Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Bridges
Patent
1977-12-15
1980-05-27
Culver, Horace M.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Bridges
29 20, 264222, G02C 502, B29C 102
Patent
active
042047501
ABSTRACT:
A method of custom fitting eyeglass frames to the nose of a wearer, which is in part performed by an optician or the like and in part performed by an eyeglass frames laboratory. The optician or the like heats a preferably horseshoe shaped wax wafer until it is moldable, then positions such on the bridge area of the wearer's nose and applies pressure thereto, bending the wafer concavely to conform its shape to that of the bridge of the nose. The eyeglass frames are then situated against the convex surface of the wafer in their normal viewing position and an imprint of the nose bridge portion of the frames is made on the outer surface of the wax wafer. Finally, the wax pattern thus formed is removed from the frames and wearer's nose and cooled to fix its shape, and the outline of eyeglass frames bridge is drawn thereon. The resulting wax pattern is then sent to an eyeglass frames laboratory and a plastic nosepiece is there fabricated by a two-step dental stone casting procedure, which renders the plastic nosepiece a precise replica of the wax pattern. The finished plastic nosepiece is returned to the optician for attachment to the eyeglass frames. With this nosepiece in position on the bridge of the wearer's nose, the optician performs the final adjustment with the eyeglass frames in the normal viewing orientation, and a quick setting adhesive or the like is used to attach the finished nosepiece to the bridge portion of the eyeglass frames.
REFERENCES:
patent: 2308200 (1943-01-01), Nerney
patent: 2682196 (1954-06-01), Baldanza
patent: 3189913 (1965-06-01), Hoffmaster
patent: 3233956 (1966-02-01), Angelis
patent: 3345737 (1967-10-01), Gordon
patent: 3476468 (1969-11-01), Fortenberry
patent: 3701592 (1976-10-01), Fernandez
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