Blocked lens thickness gauge
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United States of America Patent
Stats
-
Jun 23, 1987
Grant Date -
N/A
app pub date -
May 17, 1985
filing date -
May 17, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a blocked lens thickness gauge for measuring the thickness of a semi-finished lens that is blocked for surfacing of the concave side thereof. A lens contacting sensor shaft is supported between two sets of orthogonally mounted ball bearings and a needle shaft, the latter being supported on spring-loaded bearings such that the needle shaft is urged toward the lens contacting sensor shaft by the spring loading. A slipping clutch is also provided to allow the needle shaft to absorb inertia forces resulting from abnormal shocks.
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Cited Art Landscape
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