Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Continuous rim mounting
Patent
1978-03-23
1980-04-08
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Continuous rim mounting
351 47, 351154, 2443, G02C 100, G02C 900, G02C 500
Patent
active
041969820
ABSTRACT:
A plastic frame safety spectacle of the type provided with removeable concavo-convex lenses has a variable-depth lens channel formed in the respective plastic rims, each channel being configured to complementally receive a lens periphery whereby the lenses are securely held in position within the rims yet may be removed or replaced using only manual pressure and without requiring heating or other special processing of the frame. Each lens channel is continuous around its respective rim, gradually and progressively becoming deeper as the upper portion of the rim is approached such that maximum restraining is provided for the lenses along the top rims where deformation is most likely to occur from twisting or bending of the spectacle frame. The back portion of each rim is provided with a lens-engaging support ledge to preclude removal of the lenses from the backside of the frame thereby seating the lenses against dislodging by frontal impact.
REFERENCES:
patent: Re16233 (1925-12-01), Stevens
patent: 1241716 (1917-10-01), Day
patent: 1520977 (1924-12-01), Stevens
patent: 1520978 (1924-12-01), Stevens
patent: 1520979 (1924-12-01), Stevens
patent: 1545529 (1925-07-01), Stevens
patent: 1600606 (1926-09-01), Stevens
patent: 2276102 (1942-03-01), Schwartz
patent: 2427918 (1947-09-01), Malcom et al.
patent: 2918570 (1959-12-01), Diedring
patent: 3453042 (1969-07-01), Cooper
American Optical Publication, Polysnap Lenses (advertising literature, 8/77).
Bovernick Rodney B.
Corbin John K.
Parmelee Industries, Incorporated
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