Routine electric tests of semaphore signal mechanisms, relays and switch machines at Aurora electric interlocking plant of Chicago, Burlington and Quincy serve to ferret out trouble before operating failures can occur; brief discussion of testing equipment.
Maintenance tests at Burlington interlocker
Ry. Signaling
Railway Signaling ; 22 , n 9
1929
2 pages
5 Figs.
Aufsatz (Zeitschrift)
Englisch
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