Patent ID: 7888568

Claim:
Timpano, which is capable of changing its tone automatically comprising: a reversible motor linked to and driving a drive mechanism having a plurality of mechanical parts, which gives variable tension to a head; an encoder for reading displacement of one of mechanical parts of said drive mechanism; An operational panel to specify a tone to be tuned to; a memory storing Curve Data comprising set of numbers defining a mathematical function representing a relation between values of said displacement against period or frequency of vibration of the head; First Transformation unit for transforming said tone to be tuned to into a number representing frequency or period of head vibration; Second Transformation unit for transforming said number representing period or frequency of head vibration into target value of said displacement, by using said mathematical function and reading said curve data from the memory; Motor Drive unit driving said motor until the value of said displacement reaches said target value; and Tone Change unit being activated by input at said operational panel specifying tone to be tuned to and activating sequentially the First Transformation unit, the Second Transformation unit, and the Motor Drive unit Period measuring device to measure period or frequency of head vibration; vibration detector to detect that the head is hit and vibrating with an amplitude more than a pre-determined level; tone adjust starting unit activating a Check unit when said vibration detector detects sound; Check unit for checking whether said period or frequency acquired from said period measuring device is in an allowance range from period or frequency already gotten by First Transformation unit, and activating following Updating Data unit when it is not in the allowance range; Updating Data unit for updating said Curve Data in the memory using new pair values of said displacement read from said mechanical part and said period or frequency acquired from said period measuring device, so that best fitness to said new and recent pairs of the displacement and period or frequency of vibration of the head is achieved by said mathematical function defined by said updated Curve Data and activating an Adjust driving unit; where said Adjust driving unit activates Second Transformation unit, and Motor Driving unit.