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APPARATUS FOR DRIVING AN ELECTRIC WATCH
   
Document Number
US Patent 3740943
Issued Date
June 26, 1973
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Abstract
An apparatus for driving an electric watch having a balance wheel which is driven electro-magnetically, wherein driving current is alternately applied in opposite directions to the driving coil.
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APPARATUS FOR DRIVING AN ELECTRIC WATCH - US Patent 3740943 Drawing
Drawing from US Patent 3740943
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Number of Claims:
3
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Published
June 26, 1973
Application Number
05/158,349
Filed
June 30, 1971
US Classification
368/158   318/130 331/113R 368/163 968/477
Int'l Classification
G04C   3/00   (20060101)   G04C   3/06   (20060101)   H02K   33/00   (20060101)  
Assistant Examiner
Priority Data
Jul 07, 1970 [JA] 45-58952
USPTO Field of Search
58/23R   58/23A   58/23AD   58/28R   58/28A   58/28AD   318/130   331/109   331/113R   331/154  
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