Extensible charnela for metal glasses. (Machine-translation by Google Translate, not legally binding)

摘要

Extendable hinge for metal goggles, characterized in that it is constituted by a box-like piece, open at its front end, which is incorporated into the inner face of the lug, and which has a transverse groove at its base that communicates with its internal hollow, staying inside said box, without possibility of turning inside it, a hollow stem, in. The inside of which is also housed a spring attached by one of its ends to two parallel ear cups that, like a head of the aforementioned stem, protrude out of the box so that they can be conveniently articulated to the means for this purpose provided in the frame of the saddle is inserted into the transverse slot of the repeated box a plate that is imprisoned between it and the pin and that, through an opening or window made in the wall of the rod, is embedded in the spring housed inside, keeping one and the other retained inside the box although without preventing the play of the spring in sufficient degree to absorb any opening effort of the upper pin the normal. (Machine-translation by Google Translate, not legally binding)