STRING BEARING AND TREMOLO DEVICE METHOD AND APPARATUS FOR STRINGED MUSICAL INSTRUMENT

摘要

A method and apparatus that provides string bearings (32) and constant inter string pitch correction and pitch trajectory control tremolo device (64 or 80) for a stringed instrument (12). The bearings (32) contain low axial friction and high radial stiffness bearing inserts (40) whose surface supports the strings to provide the witness points of nuts, bridges, frets, and finger boards. The constant inter string pitch correction and pitch trajectory control tremolo device (64 or 80 in Fig. 5 or 6) provides the simultaneous correction of string pitch to maintain a constant open tuning ratio relationship throughout all tremolo bar input angles and the control of the strings' pitch trajectories to provide a chromatic (Fig 8), linear (fig. 9), natural (fig. 10), or combination pitch trajectory. Non linear string tension devices from the group of substantially non circular pulleys (66), cams (82), an electrically activated solenoids and motors (96) whose axial displacement table (Fig. 8a, 9a, 10a) has been designed to provide the constant inter string pitch correction and pitch trajectory control multiplicand of the tremolo bar input (76) angle.