Patternless edger apparatus for ophthalmic lens grinders
AssigneeElision Technology Inc.
InventorS. Kim Kujawa
Life of this patent
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Abstract
A patternless edger apparatus is described which is mountable on mechanical pattern ophthalmic lens grinders. The apparatus has a mounting yoke adapted for mounting the apparatus in the place of the mechanical patterns to control the edge grinding of a lens blank. The mounting yoke includes a rotative spindle mount to interlock with the grinder pattern chuck and a mounting shaft releasably receivable in the spring clip bore of such lens grinders. A stored lens pattern and signalling from a grinder spindle rotational angle transducer are acted on by a microprocessor to control a motorized cam operative on the grinder pattern reaction surface to control the grinder to grind a lens blank to a perimeter shape corresponding to the stored lens pattern.
Claims16
A patternless edger tool for mounting on a manual pattern ophthalmic lens grinder machine comprising:
- a mounting yoke with means for coupling said yoke to a manual pattern ophthalmic lens grinder bevel edger;
- a spindle rotatively disposed within said yoke for mounting on a pattern mount of said bevel edger;
- an actuator cam retractably extending from said yoke for contact with a pattern reaction surface of said bevel edger;
- a motor and means for coupling same to said actuator cam
- a controller for controlling said motor in response to the rotational position of said spindle including storage means to record a stored lens pattern;
- means for updating said stored lens pattern;
- whereby a lens blank mounted in said manual pattern ophthalmic lens grinder machine will be ground to a perimeter shape corresponding to said stored lens pattern.
A patternless edger tool for mounting on a manual pattern ophthalmic lens grinder machine comprising:
- a mounting yoke with means for coupling said yoke to a manual pattern ophthalmic lens grinder bevel edger;
- a spindle rotatively disposed within said yoke for mounting on a pattern mount of said bevel edger;
- an actuator cam retractably extending from said yoke for contact with a pattern reaction surface of said bevel edger;
- a motor and means for coupling same to said actuator cam
- a controller for controlling said motor in response to the rotational position of said spindle including storage means to record a plurality of stored lens patterns;
- means for selecting one stored lens pattern from said plurality of stored lens patterns;
- whereby a lens blank mounted in said manual pattern ophthalmic lens grinder machine will be ground to a perimeter shape corresponding to said selected lens pattern.
Dependencies are inferred from the claim text.