Year: 1897

page_text: I, WILHELM KNOPF, of 198 Oranien Strasse, Berlin, in the Empire of Germany,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
The spirit stove forming the subject of this invention is characterized by a special
admission of hot air to the surface of the spirit, so that the flame will be developed
on leaving the burner tube and can therefore be used at its full power for boiling or
heating purposes.
The stove comprises a spirit vessel which terminates above in the short cylindrical
burner tube and is carried by three feet one of which may at the same time be made
in the form of a handle. The cylindrical part has three openings uniformly
distributed over the periphery, such openings being covered by an annular slide when
this slide is in a certain position. When however the slide is moved in a
predetermined direction by a handle the corresponding openings in the slide uncover
the before-mentione.l openings in the cylindrical part and air can enter and pass to
the surface of the spirit. By a cap, which at the same time shuts off the cylindrical
part at the top, the air is compelled to pass first to the edge of the surface of the
spirit, and then escape through the burner tube together with the spirit gases
upwards as a flame, so that the air will come as completely as possible in contact
with the surface. Owing to the fact that the fresh air is preliminarily heated to a
high degree in contact with the hot internal cap the combustion will be considerably
increased.
It is not necessary that there should be just three openings for the admission of
air, the number being optional. For instance there may be only one opening in
the annular slide and a corresponding opening in the burner tube without giving rise
to any essential change in the effect. In case there is only one opening I may use,
in lieu of an annular slide, a simple slide, cap, valve or the like. Further, the lower
edge of the internal cap may be of different shape, for example the cap may extend
as far as the wall of the vessel, over about half the periphery, so that the air will pass
only at the uncovered other half of the periphery to the surface of the spirit; and
the cap may have several openings instead of this single opening for the passage at
the edge.
By appropriately displacing the slide, or by other devices for adjusting the air
admission openings, the size of the flame may be regulated or decreased to such an
extent that it can be easily extinguished, for instance by putting on a cover. In lieu
of spirit I may use any other similar fuel.
1004

page_text: I, WILHELM KNOPF, of 198 Oranien Strasse, Berlin, in the Empire of Germany,
Manufacturer, 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 :—
The spirit, stove forming the subject of this invention is characterized by a special
admission of hot air to the surface of the spirit, so that the flame will be developed
on leaving the burner tube and can therefore be used at its full power for boiling or
heating purposes, and is illustrated in the accompanying drawing in which
Figure 1 is a transverse section through the stove;
Figure 2 is a section taken on the line xx Figure 1;
Figure 3 shows a modification of the internal cap, and
Figure 4 represents a section taken on the line y-y Figure 3, as seen from below.
Figure 5 represents a handle for singeing or curling tongs and the like.
The stove comprises a spirit vessel which terminates above in the short
cylindrical burner tube band is: supported by three feet one of which may at the
same time be made in the form of a handle. The cylindrical part or tube b is
provided with three openings c uniformly. distributed over the periphery, such
openings being. covered by an annular slide d when this slide is in the position shown
in Figure 2. "When however the slide is moved to the position by the handle fas
indicated in dotted lines, the corresponding openings in the slide uncover the
before-mentioned openings c in the cylindrical part and air can enter in the direction
indicated by the arrows in Figure 1, and pass to the surface of the spirit.
By means of a cap g which at the same time closes the cylindrical part b at the
top, the air is compelled to pass first to and over the surface of the spirit and then
escape through the burner tube together with the spirit gases upwards as a flame,
so that the air will come as completely as possible in contact with the surface.
Owing to the fact that the fresh air is preliminarily heated to a high degree in contact
with the hot internal cap g the combustion will be considerably increased.
It is not necessary that there should be only three openings for the admission of
air, the number being optional. For instance in the modified arrangement shown in
Figures 3 and 4 there is only one opening c in the annular slide and a corresponding
opening e in the burner tube without giving rise to any essential change in the effect.
In case there is only one opening I may use, in lieu of an annular slide, a single
slide, cap, valve or the like. Further, the lower edge of the internal cap g may be of
different shape, for example the cap may extend as far as the wall al of the vessel, as
shown in Figures 3 and 4, over about half the periphery so that the air will pass only
at the uncovered' other half of the periphery to the surface of the spirit. If necessary
the cap may have several openings instead of this single opening for the passage at
the edge.
By appropriately moving the slide d, or by other devices for adjusting the air
admission openings ce, the size of the flame may be regulated or decreased to such an
extent that it can be easily extinguished, for instance by putting on a cover m
(Figure 1). In lieu of spirit I may use any other similar fuel.
The liquid in the vessel must not reach beyond the wire (Figure 1), otherwise
the air would be prevented from passing along the bottom edge of the. cap g. In
order to prevent any excessive amount of liquid being supplied and to further provide
that the liquid be always kept at this level, the said wire is provided, which for the
sake of simplicity is fixed by tightly jamming the same between the vessel a and the
upper part a¹, before the fold between a and a¹ is pressed down. When the vessel a

page_text: is empty, or in case the half-empty vessel is being re-filled, the supply of fuel must
be at once stopped when the liquid has reached the wire k. In place of the wire ka
sheet metal piece may be likewise employed; and the method of fastening the said
wire or sheet metal piece may also vary from that represented.
Figure 5 represents an accessory part of the stove and serves for conveniently
holding small objects, such as singeing or curling tongs, required to be heated. This
handlen consists of a piece of sheet metal cut in triangular shape, turned up at its
edges, and provided with a loop o to slide over one of the arms 11 of the legs or
supports h. The singeing or curling tongs or other article may then be conveniently
held so as to enable the flame of the stove to come into suitable contact therewith.
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 spirit stove having a burner tube b and an internal cap ġ provided therein for
the purpose of admitting air to the surface of the spirit through one or more
openings cand e adapted to be adjusted by means of a slide d or other device.
2. In the apparatus as set forth in the first claim, the arrangement of a piece of
wire or similar indicating medium k for controlling the level of the liquid.
3. In the apparatus as set forth in the first claim a sheet metal piece n adapted to
be slid upon the arm h¹ to enable singeing or curling tongs or other articles to be
conveniently held.
day of Tun 1905
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.