IMPROVEMENTS IN OBTAINING MOTIVE POWER
Year: 1845

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MATHIEU
FRANCOIS ISOARD, of Paris, in the Kingdom of France, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-eighth day of August, in the ninth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Mathieu Francois Isoard, my exors, adiñiors, and assigns, Her especial licence,
full power, sole privilege and authority, that, I, the said Mathieu Francois
Isoard, my exors, admors, and assigns, or such others as I, the said Mathieu
Francois Iscard, my exors, adññors, or assigns, should at any
assigns, should at any time agree with,
and no others, from time to time and at all times during the term of years
therein expressed, should and lawfully might make, use, exercise, and vend,
within England, Wales, and the Town of Berwick-upon-Tweed, and in the
Islands of Guernsey, Jersey, Alderney, Sark, and Man, and also in all Her said
Majesty's Colonies and Plantations abroad, my Invention of "IMPROVEMENTS IN
OBTAINING MOTIVE POWER;" in which said Letters Patent is contained a proviso
that I, the said Mathieu Francois Isoard, shall cause a particular description
of the nature of my said Invention, and in what manner the same is to be
performed, to be inrolled in Her said Majesty's High Court of Chancery within
six calendar months next and immediately after the date of the said in part
recited Letters Patent, as in and by the same, reference being thereunto had,
will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Mathieu Francois Isoard, do hereby declare that the nature of my said Inven-
tion, and the manner in which the same is to be performed, are fully described
and ascertained in and by the following statement thereof, reference being had
to the Drawing hereunto annexed, and to the figures and letters marked
thereon, that is to say:-

page_text: The nature of the Invention consists in combining an arrangement of tubes
through which water or other fluid flows for steam or vapour to be generated
therefrom. These tubes are arranged within the fire place, by which means the
Leat from the fire is communicated to the tubes and produces a rapid circulation
to the liquid contained therein, which passing out at the other end in a state of
steam or vapour, draws rapidly round the tubes and apparatus, by which power
is obtained, as will be more particularly described. The water or other fluid
enters at one end of these tubes and passes out at an outlet in the opposite
end of it in a state of vapour. This tube acts in a threefold capacity as a
boiler, fly-wheel, and a ventilator, and by this arrangement the fluid from
whence the steam or vapour is obtained is drawn into the tubes, and at the
same time the requisite air for supporting the combustion of the fuel is drawn
in, by which the employment of a chimney to obtain the necessary draft is
dispensed with; the tubular ring may be made of copper, iron, or any suitable
material, and the form may be varied, either of a single tube, forming a ring,
or of a series of tubes arranged spirally; but where several tubes are employed
sufficient space must be left between to allow of the fire to operate upon all
the surfaces of them. When several tubes are employed, each should have a
separate opening for the admission of fluid from whence the steam is to be
obtained, and also a separate outlet or discharge pipe, placed at a tangent to
the circumference of the last turn of the spiral. The steam generated in these
tubes is kept at a high temperature, and before it escapes at the outlet the
temperature is much increased, which allows of its acting as steam and as
dilated gas.
The fireplace is formed by the arrangement of the tubes
amongst themselves to act as fire bars, upon which the materials for combus-
tion are placed, and by the centrifugal force obtained by the rotary motion of
the apparatus, distributes the fuel and causes it to be confined to the sides. To
facilitate this a perforated metal plate is placed at the centre of the lower part
of the fireplace; but in order that the Invention may be more fully understood,
I will proceed to describe the Drawing hereunto annexed.
DESCRIPTION OF THE DRAWING.
Figure 1 is a vertical section of the apparatus for obtaining power,
Figure 2 is a plan of the same apparatus. A is a tubular ring, shown in this
arrangement of a spiral form, composed of two tubes which embrace one
another; they are connected to the centre nave by the arms B. The number of
these arms may be varied; two are hollow, one end of which communicates to
the tubular ring and the other to the nave C; through this nave C passes a
hollow shaft D, the bearings of which are supported by framing D¹.. To the

