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 a helmet with retractable visors for fast day/night reconfiguration.

Abstract: A simplified-fitting modular helmet resistant to aerodynamic stresses. The helmet has a base helmet and module, and includes between these two parts two lateral linking devices and an upper linking device. The linking devices include a finger secured to the module inserted into a socket secured to the base helmet and latchable in the assembled position of the helmet by a device of the quarter of a revolution type. The lateral fingers permit a small lateral clearance between the two parts of the helmet. Such a helmet may find particular application as an aircraft pilot helmet.

Abstract: The disclosed method provides for the precise positioning of the night vision device with respect to the helmet to which it has to be fixed, in order that the user may enjoy optimum viewing conditions. This method consists in determining the position of the support of the device with respect to significant points of the user's head, in contact with the helmet, and then in copying these relative positions on a supporting tool bearing the helmet and the support of the night vision device, and in forming thickness shims between the helmet and the support.