A series of positions provided on a lever of a mechanicalOperated without any form of power assistance. More or power frameA Lever Frame controlling power operated equipment. See also Miniature Lever Frame. More for
operating pointsItems of permanent way which may be aligned to one of two positions, Normal or Reverse, according to the direction of train movement required. More. When operated, the lever can be lockedThe state of any Signalling Function or item of equipment when it is conditionally or unconditionally prevented from changing state or position by other parts o... More in the Normal, B
(normal checklock), D (reverse checklock), Reverse positions respectively.
(Other nominated positions are A, C and E.)