Description of interlocking installed at Saginaw, Mich, as part of project including construction of new bascule type lift bridge to replace old swing type drawbridge over Saginaw river; panel type control machine, searchlight signals, electric switch machines, and plug-in type relays, included in new plant.
All-relay drawbridge interlocking installed on pere Marquette
Ry Signaling
Railway Signaling ; 39 , n 4
1946
4 pages
Article (Journal)
English
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