AN IMPROVED METHOD OF PRODUCINGCING SIMULTANEOUSLY GAS LIGHT AND LIME OR PLASTER
Year: 1852

page_text: LETTERS PATENT to Joseph Paul Marc Floret, of Paris, in the
Republic of France, and of 16, Castle Street, Holborn, City,
London, for the Invention of "AN IMPROVED METHOD OF PRODUCING
Sealed the 14th June 1853, and dated the 14th December 1852.
PROVISIONAL SPECIFICATION left by the said Joseph Paul Marc
Floret at the Office of the Commissioners of Patents, with his
Petition, on the 14th December 1852.
I, JOSEPII PAUL MARC FLORET, of Paris, in the Republic of
France, and of 16, Castle Street, Holborn, City, London, do hereby
declare the nature of the said Invention for "AN IMPROVED METHOD
OF PRODUCING SIMULTANEOUSLY GAS LIGHT AND LIME OR PLASTER" to be as
follows:-
For the distillation of hydrogen carbonic gas, the greatest expense
is that of the fuel used to heat the retorts. A saving of this expense
can be effected, by combining the production of the gas with the
burning of lime or plaster. In this case no fuel is employed but

page_text: that which is necessary, for the burning of the calcarious substance
or gypsum, and whose value is recovered in the price of the lime
or plaster. The oven is constructed in the shape of two flattened
cones, joined at their base A, Fig. 1. This base may be widened
out in an oval, so as several retorts may be placed there. A kind
of vault is constructed in the centre of the oven, at the height of
the great transversal diameter B, Fig. 3. The retorts are placed
on this vault, and fixed at their base in the fire brick lining of the
The tops or necks of the retorts come out at the opposite
side, and pass through the wall C, Figs. 1, 2, 3. It is by this end
that the retorts are loaded, as is usually done. The burning of
the lime or plaster is effected in successive ovens with a small flame,
by a mixture of the calcareous matter or gypsum with coal or coke
in suitable proportions, which are introduced by the upper opening
of the oven X, Fig. 3. The lime or plaster being burnt, rests red
hot and incandescent on the retorts, flows round them and heats
them. The lime or plaster is taken from the oven by the opening D,
Figs. 2, and 3.
The distillation of coal is thus effected as perfectly as in a
special oven. From the tubes of the retorts the gas is conducted
in small barrels, and the rest of the manufacture is conducted as
usual.
I claim right of applying, or working the oven herein described,
and the simultaneous production of lime or plaster, and of gas; I
claim also the right of applying the heat produced in the burning of
lime and of plaster to the distillation of coal, in said manner as to
obtain gas fit for lighting or heating, which can be realized with
ovens of different dimensions & different shapes.
SPECIFICATION in pursuance of the conditions of the Letters
Patent, filed by the said Joseph Paul Marc Floret in the Great 30
Seal Patent Office on the 14th June 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
JOSEPH PAUL MARC FLORET, of Paris, in the Empire of France,
and of 16, Castle Street, Holborn, City, London, send greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourteenth day of December, in
the sixteenth year of Her reign, in the year of our Lord One thousand
eight hundred and fifty-two, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Joseph Paul Marc Floret,
Her special licence that I, the said Joseph Paul Marc Floret, my exe-
cutors, administrators, and assigns, or such others as I, the said Joseph
Paul Marc Floret, 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 of "AN IMPROVED METHOD OF PRODUCING SIMULTANEOUSLY GAS
LIGHT, AND LIME OR PLASTER," upon the condition (amongst others)
that I, the said Joseph Paul Marc Floret, by an instrument in
writing under my hand and seal, 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
inmediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Joseph Paul Marc Floret, do hereby
declare the nature of my said Invention, and the manner in which the
same is to be performed, to be particularly described and ascertained
in and by the following statement, and by the Drawings hereunto
annexed (that is to say):
My Invention consists in an improved method of producing
simultaneously gas light, and lime or plaster. In the distillation
of hydrogen carbonated gas, the greatest expense is that of the fuel
employed to heat the retorts. A great economy may be effected
by combining the production of this gas with the baking of lime
or nortar. There is in this case no fuel used but that which
is necessary for the baking of the calcareous matter or gypsum,
and consequently the lime or mortar may be made at a less
expense. The oven is constructed in the shape of two truncated
cones, joined at their bases A (Fig. 1). This basis may be wide

page_text: or oval, so as to allow of placing two or several retorts. A vault
is made in the centre of the oven or furnace, at the height of the
greatest transversal diameter B (Fig. 3). The retorts are placed
on this vault, and fixed at their bases to the case of the oven,
which is of refractory bricks. The mouths of the retorts come out
on the opposite side, and are seen out of the wall G (Figures 1, 2
and 3). It is, as usual, by these ends that the retorts are filled.
The baking of the lime or mortar is made as in continuous ovens
or kilns, not raised to a high temperature, by a mixture of calcareous
matter or gypsum, and coal or coke in suitable proportions, intro-
duced in the upper opening of the kiln X (Figure 3). The lime or
plaster being baked, becomes red hot, incandescent on the retorts,
and circulates round them, and heats them. The lime or mortar
is withdrawn by the mouth of the kiln D (see Figures 2, and 3).
The distillation of the coal is thus effected as perfectly as in a
furnace specially adapted for the purpose. The gas is conducted
from the tubes of the retorts into the gas barrels, and the remainder
of the manufacture is accomplished in the usual manner.
I claim, First, the application of the herein described kiln to the
simultaneous production of lime or mortar, and gas.
Secondly, the application of the heat produced by the baking of
the lime and mortar, to the distillation of coal, so as to obtain gas
fit for lighting purposes or for burning.
In witness whereof, I, the said Joseph Paul Marc Floret, have
hereunto set my hand and seal, this Eighth day of
June, in the year of our Lord One thousand eight hundred
J. P. M. FLORET. (L.S.)