Year: 1888

page_text: I EUGEN COHN, Manufacturer, of 31 Elisabethstrasse, Berlin, in the Kingdom of
Prussia, and German Empire 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:-
Figure 1 shows a vertical section through the apparatus.
Figure 2 shows a view of the burner a from above.
Figure 3 shows a view of the lid for the lower vessel k from above.
The advantages of this improvement as compared with similar boiling or heating
apparatus hitherto known are:-
1. By means of the peculiar form of the burner a it is possible to distribute its
flame to two vessels in such a way that the whole body of flame is not (as would be
the case with all other burners) drawn into the passage of the lower vessel but both
the vessels are fully and entirely played on by the flames.
2. The arrangement and composition of the various parts of the apparatus is such
that an especially strong current of air sets into the passage of the lower vessel so
that a powerful inward heating is obtained for the lower vessel and a bigh rising
flame is obtained for the upper vessel.
3. Both vessels boil absolutely quicker than the lower vessel alone. If the valve
or cover o is closed for instance 4 cups of water boil in 6 minutes in the lower vessel
and with the valve or cover o open in 5 minutes. The heating of the upper vessel
therefore involves no loss of heat for the lower vessel but on the contrary produces
quicker boiling.

page_text: gure 17 Shows a burner consisting of the reservoir with a pipe c going
through the bottom of it. A four cornered cap d d placed above c has at the upper
part two apertures e through which a wick f in the space between d and e projects at
both ends, is a cylinder of gauze (advantageously brass gauze) and separates this
wick from the cap d d and has at its upper part a number (8) of apertures g g of
which some (4) ġ are on the outermost corners of the quadrilateral and the others
(4) g are about the middles of the 4 side surfaces of d. The latter apertures run
out into 4 little pipes g² as shown in Figures 2 and 2ª. On the reservoir 6 there
are also the funnels and the tripod i. The latter supports the lower vessel k
which has a passage penetrating one end and the lid or cover o on top thereof. This
vessel is closed by the lid m which has just beneath it the sliding filter floor or
strainer n and at the top the valve or cover o (which serves to close the passage 1)
and the tripod p. On p rests the upper vessel
Figures 4 to 6 show a modification of the apparatus which renders it possible
to pack all the parts in the upper vessel y¹.
Figure 4 is a part section.'
Figure 5 is a vertical section.
Figure 6 is a view of the packed apparatus from above.
In Figure 4 the burner a remains unchanged. In the vessel k¹ the upper part of
the tube or passage is so widened that the cap d' of the burner fits in it. The lid m
has two rings m² and m³ and has besides the cover o' and the filter or strainer n¹
and the bandles p' which take the place of a tripod for the vessel q¹. The slipping
of the handle pis-prevented by the projecting edge of the vessel g¹. The
object of the rings s on the bottom of is to do the-same for the lower vessel and
the tripod.
Figure 5 shows all the parts of the apparatus packed in the vessel q'. First of
all the vessel is put into q¹ on this the reversed burner a¹ is so placed that the cap d'
fits into the widened passage l'. The whole is covered up with the lid m¹ with its
rings m while the ring m³ closes the vessel when used in boiling. Figure 6
shows the whole looking from above.
The mode of working of the apparatus will easily be seen.
The fuel such as spirit
poured into the reservoir brises in the wick f. If now the spirit in the reservoir
is set alight the cap d and also the wick got heated and horizontal jets of flame
stream through the 8 apertures g and g₁ which jets consisting of a mixture of
combustible gases with the air streaming through the pipe c reach to the edge of the
reservoir b. Here they curve upwards and their ends strike against the bottom of
the lower vessel k. At the same time however the two wick flaines at the top have
become kindled and shoot in a vertical direction through the passage / against the
upper vessel 2.
The heating of the apparatus can also be effected by gas the burner a being
replaced by a gas tube which joins a burner formed like the cap d. Figure 7 being
a side view and Figure 7° a view from below of such an apparatus. This burner is
closed at its lower end t' and is provided with a joint pipe t.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. A double kettle or boiling apparatus whose burner a consisting of the parts
shown in Figures 1, 2, 2ª, distributes its flame to two vessels in such a way that the
flames of a wick frising through one or more passages of a lower vessel k stream
against an upper vessel q resting on a tripod p connected with a lid m of the lower
vessel while horizontal jets of Hame-which come out through apertures g and g¹
impinge upon the bottom of the lower vessel k substantially as set forth.
2. The double kettle or boiling apparatus above claimed modified so that the
passage is widened at the upper end in combination with the adjusting rings m²
and m³ fitted on the lid m' and the handles p p for the purpose of packing away

page_text: and easily carrying all the parts together in the upper vessel g' substantially as
set forth.
3. The modification of the cap d shown in Figures 7 and 7" by arranging a
bottom t provided with a joint pipe t for the purpose of heating the apparatus with gas
substantially as set forth.
4. The improved arrangement construction and combination of parts forming the
improved double kettle or boiling apparatus substantially as and for the purposes
herein before described.
1000