Abstract: A hand held device for providing local irradiation with visible or invisible light to defined processing points of tooth fillings for hardening tooth fillings during dental treatment includes a housing containing a light source for emitting visible or invisible light, a light conductor optically coupled to the light source which transmits visible or invisible light to the processing points, a fan for cooling the light source and a rechargeable battery and means for counting the times the light source is activated.

Abstract: The invention refers to a holding device consisting of holding head and holding shaft for pick-up, transport, and targeted deposit of small components, namely preferably for supplying circuit boards with electrical SMD switching elements.According to the invention, the holding head is designed so that upon a pressure in the direction of the components to be picked up, a bistable switching element is activated and consequently, the adhesion of the component as well, and upon the next pressure in the same direction, it is again deactivated. This saves specific control actions to activate and deactivate a compressed air source or other adhesive devices.

Abstract: A holding device for wound toroidal cores is formed of a carrier plate and a centering arbor extending from the carrier plate into the inside of the wound core. The wound core is fixed in place on the arbor by a casting compound.