Accessory unit for music pupils and brass player, is sealed at two sealing surfaces at upper side of piston and at lower side of plug screw, where sealing of accessory unit takes place with aid of magnet which is inserted in piston

摘要

The accessory unit is sealed at two sealing surfaces at the upper side of a piston (2) and at the lower side of a plug screw (3). The sealing of the accessory unit takes place with the aid of magnet (4) which is inserted in the piston. The magnetic accessory unit is inserted between brass instrument and mouthpiece. A casing (1) is provided, which is inserted into the brass instrument. A spring (5) is provided, which is inserted into the casing. Then the piston is inserted and at the end the plug screw is screwed into the casing. An independent claim is also included for the air conduction with the loosening of the two sealing surfaces over the slots on the shell of the piston.