G10CPIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS automatic musical instruments G10FIn this subclass, the specific types of musical instruments are covered by group G10C1/00, while aspects relevant to the details thereof or the accessories therefor are covered by groups G10C3/00-G10C9/00. G10C1/00 G10C1/00General design of pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards G10C1/02of upright pianos G10C1/04of grand pianos G10C1/06of harpsichords spinets or similar stringed musical instruments G10C3/00Details or accessories G10C3/02Cases G10C3/04FramesBridgesBars G10C3/06Resonating means, e.g. soundboards or resonant stringsFastenings thereof G10C3/07Strings resonant strings G10C3/06 G10C3/08Arrangements thereof G10C3/10Tuning pinsTensioning devices G10C3/103the axis of the pins being parallel to the strings G10C3/106the axis of the pins being perpendicular to the strings G10C3/12KeyboardsKeys G10C3/125Materials or treatment of materials for the manufacturing of keys G10C3/14for playing by the feet G10C3/16Actions G10C3/161specially adapted for upright pianos G10C3/163the action being mounted in a plane below the keyboard G10C3/165for plucking the strings G10C3/166for damping the strings G10C3/26 takes precedence G10C3/168with hanging jacks, i.e. jacks connected to hammer-butts or hammer-shanks G10C3/18Hammers G10C3/20involving the use of hydraulic, pneumatic or electromagnetic means G10C3/22specially adapted for grand pianos G10C3/23with hammers mounted above the strings, striking downwards G10C3/24Repetition [tremolo] mechanisms G10C3/26Pedals or pedal mechanisms G10C3/14 takes precedenceManually operated sound modification means G10C3/28Transposing devices G10C3/30Couplers, e.g. for playing octaves G10C5/00Combinations with other musical instruments, e.g. with bells or xylophones G10C5/10Switching musical instruments to a keyboard, e.g. switching a piano mechanism or an electrophonic instrument to a keyboardSwitching musical instruments to a silent mode G10C9/00Methods, tools or materials specially adapted for the manufacture or maintenance of musical instruments covered by this subclass