Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Connectors
Patent
1997-06-18
1999-05-11
Dang, Hung Xuan
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Connectors
16228, G02C5/22
Patent
active
059033320
ABSTRACT:
A hinge, in particular for the lateral arms or the bridge of a metal wire, even rimless, spectacle mount; the hinge having a first portion defined by an end group of over one and a half (e.g. one and three-quarter) coils and formed by bending a first metal wire element of the mount, e.g. the connecting end of a lateral arm, and a second portion defined by a partially open toroid portion (at least one, even incomplete, coil or circle or ring portion) formed by bending one end of a second (fixed) metal wire element of the mount; the (partially open) coil or toroid portion of the second portion winding about an angle of over 180.degree. and being engaged internally by the group of coils of the first portion to permit free relative rotation of the group of coils in both directions; the group of movable coils and the fixed coil (or vice versa, the movable coil and the fixed group of coils) acting as a screw-nut screw connection; the fixed coil at one end (with or without a straight portion) forming a stop surface for arresting rotation of the lateral arm beyond the closed position; the movable coils of the lateral arm terminating with a straight portion parallel or not (to determine an opening stop angle of other than 90.degree.) to the lateral arm; and the straight portion cooperating as a stop surface with a branch of the mount to arrest rotation of the lateral arm in the fully open position.
REFERENCES:
patent: 5073020 (1991-12-01), Lindberg et al.
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