Improved Receptacle for Articles of Food, applicable also as Cooking Utensil.
Year: 1891

page_text: Date of Application, 7th Aug., 1891
Complete Specification Left, 5th May, 1892-Accepted, 11th June, 1892
PROVISIONAL SPECIFICATION.
Improved Receptacle for Articles of Food, applicable also as
Cooking Utensil.
We, SARTORIUS RHEINHOLD, of Celle, and RUDOLF FISSLER, of Idar an der
Nahe, in the German Empire, Manufacturers, do hereby declare the nature of this
invention to be as follows:
This invention relates to an improved construction of receptacles for articles of
food which are surrounded by a covering formed of a bad conductor of heat.
It consists mainly in constructing the lower part of such receptacles in such a
manner that the non conducting envelope can be removed at will, so that the
exposed metal surfaces of the receptacle can be subjected to fire heat for the
purpose of cooking the food contained therein.
The upper part of the receptacle, thus converted into a cooking utensil remains
covered with the non conducting casing, whereby a more economical utilisation of
the fuel will be effected as the heat imparted to the vessel from the fire, after being
taken up by the bottom, sides, top and contents thereof, is, in ordinary cooking
vessels largely radiated from the outer metallic surfaces into the surrounding
atmosphere and lost, whereas with vessels of the above described construction such
radiation is effectually prevented by the protective covering, which thus acts
effectually under both the said applications of the vessel.
The accompanying drawings shew a receptacle for food constructed according to
the present invention.
Fig. 1 shews an elevation of the complete vessel,
Fig. 2 a plan,
Fig. 3 a vertical section with the lower part of the casing removed,
Fig. 4 a vertical section of such removed casing,
Fig. 5 shews a vertical section of a modified construction.
between
a is the upper part of the receptacle formed with double sides, the spaces
which are filled with a bad heat conductor e, the lower part of the receptacle
being formed of a single metal plate. When the receptacle is to be used as such for
the transport of hot food, the lower part is enclosed by the lower double casing c,
also filled with non conducting material e. This casing or cap e is preferably.
secured to the upper part by a bayonet fastening, which in the present case is
formed by two hooked projections o, which are passed through notches n on the
rim of the upper part and are then tuned so as to embrace the edge of the rim.
The cover d is also made hollow and filled with non conducting material e.
order to connect all the parts of the receptacle together in a secure but easily
detachable manner, the cap c as also the receptacle a are provided with hinged
loops p arranged vertically above and below the notches n, through which loops a
strap is passed so as to serve both as fastening and as a convenient handle for
carrying. In the drawing the strap is only shewn drawn through the upper
loops p, as the cap e is already securely attached by the bayonet joint.
In
The strap might however also be passed through the loops of the cap, so as to
secure this by a double fastening.
When the receptacle is to serve for the conveyance of articles of food, these can
be contained in any desired number of separate vessels (for example 3, as shewn at
Fig. 1) fitting into the receptacle so as to prevent them from shifting therein
transversely or longitudinally.
When the receptacle is to be used as cooking utensil, the cap c is removed,

page_text: whereupon the receptacle a can be placed with its metal bottom b on to a fire for
cooking food.
The casing to the upper part and the cover, containing the non conducting
material e which, as stated, remains attached to the receptacle during the cooking,
prevents the heat from being radiated from the sides and top of the receptacle, as
above described. By this means the requisite heat for cooking will be transmitted
to the contents of the receptacle through the bottom balone, in a comparatively
short time and with a small expenditure of fuel.
In the modification shewn at Fig. 5 the non conducting casings of both parts are
made removeable, so that the cooking utensil proper consists of a single walled
vessel a, which as shewn, may be advantageously separated from the sides and
bottom of the casing by a layer g of cloth or felt, whereby the heat is still further
retained. If the receptacle is to be used mainly as a cooking utensil, it is advisable
to make the casing of a size to it the receptacle without interposition of a layer of
cloth. When used for cooking, the casing or cap to the upper part is left on,
while that of the lower part is removed and only the metal bottom of the receptacle a
is subjected to heat. The whole of the sides of the receptacle being in this case
protected by the casing, the heat is still more effectually retained therein during
the cooking. The casing of the upper part is provided at bottom with a ring of
asbestos confined between two perforated plates, which protects the non-
conducting material in the casing from the fire heat. If the receptacle is also to
serve for conveying food, the bottom cap e is fixed on by any suitable fastening,
such as a bayonet joint, so that the receptacle is now enclosed on all sides with non
conducting material. Any suitable material that is a bad conductor of heat and
that will withstand high temperatures to a sufficient extent may be used for the
filling of the casings. Infusorial earth has been found suitable for this purpose;
also slag or glass wool, powdered clay, or pulverised refractory silicates or metallic
oxides may also be used.
Dated this 7th day of August 1891
COMPLETE SPECIFICATION.
· Improved Receptacle for Articles of Food, applicable also as
Cooking Utensil.
We, SARTORIUS RHEINHOLD, of Celle, and RUDOLF FISSLER, of Ider an der
Nahe, in the German Empire, Manufacturers, 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 relates to an improved construction of receptacles for articles of
food which are surrounded by a covering formed of a bad conductor of heat.
It consists mainly in constructing the lower part of such receptacles in such a
manner that the non conducting envelope can be removed at will, so that the
exposed metal surfaces of the receptacle can be subjected to fire heat for the purpose
of cooking the food contained therein.
The upper part of the receptacle, thus converted into a cooking utensil remains
covered with the non-conducting casing, whereby a more economical utilisation of
the fuel will be effected as the heat imparted to the vessel from the fire, after being
taken up by the bottom, sides, top and contents thereof, is, in ordinary cooking
vessels largely radiated from the outer metallic surfaces into the surrounding
atmosphere and lost, whereas with vessels of the above described construction such
radiation is effectually prevented by the protective covering, which thus acts
effectually under both the said applications of the vessel.
The drawings accompanying our Provisional Specification shew a receptacle for
food constructed according to the present invention.

