Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Connectors
Patent
1980-05-20
1982-07-13
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Connectors
351 90, G02C 522, G02C 108
Patent
active
043391796
ABSTRACT:
An eyeglass frame having open ended rims closed by screw assemblies for clamping lenses therein is disclosed. Each screw assembly comprises a machine screw having a head which defines a bearing surface, a nut threadedly engageable with the threaded shank of the screw, and integrally formed with a lug at one end of the open rim, and an insert member integrally formed with a lug at the other end of the open rim and having a cooperable bearing surface. Dog clutches are formed on the bearing surfaces and preferably comprise alternating projecting portions and recesses in an annular array. The dog clutches normally prevent loosening of the screw assembly by limiting the degree of relative angular displacement between the bearing surfaces, but the gap between the lugs and the resilience of the rims permits unscrewing of the assembly to remove the lens without damaging any of the parts of the assembly.
REFERENCES:
patent: 1576870 (1926-03-01), Stevens et al.
patent: 2037586 (1936-04-01), Olson
patent: 3438416 (1969-04-01), Thurston
patent: 3802475 (1974-04-01), Gerlach
Bovernick Rodney B.
Brown Charles E.
Corbin John K.
Essilor International "Cie Generale d'Optique
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