Abstract: The object of the invention is a device for locating a rupture represented by at least one break line (22, 24, 36, 38, 40) in a transparent panel (10) comprising at least two panes (12, 14; 26, 28, 30), particularly of the windshield of the cockpit of an aircraft, characterized in that it comprises an opaque or semi-opaque obstacle (20, 32, 34) disposed between two adjacent panes. The invention also covers a panel equipped with such a device.

Abstract: A method for manufacturing adhesive elements intended to be applied to a three-dimensional surface for the purpose of decorating it involves, starting from a three-dimensional model representing the surface to be decorated and physical references thereof, and a two-dimensional model constituting a projected "image" of the decoration, referencing the two-dimensional model in relation to the references of the three-dimensional model, carrying out projection computations so as to obtain a three-dimensional representation of the decoration referenced on the three-dimensional surface, and carrying out laying-out computations for this three-dimensional representation. Adhesive elements are then obtained by a cutting process driven from the computation data, and the references are marked on at least some of these elements by tracing driven from the data.

Abstract: A composite material tube, withstanding the internal pressure, and comprising at least two layers of pressure reinforcement fibers, or pressure resistant layers, wound at an angle at least equal in absolute value to 70.degree., with respect to the center axis of the tube. The two layers both undergo radial expansion under an effect of the pressure, with one of these two layers being inside the other. A circumferential modulus of elasticity of the external layer is greater than the circumferential modulus of elasticity of the internal layer.

Abstract: A process for manufacturing a line of variable stiffness over part of the length thereof and the associated element which allows the line to have the variable stiffness thereof is disclosed. The element is integrated during the manufacturing of the line or deposited thereafter around the line; the element consists of composite material underlayers in which the directions of the fibers have at least one component making a zero or a low-value angle with the axis of the pipe, and the layers end in a graded way. The process has application to the manufacturing of a riser base.

Abstract: The semi-finished product according to the invention consists exclusively of liquid crystal thermoplastic polymers (LCP), whereof at least one first liquid crystal thermoplastic polymer (LCP) is in the form of fibers (18) and has a given melting point, and whereof at least one second liquid crystal thermoplastic polymer (LCP) (16) has a melting point below that of the first LCP. This semi-finished product is in particular a fabric. By simply heating under pressure at a temperature equal to the melting point of the second LCP, followed by cooling, a composite material with improved mechanical and physicochemical performance characteristics are obtained.