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Publication of CH239070A4publicationCriticalpatent/CH239070A4/xx
G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
G—PHYSICS
G04—HOROLOGY
G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
G04B31/012—Metallic bearings
G04B31/0123—Metallic bearings with metallic ball bearings and metallic roller bearings