Patent ID: 7915508
Filing Date: 2011-03-29
Classification: G10F,G10H

Abstract:
1. A keyboard assembly for playing music automatically comprising: a plurality of juxtaposed keys including white keys and black keys and arrayed from left to right over octaves, each being supported swingable in a direction of depression and release thereof; a plurality of swing weights juxtaposed in parallel with and respectively corresponding to the juxtaposed keys, each of the swing weights being supported swingable as interlocked with the corresponding one of the keys; and a plurality of electrically operated actuator devices, each being provided in correspondence to each of the swing weights to actuate the corresponding swing weight, which in turn drives the interlocked key to swing to its depressed position, wherein a distance, in the direction of the juxtaposition, between a pair of the actuator devices corresponding to a pair of the juxtaposed keys within an octave is different from a distance, in the direction of the juxtaposition, between a pair of the juxtaposed swing weights corresponding to the pair of the juxtaposed keys within the octave.