Year: 1886

page_text: Date of Application, 16th Mar., 1886.
Complete Left, 3rd Dec., 1886.
Complete Accepted, 5th Jan., 1887.
We, ALFRED VON NEUFVILLE, and GUSTAV WARNECKE, both of Frankfort of Main,
in the Empire of Germany, do hereby declare the nature of this invention to be as
follows:-
This invention relates to portable cooking apparatus.
The essential feature of this improved cooking apparatus is that the fire-place and
heating chamber are arranged in the interior of the same, whereby, on the one hand a
complete utilization of the heat and a consequent saving of fuel are effected, and on the
other hand, a great heating effect is obtained and a consequent rapid preparation of
food or drink.
Field-boilers having internal heating tubes are not new, trials having already been made
with them; they have not however exhibited any material advantages relatively to the
old forms of field-boilers, especially that of occupying a small space. The want of
this success is no doubt principally owing to the circumstance that in all the experi-
ments made in this direction the fire-place or the heat chamber has been arranged
below the boiler; as in the open air there is always a more or less strong current of
air, a fire situated below the boiler must in any case be disadvantageously influenced
by the current and in a strong wind or during rain sometimes hours pass before the
water in the boiler commences to boil:
This defect is obviated according to the present invention by arranging the fire place
and heat chamber in the interior of the boiler. The object of this is two-fold, namely
1st. A complete utilization of the fuel, and .
2nd. An undisturbed process of combustion which is not disadvantageously
influenced, even by the most unfavourable weather.
In order to increase the intensity of the combustion, the central heating tube is
arranged in such a manner that it can be prolonged beyond the cover of the boiler to
form a chimney. This is effected by constructing the said heating tube so that it can be
Irawn out like a telescope, or by putting upon the same a second, third, or fourth
ube.
The grate is hinged to the boiler at two sides.
Instead of being hinged the grate can be arranged in an enlargement formed in the
ower part of the fire place, which enlargement corresponds with the size of the grate,
he latter being fixed at this place by bars, or the like, placed beneath it.

page_text: The chimney sometimes forms a prolongation of the heating space. For transpor-
tion the tubular pieces forming the prolongation are slipped one into the other, and
the boiler is closed by means of a cover. In use the smoke-pipe is drawn out, and the
fuel is inserted into the fire-place in the form of a cartridge, the grate having been
previously moved aside for this purpose. When the grate is again brought back to
its position, the cartridge may be lighted. The heating space is sometimes enlarged
so that it can serve as a magazine for carrying a quantity of fuel. The fire place can
also be used for the same purpose.
•
When one or more separate tubes are used for the chimney it or they may be placed
in the boiler, during transportation.
The boiler is sometimes made reversible. For soups and the like the lower larger
portion can be used in the described manner. When, however, only coffee, tea or
the like is to be boiled, the boiler is simply turned over so that its smaller part is
downward. By turning round the grate, its position is correspondingly changed
and the upper larger part now serves as a cover.
This construction has the advantage that, for instance coffee and soups, can be boiled
in separate vessels so that the flavour. of either is not affected.
The cooking apparatus is preferably provided with an eye by means of which it can
be fastened to a post in the ground during cooking or to the belt of a soldier.
Although this cooking apparatus is principally designed for military purposes it is
also applicable for other purposes, on account of its general usefulness and the great
saving of fuel. It is especially applicable for workmen who are generally compelled
to prepare their food and drink in the open air.
It should finally be observed that this cooking apparatus can also be used in the
ordinary manner upon the hearth or above an open fire, the above-mentioned cartridges
being then unnecessary.
HASELTINE, LANE,
45, Southampton Buildings, London,
Agents for the Applicants.

