Patent ID: 7633002

Claim:
In a pianoforte having a plurality of piano key assemblies arranged side by side on a keyboard and numbered consecutively from the lowest key assembly in the bass register (#1) to the highest key assembly in the treble (#88) for causing a musical tone to be played by the pianoforte, each said key assembly comprising, in combination: a) an elongated keystick having two ends, one end of said keystick being adapted to be depressed by a human finger; b) a fulcrum constituting a pivot point for pivotally holding said keystick substantially midway between said two ends; and c) said keystick having a static balance weight, the improvement comprising: a. the keystick being notionally divided into quadrants with the first quadrant being at the end to be struck by the finger of the player, the second quadrant lying between the pivot point and the first quadrant, the fourth quadrant lying at the opposite end to the first quadrant, and the third quadrant lying between the pivot point and the fourth quadrant, b. said keystick being modified to achieve a balance weight of between 50 to 60 grams for the lowest key assembly in the bass register (#1) with the balance weight tapered to 40 to 50 grams for the highest key assembly in the treble register (#88) for improving the dynamic response of said keystick; c. said keystick characterized by at least one weight mounted on the keystick in the second quadrant; and d. the first quadrant of the keystick being free of any added weights and containing from 0 to 4 empty holes to reduce weight.