| 摘要 |
This specification discloses an improved keyboard for musical instruments in which selected keys (1,3) have indicia (2,4) applied to their exposed surfaces, said indicia (2,4) being formed from ink which is sensitive to ultra-violet radiation, and a low power actinic lamp (5) mounted on the instrument in overlying relationship with the indicia (2,4) on the keys (1,3) so that the indicia (2,4) are visible to a player when illuminated by the lamp (5). |
