Gif of LNWR Emblem
London & North Western Railway Society
Glossary for the LNWR Society

Glossary Results for Word "Block Instrument"

Block Instrument An electrically operated indicating device used in a signal boxExplain 'Signal Box'. The instrument is connected with a similar device in an adjacent signal box, and can be set to indicate whether or not the block sectionExplain 'Block Section' between the two signal boxes is occupied by a train.