Abstract: The electric heater for clothes drying devices, object of the present invention, does not require the large dimensions currently required to provide high powers. Moreover, the particular shape of the resistive element reduces the vibrations transmitted to the apparatus and, therefore, the noise perceived by the user. The particular zigzag shape of the heater determines a lesser tendency for dust to be deposited on the heating element and increases safety against short circuits in case of filament breaking and/or wire deformation occurring when the same is subjected to high operating temperatures.

Abstract: The electric heater for tumble dryer devices, object of the present invention, does not need the large size presently required to provide high powers. Furthermore, the particular shape of the resistive member reduces the vibrations transmitted to the apparatus and therefore the noise felt by the user. The particular shape of the heater determines a lower tendency to dust deposition on the heating member and a higher safety against short circuits in case of filament breakage.

Abstract: A resistance heater element for an electric room heater includes a resistive heating conductor (1) supported by an insulating support (2) mounted on the support flange (9) of an electric fan (4) in the heater which passes a stream of room air across the conductor (1). The insulating support (2) is cylindrical, with its axis parallel to the direction of the air stream, and includes at least one pair of nested mica bands (5, 5') bound together by fillets (6) connected to the support flange (9). The heating conductor (1) comprises at least one wire of resistive material bent in a zig-zag manner to form a plurality of radial loops each having portions extending inwardly and outwardly of the cylindrical bands (5, 5'). The central portion (11) of each loop is bent over and retained between the pair mica bands (5, 5') with the inner portion of each loop emerging radially from the inner band (5) through apertures (13) provided therein.