Abstract: The present invention relates to an impregnation process for a fibrous substrate, a liquid composition for implementing this process and the obtained impregnated fibrous substrate. The impregnated fibrous substrate is suitable for manufacturing mechanical or structured parts or articles. In particular the present invention deals with an industrial process for impregnating a fibrous substrate or long fibers with a viscous liquid composition containing mainly methacrylic or acrylic components. This viscous composition is called hereafter liquid (meth) acrylic syrup. The invention concerns also a fibrous substrate pre-impregnated with said syrup which is useful for manufacturing mechanical or structured parts or articles. More particular the impregnation of fibrous substrate with the (meth) acrylic syrup is achieved in a closed mould.

Abstract: The present invention relates to an impregnation process for a fibrous substrate, a liquid composition for implementing this process and the obtained impregnated fibrous substrate. The impregnated fibrous substrate is suitable for manufacturing mechanical or structured parts or articles. In particular the present invention deals with an industrial process for impregnating a fibrous substrate or long fibers with a viscous liquid composition containing mainly methacrylic or acrylic components. This viscous composition is called hereafter liquid (meth) acrylic syrup. The invention concerns also a fibrous substrate pre-impregnated with said syrup which is useful for manufacturing mechanical or structured parts or articles. More particular the impregnation of fibrous substrate with the (meth) acrylic syrup is achieved in a closed mould.

Abstract: The invention relates to an operating device comprising a rod which is able to move translationally along an axis with respect to a housing, about an equilibrium position. The invention finds particular utility for a rotary encoder in which the rod can be moved both rotationally and translationally. According to the invention, the device comprises means for presenting a hard point during the translational movement of the rod.

Abstract: The invention relates to the sealing of a keyboard. The invention is particularly, but not exclusively, applicable in a keyboard fitted on an aircraft instrument panel. The keyboard comprises at least one switch, a rigid key allowing an operator to operate the switch, a front face comprising an opening traversed by the rigid key, and sealing means preventing particles from penetrating between the rigid key and the opening. According to the invention, the sealing means comprise a flexible membrane traversed by the rigid key, attached to the key and to the front face.

Abstract: The invention relates to an operating device comprising a rod which is able to move translationally along an axis with respect to a housing, about an equilibrium position. The invention finds particular utility for a rotary encoder in which the rod can be moved both rotationally and translationally. According to the invention, the device comprises means for presenting a hard point during the translational movement of the rod.