CERTAIN IMPROVEMENTS IN BAZING OUDNS RAZ IN BAKING OVENS
Year: 1855

page_text: LETTERS PATENT to Charles Hewett, of No. 8, King's Row, Pentonville,
in the County of Middlesex, Chocolate Manufacturer, for the Invention
of "CERTAIN IMPROVEMENTS IN BAZING OUDNS"
of
CERTAIN IMPROVEMENTS
IN
RAZING Qars
"
PROVISIONAL SPECIFICATION left by the said Charles Hewett at the
Office of the Commissioners of Patents, with his Petition, on the 10th
September 1855.
I, CHARLES HEWETT, of No. 8, King's Row, Pentonville, in the County of
Middlesex, Chocolate Manufacturer, do hereby declare the nature of the said
Invention for "CERTAIN IMPROVEMENTS IN BAKING OVENS " to be as follows:-
The Drawing herewith represents a form of oven constructed according to
iny plan; it is made of metallic plates, which I prefer to be iron boiler plates,
rivetted or fastened, so as to be air-tight. The internal space A is surrounded
on five sides by the external case B, C, without communicating with it. The
apertures D, E, are holes in the door, for the purpose of renewing the air in
the oven when wanted. These holes, however, may be stopped up when
desired. The external space is filled with oil or other fluid capable of being
heated to the necessary temperature, and which is introduced into the said
space by or through the tube F, which may be led into the flue, so as to carry
off any unpleasant effluvia which might arise. The tube G is closed by a cork
or stuffing box, and traversed by a thermometer plunging into the oil or other
fluid, so as to ascertain its temperature. The tube F has an enlargement at

page_text: H, up to which I fill the space between the plates, in order to make sure that
that space is constantly full. The oven is set as usual over a furnace, so as to
be able to bring the fluid between the plates to the proper temperature, after
which the loaves, pies, or other articles to be baked are introduced into the
internal space A, and left therein the time necessary for them to be baked.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Hewett. in the Great Seal Patent Office on the
10th March 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
HEWETT, of No. 8, King's Row,. Pentonville, in the County of Middlesex,
Chocolate Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of September, in the year of our Lord
One thousand eight hundred and fifty-five, in the nineteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Charles Hewett, Her special license that I, the said Charles Hewett, my
executors, administrators, and assigns, or such others as I, the said Charles
Hewett, 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 "CERTAIN IMPROVEMENTS IN BAKING
OVENS," upon the condition (amongst others) that I, the said Charles Hewett,
by an instrument in writing under hand and seal, should particularly
describe and ascertain the nature of the said Invention, and in what manner
the same was to be performied, 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 Charles Hewett, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, that is to say:-
My improvement consists in having ovens made of two chambers or cases of
suitable dimensions, one within the other, and made of sheets of metal, which
I prefer to be of wrought iron, well screwed together or rivetted, so as to be
perfectly tight, and in the interval between the two chambers I introduce

page_text: grease or oil, so that by applying heat to the outer case the inner one may be
heated by the oil or grease contained between.
The annexed Drawing represents a form of oven constructed according to
my plan. The oven is made of metallic plates, which I prefer to be iron
boiler plates, well rivetted together so as to be quite tight. The internal space
A is surrounded on five sides by the external case C, C, but does not com-
municate with it. The apertures D, E, are holes for the purpose of renewing
the air when wanted; these holes, however, may be stopped up when desired.
The space between the two cases is filled through the tube H with oil or other
fluid which can be heated to the desired temperature, and this tube H, which
is enlarged at the end like a funnel for the convenience of pouring the liquid,
may be surmounted by a cover provided with a pipe F, which may be in
communication with a flue or with the open air, for the purpose of carrying off
any unpleasant odour which might arise. The oven may be provided with a
tube G, closed by a cork or stuffing box, traversed by a thermometer plunging
into the oil or other liquid round the oven, for the purpose of ascertaining its
temperature. The oven is set as usual upon a furnace, or may be heated in
any convenient way, so as to bring the fluid between the plates to the
temperature requisite for baking the articles introduced into the inner casc
or oven A.
In witness whereof. I have hereunto set my hand and seal, this Tenth
Signed in the presence of
LOUIS NORMANDY.
CHARLES HEWEII. (L.S.)