Abstract: The invention relates to a cleaning apparatus with a filter device. The filter device contains a ceramic filter equipped with a heating device. The heating device serves for thermal sterilisation of the ceramic filter, by which allergenic substances are destroyed.

Abstract: The invention relates to a cleaning apparatus with a filter device. The filter device contains a ceramic filter equipped with a heating device. The heating device serves for thermal sterilisation of the ceramic filter, by which allergenic substances are destroyed.

Abstract: The undervoltage tripping device has an electromagnet with a magnet winding (3), a core (10) and an armature (20) and a tripping member (50) able to perform a tripping movement. In the ready-to-trip state the armature is in an attracted position on the core, is spring loaded in the dropping direction, but is prevented from dropping from the core by the magnetic force of attraction produced by the electromagnet. The tripping member is also spring loaded in this state, but is prevented from performing the tripping movement by the attracted armature. The electromagnet is a d.c. magnet. A rectifier is provided for rectifying the current flowing through magnet winding. Mechanical aids are provided for feeding the armature into the attracted position. The tripping member is latched in self-release manner in the ready-to-trip state. The latching effect is released when the armature drops.

Abstract: A contact lever has a contact point on one end for a fixed contact element and is supported on its other end on a pin which, when the switch is tripped, is capable of moving along a path transversely to the longitudinal direction of the contact lever. A compression spring acts upon the contact lever between a stop for the contact lever, which is embodied by a housing element and the pin in order to generate the contact pressure to move the pin upon the tripping of a switch. The stop has two protrusions, oriented towards the contact lever, one of which is located farther from the pin and closer to the contact lever than the other. The contact lever, therefore, upon being tripped, pivots first about the protrusion, which is more remote from the pin being moved, and then about the protrusion disposed closer to the pin.