Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1975-08-27
1978-10-10
Dixon, Harold A.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
351 47, 351 57, G02C 712
Patent
active
041193695
ABSTRACT:
An ophthalmic device comprising superposed pairs of light polarizing elements, one pair of such elements being fixed and the other pair being rotatable with respect to the fixed pair to provide a variable light transmission feature. The fixed pair of elements is retained by a frame member having an arcuate peripheral portion which engages a rotatable light polarizing element biasing means which is fixedly attached to each rotatable light polarizing element and prevents substantial axial movement of the rotatable light polarizing element.
REFERENCES:
patent: 1614827 (1927-01-01), Coats
patent: 1661967 (1928-03-01), Savoie
patent: 2005426 (1935-06-01), Land
patent: 2206880 (1940-07-01), Cozzens
patent: 2251330 (1941-08-01), Fairbanks
patent: 2304504 (1942-12-01), Metzger
patent: 2380481 (1945-07-01), Tillyer
Eloranta Vaito K.
Ruggles, Jr. Benjamin C.
Dixon Harold A.
Mervis Stanley H.
Polaroid Corporation
Rothstein Sheldon W.
LandOfFree
Variable density ophthalmic device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable density ophthalmic device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable density ophthalmic device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1764639