Improvements in Steam Engines.
Year: 1890

page_text: Date of Application, 26th Sept., 1890
Complete Specification Left, 20th June, 1891-Accepted, 1st Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Engines.
-
I, JOSEPH PIERRE COT of 134 Avenue d'Italie, Paris, in the Republic of
France, Grocer do hereby declare the nature of this invention to be as follows
The present invention relates to that class of steam engines consisting of a
boiler or generator and the motor properly so called.
The application of my invention will be preferably suitable for small businesses
or for driving dynamos used for electric lighting for tricycles and for boats etc.
It will be seen by reference to the accompanying drawings that the boiler or
generator is composed of a chamber or receiver a preferably spherical and with a
double case, above which is placed a coiled tube & formed of several concentric
tubes or divided into a certain number of partitions so as to considerably augment
the heating surface.
The spherical or cylindrical chamber or receiver which is placed above the
furnace c receives the feed water direct by means of a pipe d leading from the
pump e.
This water which is always supplied in very small quantities is turned instantly
into steam at each stroke of the piston. The deposits of tartar are made in the
chamber or receiver and the dry steam alone rises in the coiled tube so that it is
never obstructed.
The steam leaving the coiled tube is led by a pipe finto the rotary engine a so
that it acts in a stream upon a double piston keyed upon the driving shaft i
and having concave surfaces upon both sides. This stream acts alternately upon
the pistons revolving in the cylinder in order to describe a spiral and finally.
escapes near the centre by an orifice j arranged for this purpose in one of the
cylinder covers. This engine can work in either direction; it only being necessary
to change the direction of the steam inlet by means of the tubes and taps as
represented in the drawing. In any case the engine will always work at a great
speed as the steam acting in a very limited space is greatly compressed.
The steam may be produced without preference by any known fuel by the
employment of a suitable furnace.
This engine is regulated by an air tap k placed upon the pump and worked by
a centrifugal governor which will open the tap more or less so that air entering
partly in place of water into the regulator will vary the production of steam.
The engine is also stopped by means of this tap for which purpose the tap is
opened considerably to put the pump out of action.
The pump is worked by a band land a pulley m keyed upon the shaft i of the
engine which traverses the cylinder and which carries on the other end the fly
wheel for transmitting the power.
The coiled tube and the chamber or receiver are made so that they can easily
be taken to pieces and may be made of any material and of any dimensions.
A little tap is placed in the lower part of the cylinder to blow off the condensed
steam.
As the pressure will always be very great in the cylinder the ends will be
provided with a certain number of ribs radiating from the centre of the circum-
ference.
The coiled tube before mentioned may consist of a single tube for low pressures
or it may be made of quite another form to that shown in the drawing.
This improved motor has the advantage that it may be placed in the very centre
of an electrical machine or of a fan or of a drying machine and generally

page_text: wherever a rapid and regular motion is necessary; thus all loss of power by
transmission is avoided.
The steam which escapes traverses two reservoirs which communicate with each
other, the first is very small and contains only a small quantity of water so that it
is almost at boiling point when the pump forces it into the steam generator, the
second reservoir is larger and serves to condense the rest of the escape steam; so
that almost all the heat is utilized.
I would have it understood that the forms materials and dimensions of the
various parts of my apparatus may be changed without departing from the peculiar
character of my invention.
Dated this wth Cont
1000
COMPLETE SPECIFICATION.
Improvements in Steam Engines.
I, JOSEPH PIERRE COT, of 134 Avenue d'Italie, Paris, in the Republic of
France, Grocer, 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, reference being had to the drawing accompanying my
Provisional Specification, which I will refer to as Figure 1, and to those accom
panying the present Specification, which I will refer to as Figure 2:-
The present invention relates to that class of steam engines consisting of a boiler
or generator and the motor, properly so called.
The application of my invention will be preferably suitable for small businesses,
or for driving dynamos used for electric lighting, for tricycles, and for boats, etc.
It will be seen by reference to Figure 1 that the boiler or generator is composed
of a chamber or receiver a, preferably spherical, and with a double case, above
which is placed a coiled tube or worm & formed of several concentric tubes, or
divided into a certain number of partitions, so as to considerably augment the
heating surface.
The spherical or cylindrical chamber or receiver, which is placed above the
furnace c, receives the feed water direct by means of a pipe d leading from the
pump e.
This water, which is always supplied in very small quantities, is turned instantly
into steam at each stroke of the piston. The deposits of tartar are made in the
chamber or receiver and the dry steam alone rises into the worm or coiled tube,
so that it is never obstructed.
The steam leaving the worm or coiled tube is led by a pipe finto the rotary
engine y, so that it acts in a stream upon a double blade or piston keyed upon
the driving shaft i and having concave surfaces upon both sides. This steam acts
alternately upon the one or the other blade or piston and, by circulating in the
cylinder, describes a spiral and finally escapes near the centre by an orifice j
arranged for this purpose in one of the cylinder covers. This engine can work in
either direction, it only being necessary to change the direction of the steam inlet
by means of the tubes and taps as represented in the said drawing. In any case
the engine will always work at a great speed as the steam, acting, in a very
limited space is greatly compressed.
The steam may be produced, without preference, by any known fuel; by the
employment of a suitable furnace.
This engine is regulated by an air tap & placed upon the pump and worked by a
centrifugal governor, which will open the tap more or less, so that air entering
partly in place of water into the generator will vary the production of steam.

