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US 4,376,991 AGranted
Electronic watch with analogic display
AssigneeComplications S.A.
InventorValentin Piaget
Life of this patent
Estimating the term…
Abstract
This watch comprises a date crown or date disc (9) pivoted onto a plate (10) and completely independent of a driving gear train (1, 2, 3). A second micro-motor (14) drives this crown (9) in its angular displacements.
Claims3
In an electronic watch having an analogic hour and minute hand display and a date crown, comprising a first micro-motor controlled by a first control circuit driven by a time base and powered by a battery, and a gear train driven by said first micro-motor and driving the hands of the display of the watch;
- the improvement comprising a second micro-motor controlled by a second control circuit driven by said time base, said second micro-motor driving said date crown completely independently from the gear train driven by the first micro-motor.
Dependencies are inferred from the claim text.