Lock adapted to be accommodated within the thickness of an opening panel

A lock adapted to be accommodated in the thickness of an opening panel, adapted to be operated from each side of said opening panel by an operating member and a key, and adapted to allow retraction of a latch bolt from the outside only by means of a key, said lock including a casing and two nuts rotatable about a common axis and attached to a respective corresponding operating member, wherein:

• each nut is adapted to turn freely about its axis relative to the other nut,
• said latch bolt is attached to a selector member mobile in a transverse direction corresponding to the thickness of a casing of said lock between two predetermined positions, and
• each nut is attached to corresponding means of said lock adapted to engage with said selector member when the latter is in a position close to said nut to actuate said latch bolt when said nut is turned in a first direction corresponding to retraction of said latch bolt and to remain disengaged from said selector member when the latter is in its other position near the other nut.