| 摘要 |
A radiant electric heater ( 2 ) comprises a base ( 8 ) of insulation material having a surface supporting at least one electric heating ribbon element ( 10 ) supported on edge. A rod-like temperature-responsive device ( 16 ) extends lengthwise partly across the heater ( 2 ) from an edge and over the at least one electric heating element ( 10 ). The surface of the base ( 8 ) is provided with an elongate recess ( 22 ) with sloping sides ( 24, 26 ) extending beneath and along the length of the temperature-responsive device ( 16 ). The ribbon ( 10 ) is supported in and traversing the elongate recess ( 22 ) such that an upper edge ( 28 ) of the ribbon ( 10 ) substantially follows a contour of the surface of the recess. The upper edge ( 28 ) of the ribbon ( 10 ) at a region ( 30 ) underlying the temperature-responsive device ( 16 ) is provided at a predetermined distance from the temperature-responsive device ( 16 ) and is at a lower level relative to the upper edge ( 28 ) of the ribbon ( 10 ) at regions at either side of the elongate recess ( 22 ).
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