Improvements in Cooking Stoves.
Year: 1894

page_text: Date of Application, 1st May, 1894-Accepted, 23rd June, 1894
COMPLEIE DI PATIOTION
Improvements in Cooking Stoves.
I, CARL DANIEL MOBERG, of Mekaniska Verkstaden Vulcan Norrköping, in
the Kingdom of Sweden, Engineer, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
When heating food in small quantities, such as coffee, tea, milk, etc., gas or
petroleum stoves are frequently used in order to avoid lighting fires in kitchen-
ranges. The said stoves have, however, several disadvantages inasmuch as they
are liable to catch fire, emit a bad smell, and are difficult to keep clean; moreover
the cost of the fuel is rather high.
My invention relates to a cooking apparatus which is free from these
disadvantages and by means of which the cooking can be rapidly effected with a
minimum consumption of fuel when cooking food in small quantities, thus supplying
an improvement which has long been wanted.
In the accompanying drawing,
Figures 1 and 2 are vertical sections of a cooking apparatus constructed
according to my invention, the two sections being taken at a right angle one to
the other:
Figure 3 is a plan of the same:
Figure 4 is a similar view to Figure 2 but shewing a somewhat modified
arrangement of the apparatus:
•
Figure 5 is a section of part of another apparatus of modified construction.
The apparatus consists of a smoke-box or casing A containing a fire-box B with
grate C and ash-pit E. The smoke box or casing is open at the bottom and
provided externally with a flange G so that it can be placed in an aperture in the
kitchen range; it has at the top a plate F provided with a hole for receiving the
cooking-vessel. Immediately below the plate F, the fire-box is provided with
holes D through which the smoke can pass into the space between the fire-box and
the casing in order to descend into the kitchen range, the fuel being introduced
through the fire-box opening closed by the door H. Round the said opening the
fire-box wall and the casing are placed close to each other so that the before
mentioned space will not communicate with the opening.
When the apparatus is to be used, it is placed in a suitable aperture in the
kitchen range or on a stove, and in its own boiling aperture the cooking-vessel is
placed. When cooking the flame sweeps the bottom of the vessel and comes in
contact with its sides as far as these descend into the fire-box, and the products of
combustion escape through the holes D and through the range.
The air for combustion flows into the ash-pit through the valve of its door and
mounts through the grate to the fire-box. The products of combustion pass the
outside of the fire-box as well as the ash-pit and thus heat the latter, whereby
the air for combustion when flowing through the ash-pit will be heated. This
latter thus serves also as a heater for the air whereby fuel will be saved.
The advantages of this apparatus will be easily understood. It cannot emit aný
smell or smoke, it speedily boils the food after firing, owing to so great a surface
of the boiling vessel being exposed to the fire and it only requires a small quantity
of fuel. Moreover the cheapest kind of fuel can be used, which is not the case
with a gas or petroleum stove, and no unnecessary surfaces are heated, as is the
case when an ordinary range is used every time a small quantity of cooking is
to be done.

page_text: The apparatus is easy to transport and needs no funnel; it is always manu
factured of such a size as to fit in some of the range holes or in some of the
rings to the same. It is also provided with a lid for covering the cooking hole
when not in use.
It is obviously not necessary to make the fire-box and the casing in one piece.
The plate F may, for instance, as shewn in Figure 4, rest loosely upon the casing
and not be united with the fire-box.
In order that the apparatus may be used even where there is no range or stove
provided with cooking holes it can be modified in the way also shewn in Figure 4.
The casing A is at its lower end provided with a bottom, feet and a smoke pipe N.
The latter enters the casing above the bottom and is provided with an opening O
immediately under the fire-box. The escaping products of combustion are thus
caused to traverse just as long a passage to the outlet and are distributed uniformly
around the fire-box and its ash-pit so that the latter is also heated for the above
mentioned purpose. In order to protect the casing at the top where the products
of combustion leave the fire-box, the covering plate F is provided with a downwardly
projecting flange P forming a ring enclosing the upper edge of the fire-box.
Between the said edge and ring there is a sufficient opening to let the products of
combustion pass through, but the returning flame is prevented by the ring from
touching the casing. With this modification the apparatus does not lose any of its
capacity for rapid heating with a small consumption of fuel, but its utility is
increased so that it can be used at any place where it is possible to cause the smoke
to escape, such as on board pleasure boats, in the open air, etc. For the greater
convenience of transport it is provided with a handle R.
: J As it is only the lower part of the casing A which is different in the two modi-
fications of the apparatus shewn it is easy, by making the said part form a separate
piece which is removably attached to the apparatus, to arrange this latter in such
a way that it can be used either on a kitchen range or independently, as shewn in
Figure 5. The casing near the foot is formed in two parts A and A'. The upper
part A is open below and provided with flanges, as shewn in Figure 1, so that it
can fit over the kitchen-range hole. The lower part A' in which the upper part
can be placed and fits has an outside flange a provided with clamps b which can be
turned over the horizontal flange of the upper part, whereby the parts A. and A'
will be united with each other. The lower part is provided with a cast smoke
channel the continuation of which is formed by the smoke pipe as is distinctly
shewn in the figure. According as the apparatus is to be used in connection
with a kitchen range or not, the loose part A' is removed from or united with
'the same.
.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A cooking apparatus designed to be placed in one of the holes of an ordinary
range or stove consisting of a casing A adapted to fit the said holes and open at
the bottom and provided externally with a flange, the said casing containing a
fire-box, grate and ash-pit, which fire-box by means of one or more openings
communicates with the space between the same and the casing and above which
there is on the casing a covering plate with holes for the cooking vessel, the casing
and the fire-box being provided with a fire-door and ash-pit door at the side for
the purpose of cooking small quantities with as direct a heating as possible, the
range being used as a smoke outlet, substantially as set forth, and illustrated in
Figures 1, 2 and 3 of the accompanying drawing.
2. The modification of the apparatus specified in Claim 1 in which the casing
is closed at the bottom and provided with a smoke-pipe entering below the centre
of the fire-box in order that the air for combustion, entering through the ash-pit,
may be heated substantially as herein before described and illustrated in Figure 4 of
the accompanying drawing.
:

page_text: 3. In the apparatus specified in the first claim the arrangement of flange extending
downwards from the covering plate, between which flange and the upper edge of
the fire-box which is inside the flange there is a space for the passage of the products
of combustion for the purpose of protecting the casing against the flame returning
above the said edge, substantially as hereinbefore described and illustrated in
Figure 4 of the accompanying drawing.
4. In the apparatus specified in Claims 1 and 2 the arrangement of divided
casing and parts united in such a way that they can be easily separated in order
that the lower part may be removed or attached according as the apparatus is to
be used in connection with another apparatus provided with cooking holes (for
instance a kitchen range) or independently, substantially as herein before described
and illustrated in Figure 5 of the accompanying drawing.
5. The improved cooking apparatuses hereinbefore described and illustrated
in Figures 1 to 3, Figure 4, and Figure 5 respectively of the accompanying
drawing.
3004
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.