Music – Instruments – Electrical musical tone generation
Reexamination Certificate
2007-03-27
2007-03-27
Donovan, Lincoln (Department: 2837)
Music
Instruments
Electrical musical tone generation
C310S339000, C310S331000
Reexamination Certificate
active
10400493
ABSTRACT:
An electronic drum includes a pad to be beaten with sticks, a circular piezoelectric converter for converting stress to an electric signal and a semi-circular filter element adhered at one surface to the pad and at the other surface to the circular piezoelectric converter; the circular piezoelectric converter is partially held in contact with the semi-circular filter element and partially overhung under the pad; when the vibrations reach the filter element, the filter element eliminates high frequency vibration components from the vibrations, and transmits them to the half of the circular piezoelectric converter; the vibrations give rise to bending stress in the half of the piezoelectric converter held in contact with the filter element, and shake the other half of the piezoelectric converter; this results in enlargement of the bending stress, and the electric signal with a wide amplitude is taken out from the piezoelectric converter.
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Copy of Japanese Office Action dated Feb. 28, 2006 (and English translation of relevant portion).
Dickstein & Shapiro LLP
Donovan Lincoln
Warren David S.
Yamaha Corporation
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