Music – Instruments
Patent
1985-06-18
1986-12-16
Witkowski, S. J.
Music
Instruments
84 127, 84DIG7, G10H 134
Patent
active
046287868
ABSTRACT:
A keyboard system in a keyboard controlled musical instrument includes a pair of spaced apart electrode members and a pickup movable in the space intermediate the electrode members. Respective voltages are impressed on the electrodes to establish an electric field therebetween and the voltage impressed on the movable pickup is a function of its position relative to the two electrodes. The pickup is actuated by the playing key which contacts a resilient, yieldable stop. The force with which the playing key is depressed is measured by sensing when the key is fully depressed, initiating a count at that point and counting a predetermined period. At the end of the predetermined period the voltage on the pickup is detected which gives an indication of the amount of overtravel of the key beyond its normal depressed position. This detected voltage is used to alter the quality of the tones produced by the musical instrument.
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Kimball International Inc.
Witkowski S. J.
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