IMPROVEMENTS IN GAS OVENS FOR COOKING PURPOSES
Year: 1880

page_text: LETTERS PATENT to Thomas Fletcher, F.C.S., of Warrington, in the County
of Lancaster, for an Invention of "IMPROVEMENTS IN GAS OVENS FOR
COOKING PURPOSES."
PROVISIONAL SPECIFICATION left by the said Thomas Fletcher at the
Office of the Commissioners of Patents on the 20th September 1880.
THOMAS FLETCHER, F.C.S., of Warrington, in the County of Lancaster.
'IMPROVEMENTS IN GAS OVENS FOR COOKING PURPOSES."
I construct an oven or chamber for cooking purposes to be heated by gaseous
fuel applied underneath and outside the bottom of the oven. The lower part of
this oven is perforated to allow the heated air and products of combustion to ascend
inside and pass through the oven, and which escapes through an outlet or
perforations provided in the upper part.
I thus utilize the heat which would otherwise be wasted, and make an oven
which has a current of heated air passing through it, thereby ensuring the perfect
roasting of meat, baking of pastry and bread, and all cooking purposes for which
an oven is used.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Fletcher in the Great Seal Patent Office on the 19th March
1881.
THOMAS FLETCHER, F.C.S., of Warrington, in the County of Lancaster.
"IMPROVEMENTS IN GAS OVENS FOR COOKING PURPOSES."
I construct an oven or chamber for cooking purposes to be heated by gaseous
fuel applied underneath and outside the bottom of the oven. The lower part of
this oven is perforated to allow the heated air and products of combustion to ascend
inside and pass through the oven, and which escape through an outlet or perforations
provided in the upper part.
On the accompanying Drawing Fig. 1 represents a side sectional view of an
oven constructed in accordance with my Invention, and drawn to a scale of about.
quarter size, and Fig. 2 is a sectional plan of Fig1-across-the-line a=b. A is the
-oven, which-is-by-preference constructed of sheet iron, and provided at front with
the usual hinged door B. This oven is heated by the gas burner_C_(or_any-other-
suitable gas burner burning-a-mixture of gas and air and giving a blue smokeless
flame) which is placed underneath_and_outside-the-bottom of the oven in the
spaco-D,-this-space being utilised as a chamber for grilling or toasting, as herein-
after described. The bottom E of the oven as well as the removable shelf F are
both provided with perforations G, so that the heated air and products of com-
bustion from the gas burner C can enter and ascend inside and pass through the
oven, and which heated air and products then pass through the opening H into the
double casing I, and thence through the perforations J into the upper oven K,
from which they finally escape through the outlets L into the atmosphere, or may
be led into a flue.
In some cases
dispense with the upper oven K, in which case the roof or upper
part of the oven A is made similar to that of the upper oven K.
In this arrangement of oven I utilise most of the heat which would otherwise be
wasted, and make an oven which has a current of heated air passing through it,
thereby ensuring the perfect roasting of meat, baking of pastry and bread, and
capable of all cooking purposes for which an oven is used. By arranging the flame
underneath and outside the oven the radiated heat downwards from the bottom of
the oven is utilised separately for grilling, browning, toasting, &c.
In witness whereof, I, the said Thomas Fletcher, have hereunto set my hand
and seal, this Eleventh day of March, in the year of our Lord One thousand
eight hundred and eighty one.