block instrument

English

Noun

block instrument (plural block instruments)

  1. (rail transport, UK) An instrument installed in a cabinet, used in block signalling installations.
    • 1960 March, “Talking of Trains: Collision at Slade Green”, in Trains Illustrated, page 133:
      The line is signalled with upper quadrant semaphores and Sykes lock and block three-wire two-position block instruments. [...] The Inspecting Officer concludes that both signalmen must share responsibility for the accident by the irregular release of the block instrument, but remarks that the two-position Sykes instruments, although ample for maintaining safety under normal working, do not show clearly the state of the block section ahead.
This article is issued from Wiktionary. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.