page_text: The engine is also stopped by means of this tap, for which purpose the tap is
considerably opened to put the pump out of action.
The pump is worked by a band and a pulley m keyed upon the shaft i of the
engine, which traverses the cylinder, and which carries on the other end the wheel
or pulley for transmitting the power.
The worm or coiled tube, and the chamber or receiver, are made so that they
can easily be taken to pieces, and may be made of any material and of any
dimensions.
A little tap is placed in the lower part of the cylinder to blow off the condensed
steam.
As the pressure will always be very great in the cylinder, the ends will be
provided with a certain number of ribs radiating from the centre to the circum-
ference.
The worm or coiled tube before mentioned may consist of a single tube for
small powers, or it may be made of quite another form to that shown in the
drawing.
This improved motor has the advantage that it may be placed in the very centre
of an electrical machine, or of a fan, or of a drying machine, and generally
wherever a rapid and regular motion is necessary; thus all loss of power by
transmission is avoided.
The steam which escapes traverses two reservoirs, which communicate with each
other; the first is very small and contains only a small quantity of water, so that
it is almost at boiling point when the pump forces it into the steam generator; the
second reservoir is larger and serves to condense the rest of the escape steam, so
that almost all the heat is utilized.
In the modification represented at Figure 2, my system of engine, properly so
called, has the cylinder n provided with a certain number of partitions o fixed solidly
in any desired manner. These partitions divide the cylinder, in the direction of its
length, into a certain number of compartments, in which move the four bladed
wheels p, for example, all keyed upon the same shaft 7, which traverses the entire
arrangement. The steam enters by a conduit r into the first compartment, acts
upon the first blade wheel, and then enters into the second compartment by passing
through an orifices made through the division, and so on, to leave finally through
the exhaust pipe t. The inlet of the steam, its orifices of circulation, and its
exhaust, are arranged in spiral or zigzag form to ensure the proper distribution of
the steam and its work upon the blade wheels.
The number of wheels, as also that of the blades which they carry, vary
according to the dimensions of the engine and the power which it is required to
obtain. For large diameters I cast, for example, a crown which unites all the
blades in order to give them greater solidity.
The blades can be adjusted against the partitions, and against the inner side of
the cylinder, in order to permit of but little escape of steam, but I claim the right
to apply to it segments in order to prevent completely any escape of steam.
This system of engine may work by compressed air, by water, &c., by varying
the dimensions of the cylinder and of the blades, if required, and by applying
modifications of details more appropriate to the particular agent of power
employed.
I would have it understood that the forms, accessories, materials, and dimensions,
of my apparatus, may be varied without departing from the peculiar character of
my invention.
Having now particularly described and ascertained the nature of my said
nvention, and in what manner the same is to be performed, I declare that what
claim is :-
1. The steam generator composed of a jacketed spherical receiver a, surmounted
y a worm formed of several concentric tubes, or divided into a certain number
of divisions, this arrangement of generator being intended to instantaneously

page_text: vaporize a small quantity of water by the heat of the furnace c, which surrounds the
spherical receiver and the worm, substantially as herein shown and described.
2. The rotary engine g, properly so called, formed of a simple cylinder, or of
one divided into a certain number of chambers, in which is introduced a jet of
steam issuing from the generator to act upon the blade wheels, substantially as
herein shown and described.
3. The method of regulating this engine by means of an air cock k placed upon
the feed pump of the generator, this cock being worked by a centrifugal governor,
which opens it more or less to cause air, in place of water, to enter the generator
to vary the production of steam, or determine the stoppage of the engine by its
full opening, thereby sending air in lieu of water into the generator, all substantially
as. herein shown and described.
BT1001
Dated t
JOSEPH P. COT.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.