Great Southern & Western Railway

by John Hinson

Inchicore signal cabin
Photograph from the collection of Dr. J W F Scrimgeour

Inchicore is both an amazing and unique structure. The flamboyant architecture is probably a result of a desire to build a show piece, given that Inchicore is the location of the Great Southern & Western Railway's locomotive works. The box is the first block post outside Kingsbridge station in Dublin.

Inside Inchicore box
Photograph by Dr. J W F Scrimgeour 5/71

The 26-lever frame was manufactured by the Railway Signal Company in Liverpool. On the instrument shelf are a pair of Harper's One-Wire Two-Position blocks and a Zerograph Train Describer which is used to signal trains on the "Third Line" between here and Kingsbridge. The method of operation of this instrument is detailed on the Kingsbridge page.

The Harpers instruments gave way to track-circuit block signalling on 10th March, 1991. The one working to Clondalkin was removed when CTC was introduced in the mid 1970's, but that to Heuston continued in use, probably well into the 1980's. Even then, though, the Zerograph instruments survived although they were probably rarely used.

Harper's instruments returned for a brief period in 2002 while track circuits and signalling were modified between Inchicore and Hazelhatch as part of the Heuston resignalling project. The box closed, as part of that scheme, on 17th March 2002, and the Zerograph instuments are now history.

Compiled from notes by Dr. J W F Scrimgeour, Tony Gray and Simon Lowe

About the photographs

Comments about this article should be addressed to John Hinson