Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Floating or underwater type
Patent
1990-06-18
1992-12-08
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Floating or underwater type
351158, 2430, G02C 100, A61F 902
Patent
active
051701901
ABSTRACT:
A water sportsman's face mask for enabling a swimmer on or below the surface of a body of water to view objects which lie substantially above or below his normal line of vision without rotation of the swimmer's head or body. The mask comprises a frame, a lens mounted in the front of the frame, a flexible seal attached to the rear of the frame for forming a water-tight seal between the frame and the face of the swimmer, an adjustable strap for attaching the mask to the swimmer's head, and a pair of triangular prisms mounted on the lens which enable the swimmer to view objects above or below the swimmer's normal line of vision. One face of the prism is mirrorized and is in oblique relationship to the lens. In one embodiment of the invention the prisms are rotatably mounted to the frame and are selectively adjustable to a forward operative position and to a rearward inoperative position.
REFERENCES:
patent: 2123682 (1938-07-01), Wingate
patent: 2358348 (1944-09-01), Pierson
patent: 2594698 (1952-04-01), Thomas
patent: 2618199 (1952-11-01), Evans
patent: 2909959 (1959-10-01), Girden
patent: 4704014 (1987-11-01), Carner, Jr.
patent: 4717249 (1988-01-01), Fischer
patent: 4795235 (1989-01-01), Spitzberg
Bovernick Rodney B.
Rhodes Alex
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