Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1998-12-03
2000-11-21
Manuel, George
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
A61B 302
Patent
active
061492752
ABSTRACT:
An optical lens selection apparatus by which an individual who engages in an activity such as welding, machining, wood working or the like, and who wishes to obtain enhanced viewing of a work piece may readily choose an appropriate lens for use with a protective eye mask. The apparatus of the present invention is comprised generally of: a box-like casing; a lens evaluation compartment fixed to the casing; a drum member situated within and movably attached to the lens evaluation compartment; a plurality of slide-like plates, each of the slide-like plates being provided with an optical lens, the plurality of slide-like plates being fixed to the drum member; and a viewing means releasably attachable to the lens evaluation compartment for use with the drum member and the plurality of optical lenses fixed thereto. A user of the apparatus may evaluate the optical lenses to find the most suitable of them by rotating each lens into alignment with the rectangular opening and viewing the rear wall of the casing compartment and then selecting the desired lens for insertion into a eye mask from any one of a number of lens storage compartments provided on the front panel of the apparatus.
REFERENCES:
patent: 4027954 (1977-06-01), Good
patent: 4452515 (1984-06-01), Lewis
patent: 4740072 (1988-04-01), Griffin et al.
patent: 5223864 (1993-06-01), Twisslman
patent: 5650839 (1997-07-01), Sims
Mack Products Co.
Manuel George
LandOfFree
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