Tuning method and apparatus for keyboard musical instrument

Details Tuning method and apparatus for keyboard musical instrument Tuning method and apparatus for keyboard musical instrument

1988-09-13

1990-09-25

Stephan, Steven L.

Music

Accessories

Tuning devices

84455, 84DIG18, G10G 702

Patent

active

049585509

ABSTRACT:
A tuning apparatus for a keyboard musical instrument, having a load applicator for applying a load of a predetermined value to a string set up in place, a calculating device for calculating a deviation between a displacement value of the string produced when the load is applied to the string and a preset value of displacement predetermined to give a required frequency of vibration, and a rotating device for turning a tuning pin until the deviation calculated by the calculating device is reduced to zero.

REFERENCES:
patent: 3405590 (1968-10-01), Pease
patent: 3412638 (1968-11-01), Pease
patent: 4044239 (1977-08-01), Shimauchi et al.
patent: 4375180 (1983-03-01), Scholz
patent: 4426907 (1984-01-01), Scholz
patent: 4791849 (1988-12-01), Kelley
patent: 4803908 (1989-02-01), Skinn et al.

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