A pictorial representation of the interlockingA general term applied to the setting and releasing of Signals and Points to prevent unsafe conditions arising; also the equipment which performs this function.... More elements required to make-up
Mechanical LockingA method of interlocking where the components are movable metal pieces which physically lock and prevent the movement of one lever against another. More. An alternative term for Locking ChartA drawing showing in graphical form, the layout of Mechanical Locking for a Lever Frame. More.