NORWEGIAN State Railways has chosen electro-hydraulic Clamp Lock point machines from Smith Industries Hydraulics Co for installation at Drammen near Oslo. NSB’s design demands meant that the original design used in Britain was enhanced by protection against harsh climatic conditions and addition of multiple secondary drives and detection, built into Schwihag sleepers for protection.

The Clamp Lock power pack has a number of outputs, allowing it to operate multiple drive units. Additional ram positions can be sited along the switch blades, with power hoses laid in protective troughing parallel to the track. Enclosure of the drive rams within the sleepers not only allows automated tamping, but ensures reliable operation in snow, with more effective point heating.

Smith Industries Hydraulics Co

Witney, Great Britain

Reader Enquiry Number 136