ELECTRICALLY CONTROLLED MECHANICAL TIMEPIECE AND BRAKING METHOD

Title:

ELECTRICALLY CONTROLLED MECHANICAL TIMEPIECE AND BRAKING METHOD

Document Type and Number:

WIPO Patent Application WO/2000/031595

Kind Code:

A1

Abstract:

An electronically controlled mechanical timepiece comprises first and second switches (121, 122) arranged between an input terminal (22a) of a capacitor (22) and output terminals (MG1, MG2) of a generator (20), a third switch (130) arranged between the output terminal (MG1) and an input terminal (22b) of the capacitor (22), and a braking circuit (55) for controlling the switches independently. When the braking circuit (55) turns off the switch (121) and turns on the switches (122, 130), current flows from the capacitor (22) to the generator (20) to produce pulses for watch-error measurement to facilitate the measurement of watch errors.

Inventors:

SHIMIZU EISAKU (JP)
KOIKE KUNIO (JP)
NAKAMURA HIDENORI (JP)

Application Number:

PCT/JP1999/005488

Publication Date:

June 02, 2000

Filing Date:

October 05, 1999

Export Citation:

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Assignee:

SEIKO EPSON CORP (JP)
SHIMIZU EISAKU (JP)
KOIKE KUNIO (JP)
NAKAMURA HIDENORI (JP)

International Classes:

G04B17/00; G04C3/00; G04C10/00; G04C11/00; (IPC1-7): G04C3/00; G04B1/10; G04B17/00; G04C10/00

Foreign References:

JPH08101284A	1996-04-16
JPS506373A	1975-01-23
JPS4984680A	1974-08-14
JPH11101880A	1999-04-13
EP0695978A1	1996-02-07

Other References: