Year: 1898

page_text: LA SOCIÉTÉ CHAUVIN ET ARNOUX, of 186, Rue Championnet, Paris, in the
Republic of France, Engineers, do hereby declare the nature of this invention
to be as follows:--
This invention relates to an improved gas or petroleum motor characterized by
a three-period cycle enabling an impulse of the motor-piston to be obtained for
each revolution of the crank. The three-period cycle is obtained by employing a
movable segment which is independent of the piston, and forms the fundamental
part of the improved motor.
Our invention will be readily understood from the following description
reference being had to the accompanying specimen drawings in which
Figure 1 shows part of our motor comprising the cylinder, the piston and their
accessories, in longitudinal section.
Figure 2 shows our motor seen from the rear end of the cylinder.
Figure 3 shows, in horizontal section, the exhaust-chamber or silencer.
In these various figures, like letters of reference indicate corresponding parts.
As will be seen from the drawings, our improved motor comprises a cylinder a
consisting of a simple weldless steel tube, screw-threaded at its two ends. One of
the ends of this tube is screwed into the crank-casing or chamber b; into the other
end is screwed a cylinder cover c. To facilitate this, the end or cover of the
cylinder is provided on its outer side with a hexagonal projection id cast thereon
which can be easily acted upon by means of a suitable key or spanner for
introducing or removing the said cover. Into the cover of the cylinder is also
screwed the electric igniting device e..
In the interior of the cylinder, can move a piston f provided with packing-
rings g. In the bottom of the piston is fixed, by the aid of two nuts h, a rod i of
which one end forms a bearing for the head of the connecting-rod j, the axis of
which is the pin k; on the other end is fixed a thin plate having an external
diameter equal to the internal diameter of the cylinder and serving to carry with
it, during the driving stroke of the piston, the movable and independent segment
or hollow cylindrical piece m.
At a suitable point in the travel of the piston, that is to say, at about the middle
of its travel, are formed two screw-threaded holes n and o in the cylinder. In

page_text: the hole n which serves for the exhaust of the burnt gases, is screwed an exhaust-
chamber p, provided with a spring-valve q and exhaust orifices p', p¹.
The piston f is shown in the position which it occupies after having passed
over a little more than half of its travel, completely uncovering the exhaust-
aperture and at the moment when it commences to uncover the orifice o for the
admission of the explosive mixture supplied by the carburettor r.
The said carburettor, which is screwed into the hole o in the cylinder, consists
of a very thin discs of a diameter a little less than that of the carburettor
chamber. On this disc s is fixed a central rod provided at its other end t with a
spring which enables the disc s to close the passage through the gas or petroleum
tube u.
The travel of the discs is limited by the aid of a screw-threaded cap v.
The air which is to be mixed with the gas or petroleum vapours to form the
The
explosive mixture, enters the carburettor-chamber through the orifices a.
partial vacuum produced by the suction of the motor causes the disc valve s to
open to a degree which can be easily regulated by the aid of the screw-cap v.
The very simple operation of our motor can now be very easily explained. In
the first phase, which we will suppose to be the driving phase, the piston, driven
forward by the explosion of the mixture ignited by the electric igniting device e,
soon passes the orifice n of the exhaust chamber. The burnt gases raise the valve q
and partially escape until they are very nearly in equilibrium, in pressure, with
the atmosphere. From this moment, the piston, in continuing its travel, uncovers
the suction-orifice o and produces a partial vacuum which allows the disc valve s
to open the inlet-orifice for the gas or petroleum which is to mix with the air
entering at to form the explosive mixture. The drawing-in of this mixture
continues until the piston reaches the end of its travel and the plate / has
brought the movable segment m into the position m' m' which corresponds to the
closing of the two orifices o, n for admission and exhaust. The admission or
drawing-in phase immediately succeeds the explosion or driving phase.
The last phase of the cycle is the phase of compression of the body of gas
comprising the new (explosive) gases and part of the burnt gases from the previous
explosion. This last phase takes place during the return stroke of the piston.
The piston having reached the forward end of its travel the movable segment m
is then in the position m', m' above mentioned which enables it to simultaneously close
the two orifices o and n for admission and exhaust. In returning, the piston leaves
the segment m in this position m¹, m¹ until the moment when the rear end of
the piston engages the segment m, and carries the said segment with it, at the
same time compressing the fresh mixture until it reaches the end of its travel,
without allowing any part of the said mixture to escape through the orifices o
and n.
Finally, in the last part of the return stroke of the piston, it will be seen
that the mixture cannot escape by any valve or exhaust orifice since these are closed
by the piston itself. The advantage here obtained is that one is enabled to ensure
that the mixture shall always be compressed to the same degree, and consequently
obtain regular working of the motor.
The very light connecting-rod is formed by a weldless steel tube of diameter
and thickness in proportion to the forces to be transmitted thereby. The heads of
the connecting-rods and y are very light and are simply cottered and brazed.
The motor is provided with two twin fly-wheels, keyed on the motor-shaft 1
which is made in two parts, these fly-wheels moving in the chamber & forming the
exhaust or silencer.
The crank-pins 3 serving to transmit the driving power to the shaft through
the crank fly-wheels, instead of being fixed to the latter, as is done usually, can,
on the contrary, turn in the arms of the fly-wheels.
The products of combustion, after having passed into the fly-wheel chamber
forming a silencer, pass away through a valve 4 which provides for the automatic
regulation of the speed of the motor. This valve is provided with apertures 5
formed in its piston and with apertures 6 formed in its cylinder as well as with an
air-cock 7 for regulation.

