Patent ID: 6376810
Filing Date: 2002-04-23
Classification: H05B

Abstract:
A radiant electric heater comprising:a base of thermal insulation material having supported relative thereto at least two concentrically-arranged heating elements separated by a dividing wall of thermal insulation material to form an outer heating zone and an inner heating zone, the heater having a peripheral wall of thermal insulation material; a tunnel formed of thermal insulation material extending between the peripheral wall and the dividing wall across the outer heating zone; a rod-like temperature-responsive device extending from a periphery of the heater through the tunnel and at least partly across the inner heating zone, through an aperture provided in the dividing wall; at least one end portion of at least one heating element of the inner heating zone extending along the tunnel; a terminal block located at the periphery of the heater, the at least one end portion of the at least one heating element of the inner heating zone and at least one end portion of at least one heating element of the outer heating zone being electrically connected to terminals provided in the terminal block; and an elongate electrically conductive link having a first end electrically connected to, or comprising, one of the terminals and extending to bridge, whilst being electrically insulated from, an end portion of the at least one heating element of the outer heating zone electrically connected to another terminal, the link being profiled such that a second end thereof is located within the tunnel and electrically connected to an end portion of the at least one heating element of the inner heating zone.