Device for operating switches

An arrangement for operating a rail switch having a mechanical switching device, said arrangement including a plurality of interlinked hydraulic switching devices separated in the longitudinal direction of the rails and each comprising a hydraulic cylinder/piston unit, at least one of said hydraulic switching devices being directly connected with the mechanical switching device, said units each having cylindrical volumes defined by the cylinder and the piston of the respective unit, said volumes of respective units being hydraulically interconnected whereby when a piston of one of said units is displaced relative to its cylinder in response to displacement of the mechanical switching device, thereby pumping fluid from one of the unit's cylindrical volumes in accordance with the piston's displacement, the pistons of the remaining units are displaced in the same direction.