page_text: effected at this moment by means of an electric igniter arranged according to
any well known system, and the gases act violently upon the face of the piston,
and communicate to this latter and consequently to the shaft a rotary motion.
It is indispensable that the gearing should be calculated so as to secure an
exact agreement between the motions of the slide and of the piston, so as to
allow either one explosion for each rotation of the piston, or one explosion for
several rotations of this piston.
We may also replace the single cavity of the piston by several grooves or
cavities arranged parallel: such multiple grooves or cavities being in relation
with an equal number of slides, and of explosion chambers.
In order to avoid any loss of gas the slide is provided at its periphery with
metallic or other segments forming a tight joint, but which permit of its easy
motion.
Our motor may be constructed in any suitable metals; we may also replace the
secondary organs of the combination by others designed to fulfil the said
purpose.
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C.,
Patent Agents for the Applicant.
We, JEAN BAPTISTE MARIE ALBERT COARD and ERNEST ALEXIS CHARPENTIER,
both of 107, Boulevard Péreire, Paris, in the Republic of France, Manufacturers,
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:-
The present application for a patent has for its object a novel rotary explosion
motor capable of being actuated by petroleum spirit, gas, or other suitable
hydrocarbon.
Our motor is characterized by the combination with a cylinder having a rotary
piston, of an outer chamber, in which the admission, the compression, and the
ignition of the hydrocarbon is effected.
This outer chamber is provided with a movable partition which acts as a
slide valve, and serves to effect at the desired moment communication with
the cylinder, so as to enable the piston to receive the impulsive force of the
exploded gases.
In a modification of the invention the movable partition acting as a slide valve
can be omitted; in this case the admission chamber mounted on pivots is
animated by an alternating motion and conducts the carburetted mixture opposite
to the active face of the piston.
In order to make the following description more clear we have represented by
way of example our invention in the accompanying drawing, in which
Figure 1 shews a longitudinal section of the rotary motor.
Figure 2 represents a transverse section of the cylinder, shewing the piston
enclosed therein.
Figure 3 is a perspective view of the piston of the apparatus.
Figure 4 is a longitudinal section of the motor with chamber mounted on
pivots.
Figure 5 is an outside lateral view.

page_text: fixed on the casing A. The cam d is mounted on a shaft h revolving in bearings i¹
cast with the casing A; the said shaft h crosses the sides of the frame p
in grooves the cam d is intended to move the slide p and consequently the
chamber D¹ in a direction corresponding to the periods of admittance and com-
pression; the chamber D' is moved in the contrary direction by a spring s
resting on the support f and actuating the rod e and consequently the frame p
and the chamber D¹ so that the latter occupies the position corresponding to
the periods of explosion and escape.
The mixture is admitted into the chamber D¹ by a piece t stopping up the
said chamber and having an inlet pipe discharging into the chamber D¹. This
piece is held in contact with the bottom of the chamber D¹ by a spring v.
A stop cock is placed in a cavity of the piston B which a spring y forces into
contact with the chamber D¹ as soon as the latter begins to move, in order to
obtain the air tight condition necessary for a thorough explosion; a screw z
passing through a groove of the stop cock limits the displacement of the
latter, thus preventing all friction on the cylinder.
The gearing M N O suitably assist the movements of the rotatory piston B
and the oscillating chamber D¹. It is preferable to have one admission and
explosion for two revolutions of the piston.
We do not limit ourselves absolutely to the parts described above; for instance
the oscillating movement of the chamber may be attained by jointed levers,
angle pinions, cams and the like.
Our motor may be constructed in any suitable metals; we may also replace the
secondary organs of the combination by others designed to fulfil the said
purpose.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that
what we claim is:-
1. A rotatory motor characterised by the combination with a cylinder A,
having a rotatory piston B of an outer chamber D in which the admission, the
compression and the ignition of the hydrocarbon is effected.
2. In a rotatory motor as set forth in Claim 1 an oscillating slide for forming
a communication between the explosion chamber and the cylinder substantially
as described.