page_text: The forms, details, accessories, materials and dimensions of our improved
motor can obviously be varied without in any way departing from the nature of
our invention.
11
↑
1000
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.
We, LA SOCIÉTÉ CHAUVIN ET ARNOUX, of 186, Rue Championnet, Paris, in the
Republic of France, Engineers, 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 an improved gas or petroleum motor characterized by
a three-period cycle enabling an impulse of the motor-piston to be obtained for
each revolution of the crank. The three-period cycle is obtained by employing a
movable segment which is independent of the piston, and forms the fundamental
part of the improved motor.
•·
Our invention will be readily understood from the following description
reference being had to the specimen drawings filed with our Provisional
Specification, in which
Figure 1 shows part of our motor comprising the cylinder, the piston and their
accessories in longitudinal section.
Figure 2 shows our motor seen from the rear end of the cylinder.
Figure 3 shows, in horizontal section, the exhaust chamber or silencer.
In these figures, like letters of reference indicate corresponding parts.
As will be seen from the drawings, our improved motor comprises a cylinder a
consisting of a simple weldless steel tube, screw-threaded at its two ends. One of
the ends of this tube is screwed into the crank-casing or chamber b; into the other
end is screwed a cylinder cover c. To facilitate this the end or cover of the
cylinder is provided on its outer side with a hexagonal projection d cast thereon
which can be easily acted upon by means of a suitable key or spanner for
introducing or removing the said cover. Into the cover of the cylinder is also
screwed the electric igniting device e.
In the interior of the cylinder, can move a piston f provided with packing-
rings g. In the bottom of the piston is fixed, by the aid of two nuts h, a rod i of
which one end forms a bearing for the head of the connecting-rod j, the axis of
which is the pin k; on the other end is fixed a thin plate having an external
diameter equal to the internal diameter of the cylinder and serving to carry with
it, during the driving stroke of the piston, the movable and independent segment
or hollow cylindrical piece m.
At a suitable point in the travel of the piston (that is to say, at about the middle
of its travel) are formed two screw-threaded holes and o in the cylinder. In
the hole n which serves for the exhaust of the burnt gases, is screwed an exhaust-
chamber p, provided with a spring-valve 9 and exhaust orifices p³, p¹.
The piston is shown in the position which it occupies after having passed
over a little more than half of its travel, completely uncovering the exhaust-
aperture and at the moment when it is about to commence to uncover the orifice
for the admission of the explosive mixture supplied by the carburettor r.
The said carburettor, which is also screwed into the hole o in the cylinder, consists
of a very thin discs of a diameter a little less than that of the carburettor
-

