Patent ID: 9520114
Filing Date: 2016-12-13
CPC Classification: G10D

Claim Text:
1. A tuning apparatus for tuning a percussion instrument that has a resonance box and a drumhead membrane which covers at least one side of the resonance box, the tuning apparatus comprising: a base-structure situated inside the resonance box, in contact with or attached to inside of the resonance box, such that the base-structure does not move with respect to the resonance box during tuning; an adjustment-plate moveably attached to the base-structure, wherein a distance between the base-structure and the adjustment-plate is adjustable by a plate-adjusting-component; multiple cable-adjusting-components moveably mounted on the adjustment-plate; multiple cables that connect the cable-adjusting-components to the membrane's circumference, wherein one side of each cable is attached to the membrane's circumference and another side of each cable is directly connected to one of the cable-adjusting-components and wherein each of the cable-adjusting-components is only connected to a subset of the multiple cables; and wherein moving at least one cable-adjusting-component relative to the adjustment-plate changes the tension in the cable(s) connected to the cable-adjusting-component and tunes the membrane regionally and moving the adjustment-plate relative to the base-structure changes the tension in all cables and tunes the membrane globally.