A NEW AND IMPROVED OVEN FOR BAKING BREAD, MEAT, AND OTHER FOOD APPLICABLE FOR OTHER PURPURSES REQUIRING FIRE OR HEAT
Year: 1875

page_text: LETTERS PATENT to Henri Adrien Bonneville, of the British and
Foreign Patent Offices, 18, Rue de la Chaussée d'Antin, Paris,
France, and 6, Piccadilly, in the County of Middlesex, Patent
Agent, for the Invention of "A NEW AND IMPROVED OVEN FOR BAKING
BREAD, MEAT, AND OTHER FOOD APPLICABLE FOR OTHER PURPURSES REQUIRING
FIRE OR HEAT."-A communication from Charles Lesobre, residing
at No. 17, Rue de l'Estrapade, Paris, France.
COMPLETE SPECIFICATION filed by the said Henri Adrien Bonneville
at the Office of the Commissioners of Patents, with his Petition
and Declaration, on the 27th May 1875, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRI
ADRIEN BONNEVILLE, of the British and Foreign Patent Offices, 18, Rue
de la Chaussée d'Antin, Paris, France, and 6, Piccadilly, in the County
of Middlesex, Patent Agent, send greeting.

page_text: In the centre of the inside cylinder a spindle E standing on a base F
supports the turning sole G; this spindle turns in sockets H, H, at its
lower and upper part, and thus it is balanced.
The rotating motion is imparted to the sole G by slight pressing at
right or left with the fire-shovel, or any other instrument on small ears
projecting a little at equal distances from each other on the edge of the
sole.
If it is not wished that the spindle pass through the compartments of
the oven, any mechanical contrivance whatever for imparting the motion
may be applied.
On the frame of the sole is fitted a sheet iron disc, upon which is laid
a terra cotta flooring. Instead of the said flooring a second sheet iron
plate may be fitted some centimetres above the first at the level of the
mouth of the oven. In this case there is between the two sheet iron
plates or discs a space filled with air, which is uniformly heated in such a
manner that the burning of the food will be prevented and the cooking
equalized.
From the fire-box I, formed of cast iron, two cast-iron pipes J extend
along below the sole, which will thus be heated, then pass between the
two concentrical cylinders, and afterwards above the first compartment,
then below and above each other other compartment so as to heat
successively all the compartments and to utilize the products of the
combustion.
A damper K at the top of the oven allows the draught to be increased
according as required.
Any kind of combustible, viz., wood, peat, coal, coke, may be used.
The first compartment L which is nearest the fire-box is always
provided with a turning sole. Indeed the object of the rotation of
the sole is not only to facilitate putting things in the oven and taking
them out, but also and chiefly to equalize the cooking. An equalized
cooking would not always be sure to be obtained if the sole did not turn,
for in that case certain places of the sole would be overheated by the
fire.
mi
nuovided with busine

page_text: less over hasty heating is to be feared, as the temperature is more
equalized by the diffusion of the heated gases. Again, each compartment
can be divided into several floors so as to multiply the surface for
cooking.
Above the oven can be placed a boiler to heat the water required for
the laboratory by means of the lost heat.
A small stove provided with shelves can be constructed between 'the
two cylinders to keep warm the things already cooked in the oven.
Such are the whole of the arrangements of the improved oven. This
apparatus can be put together and taken to pieces in a few hours, and
from 40 to 50 minutes only are required to heat it and raise the inside
temperature high enough for cooking, very little fuel being used. It
can be placed on every storey the same as a simple stove, and can
even be set on the wooden flooring, care being taken to put a sheet
iron plate below. It can also be placed on a cart or even simply on
wheels.
The improved oven is then really an article of furniture, and is
adapted for small bakehouses, for families cooking their own bread, for
'farms, schools, for country seats, for resident and travelling confectioners,
restaurant and hotel keepeers, for use on board ships, for armies in the
field; for let it be again remarked this apparatus cooks all kinds of
food and fulfils all culinary requirements. It may also be used for
preparing all sorts of preserves and for drying any substances whatever.
The outside casing may be made square if desired. This casing may be
made of masonry if the apparatus is to be stationary.
Finally the outside casing can be decorated in such a manner as to
give it the most varied and elegant forms, even the appearance of a
piece of furniture of mahogany, violet ebony, ebony, or of any other
precious wood.
Having thus described the said Invention and the manner of carrying
it into effect, I would have it understood that I do not confine myself to
the precise details above enumerated, as these may obviously be modified
without departing from the principle of the Invention according to the
applications thereof, but what I claim is an aerotherm portable oven
provided with a turning lower sole in combination with other stationary

page_text: or turning upper soles, and with two concentrical casings separated from
each other by a space filled with non-conducting matter, all constructed
substantially as above described and represented in the accompanying
Drawings.
•
In witness whereof, I, the said Henri Adrien Bonneville, have
hereto set my hand and seal, this Twentieth day of May, in
the year of our Lord One thousand eight hundred and seventy
five.

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