Prevention of completion of a lever stroke to the fully normal position until
the conditions required by 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 are satisfied. See also Check
Locking and Indication LockingA form of locking whereby the full travel of the lever is inhibited until the operation of the function (for example points) is complete and detection is obtain... More.