Flexible bar for spectacles and manufacturing method

Details Flexible bar for spectacles and manufacturing method Flexible bar for spectacles and manufacturing method

1989-11-14

1991-03-12

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Temples

351121, 425595, G02C 516, G02C 514

Patent

active

049990080

ABSTRACT:
The present invention concerns a bar for spectacles formed in two parts of relatively stiff plastic material, joined together by means of an elastic springing element in the form of a spiral spring. According to the invention, said elastic element also comprises a flat spring with surface positioned on a vertical plane, said spiral spring being wound in tight coils around a central part of said flat spring and being checked on opposite sides by two stop rings, the end parts of said flat spring forming means of anchorage into the two bar portions of plastic material.

REFERENCES:
patent: 4377328 (1983-03-01), Ferrandi

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