Progress report on proper grinding of bonding drills; requisites for automatic block signaling circuits; new developments in methods of improving shunting of track circuits; improvements in sanding devices; voice pass filter, voice and type H pass filter, and voice and carrier pass filter for coded system control; selenium rectifiers; grounding of signal power supply transformers. (Signal Sec)
Committee IV -- Automatic block signaling
Assn Am Railroads -- Advance Reports
1948
46 pages
Report
Englisch
© Metadata Copyright Elsevier B. V. All rights reserved.
Committee IV -- Automatic block signaling
Engineering Index Backfile | 1941
Committee IV -- Automatic block signaling
Engineering Index Backfile | 1939
Committee IV -- Automatic block signaling
Engineering Index Backfile | 1936
Committee VIII -- A. C. automatic block signaling
Engineering Index Backfile | 1920
Committee IV -- Direct current automatic block signaling
Engineering Index Backfile | 1934