IMPROVEMENTS IN STEAM COOKING VESSELS.
Year: 1881

page_text: LETTERS PATENT to Moriz von Zyka-Radvanszky, Gentleman, Gustaf Liedman,
Gentleman, and Friedrich Wilhelm Scharrath, Engineer, of the City of
Berlin, in the Kingdom of Prussia, German Empire, for an Invention of
PROVISIONAL SPECIFICATION left by the said Moriz von Zyka-Radvánszky,
Gustaf Liedman, and Friedrich Wilhelm Scharrath at the Office of the
Commissioners of Patents on the 23rd April.1881.
MORIZ VON ZYKA-RADVANSZKY, Gentleman, GUSTAF LIEDMAN, Gentleman, and
FRIEDRICH WILHELM SCHARRATH, Engineer, of the City of Berlin, in the Kingdom
of Prussia, German Empire. "IMPROVEMENTS IN STEAM COOKING VESSELS.'
The Invention relates to apparatus for cooking food and drinks by means of
steam, whether in an oven, at an open fire, by petroleum spirit, or otherwise.
The apparatus consists of an outer vessel, which may be of an oval form flattened
on one side; this form is suitable for field cooking vessels or utensils for military
purposes, but other forms may be substituted at pleasure.
In the outer vessel is contained an inner one with a cover which serves also for
the whole cooking vessel. The outer vessel also contains a grating or sieve with a
wire handle. Two connecting rods are fastened by hinges to the upper part of the
apparatus, their upper ends take into and turn in eccentrics, and being connected
together by a bow or handle form therewith a jointed lever.
The two eccentrics can be pressed on to bearings, discs, or plates on the cover
by turning the aforesaid bow or handle, thus effecting the closing of the vessel,
which becomes tighter as the metal of the apparatus expands by the heat of
cooking, notwithstanding which an explosion of the apparatus is impossible, because
the cover is only pressed on to the top rim in two places, all the rest of its
periphery allowing of the escape of the superfluous steam.
The inner vessel terminates at the bottom in a circular or tubular prolongation,
which may be closed by a plug of any suitable material.
The use and manipulation of the apparatus is as follows:-
The outer vessel is filled with water to a height sufficient to cover slightly the

page_text: grating or sieve, and the vegetables, such as pulse or potatoes, are heaped up
thereon.
The meat to be cooked is placed in the inner vessel, which forms with the
aforesaid lid a vessel of variable height, according as it is pushed more or less
deeply into the said lid. The apparatus is then closed by placing the eccentrics
upright by means of the bow or handle, and is applied to the fire.
The small quantity of water at the bottom is rapidly evaporated, the steam rises
first through the substances on the grating or sieve, then through the inner vessel
to cook the meat, or if the inner vessel is closed by the aforesaid plug it passes
from below the closed meat container between the inner periphery of the outer
vessel and the outer periphery of the inner one, and stews the contents of the
latter in its own gravy without taking from it any of its nourishing properties.
The steam finally escapes round the rim of the cover.
In a similar manner tea and coffee can be made in the outer or inner vessel without
losing their aroma, which has not been possible in the field cooking pots heretofore
in use.
The cover or the inner vessel when the latter is closed by the plug is
suitable for use as a drinking cup.
A fork and spoon suitable for use with this apparatus may be adapted so as
to be easily connected together by pushing a cramp-like hook rivetted to the
underside of the handle of the fork into a notch formed in the handle of the
'spoon.
The fork has under its prongs two other similar hooks, the three hooks forming
together an arrangement by which the cover and inner vessel can be taken hold
of and lifted off by the projecting rim of the cover.
Should it become necessary to interrupt the cooking suddenly the whole apparatus
with its contents may be closed up by turning down the bow or handle, and be
thereby made transportable on the knapsack or otherwise without damaging or
endangering the contents.
The peculiar construction of the apparatus also renders it possible to cook during
.transport, for example, to a distant work place, in which case a heating apparatus
is placed under the vessel, and the whole carried in a cage of wire grating.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Moriz von Zyka-Radvánszky, Gustaf Liedman, and Friedrich
Wilhelm Scharrath in the Great Seal Patent Office on the 12th September
1881.
MORIZ VON ZYKA-RADVANSZKY, Gentleman, GUSTAF LIEDMAN, Gentleman, and
FRIEDRICH WILHELM SCHARRATH, Engineer, of the City of Berlin, in the Kingdom
of Prussia, German Empire. "IMPROVEMENTS IN STEAM COOKING VESSELS."
The Invention relates to apparatus for cooking food and drinks by means of
steam, whether in an oven, at an open fire, by petroleum spirit, or otherwise.
The Drawing hereto annexed shows to half full size a cooking apparatus of
tinned sheet iron or other suitable material, which, by reason of its peculiar
construction renders it possible to cook completely in from 20 to 25 minutes, with
an extremely small consumption of water and fuel, a meal of meat and vegetables
sufficient for one man. Fig. 1 of the Drawing shows the cooking apparatus in
vertical section; Fig. 2 in side view. The apparatus consists of an outer vessel,
which may be of an oval form flattened on one side; this form is suitable for field
cooking vessels or utensils for military purposes, but other forms may be substituted
for it at pleasure. In the outer vessel C is contained an inner one E with a cover B,
which serves also for the whole cooking vessel. The outer vessel C also contains a
grating or sieve S with a wire handle ƒ (see also Fig. 3).
Two connecting rods a, a, Fig. 2, are fastened by hinges to the upper part of
the apparatus; their upper ends take into and turn in eccentrics d, d, and being
connected together by a bow or handle b form there with a jointed lever.
The two eccentrics d, d, can be pressed into bearing discs or plates c, c, on the
cover B (see also Fig. 6) by turning the aforesaid bow or handle b, thus effecting
the closing of the vessel, which becomes tighter as the metal of the apparatus
expands by the heat of cooking, notwithstanding which an explosion of the
apparatus is impossible, because the cover is only pressed on to the top rim in two
places, all the rest of its periphery allowing of the escape round it of the superfluous
steam.
The inner vessel E terminates at bottom in a circular or tubular prolongation c,
which may be closed by a plug p of any suitable material.
The use and manipulation of the apparatus is as follows:-The space c' of the
outer vessel is filled with water to a height sufficient to cover slightly the grating
or sieve S, and the vegetables, such as pulse or potatoes, for example, are placed
thereon. The meat to be cooked is placed in the inner vessel E, which forms, with
aforesaid lid B, a vessel of variable height according as it is pushed more or less
deeply into the said lid. The apparatus is then closed by placing the eccentrics d, d,
upright by means of the bow or handle b, and is applied to the fire. The small
quantity of water at the bottom is rapidly evaporated, the steam rises first through
the substances on the grating or sieve S, then through the inner vessel E, B, to
cook the meat, or if the tubular prolongation e of the inner vessel is closed by the
aforesaid plug p it passes from below the closed meat container E, B, between the
inner periphery of the outer vessel C and the outer periphery of the inner one E, B,
and stews the contents of the latter in its own gravy without taking from it any of
its nourishing properties.
The steam finally escapes round the rim of the cover B. In a similar manner
tea and coffee can be made in the outer or inner vessels without losing their aroma,
which has not been possible in the field cooking pots heretofore in use; the cover B
or the inner vessel E, when the latter is closed by the plug p is suitable for use as
a drinking cup.
A fork G, Fig. 4, and spoon L, Fig. 5, suitable for use with this apparatus may
be adapted so as to be easily connected together by pushing a cramp like hook n
rivetted to the under side of the handle of the fork into a notch m formed in the
handle of the spoon. The fork G has under its prongs two other similar hooks n¹, n¹,

