All-relay interlocking facilities, including three interlocking layouts controlled from one machine, installed just east of Columbus, Ohio; construction of interlocking layouts was made necessary because of numerous changes and additions in yards, as well as connections between yards and main tracks; detailed description of interlocking facilities.
Extensive all-relay interlocking features plug-in relays
Ry Signaling
Railway Signaling ; 38 , n 12
1945
8 pages
Aufsatz (Zeitschrift)
Englisch
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