1988-10-26
1990-09-11
Franklin, Lawrence R.
Music
Instruments
Stringed
84291, 84452P, G10D 102
Patent
active
049552740
ABSTRACT:
The invention relates to the manufacture of a violin (and other instruments of the violin family), in which the component parts of the acoustic box are made from sheet material. The sheet material is composed of substantially unidirectionally oriented man-made fibres, for example of carbon or boron, set in a matrix of epoxy resin. Thus the fibres are substantially all aligned from end to end in the front plate and in the back plate, we well as in the lengths of the side pieces and bass bar. Using this alignment of fibres that have a high modulus of elaticity, coupled with relatively low specific gravity and low flexural friction in vibration, a design for an instrument's acoustic box is specified which provides for instruments having vibrational systems, similar to that found in traditional instruments, but in which, for the same loudness of sound propagated, there are substantial economies in the proportional of force inherent in a vibration that is deployed in propagating sound.
REFERENCES:
patent: 3699836 (1972-10-01), Glasser
patent: 3880040 (1975-08-01), Kaman
patent: 4408516 (1983-10-01), John
patent: 4836076 (1989-06-01), Bernier
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