Residual heat indicator for ceramic hob cooking field for improved safety of operation

摘要

The indicator (1) uses a light signal source for providing a visual residual heat indication, and is positioned at the centre of the radiation heating element (4) located beneath the ceramic hob surface. The light signal source is contained in a light guide block (2) made of a transparent glass or plastics material, abutting the underside of the ceramic hob surface. The light source can be provided by a halogen lamp enclosed by a U-shaped light guide block.