Paper deals with several systems of automatic block signaling, particularly a.c. system, and apparatus commonly used to insure continuity of power supply; within past three years number of frequency-converting automatic substations has been installed by railway companies; class of apparatus used in these stations is discussed, including details of installations on Pennsylvania and Long Island Railroads.
Power supply for railway signals and automatic train control
Am. Inst. Elec. Engrs. -- Jl
1928
4 pages
1 Fig.
Article (Journal)
English
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