Music – Instruments – Stringed
Patent
1984-07-24
1986-06-10
Hix, L. T.
Music
Instruments
Stringed
84431, G10C 304
Patent
active
045935947
ABSTRACT:
In the construction of a housing for upright pianos, as a substitute for the conventional hard, thick and heavy wooden boards associated with back posts vulnerable to circumstantial changes, soft, thin and light wooden boards are attached to a metallic skelton of a substantially rectangular construction suited for supporting a keyboard assembly. Weight of the housing is greatly reduced without impairing strength and no use of back posts makes the housing well durable against changes in environmental factors.
REFERENCES:
patent: 464993 (1891-12-01), Reed
patent: 2486338 (1949-10-01), Sperry et al.
patent: 2501641 (1950-03-01), Cline
patent: 3262350 (1966-07-01), Johnson
patent: 4376402 (1983-03-01), Helpinstill, II
Sato Shigeaki
Sato Takane
Tachida Hiroki
Brown Brian W.
Hix L. T,.
Nippon Gakki Seizo Kabushiki Kaisha
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