Support structure for protective mask optical insert

Details Support structure for protective mask optical insert Support structure for protective mask optical insert

1985-06-18

1987-12-08

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351158, 351 41, 2444, G02C 508, G02C 100, A61F 902

Patent

active

047115394

ABSTRACT:
An optical lens carrying support structure for use with a protective face mask, comprising a pair of lens frames, each frame comprising an eyewire and a hinge portion, the lens frames being connected by a hinged nosepiece. The support structure attaches to the face mask by a slideably releasable dove-tail connection to a trapezoidal back-block, which back-block rigidly attaches to the face mask, with two opposite faces of the trapezoidal back-block inclined with respect to each other so as to establish the proper pantoscopic angle. The face-form angle is accomplished by virtue of an angled relation of the eyewire to the hinge portion of the lens frame. The lens frames fold back toward each other, facilitating removal of the lenses and folding the face mask assembly flat.

REFERENCES:
patent: 1171750 (1964-06-01), Wulkow
patent: 1230555 (1917-06-01), Brennecke
patent: 2905172 (1959-09-01), Rodenstouse
patent: 4542965 (1985-09-01), Shedrow
Ballistic Eye Protection, 11/16/78; drawings 000.1 and 000.2, "The Industrial Smok Spec Safety Spectacle." Scuba Spec, Inc.

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