Construction material for stringed musical instruments

Details Construction material for stringed musical instruments Construction material for stringed musical instruments

1975-03-31

1982-12-21

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

84184, 84193, 428283, 428284, 428286, 428325, 428406, 428407, 428408, 428413, 428415, 428427, 428438, 428902, 428910, B32B 702

Patent

active

043649904

ABSTRACT:
Improved construction material especially suitable for use in the manufacture of soundboards and panels used in stringed instruments which equal or surpass the sound radiation qualities and physical properties of wood. The construction material of the invention includes fibers having a Young's modulus of elasticity greater than 18.times.10.sup.11 dynes/cm.sup.2 and a density less than 2 g/cc bonded to a material having a density lying within the range of 0.15 g/cc and 1 g/cc, the said fibers of the composite are oriented in such manner so as to provide a final material having a bending stiffness ratio of at least 4:1.

REFERENCES:
patent: 3316139 (1967-04-01), Alford et al.
patent: 3474697 (1969-10-01), Kaman
patent: 3477330 (1969-11-01), Bert
patent: 3617416 (1971-11-01), Komrey
patent: 3618442 (1971-11-01), Kawakami
patent: 3664911 (1972-05-01), Takabayashi
patent: 3699836 (1972-10-01), Glasser
patent: 3724312 (1973-04-01), Yamada et al.

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