New or Improved Rotary Motor.
Year: 1897

page_text: New or Improved Rotary Motor.
1, LÉON CORDONNIER, of 104, Rue Boucher de Perthes, Lille, Merchant, do hereby
declare the nature of this invention to be as follows:-
The object of the present invention is a gas or petroleum rotary motor, avoiding
the use of the alternative rectilineal movement and substituting it by a uniform cir-
cular movement suppressing also the trepidations, the cylinders being bound together
by a hoop and forming the fly-weight of the motor.
This is composed of four or more cylinders arranged two by two according to the
same diameter, in the same plane, around a circular crown cast to the cylinders,
which are kept together by a hoop.
These cylinders are open towards to the center of the system, and the whole arrange-
ment thus formed is movable around a fixed shaft serving as a support and upon
which is wedged an eccentric supplied with a collar. In each cylinder a piston works,
joined to the collar by a crank.
At the upper part of each cylinder an electric candle is fixed, supplied with two
platinum wires between which spirts the electric spark. The cylinders, in turning,
draw the piston-rods, cranks and eccentric collar; the piston-rods being bound to
the eccentric-ring by cranks of the same length, turn around the eccentric as a centre.
Thus, we obtain two rotary movements, with a difference of radii equal to the half of
the piston stroke, also the complete suppression of the alternative movements.
The admission and escape of gas take place by the following conduits the gas
arrives at one of the faces of the motor by a central box, is distributed in the cylin-
ders by a longitudinal conduit cast to the latter, and at the extremity of which is the
admission valve. The escape valve is about the middle of the cylinder. A longi-
tudinal conduit cast to the cylinders, symmetrical with the first, leads the escape
gas to a second central box situated at the opposite side of the first.
The force of expansion produced by the explosion is divided into two components:
the first, directed according to the axis of the crank is neutralized by the fixed eccen-
tric: the other which is normal with the axis of each cylinder, forces it to turn
around the fixed eccentric.
In the rotary movement of the motor supposing an explosion has just taken place
in a cylinder, the piston is dispelled from the end of its cylinder at a certain
moment, the escape orifice situated at the end of the cylinder is open and allows a
part of the burned gas to escape; then a depression is produced which enables the
admission valve to open and to admit a certain quantity of fresh gas. The admission
valves and escape valves are worked automatically by spiral springs.
In the second semi revolution of the motor (what we have just described as having
taken place in the first semi-revolution), each piston approaches the end of the
cylinder and expulses the burnt gas remaining in the cylinder.

page_text: From this moment the compression recommences until the moment when the
piston arrives at the end of its course: the spark will again light the exploding
mixture.
L. DUVINAGE,
Agent for Applicant.
I, LÉON CORDONNIER, of No. 104, Rue Boucher de Perthes, Lille, France, Merchant,
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 state-
ment:
The present invention relates to a rotary gas or petroleum motor which avoids the
rectilinear alternative motion usually employed, replacing it by an uniform circular
movement, thus suppressing vibration.
It consists of a number of cylinders grouped radially round a central shaft, said
shaft and cylinders all revolving together thus constituting a fly wheel. The whole
of the cylinders may be enclosed in a suitable casing.
I will now describe my invention with reference to the accompanying drawings in
which:
Fig. 1 shows a vertical sectional elevation, and Fig. 2 a transverse sectional eleva-
tion of the motor.
The motor consists of four or any other preferred number of cylinders, A, A1, A2, A3,
arranged radially at the same distance and in the same plane around a central and
preferably circular casing B formed integrally with the cylinders. The cylinders thus
grouped are free to move round with the central shaft C attached to the casing B,
said shaft revolving in suitable bearings.
On the shaft C is firmly mounted an eccentric sheave D with the usual strap E.
Each cylinder is provided with a piston F attached to the eccentric strap E by a
link or connecting rod G and its outer end is also provided with an electric igniter J
fitted with two platinum wires between which the spark is produced.
It follows therefore that two movements of rotation are obtained, one being
eccentric to the other by half the stroke of the pistons, and a complete suppression of
alternative motion is also obtained.
The gas is admitted automatically to the cylinders without the employment of
cams or cogwheels by the following arrangement of parts:
The gas enters at about the centre of one side of the motor as indicated by the
arrow Fig. 2, and passes through the central chamber M and is distributed to
the cylinders by a longitudinal pipe N formed integrally with the casing B and the
cylinders, the outer end of each cylinder being provided with an admission valve R
under the control of a spring r.
The exhaust valve S closed by a cover ¹ is disposed towards the middle and at the
side of each of the cylinders A, A1, A2, A³. A longitudinal pipe P formed integrally
with the cylinders and casing B and parallel with the pipe N leads the products of
combustion to a second central chamber Q situated on the opposite side of the motor
to that on which the chamber M is arranged. The gas, which is exploded by the
igniter J, not being able to drive the piston before it forces the cylinder to revolve
with the shaft C.
The cylinder obeys that portion of the force which is directed according to its axis,
whilst that portion of the force, which is directed according to the axis of the link, is
neutralised by the resistance of the fixed eccentric attached to the shaft C.

page_text: The operation of the motor as regards one cylinder is as follows:-
Supposing cylinder A to be in its first position, the disposition of the parts are as
follows.
Gas charge in compression in cylinder A, ready to be exploded.
The exhaust valve S is open in cylinder A¹, piston moving inwards.
Charge of gas
drawn into cylinder A². Piston at end of inward stroke.
Piston moving outwards and gas charge partly in compression is cylinder A³, the
exhaust valve open for remaining portion of products of combustion.
When the charge is exploded in cylinder A, it moves into its second position (piston
moving inwards) in which the exhaust valve opening is uncovered, when a portion of
the products of combustion may escape.
The cylinder A continues to move until it reaches its third position, when the
piston reaches the end of its inward movement and draws in a full charge of gas
through the inlet valve R. The cylinder A still moving reaches its fourth position,
in which the piston has moved outwards, thereby expelling the remaining portion of
the products of combustion and partly compressing the new charge of gas drawn in
previously. When the cylinder A reaches its first position again, the gas charge is
fully compressed, ready to be exploded.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I'
claim is :-
(1) A rotary gas or petroleum motor characterised by its having four or more
cylinders joined by a casing or chamber, in which cylinders the pistons F travel, same
being joined by links of equal length to the strap E of an eccentric D attached to the
shaft which supports the entire motor. The expansive force of the gases, produced
by explosion behind the pistons divides itself into two parts, the one following the
direction of the links and neutralised by the fixed eccentric, and the other conform-
ably with the axis of each cylinder, and forcing said cylinders to rotate round the
eccentric as a centre, the inlet and exhaust being obtained automatically as described
and the ignition being obtained by the electric spark or any other known means.
The casing which is formed integrally with the cylinders, so that when they
revolve, the whole group forms the fly wheel of the motor; substantially as herein
described and set forth.
Dated this 3rd day of June 1898
S. S. BROMHEAD,
Agent for the Applicant, 171, Queen Victoria Street, E.C.