Music – Instruments
Patent
1979-10-26
1981-07-14
Witkowski, Stanley J.
Music
Instruments
84DIG24, 310328, 310369, 310800, G10H 318
Patent
active
042780004
ABSTRACT:
The present invention provides a piezoelectric transducer and pickup means using the same for electrical string instruments, the transducer comprising a long and flat outer layer of flexible material and a flexible piezoelectric cable which is buried therein and has a center electrode, a piezoelectric layer formed on the outer periphery of the said electrode and an outer electrode formed on the outer periphery of the said layer, the stiffness thereof being enhanced by either using elastomer of the hardness of more than 80 as measured by the Spring Hardness Test Method in the Physical Testing Method for Vulcanizing Rubber of Japanese Industrial Standard (JIS K 6301) as the material for the outer layer, or by plaiting (braiding) metal wires or by winding the outer electrode of the piezoelectric cable in such a manner as to enable it to press against the piezoelectric layer.
REFERENCES:
patent: 2769867 (1956-11-01), Crownover et al.
patent: 3396284 (1968-08-01), Scherer
patent: 3519721 (1970-07-01), Martin et al.
patent: 3712951 (1973-01-01), Rickard
patent: 3750127 (1973-07-01), Ayers et al.
patent: 3798474 (1974-03-01), Cassand et al.
patent: 3820208 (1974-06-01), Baldy
patent: 4183010 (1980-01-01), Miller
Saito Shigeo
Tsunooka Tsutomu
NGK Spark Plug Co. Ltd.
Witkowski Stanley J.
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