Hammer mechanism for grand piano, includes pair of magnets for reducing friction between repetition lever and hammer stem

摘要

A first transmission system (10, 11, 13) between the key and second transmission system (1, 16, 17) includes a first permanent magnet (31). The second transmission system between the first transmission system and the string associated with the key includes a second permanent magnet (30). The two magnets are positioned so that they reduce friction between the repetition lever (13) in the first transmission system and the hammer stem (16) in the second transmission system.