Year: 1888

page_text: I, OSCAR JULIUS NIELSEN, of 7 Skippergaden Christiania, in the Kingdom of
Norway, Wholesale Merchant, 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:-
My invention relates to cooking vessels with double bottoms, and it comprises the
improvements hereinafter described.
In the accompanying drawing
Figure 1 is a sectional elevation of a vessel constructed according to my invention,
and
Figure 2 is a view of the same partly from above and partly from below.
Similar letters of reference indicate corresponding parts in all the figures.
The apparatus consists chiefly of two parts of which a is the cooking vessel proper
and b is an outer vessel into which the vessel a fits.
The inner vessel a is made of tinned iron or copper, or other suitable material, and
provided with a cover c, handles d, ears e for the fastening of the spiral spring fand
at a rim g bent into the shape of a lip and running round the cooking vessel a.
The outer vessel bis wider than the inner vessel a, in order to furnish room for an
asbestos-lining, and a layer i of sand or other suitable material. The bottom of the
vessel b is formed of separate rings k recessed so as to fit into each other to form an
even surface like the rings of a kitchen range, and those rings are further provided with
openings 1.
The upper edge of the vessel b is shaped into a hollow brim so that the apparatus is
able to rest in the top plate of the kitchen range. The upwardly-bent upper part of
this hollow brim is made to fit into the above mentioned lip-shaped rim y and is
attached to the above mentioned spiral springs f to keep the two vessels a and b
together.
By the arrangement of the vessels as above described and the filling of the inter-
mediate space between them with asbestos and sand the sticking and thereby the
burning of the ineat or other contents is obviated. Also the stirring of the contents

page_text: is useless on account of the cooking vessel proper not being directly exposed to the
fire in the heat being transmitted from the outer vessel through the asbestos-lining and
sand-layer to the inner vessel.
In order to produce ventilation in the packing in the intermediate space between the
two vessels, the rings forming the bottom of the outer vessel are provided with the
ahove mentioned openings. The object of the lip-shaped rim g is to prevent water or,
other fluid from oozing down into the vessel b and destroying the packing.
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 cooking vessel, the arrangement of two vessels one of which is placed inside
the other, the intermediate space between them being filled or packed with asbestos
and a layer of sand or other suitable material and the outer vessel provided with
openings for the ventilation of the packing.
2. In a cooking vessel of the kind mentioned in claim 1, the connection of the vessels
by spiral springs f, for the purpose specified.
3. In a cooking vessel of the kind mentioned in claim 1, providing the inner vessel
with a lip-shaped rim g for covering the upwardly bent edge of the hollow brim of the
outer. vessel, for the purpose specified.
4. The improved cooking vessel constructed and arranged substantially as herein-
before described and illustrated in the accompanying drawings.
TOLL
T..1 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.