Operation of different types of safety devices; electromechanical application of brake in case of overunning of stop signals; use of photoelectric cells for operation of block signals.
Railroad safety facilities -- Survey
Eisenbahn-Sicherungsanlagen -- Ein Rundblick
V.D.I. Zeitschrift ; 75 , n 24
1931
3 pages
8 Figs.
Article (Journal)
German
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