Title: Chronograph timepiece having hour/minute coupling lever
Application Number: 200410031275 Application Date: 2004.03.26
Publication Number: 1542571 Publication Date: 2004.11.03
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G04F7/08
Applicant(s) Name: Seiko Instr Inc. Address:
Inventor(s) Name: Takahashi Takashi, Takizawa Katsuyoshi, Suzuki Shi
Attorney & Agent: liao lingling
Abstract:
     To realize a chronograph timepiece in which a number of levers constituting a coupling mechanism is small, a shape of the lever is simple and fabrication of the lever is facilitated. A chronograph timepiece of the invention includes a main plate, a surface train wheel, an escapement/speed control apparatus, at least one of an automatic winding apparatus and a hand winding apparatus, a second chronograph train wheel, a minute chronograph train wheel and an hour chronograph train wheel. The chronograph timepiece further includes a plurality of levers for coupling operation of the second chronograph train wheel and an hour/minute coupling lever for controlling to operate to rotate and stop the minute chronograph train wheel and the hour chronograph train wheel. The hour/minute coupling lever includes an hour clutch ring contract portion for making an hour chronograph wheel clutch ring ON/OFF and a minute clutch ring contactportion formaking aminute chronograph wheel clutch ring ON/OFF.
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