Geometrical instruments – Gauge – Lens
Patent
1993-08-12
1995-03-07
Will, Thomas B.
Geometrical instruments
Gauge
Lens
33644, 33672, G01B 500
Patent
active
053946170
ABSTRACT:
An apparatus for locating the geometrical center of a lens, whether in or out of an eyewear frame, includes a flat platform adapted to seat an eyewear lens thereon and a framework mounted on the platform and having first and second pairs of opposite side members extending in substantially orthogonal relationship to one another and intersecting with one another so as to define a substantially rectangular enclosure having first and second pairs of diagonal corners. The side members of the pairs thereof are mounted to the platform for undergoing relative movement so as to adjust the distances therebetween and thereby the length and width of the enclosure to fit about the lens seated on the platform. The apparatus also includes a plurality of positioning elements each mounted to one of the side members of the first and second pairs thereof for undergoing slidable movement therealong so as together to engage and retain the lens on the platform within the rectangular enclosure, and a pair of cross members pivotally coupled to the framework at the pairs of diagonal corners thereof such that the cross members extend diagonally across the enclosure and intersect with one another at a center point of the enclosure and thereby at the geometrical center of the lens seated on the platform within the enclosure.
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"The Boxing System of Lens and Frame Measurement", Reprinted from The Optical Journal and Review of Optometry, pp. 1-14, Jul. 1961.
Flanagan John R.
Will Thomas B.
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