page_text: Fig. 1 shews an elevation of the complete vessel,
Fig. 2 a plane,
Fig. 3 a vertical section with the lower part of the casing removed,
Fig. 4 a vertical section of such removed casing,
Fig. 5 shows a vertical section of a modified construction.
a is the upper part of the receptacle formed with double sides, the spaces
between which are filled with a bad heat conductor e, the lower part of the
receptacle being formed of a single metal plate. When the receptacle is to be
used as such for the transport of hot food, the lower part is enclosed by the
lower double casing c, also filled with nonconducting material e. This casing or
cap c is preferably secured to the upper part by a bayonet fastening, which in the
present case is formed by two hooked projections o, which are passed through
notches on the rim of the upper part and are then turned so as to embrace the
edge of the rim.
The cover d is also made hollow and filled with non conducting material e. In
order to connect all the parts of the receptacle together in a secure but easily
detachable manner, the cap e as also the receptacle a are provided with hinged
loops p arranged vertically above and below the notches n, through which loops a
strap is passed so as to serve both as fastening and as a convenient handle for
carrying. In the drawing the strap is only shewn drawn through the upper loops p,
as the cap c is already securely attached by the bayonet joint.
The strap might however also be passed through the loops of the cap, so as to
secure this by a double fastening.
When the receptacle is to serve for the conveyance of articles of food, these can
be contained in any desired number of separate vessels (for example 3, as shewn at
Fig. 1) fitting into the receptacle so as to prevent them from shifting therein
transversely or longitudinally.
When the receptacle is to be used as cooking utensil, the cap c is removed,
whereupon the receptacle a can be placed with its metal bottom b on to a fire for
cooking food.
The casing to the upper part and the cover, containing the nonconducting
material e which, as stated remains attached to the receptacle during the cooking,
prevents the heat from being radiated from the sides and top of the receptacle, as
above described. By this means the requisite heat for cooking will be transmitted
to the contents of the receptacle through the bottom balone, in a comparatively
short time and with a small expenditure of fuel.
In the modification shewn at Fig. 5 the non-conducting casings of both parts
are made removeable, so that the cooking utensil proper consists of a single walled
vessel a, which as shewn may be advantageously separated from the sides and
bottom of the casing by a layer g of cloth or felt, whereby the heat is still further
retained. If the receptacle is to be used mainly as a cooking utensil, it is advisable
to make the casing of a size to fit the receptacle without interposition of a layer of
cloth. When used for cooking, the casing or cap to the upper part is left on, while
that of the lower part is removed and only the metal bottom of the receptacle a is
subjected to heat. The whole of the sides of the receptacle being in this case
protected by the casing, the heat is still more effectually retained therein during
the cooking. The casing of the upper part is provided at bottom with a ring of
asbestos confined between two perforated plates, which protects the non-
conducting material in the casing from the fire heat. If the receptacle is also to
serve for conveying food, the bottom cape is fixed on by any suitable fastening
such as a bayonet joint, so that the receptacle is now enclosed on all sides with
non-conducting material. Any suitable material that is a bad conductor of heat
and that will withstand high temperatures to a sufficient extent may be used for
the filling of the casings. Infusorial earth has been found suitable for this purpose;
also slag or glass wool, powdered clay, or pulverised refractory silicates or metallic
oxides may also be used.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
1. A receptacle for conveying articles of food, serving also as cooking utensil,
consisting of a receptacle arranged for containing any number of vessels, which is
made with double walls at the upper part, the space between which is filled with a
bad conductor of heat, while the single metal walls of the lower part are enclosed
by a hollow cap c also filled with non-conducting material, and which is secured to
the receptacle by a suitable fastening or fastenings in such manner that when the
said cap is fixed on, the vessel serves for conveying and preserving food, while when
the cap is removed the receptacle can be used as a cooking utensil, substantially as
described.
2. The modified construction of the apparatus referred to in the preceding claim,
wherein the upper part of the receptacle is also provided with a hollow removeable
non-conducting casing forming also the insulating covering for the top, such casing
being extended downwards so as to be about flush with the bottom of the receptacle,
the latter being enclosed by a separate non-conducting cap e in order to prevent
radiation of heat from the receptacle, substantially as described.
Dated this 5th day of May 1892.
ABEL & IMRAY,
Agents for the Applicants.