Method of forming a convergent lens in a plate of transparent mi

Details Method of forming a convergent lens in a plate of transparent mi Method of forming a convergent lens in a plate of transparent mi

1984-04-02

1986-04-29

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51124L, B24B 100

Patent

active

045847991

ABSTRACT:
A method is described of forming a circular convergent lens in a plate of transparent mineral material, which involves grinding the lens with a grinding member having a lesser diameter than the lens and imparting an oscillatory motion to the plate relatively to the grinding wheel.
This method also enables self-dressing of the grinding member.

REFERENCES:
patent: 1491383 (1924-04-01), Dey
patent: 1515681 (1924-11-01), Hill
patent: 1563918 (1925-12-01), Parsons
patent: 2336322 (1943-12-01), Uhlemann
patent: 2747339 (1956-05-01), Schelling
patent: 2975565 (1961-03-01), Phillips
patent: 2977724 (1961-04-01), Kennedy et al.
patent: 4494338 (1985-01-01), Nagaura

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