Two hand movement for timepiece with stepping motor

Details Two hand movement for timepiece with stepping motor Two hand movement for timepiece with stepping motor

G - Physics

04

C

G04C 3/00 (2006.01) G04C 3/14 (2006.01)

Patent

CA 2048826

PI-1285 ABSTRACT OF THE DISCLOSURE An improved movement for a timepiece of the type having an hour hand, a minute hand, driving circuit adapted for connecting to an energy cell, a stepping motor, a plastic frame member having a dial side and a back side, and adapted to hold the stepping motor, and a gear train supported by said frame member and arranged to drive the hour hand and minute hand the said stepping motor. The gear train comprises a first assembly of a center wheel and center pinion with center wheel driven directly by the stepping motor, a second assembly of a minute wheel and minute pinion with minute wheel driven directly by the center pinion, and an hour wheel driven directly by the minute pinion. The improvement comprises a stub extending from the front side of said frame, defining a center bore extending through the frame and stub, a spindle extending through the center bore and rotatably supporting the first assembly in the frame. The spindle includes a bushing on the front side of said frame adapted to hold the minute hand and to control axial clearances of the first assembly. The bushing may be separate from the spindle, but preferably is integral therewith. The center wheel is frictionally engaged with the spindle on the back side of said frame. A collar fixed to said hour wheel rotatably supports the hour wheel on the stub and also holds the hour hand.

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