Modern system is founded on automatic fail-safe interlocked circuits in field, with conventional communications circuits superimposed, and extending from field to control office, for remotely controlling movement of trains on railway; safe operation assured by automatic character of resulting system.
Railway signaling
Elec Eng
Electrical Engineering ; 74 , n 9 ; p 760-765
1955
6 pages
Aufsatz (Zeitschrift)
Englisch
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