AN IMPROVED COOKING STOVE
Year: 1861

page_text: LETTERS PATENT to Pierre Gipouloux, of 20, Rue Thevenot, Paris, for
the Invention of "AN IMPROVED COOKING STOVE."
Sealed the 10th October 1861, and dated 16th April 1861.
PROVISIONAL SPECIFICATION left by the said Pierre Gipouloux at the
Office of the Commissioners of Patents, with his Petition, on the 16th
April 1861.
I, PIERRE GIPOULOUX, of 20, Rue Thevenot, Paris, do hereby declare
the nature of the Invention for "AN IMPROVED COOKING STOVE," to be as
follows:-
In con
This Invention has for its object an improved cooking stove.
structing a cooking stove I arrange on each side of the fire grate two gas
retorts, and the flues from the fire grate are arranged in such a manner that the
flame and heated air from the fire in the grate are divided into two branches,
and pass over the top of the retorts and descend on the other side thereof, which
are thus heated:-The flame and heated air in one of the branch flues in
descending also beats a boiler, and that in the other flue heats a bain-marie;
the boiler and the bain-marie being placed at the further sides of the retort,
with the vertical descending flues between them and the retorts; the flame and
heated air descending by these flues comes on to the top of two ovens used for
baking, and which are thus heated; the two branches of the flue then unite
and
pass s out at the back of the stove to the chimney. The gas produced in

page_text: the retorts is caused to pass through a vessel containing water, which con-
denses the tar and some other impurities, and these are drawn off by a
suitable stop-cock from time to time. The gas then passes through a purifier
charged with any suitable purifying material, and thence to a small gasometer
from which it is supplied to the burners.
The coke drawn from the gas retorts serves to supply the fire-grate, which is
charged through a hole fitted with a cover at the top of the stove. The fire-
grate is closed in front, and has an ash-pit beneath. The doors of the gas
retorts are at the front of the stove, they are removed to withdraw the coke
and re-charge the retorts.
In this manner I am enabled to manufacture gas without any greater
expenditure of fuel than that necessary for the supply of any ordinary cooking
stove of equal size.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed.
by the said Pierre Gipouloux in the Great Seal Patent Office on the
16th October 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PIERRE
GIPOULOUX, of 20, Rue Thevenot, Paris, send greeting.
WHEREAS Her most-Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of April, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Pierre Gipouloux, Her special licence that I, the said Pierre Gipouloux,
my executors, administrators, and assigns, or such other as I, the said Pierre
Gipouloux, 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 Britian and Ireland, the Channel
Islands, and Isle of Man, an Invention for "AN IMPROVED COOKING STOVE,"
upon the condition (amongst others) that I, tho said Pierre Gipouloux, 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 per-
formed, 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.

page_text: NOW KNOW YE, that I, the said Pierre Gipouloux, do hereby declare the
nature of my said Invention, and in what manner the same is to bo per-
formed, to be particularly described and ascertained in and by the following
statement:
My Invention consists in the novel combination and construction of an im-
proved cooking stove, the fire employed to that effect being also made availablo
to generate gas adapted for illuminating, heating, or other purposes.
:
In order that my Invention may be better understood I have represented it
in the accompanying Sheet of Drawings, where Fig. 1 is a plan complete of
my improved furnace for cooking, heating, and generating gas; Fig. 2, a front
elevation; Fig. 3, a front elevation in section through A, A, Fig: 1; Fig. 4,
& 6, detached
a lateral elevation in section through B, B, Fig. 3; Fig. 5
views of mechanism relating to the production and purification of gas.
b is the grate on which I build my fire, the heat from which passes horizontally
under the retorts a, a, rises behind the same through the flue f, where it
returns horizontally over the retorts, and ascends through a flue h, and there
dividing itself in two currents i, i, passes through h', h", to the chimney d.
In order to avail myself of the heat on its passage through h, i, i, h¹, and h", I
cover the apparatus with a metal plate on which the cooking utensils are placed.
At the openings h' and h", they are brought in direct contact with the heat;
jj, are two side ovens which can serve for baking and plate warming. I
regulate the draught of the fire by opening or closing the fire-door or ash-pit
doors as well as by means of an ordinary throttle valve placed in the chimney d.
For the production of gas either or both of the retorts a, a, are charged about
half full of coal, the doors k, k, being afterwards luted and closed in the usual
manner. I prefer making these retorts of cast iron, although they may be
composed of any other suitable material usually employed. They are set
horizontally or nearly so, and cast with an extra thickness at their lower
surface, which is struck directly by the fire. The three horizontal separations
e, e, e, are for the purpose of preventing the heat proceeding directly from the
grate to the opening c. The gas generated in the retorts is conducted there-
from through the pipes 1, 1, to the horizontal main m; both these pipes / are
provided with plugs 1, 1, for the purpose of cleaning the same of any
obstructions.
I have represented at Fig. 5 a longitudinal elevation in section of another
main with branch pipes from the retorts united directly underneath same by
means of flanges; this main is likewise provided with plugs for the same
purpose as above specified; and in order to prevent the escape of the coal tar
I provide this pipe internally, from place to place, with stops or bridges n, n,

page_text: and by giving a gradual incline to those parts of the pipe leading from the said
stops to the upright pipes, the coal tar is thus conducted back in the retorts,
and is made available for the production of gas. On leaving the main the gas
is conducted through the washer o, where it is cleansed of ashes, dust, etc., by
its contact with the water. s and s' are small cocks for renewing, discharging,
and guaging the water contained in the apparatus, from thence it is conducted
through the pipe p to the purifier, where it rises successively through the trays
containing lime q, and eventually discharges itself through the pipe r, fit for
use. It will be observed that I form the washer and purifier in one for
greater simplicity, commodity, and economy.
In witness whereof, I, the said Pierro Gipouloux, have hereunto
set my hand and seal, this Seventh day of October, in the year of our
Lord One thousand eight hundred and sixty-one.
P. GIPOULOUX. (L.S.)