Symbols are limited to apparatus usually encountered in electrical engineering and construction of all classes of electric traction, such as electrical equipment of electrically operated cars and locomotives, etc. (see also Mech Eng v 54 n 7 July 1932 p 515)
Report on standards for graphical symbols used for electric traction including railway signaling
Am Inst Elec Engrs -- Report
1931
20 pages
Report
Englisch
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Report on standards for graphical symbols used for electric traction including railway signaling
Engineering Index Backfile | 1932
Report on standards for graphical symbols used for electric traction including railway signalling
Engineering Index Backfile | 1931
Traction symbols including railway signaling
IEEE | 1930
Railway signaling symbols: Wiring symbols and written circuits
Engineering Index Backfile | 1954
Engineering Index Backfile | 1923
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