Abstract: Visualization systems are provided which are intended to be worn by the head of a user wearing an audio headset consisting of a first hoop and two lateral earpieces, the visualization system comprising at least one headband in the form of a strap and a visualization device mounted on the headband. The headband comprises two symmetrical lateral hasps, each hasp being in the form of an arch so as to form an opening of a few centimeters between the arch and the head of the user so that, when the system is worn by the head, the opening is sufficient to allow the passage of one of the two lateral arms of the first hoop.

Abstract: Visualization systems are provided which are intended to be worn by the head of a user wearing an audio headset consisting of a first hoop and two lateral earpieces, the visualization system comprising at least one headband in the form of a strap and a visualization device mounted on the headband. The headband comprises two symmetrical lateral hasps, each hasp being in the form of an arch so as to form an opening of a few centimeters between the arch and the head of the user so that, when the system is worn by the head, the opening is sufficient to allow the passage of one of the two lateral arms of the first hoop.

Abstract: The invention relates to headsets comprising at least a supporting shell and a moving visor that can be displaced between two extreme positions. The headset includes a system for securing the visor in any position between the two extreme positions by friction between the visor and the supporting shell, the friction being produced by at least one microfibre felt element. The invention applies to the field of headsets in general for users of motorized craft such as in aeronautics and automobiles for example.

Abstract: The invention relates to the field of liquid crystal optical display heads. The invention is a liquid crystal optical display head comprising a casing (1) in which there are one or more lamps (6), one or more covers (7) surrounding the lamp or lamps (6) and at least one heat sink (8), the heat sink (8) being made as one piece from a heat conducting material and directly connecting the cover or covers (7) to the outside of the casing (1). The invention may especially be applied to liquid crystal optical display heads mounted on an aircraft instrument panel.

Abstract: The invention relates to a helmet with retractable visors for fast day/night reconfiguration. For that, the helmet (1) is designed at the articulations of the visors to allow the use of articulations that can be disassembled without tools. The day visor (15) is thus made modular and removable and is mounted on the helmet by a translational movement in a direction (F) allowing the upper part (16) to engage in a saggital guide rail of the helmet and allowing rotation axes of the helmet to engage in the articulation part of the lateral arms (8) of the visor, locking being effected by hand using a pivoting lever (8). For night missions, the day visor is removed and replaced with a night module mounted on the helmet using the same type of articulation. The invention applies in particular to helmets for aircraft pilots, allowing unprepared ejection.

Abstract: The invention relates to the field of liquid crystal optical display heads.

Abstract: A device for locking a position of a moving part with respect to a fixed part. The moving part is positioned with respect to the fixed part isostatically. The device generates a force opposing the loss of contact of all the points of isostatic contact between the moving part and the fixed part so as to lock the position.

Abstract: The invention relates to a helmet with retractable visors for fast day/night reconfiguration.

Abstract: The polysiloxane network (1) of this polymeric material is formed by (1a) at least one .alpha.,.omega.-dihydroxylated polydimethylsiloxane and/or an .alpha.,.omega.-dihydroxylated poly(dimethyldiphenyl)siloxane containing at least 70% of dimethylsiloxane units; (1b) a crosslinking agent and/or a bridging agent ensuring the crosslinking as well as a bond between the networks; optionally (1c) a polycondensation catalyst. The acrylic network (2) is formed by (2a) at least one (meth)acrylic monomer containing no hydrophilic functional group; optionally (2b) a crosslinking agent and (2c) a radical polymerization initiator. The polymerization mixture contains all these constituents and sufficient inhibitor of free radical formation to prevent, at the outset, the initiator (2c) producing radicals which, combined with the catalyst (1c) would annihilate the catalytic properties of the latter, to form the network (1) before the network (2). Application: manufacture of articles of all shapes.