Gear cutting – milling – or planing – Milling – With regulation of operation by templet – card – or other...
Patent
1991-03-01
1992-10-27
Howell, Daniel W.
Gear cutting, milling, or planing
Milling
With regulation of operation by templet, card, or other...
51101LG, 51284E, 409104, B23C 300
Patent
active
051584220
ABSTRACT:
The preferred embodiment is directed to a lens shaper and finisher which can readily accommodate large sized lens blanks. The preferred embodiment includes a chuck for supporting a lens blank and a lens pattern. A cutter is operably associated with the chuck. A plurality of piston and cylinder assemblies displace the chuck relative to the cutter between a first position wherein the lens blank is removed from the cutter and a second position wherein the lens blank engages the cutter. A control device is operably connected to a least one of the piston and cylinder assemblies to vary the rate at which the lens blank is fed to the cutter. Accordingly, the feed rate may be readily adjusted such that during a rough cutting cycle a lens blank is fed at a slower rate than during a finish cutting cycle to reduce the likelihood of shattering of the lens blank during the cutting process.
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Berenato, III Joseph W.
Howell Daniel W.
National Optronics Inc.
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