Blocked lens thickness gauge

Details Blocked lens thickness gauge Blocked lens thickness gauge

1985-05-17

1987-06-23

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

33507, G01B 520

Patent

active

046741909

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.

REFERENCES:
patent: 2646627 (1953-07-01), Tillyer et al.
patent: 2834115 (1958-05-01), Bachmann
patent: 3645002 (1972-02-01), Hefti
patent: 3848339 (1974-11-01), Strasbaugh
patent: 3861048 (1975-01-01), Thompson
patent: 4010548 (1977-03-01), Iwasaki
patent: 4075763 (1978-02-01), Yamaryo
patent: 4137640 (1979-02-01), Parks
patent: 4557076 (1985-12-01), Helbrecht

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