Turning – Axial pattern – Pivoted tool rest
Patent
1981-10-09
1984-06-26
Kazenske, E. R.
Turning
Axial pattern
Pivoted tool rest
200 16B, B23B 328, B23Q 1500, H01H 1500
Patent
active
044559011
ABSTRACT:
A device for controlling the thickness of a contact lens produced on an automatic and computerized numerically controlled (CNC) lathe is disclosed. A sensor control device is incorporated on a lens lathing machine for engaging the front surface of a lens button upon which the convex surface of the contact lens is to be machine lathed. Immediately upon contact between the sensor and the front surface, the sensor provides for breaking an electrical circuit in the lathe controller providing for automatic position registration of the lens button front surface relative to the cutting tool and its pivot point, and a lens of desired center thickness and power curve radius is subsequently generated. Close tolerances and high repeatability are domonstrated in contact lenses lathed generated by these principles.
REFERENCES:
patent: 3704641 (1972-12-01), Rhoades
patent: 3746955 (1973-07-01), Kobayashi
patent: 3834256 (1974-09-01), Abbatiello
patent: 4083272 (1978-04-01), Miller
patent: 4202226 (1980-05-01), Becker et al.
patent: 4225758 (1980-09-01), Kondo et al.
patent: 4264249 (1981-04-01), Dawson
patent: 4313355 (1982-02-01), Becker et al.
Bausch & Lomb Incorporated
Bogdon Bernard D.
Heyrana Sr. Paul M.
Kazenske E. R.
Norton John S.
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