Abstract: A device for connecting two portions of a cremone-bolt mechanism related to parts having a different diameter of the leaf of a tilting window of the porthole type, comprising: a flat guide applied astride the two parts with a different diameter of the frame of the leaf, a longitudinal lamina slidable within the flat guide astride the two parts, a connection for the longitudinal lamina to the two mechanism portions of the two parts of the leaf. The flat guide is formed by at least three separate portions, of which a first portion to be fixed to a first one of the two parts, a second portion to be fixed to the second of the two parts, and a third inclined portion for connecting together the first and second portions.

Abstract: A lock comprising, within a box-like supporting body and associated with actuation elements which are available to the action of the user and/or of other devices, three locking beaks: two first lateral ones, whose free tips are shaped so as to form mutually opposite claws which lie on the plane of the closure and opening movement, and a third central beak, which is kinematically connected and coordinated with respect to the two first beaks and is provided, at its free tip, with at least one locking element. The three beaks define, in association with the actuation elements, at least two stable working positions: a first open position, in which the beaks lie substantially completely within the box-like supporting body, and a second closed position, in which the beaks protrude from the box-like supporting body with their free tips so as to lock the components with which they are associated.