Machines for grinding and bevelling ophthalmic glasses

Details Machines for grinding and bevelling ophthalmic glasses Machines for grinding and bevelling ophthalmic glasses

1988-03-02

1989-05-16

Smith, James G.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51284E, 5116575, B24B 1700

Patent

active

048297151

ABSTRACT:
This machine comprises a carriage movable in translation and in oscillation in a direction parallel to and perpendicular to a shaft carrying trimming and bevelling grinding wheels, and further comprises a tracer (7) adapted to come in contact with the edge of a trimmed blank (3) of the glass in a direction perpendicular to this edge, and adapted to measure the distance L1 of the edge of the front side of the glass (3) relative to the edge of a planar glass in respect of which L1=0, and the value L2 which corresponds to the thickness of the edge of the glass. The tracer (7) has a curvature which is identical to and concentric with the curvature of the grinding wheel (4, 11) and formed by a plurality of parallel elements (9) acting on a sensor (10).

REFERENCES:
patent: 4596091 (1986-06-01), DaBoudet et al.
patent: 4667444 (1987-05-01), Langlois et al.

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