Wagon shunting device for automatic marshalling yard - provides warning signal prior to shunting and uses resistors to regulate drive motor

摘要

The device has an endless drive chain (4) driven via a motor (2) and carrying a pivoted coupling (6) mounted on a bogie, which can engage the running wheel of the railway wagon to be shunted. - The shunting control circuit has a source (8), coupled to a shunting warning device (9) and to the drive (7) for the motor (2), so that the warning device is actuated for a given interval before the motor (2) is energised. One or more resistors are connected in the stator circuit of the motor as soon as shunting starts to reduce the drive moment and disconnects the resistors during the initial alarm interval to allow the motor (2) to reach its nominal rotation.