US 4,364,671 AGranted

Electronic watch with display by discs

AssigneeEbauches S.A.

InventorJosef Fluck

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Abstract

The invention provides a very thin electronic watch having a casing with a front wall provided with a glass, a rear wall and a side wall connecting the front and rear walls. In the casing there is a spindle substantially perpendicular to the front and rear walls and mounted pivotally with respect to the casing, a toothed transmission wheel secured to the spindle, a "minutes" disc perpendicularly secured to the spindle and provided with a tooth arrangement on its periphery, and an "hours" disc pivotally mounted on the spindle, substantially parallel to the "minutes" disc and provided with a tooth arrangement on its periphery, the "minutes" and "hours" discs being disposed between the glass and the toothed transmission wheel. The casing further has an electric motor, a supply source, a first gear train engaging the rotor of the electric motor and the "minutes" disc and a second gear train engaging the "hours" disc and the transmission wheel.

Claims8

Dependent claims

An electronic watch comprising:

a casing having a front wall provided with a glass, a rear wall, and a side wall connecting the front and rear walls, and, in said casing:
a spindle which is substantially perpendicular to said front and rear walls and which is mounted pivotally with respect to said casing;
a toothed transmission wheel which is secured to said spindle;
a minutes disc which is secured to said spindle and which is perpendicular thereto and which is provided with a tooth arrangement on its periphery;
an hours disc which is mounted pivotally on said spindle, which is substantially parallel to the minutes disc and which is provided with a tooth arrangement on its periphery, said discs being disposed between said glass and said toothed transmission wheel;
an electric motor provided with a rotor and means for supplying and actuating said motor;
a first train of gears engaging with said rotor and said minutes disc;
and
a second train of gears engaging with said hours disc and said transmission wheel.

6 more elements

Dependencies are inferred from the claim text.