Invention Grant
- Patent Title: Mechanical watch having constant spring force
- Patent Title (中): 机械手表具有恒定的弹簧力
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Application No.: US12741506Application Date: 2008-10-22
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Publication No.: US08550701B2Publication Date: 2013-10-08
- Inventor: Patrick Kury , Stephan Kussmaul
- Applicant: Patrick Kury , Stephan Kussmaul
- Applicant Address: CH Grenchen
- Assignee: Eterna AG Uhrenfabrik
- Current Assignee: Eterna AG Uhrenfabrik
- Current Assignee Address: CH Grenchen
- Agency: The Webb Law Firm
- Priority: CH1737/07 20071109
- International Application: PCT/CH2008/000446 WO 20081022
- International Announcement: WO2009/059441 WO 20090514
- Main IPC: G04B5/02
- IPC: G04B5/02
Abstract:
A mechanical watch comprises a motive spring in a first spring barrel and a mechanical and/or automatic winding device. A second spring barrel and a differential having three drive trains are provided, wherein the train connected to the winding device acts on the first and second spring barrels in the same direction.
Public/Granted literature
- US20100254229A1 Mechanical Watch Having Constant Spring Force Public/Granted day:2010-10-07
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