page_text: .
The
chamber. On this disc s is fixed a central rod provided at its other end t with a return
spring which enables the disc s to close the passage through the gas or petroleum
tube u.
The travel of the disc s is limited by the aid of a screw-threaded cap v.
The air which is to be mixed with the gas or petroleum vapours to form the
explosive mixture, enters the carburettor-chamber through the orifices a.
partial vacuum produced by the suction of the motor causes the disc valve s to
open, to a degree which can be easily regulated by the aid of the screw-cap v..
The very simple operation of our motor can now be very easily explained. In
the first phase, which we will suppose to be the driving phase, the piston, driven
forward by the explosion of the mixture ignited by the electric igniting-device e,
soon passes the orifice of the exhaust chamber. The burnt gases raise the valve q
and partially escape until they are very nearly in equilibrium, in pressure, with
the atmosphere. From this moment, the piston, in continuing its travel, uncovers
the suction-orifice "o and produces a partial vacuum which allows the disc valve s
to open the inlet-orifice for the gas or petroleum which is to mix with the air
entering at to form the explosive mixture. The drawing-in of this mixture
continues until the piston reaches the end of its travel and the plate has
brought the movable segment m into the position m' m' which corresponds to the
closing of the two orifices o, n for admission and exhaust. The admission.or
drawing-in phase immediately succeeds the explosion phase.
The last phase of the cycle is the phase of compression of the body of gas
comprising the new (explosive) gases and part of the burnt gases from the previous
explosion. This last phase takes place during the return stroke of the piston.
The piston having reached the forward end of its travel, the movable segment m
is then in the position m'm' which enables it to simultaneously close
the two orifices o and n for admission and exhaust. In returning, the piston leaves
the segment m in this same position m¹ m³ until the moment when the rear end of
the piston engages the segment m, and carries the said segment with it, at the
same time, compressing the fresh mixture until it reaches the end of its travel,
without allowing any part of the said mixture to escape through the orifices o
and n. Finally, in the last part of the return stroke of the piston, it will be seen
that the mixture cannot escape by any valve or exhaust orifice since these are closed
by the piston itself. The advantage here obtained is that one is enabled to ensure
that the mixture shall always be compressed to the same degree and consequently
obtain regular working of the motor.
The very light connecting-rod j is formed by a weldless steel tube of diameter
and thickness in proportion to the forces to be transmitted thereby. The heads of
the connecting-rods ; and y are very light and are simply cottered and brazed.
The motor is provided with two twin fly-wheels z, z keyed on the motor-shaft 1
which is made in two parts, these fly-wheels moving in the chamber 6 forming the
exhaust-chamber or silencer.
The crank-pin 3 serving to transmit the driving power to the shaft through
the crank fly-wheels, instead of being fixed to the latter, as is done usually, can,
on the contrary, turn in the arms of the fly-wheels.
The products of combustion pass, by way of the exhaust orifices p' in the
exhaust-chamber p, through a pipe (not shown in the drawings) or in any other
convenient manner, into the fly-wheel chamber b forming a silencer, and pass away
through a valve 4 which provides for the automatic regulation of the speed of the
motor. This valve is provided with apertures 5 formed in its piston and with
apertures 6 formed in its cylinder as well as with an air-cock 7 for regulation.
The forms, details, accessories, materials and dimensions of our improved
motor can obviously be varied without in any way departing from the nature of
our invention.
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
The improved motor with three-period cycle, comprising a movable and inde-

page_text: pendent segment controlled by the piston itself and replacing the admission and
exhaust valves of ordinary four-period cycle motors, the whole constructed,
arranged and combined substantially as hereinbefore described.
Dated the 17th day of January 1899
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.