Blocked lens thickness gauge

Details Blocked lens thickness gauge Blocked lens thickness gauge

G - Physics

01

B

33/193

G01B 5/00 (2006.01) G01B 5/06 (2006.01)

Patent

CA 1258368

ABSTRACT OF THE DISCLOSURE 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.

509301

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