| 摘要 |
<p>The combination bare note system is for an accordion, and has a triple keyboard for coupled chords, and other bare not keyboard runs, and has three groups of spring tensioned sound valve levers each of which operate a single note, behind which the mechanical shaft support frames are situated. Each sound flap lever is connected to a key rod through a linkage and the groups of sound levers are connected such that the second and third groups have additional action or operational points by means of which further operational mechanisms may be actuated.</p> |
