(19)
(11) EP 0 935 178 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.08.2001 Bulletin 2001/34

(43) Date of publication A2:
11.08.1999 Bulletin 1999/32

(21) Application number: 99300825.9

(22) Date of filing: 04.02.1999
(51) International Patent Classification (IPC)7: G04G 1/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 05.02.1998 JP 2479898

(71) Applicants:
  • Seiko Instruments Inc.
    Chiba-shi, Chiba (JP)
  • Seiko Instruments R&D Center Inc.
    Chiba-shi, Chiba (JP)

(72) Inventor:
  • Kanesaka, Toshiya
    Mihama-ku, Chiba-shi, Chiba (JP)

(74) Representative: Sturt, Clifford Mark et al
Miller Sturt Kenyon 9 John Street
London WC1N 2ES
London WC1N 2ES (GB)

   


(54) Radio-controlled watch


(57) When a voltage generated by an electrical generator means becomes below a certain value, a detection signal from a voltage detection means opens a switching means. The supply of electrical power from an electrical storage means to a radio-controlled timepiece circuit is stopped. When the voltage generated by the generator means regains the given value, the detection signal from the voltage detection means closes the switching means, supplying electric power to a radio-controlled timepiece circuit. At the same time, a control signal from the voltage detection means activates a radio receiver circuit. Thus, a timepiece body circuit is synchronized by radio control technology. Precise time is displayed by a display means .






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