String bearing and tremolo device method and apparatus for strin

Details String bearing and tremolo device method and apparatus for strin String bearing and tremolo device method and apparatus for strin

1997-10-18

1999-11-16

Donels, Jeffrey W.

Music

Instruments

Stringed

84307, 84313, G10D 300

Patent

active

059861908

ABSTRACT:
This is a method and an apparatus that provides string bearings (32) and constant inter string pitch correction and pitch trajectory control tremolo device (64 or 80) for a stringed musical instrument (12). The string bearings (32) allow the strings (18) of the instrument to move freely in the axial direction and to be guided with high stiffness in the radial direction. The string bearings 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 material of preference for the string bearing inserts (40) is one of the highest energy resiliency and stiffness and the lowest friction. The string bearings and their inserts are adjustable (32, 56, 42, 58) or fixed position. Adjustments are in the horizontal, vertical, and axial (46, 50, 48) directions or any combination thereof. 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), and electrically activated solenoids and motors (96) whose axial displacement table (FIGS. 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.

REFERENCES:
patent: 3178985 (1965-04-01), Jeranson
patent: 4742750 (1988-05-01), Storey
patent: 4768414 (1988-09-01), Wheelwright
patent: 5208410 (1993-05-01), Foley
patent: 5750910 (1998-05-01), LoJacono

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