Back to results
US 7,274,520 B2Granted
Magnification device for timepiece
AssigneeThe Swatch Group Management Services AG
InventorsYvan Ferri, Pascal Winkler
Life of this patent
Estimating the term…
Abstract
The device consists in compensating for the distortion of the characters marked on the dial caused by a lens, by writing the characters with a reverse pin cushion or barrel distortion.
Claims5
A device for magnifying alphanumerical characters or pictograms that have to be read on the dial of a timepiece, formed of a case closed by a crystal and a back cover and containing a timepiece movement, said magnification being obtained by means of a single magnifying lens, characterized wherein the writing of the characters is deformed in the opposite direction to the distortion caused by the lens.
Dependencies are inferred from the claim text.