Anti-drift block for immobilizing train whilst stopped, comprises metal body, piece of indestructible material in the form of triangular corner inserted in the body and metal tongue

摘要

Anti-drift block for immobilizing a train whilst stopped and ejected in the event of a problem if the train starts moving comprises: (1) a metal body; (2) a piece of indestructible material in the form of a triangular corner inserted in the body; and (3) a metal tongue. The coefficient of adhesion of the material with respect to the track is 0.15-0.4, resulting in a gradual lamination of the metal tongue.