page_text: lower part of the shaft is affixed a tube F, which is attached to the pump G';
this pump, through the tube H, is capable of supplying the liquid or material
required to the hollow shaft D and to the tubular ring A, by means of the
arms B, or this ring may be supplied by any other convenient method. The
tubes of the ring connected to the casing I, into which the fuel is placed, the
lower part of the fireplace, is hollowed out, into which air is drawn through
the openings J; the tubes J¹are for the same purpose, and are shown at
Fig. 8; they are connected to the fireplace I in the space of the hollowed part
around the axis D, and are to be used in place of the opening J. The case or
fire place I is constructed of two pieces, connected together by means of bolts;
between the two parts a small space is left to allow the ashes to fall through
into the ash pit K; the upper part of this casing I is open for the fuel to be
supplied, which falls over the guard plate M, and from thence to the sides of
the fireplace. To the hollow shaft D is attached a pinion N, which takes into and
gives motion to a wheel O placed upon the shaft P, through which the power is
to be communicated as may be desired. On this shaft P is an excentric wheel Q
the working of which gives the necessary movement to the piston R of the
pump G, to which it is connected as shown in the Drawing. The tubular ring A,
being composed of the tubes spirally arranged, has two openings for the
introduction of the liquid into the hollow arms B, and also two outlets S, placed
at a tangent to the last upper turn of the tube; but when the tubular ring is
only formed of one tube there will only be one opening for the introduction
of the liquid into the arms B, and only one outlet S. This arrangement is
shown in the Drawing at Figures 3, 4, and 5. In Figure 3 the tube is in the
form of a ring, in Figure 4 it is turned spirally, and Figure 5 shows a plan for both
these, in which is shown the one opening into the arm B and one outled S imme-
diately opposite to each other. Figures 6 and 7 shew the elevation and plan of
these tubes, interlaced one with the other, and which together form the tubular
ring A, in which it will be seen that there are three openings for the introduction
of the liquid and three outlets for the discharge of the steam, so that whatever the
number of tubes may be which, for the tubular ring boilers, each should have an
opening for the admission of the fluid to be vapourised, and also for the escape
of the vapour. In applying this system of obtaining power for the purpose of
driving locomotive engines on land, or for propelling vessels on the water,
when the motion or action of the engine has to be reversed, I employ the
following plan:-Figure 9 shows an arrangement by which this effect is pro-
duced. The outlet S' is furnished with a cock a¹, which, by being turned in
one direction or the other, shuts off the steam from passing, and, according to
one opening or the other through which the steam passes out, so will be the

page_text: way in which the rotary movement will take place, except in the direction
required; the number of the tubes, forming the tubular ring, that are employed,
and the size of the casing, will depend upon the force required. The mode
in which the apparatus works is as follows:-The combustible materials
being thrown into the fireplace and lighted, a communication is opened
between the reservoir containing the liquid and the tubular ring A, and the
fluid flowing therein becomes quickly vaporised, which produces a circulation
in the tubes, and which draws the tube and the apparatus round with great
rapidity, and communicates also its rotary movement to the fireplace, and to
the hollow shaft D, the movement of which is transmitted to the shaft P by
means of the pinion N and the wheel O.
The peculiar character of this Invention consists,―
First, in the arrangement of a tubular ring of any required size, either con-
sisting of one or more tubes, through which passes water or other fluid to be
vaporised, working as a boiler and ventilator, being connected to the fireplace
with which it turns.
Second, in the arranging in the fireplace, supplied with any suitable fuel,
the tubes through which the fluid to be vaporised passes through in such man-
ner as to produce the rotation of the tubular ring, and consequently the hollow
axis to which it is affixed, by which a power is obtained that may be applied
direct, or in any suitable manner.
Third, in the mode of drawing in the air to supply the combustion during
the rotation of the tubular ring, by which the necessity of a chimney is
avoided; this new mode of obtaining power may be employed in all places
where the steam engine is now employed.
In witness whereof, I, the said Mathieu François Isoard, have hereunto
set my hand and seal, this Twentienth day of February, in the year of
our Lord One thousand eight hundred and forty-six.
MATHIEU FRANCOIS (L.S.) ISOARD.
Taken and acknowledged by Mattieu
Francois Isoard (party hereto), at
Paris, in the Kingdom of France,
this Twentieth day of February, 1846,

page_text: A.
This is the Specification referred to in the Affidavit of William Henry
Ritchie, sworn before me this 26th day of February, 1846.
N. W. SENIOR.
William Henry Ritchie, of Old Square, Lincoln's Inn, in the County of
Middlesex, Gentleman, maketh oath and saith, that he is acquainted with the
manner and character of the handwriting of Thomas Pickford, Her Britannic
Majesty's Consul at Paris, in the Kingdom of France; and this deponent
further saith that the signature "Thomas Pickford," set, subscribed, and
written in the margin of the Specification hereunto annexed, marked A., and
dated the Twentieth day of February instant, and purporting to be executed
by Mathieu Francois Isoard, of Paris aforesaid, whereby it is stated that the
said Specification was acknowledged by him, the said Mathieu Francois Isoard,
before the said Thomas Pickford, on the said Twentieth day of February, at
Paris aforesaid, is of the proper handwriting of the said Thomas Pickford.