Spectacles with fastening device

Details Spectacles with fastening device Spectacles with fastening device

G - Physics

02

C

88/23

G02C 1/02 (2006.01)

Patent

CA 1267007

SPECTACLES WITH FASTENING DEVICE ABSTRACT - This invention relates to spectacles in which the spectacle lens is connected to an individual component, for example a flange, by means of a fastening device. In the spectacle lens the two ends of a borehole are ex- panded into two borehole widenings which are engaged with a first protrusion on the flange and with a connecting element that is connected to a pin leading to the first protrusion. In addition, the flange has two further protrusions supporting themselves on the border Or the spectacle lens, so that a four- point anchoring of the flange secured by the pin against pulling and by the additional protrusions against rotating is furnished on the spectacle lens and vice versa. A certain flange is suitable for given thicknesses and curvatures of the spectacle lens, because both on the front side and the back side of the spectacle lens it is not the front or back sides that define the gripping sur- faces for the connecting element and first protrusion, but the borehole wid- ening.

485977

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