Rimless spectacles for correction purposes
US4692001A · kind A · utility
Inventor
Key dates
| Filing date | Oct 15, 1984 |
| Grant date | Sep 8, 1987 |
| Priority date | — |
| Expiry date | Oct 15, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C5/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Spectacles of the so-called metal-fitting type exhibits, in addition to the spectacle lenses, a bridge, two temples, two hinge pieces for the two temples, fastening devices for connecting the bridge and the hinge pieces to the lenses, and at least one bridge and a bridge mounting, whereby the mechanical, supporting connection between the bridge and the hinge pieces alone secures the spectacle lenses intermediately situated and no eyewires are present. With the possible exception of the lenses, in these spectacles all the components determining its geometry are made of plastic. By comparison to the traditional metal-fitting spectacles, in which these structural components are all made of metal, these new spectacles are lighter, safer from breaking, and susceptible of being fitted to the wearer in a simple fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.