(57) A heating device, e.g. a heating element for a kettle, comprises a heating element
(3) including a resistance heating wire (4) surrounded by and electrically insulated
from a metal sheath (5), the heating element (3) being carried directly or indirectly
on a metal base plate (1) for transferring heat from the heating element (3) to a
medium to be heated by the device, wherein the heating element (3) is in thermally
conductive communication with the base plate (1) via a heat diffusion layer (2), wherein
the heat diffusion layer (2) is of a metal comprising copper. In preferred embodiments
an underside of the heating element (3) contacts, or is directly attached to, the
metal base plate (1) and the heat diffusion layer (2) wholly or partially overlies
the heating element (3), or alternatively the heating element (3) is attached to the
heat diffusion layer (2) which is in turn attached to the base plate (1).
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