Method of producing a carbon diaphragm for an acoustic instrumen

Details Method of producing a carbon diaphragm for an acoustic instrumen Method of producing a carbon diaphragm for an acoustic instrumen

1978-12-13

1980-09-09

Meros, Edward J.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

181167, 264 291, 264 297, 423448, 423449, C01B 3102, G10K 1300

Patent

active

042217733

ABSTRACT:
A method of producing a diaphragm of an acoustic instrument having the steps of blending powders of carbon such as graphite, carbon black or the like and a thermoplastic or a thermosetting resin, shaping the resultant blend into a desired form and then carbonizing the shaped blend. As a result, it has become possible to produce a diaphragm of an acoustic instrument, having a light weight, high rigidity and a large ratio of Young's modulus to density.

REFERENCES:
patent: 3084394 (1963-04-01), Bickerdike et al.
patent: 3089195 (1963-05-01), Woodburn
patent: 3198714 (1965-08-01), Johnson et al.
patent: 3201330 (1965-08-01), Price
patent: 3219731 (1965-11-01), Etzel et al.
patent: 3907950 (1975-09-01), Bickerdike et al.
patent: 3969124 (1976-07-01), Stewart

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