Year: 1894

page_text: Date of Application, 19th Dec., 1894
Complete Specification Left, 19th Sept., 1895-Accepted; 19th Oct., 1895
I OTTO HURSCHMANN, Manufacturer, of 39 Westkotterstrasse Barmen, in
the Empire of Germany, do hereby declare the nature of this invention to be as
follows:-
":
:
The apparatus consists of a cooking apparatus heated by spirit and which by
means of the spirit being heated to a high temperature before combustion effects
on the one hand the development of a very high heating power and on the other
hand the complete combustion of the spirit even when the latter is mixed with
water. By these means not only is the fuel economised but the unpleasant
vapour which arises from the combustion of artificial spirit is prevented.
The fuel is contained in a holder at a sufficient distance from the burner to be safe
against the heat given out from the latter. From the holder the spirit flows
through a pipe (which may be provided with a stop cock) into a vaporising
chamber forming part of the burner case or in direct contact therewith. From
the vaporising chamber the fuel passes through a tube running over the burner to
the gas outlet at the upturned end of this tube which is widened outwards to a
funnel shape and forms a seat for the point of a pin valve. This valve is carried
through a tube passing straight through the vaporising cliamber and is provided
partially with a female thread in which rotates the thread of the valve spindle.
In the spirit conducting tube is an insertion consisting of wire spirally wound
with a loop at each end and in the centre. One half of the wire is surrounded
with a fine porous wire netting whilst the other half carries any required number
of threads. This insertion serves the purpose of effecting, by means of the
threads, a continual flow of the spirit whilst the winding of wire netting serves to
separate the spirit in the smallest possible atoms and to thus facilitate its
vaporisation.
The end of the spirit conductor is opened and closed by a screw. The double
advantage of this is that first the cleaning of the tube is very conveniently effected
and secondly the fitting of the insertion is facilitated.
Dated this 19th day of December 1894.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.
Improvements in Spirit Cooking Stoves.
1 OTTO HURSCHMANN, Manufacturer, of 39 Westkotterstrasse, Barmen, 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 ascertained in
and by the following statement:-
This invention consists essentially in the use of a regulating valve on the gas
outlet opening and also in the arrangement and construction of a removable
vaporising chamber and utensil stand.
In the accompanying sheet of illustrative drawings,
Fig. 1 is a sectional elevation of the whole apparatus ;

page_text: Fig. 2 shows an arrangement of regulating valve;
Fig. 3 a perspective view of the vaporising chamber;
Fig. 4 a sectional elevation of the vaporising chamber with the valve ;
Fig. 5 a plan of the apparatus ;
Fig. 6 a plan of the utensil stand and Fig. 7 section in perspective of same.
Fig. 8 represents a plug for regulating the flow of spirit in supply tube.
The apparatus consists of a cooking or heating apparatus heated by spirit in
which by reason of the spirit being vaporised by heating at a high temperature
before combustion, a very high heating power is produced and also complete
combustion of the spirit fuel is obtained.
The fuel reservoir t is placed at such a distance from the burner that it is
protected from the heat radiating therefrom. The spirit flows out of the reservoir
through a tube a into the vaporising chamber b and through the small tube c
leading over the burner towards the gas outlet opening d in the bent over end of
the tube c.
This opening is coned to form the seating for the point of the valve e
(Fig. 2). The valve spindle e is screw threaded and passes through a small tube f
in the vaporising chamber the said tube f forming a nut in which the valve
spindle works.
The spirit conducting tube a is provided with a cap 9 which may be unscrewed
in order to introduce a plug Fig. 8 for regulating the flow of the spirit. This
plug consists of a spirally formed wire in the spirals of which cotton wool fibre,
hair or asbestos threads or threads of any other suitable material are twisted.
The vaporising chamber b, the lugs h of which serve to receive the fastening
screws or bolts is also provided on one side with the hollow support i into which
the spirit conducting tube a enters and which is opened out at its point of entry
for the delivery of the spirit into the vaporising chamber. The gas outlet pipe c
is screwed in the threaded hole k in the cover of the vaporising chamber. The
flame spreader is provided with air inlet openings m. The safety casing n is
separated from the vaporising chamber and firmly connected to the stand.
The utensil stand made in one piece and secured by screws bolts or other
suitable means and shown in Figs. 1,6 and 7 consists of the two rings o and p
connected together by supports 9. Between the supports 9 other strips r are
arranged which, connecting the two rings o and p, project past the inner ring p so
that they form a stand within the small ring p. The number and form of the
supports and strips may be as desired.
In order to ignite the apparatus the valvo e is opened wide enough for the spirit
to drop out of the smali tube c through the opening & and flow into the pan s under
the burner, where the spirit is ignited and heats the burner c together with
vaporising chamber and the tube a to such a degree that after a short time only
vaporised spirit under pressure flows out of the opening d and, whilst burning,
strikes against the surface of the vaporising chamber where the flame rises upward
and first heats the small tube c to a high degree, the heat being then transmitted
to the utensil stand and to any cooking or heating utensils placed thereon.. By
means of the valve the flame can be regulated at will to any degree.
Cleaning is effected as follows.
h
The fastenings of the attachment lugs are loosened, the needle valve e screwed
out or removed, the cap g on the supply pipe a opened and the vaporising
chamber removed and gas outlet pipe c screwed off. An inlet is thus opened
into the vaporising chamber through the support i and the screwed opening & and
the chamber may be cleaned of any impurities by means of water and a brush, and
the gas outlet pipe is cleaned in the same manner.
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. In a spirit cooking or heating apparatus in which the fuel is vaporised in a
vanorising chamber 6 and made completely gaseous in a small tube e exposed to

page_text: the burner flame, the arrangement of the valve e in such manner that it enters or
covers the gas outlet opening from the outside and thus opens or closes it and so
regulates the flame substantially as described, for the purpose set forth.
2. A cooking or other utensil carrier consisting of one piece and secured by
screws bolts or other means. one part of the stays connecting the outer and inner
rings also acting as supports for the whole carrier whilst the other part projects so
far within the small ring that a carrier for sinall vessels is formed.
3. In spirit cooking or heating apparatuses the arrangement of a removable
vaporising chamber which is secured to the spirit gas apparatus separately from
the safety casing characterised by a clear way through the vaporising chamber
being created for cleansing purposes by removing the gas outlet pipe and spirit
supply pipe and by the flame spreader being provided with air inlet openings.
4. The arrangement and construction of spirit cooking stoves substantially as
described with reference to the drawings.
Dated this 19th day of September 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.