Device conveying simultaneously acoustic and optical signals from conductor to driver seat is described; in case of trains, starting signals are transmitted independently and stop signals for all cars can be given from only one place.
Electric signal equipment for street cars and motor buses
Elektrische Signalanlage fuer Strassenbahnwagen und Autobusse
Verkehrs Technik ; n 3
1929
2 pages
1 Fig.
Article (Journal)
German
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