Bearings for supporting a pivoting gun in a wall, e.g. a turret wall

Full Title

Gun mountings permitting traversing or elevating movement, e.g. gun carriages > Mechanical systems (F41A27/02, F41A27/04, F41A27/30 take precedence) > Bearings, e.g. trunnions; Brakes or blocking arrangements > Bearings for supporting a pivoting gun in a wall, e.g. a turret wall