56-lever General Railway Signal Co all-electric interlocking machine, located entirely under snowsheds at Norden, Calif, which has 53 working levers to control 8 switches, 5 cross-overs, 4 derails and 62 interlocked signals; watchman and fire-alarm system; either-direction signaling on double track.
Electric interlocking in snow sheds on southern Pacific
Ry Signaling
Railway Signaling ; 28 , n 5
1935
5 pages
Article (Journal)
English
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