Patent ID: 6365820
Filing Date: 2002-04-02
Classification: G10H,Y10S

Abstract:
A keyboard assembly comprising:a plurality of keys; a plurality of mass members each disposed to be pivotally driven in response to depression of a corresponding one of said plurality of keys; a support device that pivotally supports said plurality of keys and said mass members corresponding respectively to said keys; and a plurality of musical tone instruction devices that are provided respectively for said plurality of keys and each instruct generation and damping of a musical tone in response to depression of a corresponding one of said plurality of keys; wherein said musical tone instruction devices each comprise a first sensor and a second sensor for generating a key event during a stroke of the corresponding one of said keys in response to depression of the corresponding one of said keys or in response to pivotal movement of a corresponding one of said mass members responsive to the depression of the corresponding one of said keys; said first sensor being disposed to be activated in a first half of the stroke of the corresponding one of said keys to determine timing for damping of the musical tone; said second sensor being disposed to be activated in a second half of the stroke of the corresponding one of said keys to determine timing for generation of the musical tone, said second sensor further determining timing for determining a velocity of the corresponding one of said keys depending on a position of the corresponding one of the keys during the stroke relative to said support device.