Replace original d.c. track circuit signal apparatus of London subways with a.c. equipment of condenser-fed type. (see also Traction Shop and Roadway, vol. 4, no. 11, Nov. 1931, pp. 331-333, 4 figs.; and Elec. Ry. Jl., vol. 75, no. 13, Dec. 1931, pp. 695-696, 3 figs)
Modernize London subway signal system
Elec. Traction
Electric Traction ; 27 , n 11
1931
2 pages
2 Figs.
Article (Journal)
English
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Modernize London subway signal system
Engineering Index Backfile | 1931
|Modernize London subway signal system
Engineering Index Backfile | 1931
|Engineering Index Backfile | 1946
|Tema Archive | 1984
Engineering Index Backfile | 1929