Apparatus for tracing the lens opening in an eyeglass frame
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United States of America Patent
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-
Feb 16, 1988
Grant Date -
N/A
app pub date -
Aug 14, 1986
filing date -
Aug 14, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for tracing the inner periphery of an eyeglass frame lens opening and for producing a set of coordinates each of which coordinate set describes a sensed position along the traced path. The eyeglass frame is positioned on an overhead bridge and a stylus held by a stylus holding fixture engages the eyewire groove of the lens opening and is used as a guide to move the fixture along the traced path. Encoding arms are coupled to the fixture and drive respective associated rotary encoders whose outputs represent the distance each arm has moved from a first to a second sensed location along the path. A computer operates in accordance with an instruction set to generate coordinates for each of the sensed points along the traced path whereby the set of coordinates characterizes the size and shape of the lens opening.
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