IMPROVEMENTS IN PRODUCING HEAT AND LIGHT
Year: 1857

page_text: LETTERS PATENT to Mathieu François Isoárd, of Paris, in the Empire
of France, Engineer, for the Invention of "IMPROVEMENTS IN PRODUCING
HEAT AND LIGHT."
Sealed the 20th April 1858, and dated the 2nd November 1857.
PROVISIONAL SPECIFICATION left by the said Mathieu François Isoard
at the Office of the Commissioners of Patents, with his Petition, on the
2nd November 1857.
I, MATHIEU FRANÇOIS ISOARD, of Paris, in the Empire of France, Engineer,
do hereby declare. the nature of the said Invention for "IMPROVEMENTS IN
PRODUCING HEAT AND LIGHT," to be as follows:-
My Invention relates to carburetting and burning the vapour of water, in
order to render it applicable for heating and lighting purposes. I produce the
vapour in any kind of generator, or it may be the steam as it leaves the
cylinder of steam engines. I cause this vapour or steam to traverse in a
carburetting apparatus, in which it is charged with gaseous hydrocarbon which.
it carries away.
On leaving this apparatus it is passed under the bars of a
furnace in which it serves as fuel. The vapour of hydro-carburet burns, and
the steam arising from water also burns after having been decomposed into
hydrogen and oxygen.
Instead of conducting it under a fire-grate it may be conducted into a gas,

page_text: holder, whence it can be allowed to escape at pleasure, and burnt like gas
used for lighting purposes.
I vary the preparation of the hydro-carburets to be used according to the
purpose required. For steam intended to serve as fuel, I use heavy tars of all
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Mathieu François Isoard in the Great Seal Patent Office
on the 30th April 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MATHIEu
FRANÇOIS ISOARD, of Paris, in the Empire of France, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of November, in the year of our Lord One
thousand eight hundred and fifty-seven, in the twenty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Mathieu François Isoard, Her special licence that I, the said Mathieu
François Isoard, my executors, .administrators, and assigns, or such others
as I, the said Mathieu François Isoard, my executors, administrators, and
assigns, should 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 "IMPROVEMENTS IN PRODUCING HEAT AND LIGHT," upon the con-
dition (amongst others) that I, the said Mathieu François Isoard, my executors
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 Mathieu François Isoard, do hereby
declare the nature of my said 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 Sheet of Drawings hereunto
annexed, and to the letters and figures marked thereon (that is to say):-
My Invention relates to carburetting and burning the vapour of water in
order to render it applicable for heating and lighting purposes. I produce the

page_text: vapour in any kind of generator, or it may be the steam as it leaves the
cylinder of steam engines. I cause this vapour or steam to be superheated,
and-to traverse in a carburetting apparatus, in which it is charged with gaseous
hydrocarbon, which it carries away. On leaving this apparatus it is passed
under the bars of a furnace, in which it serves as fuel. The vapour of hydro-
carburet burns, and the steam arising from water also burns after having been
decomposed into hydrogen and oxygen.
Instead of conducting it under a fire grate, it may be conducted into a gas
holder, whence it can be allowed to escape at pleasure, and burnt like gas
used for lighting purposes.
'
I vary the preparation of the hydro-carburets to be used according to the
purpose required. For steam intended to serve as fuel, I use heavy tars of
all kinds, and for gas for lighting purposes I use hydro-carburets. Thus,
the steam leaving a boiler or generator of any kind, even after it has been
used for producing the action of an apparatus, is passed through a worm,
heater, or any other suitable apparatus, in which it is superheated to a
high temperature, and then caused to enter a carburetting apparatus, repre-
sented in vertical section in the Drawing annexed; it is composed thus:-
M, L, K, J, H, compartments contiguous to each other, containing the
carbonized hydrogen or hydrogens intended to carburet the vapour; I, con-
densing compartment; a, b, c, d, e, tubes furnished with stop-cocks, and
putting all the compartments in communication with each other; f, pipe for
the feed of the vapour of water; g, exit pipe; o, p, q, cocks, one placed on
cach compartment; each compartment is besides furnished with cocks at
different heights, for the escape of the water condensed in them. (These cocks
are not shown in the Drawing.)
It will be understood that the steam entering through pipe f passes sue-
cessively into each of the compartments which it traverses, and wherein it is
charged more and more with combustible vapours. By increasing the number
of compartments, the steam is the more carburetted; if, on the contrary, the
steam should be too much carburetted, one of the tubes d, c, b, is obstructed,
and the steam is caused to leave through cocks o, p, or q.
Supposing it is desired to condense the gas, it is suitable to make the
apparatus of a strength proportionate to the compression; for this purpose it
suffices to put the recipients in communication with the passage g, and to
employ a worm, boiler, or any other generator capable of heating the steam to
a high pressure. It will be understood that the apparatus may be of any
form or size;
it may be of iron, cast or sheet iron, copper, or any other metal
possessing sufficient strength.

page_text: "
Having described the nature of my Invention, and the manner of performing
the same, I declare, that what I claim as the Invention to be secured under the
herein-before in part recited Letters Patent is, carburetting superheated steam,
effected by causing the superheated steam to traverse hydro-carburets. of any
kind; this carburetting furnishing, according to the mode of operating and the
carburets employed, gas for lighting or for heating purposes.
In witness whereof, I, the said Matheiu François Isoard, have hereunto
set my hand. and seal, this Twenty-third day of April, in the year of
our Lord One thousand eight hundred and fifty-eight:
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