Automatic lens edger

Details Automatic lens edger Automatic lens edger

1981-10-02

1984-01-03

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

5116571, B24B 914

Patent

active

044235690

ABSTRACT:
An apparatus for edging the periphery of an ophthalmic lens to a predetermined outline or edge configuration, is characterized by a pair of grinding wheels, one for rough grinding or shaping the lens and the other for peripherally beveling the edge of the lens, a workholder for supporting and rotating the lens and mechanisms for moving the rotating lens into engagement with the grinding wheels. Manual controls are on the apparatus and automatic control circuitry is in a module remote from but electrically connected with the apparatus, whereby the apparatus may be manually and/or automatically controlled to only shape a lens, to only bevel edge a lens or to both shape and bevel edge a lens. In normal operation, the manual and automatic controls cooperate to control the apparatus in the edging of lenses, but circuitry is provided to enable lenses to be edged completely under manual control in the event of a failure of the automatic circuitry, so that failure of the automatic circuitry does not disable the apparatus.

REFERENCES:
patent: 2651890 (1953-09-01), Rubinstein
patent: 3332172 (1967-07-01), Stern
patent: 3461619 (1969-08-01), Hurlbut
patent: 3745720 (1973-07-01), Savage
patent: 4274231 (1981-06-01), Verega

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