Method of making coaxial cable

Details Method of making coaxial cable Method of making coaxial cable

1986-08-15

1987-12-29

Echols, P. W.

Metal working

Piezoelectric device making

156 50, H04R 1700

Patent

active

047150980

ABSTRACT:
A piezoelectric coaxial cable comprises a central stretchable electrical conductor (1), preferably formed from a low melting point metal alloy, a piezoelectric intermediate layer (2), preferably formed from a vinylidene fluoride polymer which has been stretched and radially polarized to render it piezoelectric, and an outer electrical conductor (3).
The intermediate layer has a ratio R of its internal radius to its external radius which is preferably not more than 0.5 and more preferably not more than 0.4. This construction enables coaxial cables to be formed without voiding or breaking of the internal conductor during stretching.

REFERENCES:
patent: 3750127 (1973-07-01), Ayers et al.
patent: 3798474 (1974-03-01), Cassand et al.
patent: 3862477 (1975-01-01), Ayers et al.
patent: 4183010 (1980-01-01), Miller
patent: 4303733 (1981-12-01), Bulle et al.
patent: 4369391 (1983-01-01), Micheron
patent: 4378721 (1983-04-01), Kaneko et al.
patent: 4688306 (1987-08-01), Sonl et al.

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