Machine for grinding of toric surfaces on optic lenses

Details Machine for grinding of toric surfaces on optic lenses Machine for grinding of toric surfaces on optic lenses

1985-04-24

1987-03-31

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

511255, B24B 1300

Patent

active

046532331

ABSTRACT:
A machine for grinding of toric surfaces on optic lenses. A holder is provided for a lens (L.sub.1) and is pivotally supported in a carriage of a compound support of two carriages. A swivel arm is secured to a pivot of a holder. The swivel arm is pivotal about a movable bearing. A holder for a grinding spindle with cup tool thereon is supported on the machine frame by means of a bearing ring. During a movement of the compound carriage, the workpiece holder moves due to the guiding of the swivel arm on a circular path, the radius of which determines the base curve of the torus surface. By supporting the weight of the holder through a compound support on the machine frame, bending stresses of the swivel arm are avoided, through which a high precision machining operation is achieved.

REFERENCES:
patent: 2556604 (1951-06-01), Suddarth et al.

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