Eyeglass frame with locked screw joint

Details Eyeglass frame with locked screw joint Eyeglass frame with locked screw joint

1988-10-26

1990-02-27

Dzierzynski, P. M.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Connectors

351153, 16228, G02C 512, G02C 522

Patent

active

049040774

ABSTRACT:
This invention relates to a locked screw joint for connecting two eyeglass members, particularly members of a closing block or a hinge of an eyeglass frame. A bore is provided with screw threads at one end and is provided at its other end with an abutment for the head of a hinge screw, which abutment consists of a flat surface or of a counterbore. The locked screw joint can be opened and reconnected, as is required in the manufacture and use of eyeglass frames. This is accomplished in that a conical elevation surrounding the bore is provided on the abutment surface for the screw head, the inner edge of the shank of the screw has a conical constriction under the screw head and as the shank is screwed in the conical elevation is deformed to extend into and is locked in the constriction.

REFERENCES:
patent: 4339179 (1982-07-01), Dany
patent: 4776685 (1988-10-01), Jeunet

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