page_text: the three hooks n, n¹, n¹, forming together an arrangement by which the cover B
and inner vessel E can be taken hold of and lifted off by the projecting rim of the
cover B (see Fig. 6).
Should it become necessary to interrupt the cooking suddenly, the whole
apparatus, with its contents, may be closed up by turning down the bow or
handle into the position shown in dotted lines in Fig. 2, and be thereby made
transportable on the knapsack or otherwise without damaging or endangering the
contents.
The peculiar construction of the apparatus also renders it possible to cook during
transport, for example, to a distant work place, in which case a heating apparatus
is placed under the vessel, and the whole carried in a case or cage of wire
grating.
Having now described the nature of the said Invention, and the manner in
which the same is to be carried into effect, we would have it understood that we
do not confine ourselves to any particular material, form, or size in the construction
of the cooking apparatus, as they may be varied without departing from our
Invention, but what we do claim is,―
First. The jointed lever for closing the apparatus, composed of the connecting
rods a, a, the eccentrics d, d, and the bow b, which may be employed in two
various positions, as hereinbefore described and illustrated in Fig. 1 & 2 of the
Drawings.
Second. The peculiar arrangement of this closing device, whereby during the
cooking it only acts on the two points c, c, and thereby renders possible the use of
high pressure steam without danger of explosion, the superfluous steam escaping
round the remaining part of the periphery of the rim of the cover, as hereinbefore
described and illustrated in Fig. 1, 2, & 3 of the Drawings.
Third. The vessel composed of the cover B, and the inner vessel E, which latter
may be closed up by the plug p at will, and which is adjustable vertically in the
cover B, as hereinbefore described and illustrated in Fig. 1 of the Drawings.
Fourth. The employment in cooking apparatus of the kind herein-referred to, of
the grating S for separating the water from the contents to be cooked, as herein-
before described and illustrated in Figs. 1 & 3 of the Drawings.
Fifth. The arrangement of hooks n, n', n', which as well as forming a convenient
connection of the spoon L with the fork G, also makes the fork useful and
applicable as a handle for the cover b and the vessel B, E, as hereinbefore described
and illustrated in Figs. 4, 5, & of the Drawings.
Sixth. The steam cooking vessel or apparatus arranged, constructed, and
combined, as herein before described and illustrated in the Drawings hereto
annexed.
In witness thereof, we, the said Moriz von Zyka Radvanszky, Gustaf Liedman,
and Friedrich Wilhelin Scharrath, have hereunto set our hands and seals,
this Thirtieth day of August, in the year of our Lord One thousand eight
hunduad and
Witness,
MORIZ VON ZYKA RADVANSZKY.
GUSTAF LIEDMAN.
(L.S.)
(L.S.)
FRIEDRICH WILHELM SCHARRATH. (L.S.)
LORENTZ ALBERT GROTH,
Proprietor of the Scandinavian Patent Office,
No. 97, Finsbury Pavement,
London, E.C.