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US 8,295,131 B2Granted
Chronograph timepiece
AssigneeSeiko Instruments Inc.
InventorsKazuo Kato, Akira Takakura, Kenji Ogasawara, Saburo Manaka, Kazumi Sakumoto, Hiroshi Shimizu, Tomohiro Ihashi, Keishi Honmura, Takanori Hasegawa, Kosuke Yamamoto, Eriko Noguchi
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Abstract
In a chronograph timepiece in which the chronograph hands are electrically rotated by a motor drive pulse and are mechanically zero-restoring-controlled, a basic drive control unit controls a motor so as to drive the chronograph hands when it is detected by a contact portion and a setting releasing detection portion that the setting of the chronograph hands by a setting mechanism has been released.
Claims4
A chronograph timepiece comprising:
- an operating means giving at least an instruction to start time measurement;
- a setting mechanism mechanically setting a chronograph hand to a zero-restoring position in a reset state;
- a releasing means for releasing the setting of the chronograph hand by the setting mechanism in response to the instruction to start time measurement from the operating means;
- a motor for driving the chronograph hand;
- and a control means performing control such that the motor drives the chronograph hand in response to the instruction to start time measurement given by the operating means,
- wherein the chronograph timepiece has a setting releasing detection means for detecting the releasing of the setting of the chronograph hand by the setting mechanism;
- and the control means controls the motor such that the chronograph hand is driven when the setting releasing detection means detects the releasing of the setting of the chronograph hand.
4 more elements
Dependencies are inferred from the claim text.