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US 10,520,892 B2Granted
Lunar phase display device
AssigneeBlancpain SA
InventorMartin Robin
Life of this patent
Estimating the term…
Abstract
A lunar phase display device including an annular cover including four ring portions, two successive ring portions being separated by a convex lobe projecting radially towards the inside of the annular cover; a moon indicator disc, a drive device arranged to move the moon indicator disc so that the disc makes a cycloidal trajectory between two successive lobes, the moon indicator disc being at least partially occulted by each of the two lobes during one portion of the cycloidal trajectory so as to reproduce the phases of the moon during a lunar month.
Claims11
A lunar phase display device comprising:
- an annular cover comprising four ring portions, two successive ring portions being separated by a convex lobe projecting radially towards the inside of the annular cover;
- a moon indicator disc,
- drive means arranged to move the moon indicator disc so that said disc makes a cycloidal trajectory between two successive lobes of the convex lobes, the moon indicator disc being at least partially occulted by each of the two successive lobes during one portion of the cycloidal trajectory so as to reproduce the phases of the moon during a lunar month.
Dependencies are inferred from the claim text.