Spectacle frame and conversion accessories therefor

Details Spectacle frame and conversion accessories therefor Spectacle frame and conversion accessories therefor

1980-12-08

1983-09-20

Evans, F. L.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Floating or underwater type

2440, 351 41, 351 83, 351158, G02C 500

Patent

active

044052120

ABSTRACT:
The invention provides a spectacle frame having on its inner (rear) face a circumferential channel, and frame-to-face seals carrying a mating ridge on the outer (forward) face of each seal. The spectacle frame is converted to an air-vented safety goggle, to a watertight swimmer's goggle or to an underwater diving mask by mating the appropriate frame-to-face seal with the channel in the frame; the frame can carry plano or prescription ground lenses and may be provided with temples or with an elastic headband.

REFERENCES:
patent: 2393533 (1946-01-01), Heinz
patent: 4256386 (1981-03-01), Herbert
Mechanix Illustrated, Jun. 1959, p. 61.

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