Replace original d.c. track circuit signal apparatus of London subways with a.c. equipment of condenser-fed type. (See also Elec. Traction vol. 27, no. 11, Nov. 1931 pp. 543-544, 2 figs; Traction Shop and Roadway, vol. 4, no. 11, Nov. 1931, pp. 331-333, 4 figs.)
Modernize London subway signal system
Elec. Ry. Jl
Electric Railway Journal ; 75 , n 13
1931
2 pages
3 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