Description of all-relay interlocking including route control by levers installed at Coon Creek, Minn, to replace mechanical interlocking destroyed by fire; switches are positioned and signal cleared for route by one operation of lever.
New interlocking on Great Northern
Ry Signaling
Railway Signaling ; 36 , n 6
1943
Aufsatz (Zeitschrift)
Englisch
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New interlocking on Great Northern
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