Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1975-11-28
1977-06-14
Chatmon, Jr., Saxfield
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
351 19, 351 28, 351 58, 351178, A61B 304
Patent
active
040294021
ABSTRACT:
An optical aid for use in the selection of spectacle frames is in the form of a trial lens mount having a lens holder with a plurality of resilient arms extending outwardly therefrom which carry at their extremities members which engage a lens-retaining groove of a spectacle frame. Each of a set of such optical aids has a lens of different power, and the appropriate aid can be fitted in a desired frame to enable the subject to view the frame himself. The arms are of different lengths and enable the mount to be used in frames of a multitude of different sizes.
REFERENCES:
patent: 1717224 (1929-06-01), King
patent: 1884371 (1932-10-01), Swart
patent: 2872843 (1959-02-01), Kono
"Lens Insert" The Optical Journal & Review of Optometry, vol. No. XC, Issue No. 19, p. 19, 10/1/1953.
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