Horology: time measuring systems or devices – Power supply details – Electrical
Patent
1995-05-11
1998-04-14
Roskoski, Bernard
Horology: time measuring systems or devices
Power supply details
Electrical
368203, 368205, G04B 100
Patent
active
057401322
ABSTRACT:
An electronic time piece senses and warns the electric residue of a secondary cell having electrodes of conductive polymer to a user during the rapid charge.
The electronic time piece converts a kinetic energy produced by the user's motion into an electric energy. The electric energy is then outputted from a power generator coil as a charging voltage for charging a chemical reaction type secondary cell. The charged energy in the secondary cell is used to actuate a time piece circuit for indicating the time.
The electronic time piece comprises an electric residue sensor unit which outputs an electric residue detection signal when the voltage in the secondary cell continues to exceed a reference voltage corresponding to an electric residue in the secondary cell for a predetermined time during the rapid charge.
REFERENCES:
patent: 4041691 (1977-08-01), Chihara et al.
patent: 4321541 (1982-03-01), Nishizuka
patent: 4730287 (1988-03-01), Yoshino et al.
patent: 4785436 (1988-11-01), Sase
Kitahara Joji
Ohshima Yasuhiro
Roskoski Bernard
Seiko Epson Corporation
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