Lens generating apparatus

Details Lens generating apparatus Lens generating apparatus

1979-09-21

1981-06-09

Smith, Gary L.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

B24B 1300

Patent

active

042716365

ABSTRACT:
Generating lens surfaces to true toric or spherical shapes with lens surfacing machinery employing a dual pivoting system and fixed radius cutter. Lenses are fed across the cutter along a first circular path developing the spherical component of a toric surface while the cutter is simultaneously swept orthogonally across the lens along a second circular path which develops the cylindrical component of the toric surface. Various combinations of spherical and cylindrical curvatures are produced by adjustment of radii of first and second circular paths.

REFERENCES:
patent: 1325789 (1919-12-01), Johnsson
patent: 2392478 (1946-01-01), Holman
patent: 2548418 (1951-04-01), Bernheim
patent: 2633675 (1953-04-01), Ellis
patent: 2724218 (1955-11-01), Dillon
patent: 3117396 (1964-01-01), Dalton
patent: 3492764 (1970-02-01), Dalton
patent: 3624969 (1971-12-01), Dalton
patent: 4018206 (1977-04-01), Highberg

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