IMPROVEMENTS IN OBTAINING MOTIVE POWER FROM STEAM AND OTHER FLUIDS, AND IN PUMPING AND FORCING WATER AND OTHER FLUIDS
Year: 1856

page_text: LETTERS PATENT to Claude Antoine Arnaud, of Lyons, in the Empire
of France, Manager of the Company called "La Rotative," for the
Invention of "IMPROVEMENTS IN OBTAINING MOTIVE POWER FROM STEAM AND
OTHER FLUIDS, AND IN PUMPING AND FORCING WATER AND OTHER FLUIDS."-
A communication.
Sealed the 25th July 1856, and dated the 26th April 1856.
PROVISIONAL SPECIFICATION left by the said Claude Antoine Arnaud
at the Office of the Commissioners of Patents, with his Petition, on
the 26th April 1856.
I, CLAUDE ANTOINE ARNAUD, of Lyons, in the Empire of France, Manager
of the Company called "La Rotative," do hereby declare the nature of the
Invention for "IMPROVEMENTS IN OBTAINING MOTIVE POWER FROM STEAM AND
OTHER FLUIDS, AND IN PUMPING AND FORCING WATER AND OTHER FLUIDS," to be as
follows:-
This Invention consists in obtaining a power by steam and other fluids, and
in pumping and forcing water and other fluids, by the use of an apparatus
consisting in two cylinders joining together by means of teeth formed on their
surface; these cylinders have each two teeth opposed one to the other, which
are of much greater dimensions than the other teeth. Those two cylinders
are enclosed in a case formed by portions of two cylinders concentric with the

page_text: cylinders above mentioned. At the two points of meeting between the portions
of cylinders which form the case, pipes are introduced, one for the entrance and
the other to let out the steam or other fluids. The great teeth on the cylinders
are provided with an appendage in metal, which is pressed forward by springs
of any description, so as to enclose the fluid when the teeth come in contact,
The
or when one or the other comes in contact with the interior of the case.
small teeth at the bottom of the depth have also each a metallic packing,
adapted and pressed up by springs of any description; this packing serves to
render the fluid enclosed when the teeth of one of the cylinders comes into
the axis of the other cylinder. The case is divided into two compartments.
By the working of the cylinders in one of the compartments, the pipe for
entrance is adaped, and the rotation of the cylinders encreasing the capacity
of that compartment, the cylinders revolve when the engine is worked with
expansion. After a partial revolution, the steam is cut by a sliding valve, or
otherwise, then the expansion begins and continues until the teeth have reached
the exit tube; then the compartment decreases in capacity by the rotation of
whilst
the cylinders, and drives the steam or other fluid through the exit tube;
this takes place, the entrance pipe is opened to another compartment of a
similar description. The steam or fluid is prevented from passing from one to
the other compartment at the end of the cylinders by moveable plates or
crowns pressed by springs of suitable description. The condensation of the
steam is effected in the usual manner, and the air pump serving to maintain
the condensation evacuated is of a description similar to the engine.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Claude Antoine Arnaud in the Great Seal Patent Office 2
on the 22nd October 1856:
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CLAUDE
ANTOINE ARNAUD, of Lyons, in the Empire of France, Manager of the
Company called "La Rotative," send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters 3
Patent, bearing date the Twenty-sixth day of April, in the year of our Lord
One thousand eight hundred and fifty-six, in the nineteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Claude Antoine Arnaud, Her special licence that I, the said Claude Antoine
Arnaud, my executors, administrators, and assigns, or such others as I, the
said Claude Antoine Arnaud, my executors, administrators, and assigns, should

page_text: at any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might make,.
use, exercise, and vend,, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "IMPROVE-
MENTS IN OBTAINING MOTIVE POWER FROM STEAM AND OTHER FLUIDS, AND IN
PUMPING AND FORCING WATER AND OTHER FLUIDS," (a communication,) upon the
condition (amongst others) that I, the said Claude Antoine Arnaud, my ex-
ecutors or administrators, by an instrument in writing under my, or their, or one
of their hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Claude Antoine Arnaud, do hereby
declare the nature of the said Invention, and in what manner the same is,
to be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say:-
This Invention consists in obtaining a power by steam and other fluids, and
in pumping and forcing water and other fluids by the use of an apparatus
consisting in two cylinders joining together by means of teeth formed on their
surface. These cylinders have each two teeth opposed one to the other, which
are of a much greater dimension than the other teeth. These two cylinders
are enclosed in a case formed by portions of two cylinders concentric with the
cylinders above mentioned. At the two points of meeting between the portions
of cylinders which form the case, pipes are introduced, one for the entrance
and the other to let out the steam or other fluids. The great teeth on the
cylinders are provided with an appendage in metal, which is pressed forward
by springs of any description, so as to enclose the fluid when the teeth come
in contact, or when one or the other comes in contact with the interior of the
case. The small teeth at the bottom of the depth have also each a metallic
packing, adapted and pressed up by springs of any description; this packing
serves to render the fluid enclosed when the tooth of one of the cylinders
comes into the axis of the other cylinder. The case is divided into two
compartments. By the working of the cylinders in one of the compart-
ments, the pipe for entrance is adapted, and the rotation of the cylinders
increasing the capacity of that compartment, the cylinders revolve when tho
engine is worked with expansion. After a partial revolution, the steam is cut
by a sliding valve, or otherwise, then the expansion begins and continues until
the teeth have reached the exit tube; then the compartment decreases in

page_text: passage d', which leads to the opening in the case c, and the steam then
escapes from the case by the opening c', and passes to a condenser e¹.
valve which is closed when the engine is working forwards, but which opens
when the engine is reversed. There is another similar valve at m¹ in connection
with the condenser e³.
I would remark that although I have described the Invention as applied to
a steam engine, it will be easily understood that by slightly modifying the
details it may be applied in obtaining power from other fluids, and also for
pumping and forcing water and other fluids.
In witness whereof, I, the said Claude Antoine Arnaud, have hereunto
set my hand and seal, this Eighteenth day of October, in the year of
our Lord One thousand eight hundred and fifty-six.
Witness,
5
I, undersigned, certify that the signature
C. A. ARNAUD. (L.B.)
of C. A. Arnaud was written in my presence,
Lyons, October the 18th 1856,
ROBERT WADDINGTON.