B - Operations – Transporting – 24 – B
Patent
B - Operations, Transporting
24
B
51/17
B24B 9/14 (2006.01) B24B 13/02 (2006.01)
Patent
CA 1226140
ABSTRACT There is described an apparatus for polishing or fin- ing spherical or toric surfaces of ophthalmic lenses. The apparatus has a frame and means is connected to the frame providing an orbital break-up motion of a tool having a polishing surface of a selected base curve and cross curve. Further means is connected to the frame for providing a smooth Lissajous figure motion to a lens of generally common base curve and cross curve with the tool. The means for providing the Lissajous figure motion includes means connected to the frame for mechanically supporting the lens for reciprocation in an X direction and simultaneous reciprocation in a Y direction. Furthermore means is connected to the frame for driving the supporting means in an X direction of reciproca- tion, which means includes a first cam means operably connec- ted to the supporting means and means for rotating the first cam. Means is connected to the frame for driving the means for supporting in a Y direction of reciprocation this last- mentioned means including a second cam means and means for rotating the second cam means. Simultaneous rotation of the first cam means and second cam means produces simultaneous X movement and Y movement of the lens with respect to the tool in a generally smooth Lissajous figure.
459222
Coburn Optical Industries Inc.
Smart & Biggar
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