CLOCK SYSTEM AND METHOD FOR CONTROLLING CLOCK SYSTEM

Title:

CLOCK SYSTEM AND METHOD FOR CONTROLLING CLOCK SYSTEM

Document Type and Number:

WIPO Patent Application WO/2003/107099

Kind Code:

A1

Abstract:

A clock system comprises a parent clock and a child clock (3). The parent clock has a time signal generating circuit that receives a standard wave and generates a time signal receivable by a motor driving coil (35) of the child clock (3), and a transmission circuit and a coil both for transmitting the time signal. The child clock (3) has a time counter (33) for measuring the time according to the standard signal, a drive motor having a drive coil (35), a receiving circuit (37) for receiving the time signal at the drive coil (35), a control circuit (38) for correcting the time counter (33) by using the received time signal, and a time display section (36) for displaying the time. Since the drive coil (35) is used, the number of parts and the cost are not increased, the time setting can be done in a short time, and the water-proofing property is improved.

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Inventors:

KAWAGUCHI TAKASHI

Application Number:

PCT/JP2003/007523

Publication Date:

December 24, 2003

Filing Date:

June 12, 2003

Export Citation:

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Assignee:

SEIKO EPSON CORP (JP)

International Classes:

G04G5/00; G04C3/00; G04G21/04; G04R20/00; G04R20/08; G04R20/26; (IPC1-7): G04C9/02; G04C11/00

Foreign References:

JPH1184028A	1999-03-26
JP2000221285A	2000-08-11
JP2002148371A	2002-05-22
JP2001305248A	2001-10-31
JPH11211857A	1999-08-06
JPH09113647A	1997-05-02
JPH0676895U	1994-10-28
JPS5487264A	1979-07-11
JPS51109874A	1976-09-29

Other References: