Music – Instruments – General features
Patent
1998-02-20
2000-07-11
Nappi, Robert E.
Music
Instruments
General features
G10C 312
Patent
active
060875763
ABSTRACT:
The keyboard apparatus is constituted by a series of units in which key stems are connected to a key support section through a connection section. The width of the connection section is wider than a width of the back-end of the key stem attached to the connection section, and the units are stacked vertically so that the connection sections partially over lap. White keys are arranged in a plurality of upper key units and lower key units, having key stems, connection sections and support sections, which are transversely linked to one another. In a keyboard in which the lower key units are stacked in such a way that the key support section of the lower key units are underneath the key support sections of the upper key units, the back-ends of the key stems are joined to the transverse midpoints of connection sections. The keys are arranged so that the lateral surfaces of the key stems in adjacent upper key units are disposed substantially in one common plane.
REFERENCES:
patent: 3205754 (1965-09-01), Becwar
patent: 3570359 (1971-03-01), Ohno
patent: 3855894 (1974-12-01), Thomas et al.
patent: 4488472 (1984-12-01), Kumano et al.
patent: 5821443 (1998-10-01), Masubushi
Mason, M.H.; Piano Parts and Their Functions., Western Publisher's Service, Seattle, 1977, pp. 26-27.
Lockett Kim
Nappi Robert E.
Yamaha Corporation
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