Invention Grant
- Patent Title: Chronograph timepiece
- Patent Title (中): 计时钟表
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Application No.: US12804138Application Date: 2010-07-14
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Publication No.: US08213268B2Publication Date: 2012-07-03
- Inventor: Kazuo Kato , Akira Takakura , Kenji Ogasawara , Saburo Manaka , Kazumi Sakumoto , Hiroshi Shimizu , Tomohiro Ihashi , Keishi Honmura , Takanori Hasegawa , Kosuke Yamamoto , Eriko Noguchi
- Applicant: Kazuo Kato , Akira Takakura , Kenji Ogasawara , Saburo Manaka , Kazumi Sakumoto , Hiroshi Shimizu , Tomohiro Ihashi , Keishi Honmura , Takanori Hasegawa , Kosuke Yamamoto , Eriko Noguchi
- Applicant Address: JP
- Assignee: Seiko Instruments Inc.
- Current Assignee: Seiko Instruments Inc.
- Current Assignee Address: JP
- Agency: Adams & Wilks
- Priority: JP2009-168255 20090716
- Main IPC: G04F8/00
- IPC: G04F8/00 ; G04F10/00

Abstract:
Disclosed is a chronograph timepiece in which it is possible to prevent a non-rotation state at the time of first driving when chronograph measuring operation is reset during motor drive and restarting is effected. When a resetting operation is performed on a reset button during the driving of a motor and a rotation detection circuit detects non-rotation, a drive control unit controls a drive pulse generation circuit such that the control is completed without reversing the polarity of a motor drive pulse output from the drive pulse generation circuit, and that the motor is driven by a drive pulse of the same polarity as that at the time of the previous resetting in response to a starting operation performed on a start/stop button, driving the motor by the drive pulse of the same polarity at the time of restarting after the resetting.
Public/Granted literature
- US20110026372A1 Chronograph timepiece Public/Granted day:2011-02-03
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