page_text: We, ALFRED VON NEUFVILLE, and GUSTAN WARNECKE, both of Frankfort of Main
in the Empire of Germany, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to portable cooking apparatus.
The essential feature of the improved cooking apparatus is, that the fire place er
heating chamber is arranged in the interior of the same, whereby, on the one hand a
complete utilization of the heat and a consequent saving of fuel are effected and on'
the other hand a great heating effect is obtained, and consequent rapid preparation of
food or drink.
Field-boilers having internal heating tubes are not new, trials having already been
made with them; they have not, however, exhibited any material advantages relatively
to the old forms of field-boilers, especially that of occupying a small space. The wans
of the success is no doubt principally owing to the circumstance that in all the
experiments made in this direction the fire-place or the heat chamber has been arranged
below the boiler. . As in the open air there is always a more or less strong current ol.
air, a fire situated below the boiler must, in any case, be more or less.disadvantage-
ously influenced by the current and in a strong wind or during, rain,.hours sometimes
pass before the water in the boiler commences to boil.
This defect is obviated, according to the present invention, by arranging the fire-
place or heat-chamber in the interior. of the boiler. The object of, this is two-fold
namely,
1st. A complete utilization of the fuel, and
2nd. An undisturbed process of combustion which is not disadvantageously influenced
even by the most unfavorable weather.
In the accompanying drawings we have represented several modifications of our
improved cooking apparatus, which modifications are, however, all based on the same
principle.
Figure 1 is a central vertical section of one form of apparatus constructed according
to our invention.
Figure 2 is a section of the same on the line a, b.
Figure 3 is a central vertical section showing the apparatus arranged for transport.
Figure 4 is a view of a detail.
Figures 5 and 6 are sectional elevations illustrating different modifications of, the
said invention.
Figure 7 is an elevation showing how the apparatus is mounted when.in.use.
A is the boiler of the apparatus which is provided with the cover B and with the
central tube H forming the fire-place or furnace.
In order to increase the intensity of the combustion the central heating-tube His
arranged in such a manner that it can be prolonged beyond the cover of the boiler to
form a chimney. This is effected by constructing the said central tube a so that it can
be drawn out like a telescope as shown in Figures 1 and 3, or have one or more tubes b
affixed thereto as shown in Figures 5 and 6.
The grate is hinged to the boiler and is composed of a rod which, immediately
below the fire-place, is provided with several bends forming the necessary extension

page_text: (Figure 4) for preventing the heating material or fuel from falling out of the fire-
place.
Instead of being hinged, the grate can be arranged in an enlargement formed in the
lower part of the fire place, as shown in Figure 5 which enlargement corresponds with
the size of the grate, the latter being fixed at this place by bars d or the like placed
beneath it.
When the apparatus shown in Figure 1 is in use, the tubes a forming a prolongation
of the heating chamber H are drawn out like a telescope. For transportation the
tubular pieces forming the said prolongation are slipped one into the other, as shown
in Figure 3, and the boiler is closed by means of the cover.
The fuel B is inserted, into the fire-place in the form of a cartridge or block, the
grate being previously moved aside for this purpose. When the grate is again
brought back to its position, the cartridge is lighted, and in, say about 15 minutes, the
liquid introduced into the boiler will begin to boil.
The heating chamber H can in some cases be enlarged as indicated in Figures 1 to 3
by dotted lines, so that it can serve as a magazine for carrying a quantity of fuel when
being transported.
Figure 5 shows a cooking apparatus where the heating space H is prolonged beyond
the cover by the application of one or more tubes b: During transportation the tube /
is removed from the chamber H and placed in the boiler, as indicated in dotted lines.
The apparatus represented in Figure 6 is arranged to be heated from either end.
For soups and the like the lower larger portion U can be used in the described manner.
When, however, only coffee, tea, or the like is to be boiled, the boiler is simply turned
over so that its smaller part B is downward. By turning the grate, its position is
correspondingly changed and the upper larger part U now serves as a cover.
This construction has the advantage that coffee and soups, for instance, can be
boiled in separate vessels so that the flavour of neither is affected.
Figure 7 shows the cooking apparatus arranged for use. It is here provided with an
eye by means of which it can be fastened to a stick or post forced into the ground or
in like manner to the sword or bayonet of a soldier.
F.
Although the improved cooking apparatus is principally designed for military pur-
poses it is also applicable for other purposes on account of its general usefulness and
the great saving of fuel. It is especially applicable for workmen who are generally
compelled to prepare their food and drink in the open air.
We would finally observe that in cases where rapid boiling or cooking is required
the apparatus can also be used in the ordinary manner upon the hearth or above an
open fire, the above mentioned cartridge B₁ being then unnecessary.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is-
First In portable cooking apparatus the heating chamber H open at the top and
bottom and provided with the grate e, the said heating chamber being arranged in the
interior of the apparatus in such a manner that it serves as a fire place, thus rendering
the arrangement of a special firing space below the boiler unnecessary.
Second In cooking apparatus of the class referred to in the first claiming clause,
the prolongation of the heating tube above the boiler to form a chimney, which is
composed either of tubes a adapted to be extended like a telescope, or of an indepen-
dent tube or tubes which can be fixed on to the heating tube.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicants.