Improvements in Steam, Gas, Petroleum, Acetylene, or the like Rotary Motors for Motor Carriages and for other Uses.
Year: 1898

page_text: Date of Application (in United Kingdom), 2nd Mar., 1898
Complete Specification Left, 14th Nov., 1898-Accepted, 14th Jan., 1899
Improvements in Steam, Gas, Petroleum, Acetylene, or the like Rotary
Motors for Motor Carriages and for other Uses.
I, ANDRÉ BONNARD DE BOUVAND, of 19, Rue de Provence, Paris, France,
Employé, do hereby declare the nature of this invention to be as follows:-
This invention refers to a motor which may be driven by steam, gas, petro-
leum, acetylene, or the like, and is especially adapted for use for motor carriages,
the action of the motor being based on the following mechanical motion.
Supposing two shafts to be mounted in bearings making between them an
angle of 150°. I will term these shafts for clearness of description A & B
respectively.
The shaft B terminates in a fork carrying a transverse axle, upon which is
jointed a rod (in continuation as it were of the shaft B), and the opposite end
of this rod takes into and is carried by a crank on the end of the shaft A. If
the crank is revolved it carries with it the jointed rod, the centre line of which
is thus caused to describe a cone, the base (that is the crank end of the rod)
being the plan of the crank and the top of the cone, the centre of the fork of the
shaft B. With such an arrangement there is obtained a relation in speed of
one to two, that is to say if I make the shaft A turn once, the shaft B will only
make half a revolution.
Now in carrying my invention into practice in the form of a motor, I substitute
a dise at the jointed end of the rod aforesaid, that is where the rod is jointed
to the fork, and instead of the fork (at the end of the shaft B) I substitute on the
end of the said shaft a spherical segment, the whole of this mechanism being
enclosed in a spherical casing, and I thereby form within the spherical casing,
and on one side of the disc therein, two chambers, which increase and diminish
alternately, when the engine is in motion, such chambers being formed one on
each side of the spherical segment aforesaid. Steam or other fluid or gas
admitted and exhausted alternately from each chamber, whereby the engine is
maintained in motion.
is
When in one position with the crank of the shaft A over to one side, chamber
No. 1 is closed, by the flat side of the spherical segment coming against or near
to the face of the disc, and the chamber No. 2 is at its greatest size. Steam or
equivalent is then admitted by any convenient mechanical devices, to the chamber

page_text: No. 1 while the exhaust passage of chamber No. 2 is thrown open, and the pressure
fluid or gas acting between the flat side of the spherical segment and the face
of the disc, the latter is moved on one side relatively to the segment and the
movement of the disc turns the crank of shaft A, a quarter of a turn, and the
chamber No. 2 is caused to diminish in capacity and the steam or pressure gas
or fluid escapes therefrom. When the shaft A has thus been turned half a revolu-
tion, the shaft B carrying the segment will only have made a quarter revolution.
When the motor shaft A has made three quarters of a revolution (the exhaust
passage still being open in the chamber No. 2) the steam or gas can be allowed
to act in chamber No. 1 by expansion only if so desired, the motion continuing
until the cycle of motions is complete, when it is again reciprocated and so on.
The motor can be made to operate by steam or pressure water, but it is
especially intended to be driven by gas, petroleum acetylene or alcohol, the usual
cycle of operations common to such engines being able to be arranged as easily
as with ordinary motors, and the compression chambers in this construction of
motor can be conveniently formed by recesses in the acting face of the disc.
Improvements in Steam, Gas, Petroleum, Acetylene, or the like Rotary
Motors for Motor Carriages and for other Uses.
I, ANDRE BONNARD DE BOU VAND, of 19, Rue de Provence, Paris, France,
Employé, 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 refers to a motor which may be driven by steam, gas, petro-
leum, acetylene or the like, and is especially adapted for use for motor carriages,
and it may be used to drive boats, for the direct driving of dynamos, and for
other uses, the action of the motor being based on the following mechanical
motion, as shewn by the diagram view at Fig. 1 of the accompanying drawings.
Supposing two shafts to be mounted in bearings making between their axes
an angle of say 150°, these shafts for clearness of description, being lettered A
and B respectively.
The shaft B terminates in a fork C carrying a transverse axle, D upon which
is jointed a rod 1)¹ (in continuation, as it were, of the shaft B) and the opposite
end of this rod D¹, takes into, and is carried by, a crank E on the end of the
shaft A.
If the crank E is revolved, it carries with it the jointed rod D', the centre line
of which is thus caused to describe a cone, the base of the cone being the plan
of the crank, and the apex of the cone, the centre of the fork C of the shaft B.
With such an arrangement there is obtained a relation in speed of one to two,
that is to say, if I make the shaft A turn once, the shaft B will only make half
a revolution.
In order that the system opdrates as has been above stated, it is necessary that
the centre of the axis B, passing through the centre of the fork C, should coincide
with the centre of the rod D', in the position indicated by the Fig. 1; without
this the axis D' would only have an oscillating movement.

