Impregnable locking system

Impregnable locking system for the fastening of display boxes called "blisters" consisting of a box of two halves having on a side opposite a hinge thereof fastening flaps intended to be held one against the other, comprising in combination a clip arranged to cover said flaps, and between which there is attached a transverse shaft;

• a notch formed in the flaps allowing said shaft to pass through when said clip is put into place, two gears being slid onto said shaft between an outer side of each flap and a corresponding side of said clip, means being provided so that said gears are constantly pushed towards each other, and once said clip is placed on said flaps, said gears come to rest in lodgings made in outer sides of the flaps, thereby immobilizing the clip onto said flaps, external means being provided to push said gear in an opposite direction to take them out of said lodgings so as to allow the extraction of said clip and to free the flaps of the blister to allow its opening, and wherein the hinged halves of the housing are in the shape of shells forming, respectively, a bottom and a cover, which together provide an opening adapted to let through the neck of a bottle to be protected against theft, the pair of shells forming a recess for a strong wire whose ends are fastened to said bottom and crossed so as to form a loop in the position of the said opening, means tightening up and locking said loop around said neck being fitted slidingly in the said recess so as to be brought into a position where it applies its tightening and locking action irreversibly, when said housing is closed, and is free to abandon this position so as to release the neck when the housing is opened.