Variable light transmitting sunglasses
US5210552A · kind A · utility
9Cited by
12References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Nov 18, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pair of variable density sunglasses include two lens elements of polarized material forming each lens. The other lens element is rotatable in a channel in the frame by manipulation of a gear mounted on the nose bridge, the gear teeth being engaged with gear teeth on the edge of the outer lens element. Rotation of the gear is limited by a peg extending from the back thereof into an arcuate channel on the nose bridge. The stationary inner lens is prevented from rotation by an edge tab extending into an opening in the lens channel through which the gear and rotatable lens engage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.