page_text: Now in carrying my invention into practice, in the form of a motor, and as
shewn by the diagram views Figs. 2 to 6 hereafter referred to, I form a disc D
at the jointed end of the rod D₁ aforesaid, (that is where the rod D¹ is jointed to
the fork C), and instead of the fork C (at the end of the shaft B) I substitute
on the end of the said shaft B, a spherical segment C¹, the whole of this mechan-
ism being enclosed in a spherical casing, and I thereby form within the spherical
casing, and on one side of the disc therein, two chambers numbered 1 and 2,
which increase and diminish alternately as shewn by Figs. 2, 3, 4, and 5, when
the engine is in motion, such chambers being formed one on each side of the
spherical segment C₁ aforesaid. Steam or other fluid or gas, is admitted and
exhausted alternately from each chamber, by suitable or well known means, not
shewn on the drawing, whereby the engine is maintained in motion.
Fig. 6 is a diagram shewing successive positions, (during a revolution of the
motor shaft) of the end of the rod D', which has a bearing in the crank E. The
hinge joint between the segment C¹ is shewn by dotted lines at Figs. 2, 3 and 5,
the Figs. 2, 3, 4 and 5, representing the positions of the disc D and of the
crank E during an entire revolution.
The positions shewn at Figs. 2 and 4, which are views in sectional elevation,
correspond to the positions marked 1 and 3 respectively, in the diagram Fig. 6,
and the positions shewn at Figs. 3 and 5 (which are views in sectional plan)
correspond respectively to the positions marked 2 and 4 of Fig. 6.
In the first phase at Fig. 2 the crank is at a dead point, the chamber 1 is
closed, and the chamber 2 is at its greatest expansion 120°; steam entering
into the chamber 1 by any suitable mechanical arrangement, throws on one side
the disc D, in relation to the spherical segment C¹, (the chambers being supposed
to be steam or gas-tight, which in practise can be readily effected, being given
the large rubbing surface) and turns the crank a quarter of a turn to the position
shewn at Fig. 3, which corresponds with position 2 of Fig. 6 while the chamber 2
is diminishing in volume; that steam which has been detained therein during
the previous action is then allowed to escape; at Fig. 4 the chambers 1 and 2 are
at the position No. 3 of Fig. 6, corresponding to the half of a revolution of the
motor shaft A, whilst the segment C has only made a quarter of a revolution.
At phase 4 shewn at Fig. 5 which is equivalent to the position 4 of Fig. 6,
the motor shaft A has made three quarters of a turn, the exhaust continues in the
chamber 2, whilst the expansion can commence, if it is desired at this period, in
the chamber 1, and the rotation continuing the system arrives at the point,
phase 1 shewn at Fig. 2, position 1 of Fig. 6, when cycle of motions is again
repeated and so on.
The motor can be made to operate by steam or water under pressure, but it is
especially intended to be driven by gas, petroleum, acetylene, or alcohol, the
usual cycle of operations common to such engines being able to be arranged, as
easily as with ordinary motors, and when employed as an explosive motor the
compression chamber in this construction of motor, can be conveniently formed
by recesses in the acting face of the disc, as is shewn by the diagram face and
sectional view Figs. 7.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what
I claim is:-
1. A rotary motor, comprising or consisting of a spherical casing, a spherical
segment C¹ located and turning in the casing the spherical segment being
provided with a shaft or trunnion B and being connected by means of a joint
to a disc D, the latter being fitted with a rod D¹, the end of the rod D' taking
into the end of a crank E fixed to the motor shaft A which shaft is thereby
rotated, the said shaft A being arranged at a certain angle with the shaft B;
the motor being able to be driven either by steam or by the explosion of a gas
in such manner that the motive fluid operates by causing the space between the

page_text: disc D and the segment C to first expand and afterwards to contract as
the fluid escapes and causes the revolution of the whole of the mechanism in the
casing, the motor shaft A making two turns, as well as the crank E, whilst the
segment and the disc D only make one turn, all substantially as described and
illustrated with reference to the accompanying drawings.
2. The general arrangement and combination of parts composing my improved
motor all constructed and acting substantially as and for the purpose, described
with reference to the accompanying drawings.
Dated this 14th day of November 1898
BREWER & SON,.
London and Leeds. Agents for the Applicant.