Window or door positioning mechanism - has connecting slot concentric to auxiliary arm hinge, and including acute angled extension

摘要

There is an extension arm hinged on the fixed frame of the window or door. Sliding on the tilting and swivelling wing auxiliary arm is hinged to the wing and extension arm, a curved slot being engaged by a setting member movable by a wing handle. The curved slot (15) consists of a connecting slot (153), aligned concentrically to the hinge point (12) of the auxiliary arm (11) on the wing, together with a continuation running at an acute angle to the long section (152) of the slot.