3. In a rotatory motor as set forth in Claim 1 an oscillating chamber mounted
on pivots occupying two positions corresponding to the periods of admission and
compression and of explosion and escape respectively.
4. In a rotatory motor as set forth in Claim 1, a cylindrical body forming a
piston and having on its periphery one or more cavities corresponding to one
or more explosion chambers the whole substantially as described with reference
to the accompanying drawings.
day or
W. P. THOMPSON & Co.,
Of London, Liverpool, Manchester and Birmingham.

page_text: Figure 6 is a plan view.
This motor is composed essentially of a cylindrical box A in which works a
central rotary piston B. The box A is closed gas tight, in like manner as the
cylinders of ordinary machines by the two ends C C₁; upon this box is placed a
chamber D cast solid therewith, or secured upon it. The piston B, shewn in
Figure 3 is formed of a cylindrical mass, fitting exactly in the bore of the
cylinder A. This piston is cut away over a portion of its periphery, as shewn in
the drawing, to allow the gas escaping from the chamber 1) to act upon the face
B B of the cavity, which cavity at the moment of the explosion normally stands
opposite the chamber D so as to receive the propelling force. The chamber D
possesses a slide valve F formed of a plate articulated at G so that it can
oscillate, and take up the extreme positions F¹ B¹, F", B". The displacement
of the slide F is effected by an oscillating rod H connected to the said slide
by the piece I with slide attachment J. The rod H traverses the chamber D,
and is attached externally to a sliding frame P with safety roller R. A cam K,
engaging the roller R communicates an alternating motion to the frame P.
The rotary motion of the said cam K is coupled with that of the motor axle L
by means of the gearing M N O for example, or by connecting rods or otherwise.
The cam K is of a suitable form to give to the rod H the stroke necessary for
the displacement of the slide F, and that in such a manner that the said slide can
pass from the position F B into the position F B with great rapidity.
For this purpose at the moment in which the point of the cam K allows the
roller R of the frame P to escape, a spring S forces the bar H to return the
slide F suddenly into the position F1 B. In order to prevent the shock of this
slide against the internal wall of the chamber D we attach a buffer spring T
or other equivalent organ, against which the slide can abut. A valve U
placed above the chamber D serves for the inlet of the gas. An aperture V
placed at a suitable point in the cylinder serves as the outlet.
The operation of the motor is as follows:-
The gases pass into the chamber D through the valve U whilst the slide F
is in the position F¹ B¹. They are delivered and compressed in the said chamber
by means of a pump driven by the axle L by means of a crank or the like. At
this moment the cam K allows the roller R of the frame P to escape, and the
spring S suddenly returns the bar H into the position shewn in the drawing so
as to compel the slide F to take the position "B". The explosion is effected
at this moment by means of an electric igniter arranged according to any well-
known system, and the gases act violently upon the face B B of the piston B,
and communicate to this latter and consequently to the shaft L a rotary motion in
the direction indicated by the arrow.
It is indispensable that the gearing M N O should be calculated so as to
secure an exact agreement between the motions of the slide F and of the piston B,
so as to allow either one explosion for each rotation of the piston B, or one
explosion for several rotations of this piston.
We may also replace the single cavity of the piston by several grooves or
cavities arranged parallel; such multiple grooves or cavities being in relation
with an equal number of slides, and of explosion chambers.
In order to avoid any loss of gas the slide is provided at its periphery with
metallic or other segments forming a tight joint, but which permit of its easy
motion.
It
In the modification of the motor shewn in Figs. 4, 5, and 6, the chamber D¹
for admitting the gas is provided with pivots a on which it oscillates; these
pivots are held in place by caps g in the blocks of the casing A. This chamber
is only open at the bottom for the explosion mixture to come in and go out.
has on its upper part an attachment piece for receiving the head of a small
connecting rod C which latter is connected with a sliding frame p having an
oscillating movement effected by means of a cam d; the sliding frame p
is in one piece with a guiding rod e moving freely in the eye of a support f