Watch with solar cell unit

作者: Yoshihisa Urushida

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摘要: A plurality of pie-shaped solar elements which comprise the face watch are positioned and secured by a holder in form wagon wheel having two concentric rings joined spokes. The underside each spoke has downwardly projecting ridge extends between adjacent to separate locate while providing cover hide edges element.

参考文章(1)
Akio Negoro, Kenjiro Kimura, Tsutomu Saiji, Yasuo Kojima, Timepiece using a solar battery as the power source ,(1966)