IMPROVEMENTS IN APPARATUS FOR COOKING AND EFFECTING OTHER SIMILAR DOMESTIC REQUIREMENTS
Year: 1874

page_text: PROVISIONAL SPECIFICATION left by John Whelan at the Office of
the Commissioners of Patents, with his Petition, on the 28th
September 1874.
I, JOHN WHELAN, of Lower Clapton, in the County of Middlesex,
Ironmonger and Gas Fitter, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN APPARATUS FOR COOKING AND EFFECTING
OTHER SIMILAR DOMESTIC REQUIREMENTS," to be as follows:—
This Invention relates to improvements in apparatus for cooking and
effecting other similar domestic requirements.
From the imperfect construction of gas cooking apparatus as
hitherto constructed, there have arisen many objections which have pre-
vented the more general adoption of such cooking apparatus; many of
the main defects are caused by the too ready escape of the heat which
is effected before it is completely utilized, and which is caused by
placing the escape aperture at the top or upper part of the apparatus
so that the heat ascends directly thereto and escapes.
The main features of my Invention (by the combination of which I
am enabled to produce a gas cooking apparatus having much increased
capabilities of thoroughly effecting what is ordinarily required of it)

page_text: consist in forming the apparatus with a lower heating or roasting
chamber to the interior of which the heat has direct access, and with
an upper heating or baking chamber which is heated by the circulation
around it exterior of the heat after it has performed its functions in the
lower chamber.
The chambers are each surrounded with a casing or jacketing, and
the upper chamber is separated from the lower chamber by a diahragm
which is perforated around near its circumferential edge to allow of
access of the heat from the lower chamber to the jacketed space around
the upper chamber.
After the heat has thoroughly circulated in and about the lower
chamber and around the upper chamber it finds outlet (after having
thus been completely utilized) at the lower part of the jacketed space
around the lower chamber, thus being compelled to return its whole
course, and keep the whole of the apparatus of a uniform temperature.
This is of especial importance in the baking of all kinds of pastry which
requires a quickly permeating heat to prepare it properly, & which has
never yet been economically obtained as regards the consumption of
the gas.
The heat is obtained from an arrangement of atmospheric burners
placed inside and at the lower part of the lower chamber but near its
circumference so as entirely to be out of the way of any falling fat, any
disagreeable smell or odour arising from burnt fat or grease is thereby
prevented.
A further feature of this Invention consists in placing the cooking
apparatus upon a table or bracketed support, so that the space under-
neath it can be utilised for the deposit of culinary or domestic utensils.
Alongside the lower chamber I also arrange an auxiliary heating or
boiling apparatus, with an arrangement or series of atmospheric burners
supplied from one supply pipe. This apparatus, in addition to the
burners, consists mainly of a suitable oblong or other shaped metallic
framing, carrying a grating placed above the burners, and upon which
the culinary or domestic vessels are placed, and at one end or side of
this part of the apparatus I place a domestic boiler of any suitable
capacity which I provide with a through tube, and through which tube
I run a pipe perforated with a series of atmospheric burners, and by
which the water in the boiler is kept heated.

page_text: To prevent cold water having access to this boiler I connect an inlet
and an outlet pipe from it to an upper small cistern supplied by an
ordinary ball-cock arrangement, so that the heated water constantly
circulates between the boiler and the small supply cistern, and is never
allowed to enter the boiler in a cold state.