Abstract: An expansion joint connecting the ends of two pipes adapted to convey a hot fluid, each end having an end flange, includes a sleeve fastened at its respective edges to a cold flange fastened to a nesting device and a coupling arrangement connecting the end flange and the corresponding cold flange. The coupling arrangement comprises at least two members connected together, one fastened to the cold flange and the other fastened to the end flange. A first member is a corrugated sheetmetal sleeve the undulations of which are parallel to the longitudinal direction of the pipe and a second member is flexible and deformable in the longitudinal direction of the pipe.

Abstract: A control for a device of the type comprising at least one electronic measuring head supported by a structure composed of several elements that are capable of being displaced along the three axes X, Y and Z driven by means of electric motors 12 to 14 having a speed regulator and a control means for supply circuits 12a to 14a of the above motors.According to the invention, the manual control comprises at least one control assembly 20 mounted on an element of the structure and having a single lever for actuating a harness that detects the displacements of said lever by use of sensors 30 to 37 mounted thereon and convert the displacement into voltages a, b, c and d.

Abstract: Display adapted to the local configuration, so that it does not cause a mask during observation. It comprises an entirely transparent optical module grouping a spherical mirror, which is preferably a partly transparent diffractive optics used on the axis, and a partly transparent flat mirror inclined with respect to the axis. The mirrors are joined at the bottom by a bonded plate and assembled at the top by a thin part, whose faces pass through the centre of the spherical mirror. The electronic part is essentially located in a case, whose shape is such that it is located in the natural mask of a pillar of the cockpit. The display is also used for helmet displays.