Plant at crossings of three single track lines, at Hampton, Iowa, includes automatic graphic recorders, time element shunt retaining feature, and signal repeater indications in time release box.
Automatic interlocking on rock island
Ry Signaling
Railway Signaling ; 30 , n 2
1937
3 pages
Article (Journal)
English
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Engineering Index Backfile | 1938
|Electric switch heaters at Rock Island interlocking
Engineering Index Backfile | 1938
|Electric switch heaters at rock island interlocking
Engineering Index Backfile | 1938
|