Abstract: A mechanical optoelectric angle comparator for determining the angular position relative to the line of sight of a weapon mounted on a combat vehicle having a sighting device including an objective mirror which pivots on a first axis that is parallel to the axis of rotation of the weapon, is provided with a mechanism for mechanically transmitting the angular position of the weapon.
Abstract: A truck for a high speed rail vehicle which has a friction bearing between the car body and the truck frame so as to restrain movement of the frame about its vertical axis until the friction between the friction bearing and the truck frame has been overcome. The truck also has axle bearings in the form of mutually inclined surfaces made of material of high stiffness in the normal direction of travel of the truck.