Notes on highway crossing signal; automatic stop; speed control; train operation by signal indication; despatcher's remote control; centalized traffic control; approach lighting; automatic interlockings; car retarders; etc; list of devices used by Pennsylvania Railroad before any other railroad in America. (See also - discussion p 16-19)
Modern railway signaling
Ry Club Pittsburgh -- Off Proc
1932
12 pages
Aufsatz (Zeitschrift)
Englisch
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SLUB | 1910
Engineering Index Backfile | 1951
|Engineering Index Backfile | 1899
|Engineering Index Backfile | 1909
|Engineering Index Backfile | 1929