With the advent of AFO track circuits many problems have been presented but little research has bene done. General Railway Signal Co. will start an extensive project to compile the information needed. At a meeting in New York Gen. Rly. Sign. Co. gave some information concerning the characteristics of various track conditions and how the levels of audio frequency are affected. This article is the paper presented there.
Wanted: New standards for AFO
Gesucht: Neue Normen fuer Tonfrequenzgleisstromkreise
Railway System Controls ; 5 , 4 ; 25-32
1974
8 Seiten, 12 Bilder
Article (Journal)
English
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