Bonding of oil sidings -- steam railroad territory; automatic block signal system; possibility of improper signal operation resulting from use of rail fissure detector cars and recommended protective measures; requisites for minimizing effect of lightning on track circuits; protection against lightning; tractive armature d-c polarized relay; electric motor semaphore signal; time element relay. (Signal Sec)
Committee IV -- Automatic block signaling
Assn Am Railroads -- Advance Reports
Association of American Railroads -- Meeting ; 1941 Automatic block
1941
39 pages
Aufsatz (Konferenz)
Englisch
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