Electrical equipment used in signal tower on the Midland. Use of track circuits, signal repeaters and lamp indicators. Position of arm shown while pyrometer indicates if lamp is lighted. (See also - no. 5 May 1919 pp. 159-161, no. 6 June pp. 188-191)
Block signaling practice on a British railway
Ry. Signal Engr
Railway Signal Engineer ; 12 , n 8
1919
4 pages
7 Figs.
Article (Journal)
English
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