The working of railway signals and points by electro-magnets, and controlling them, in conjunction with a complete block system, efficiently and economically by a current from a primary or secondary battery
Author :
Timmis, Illius A.
Volume :
14
Issue :
55
fYear :
1885
fDate :
2/27/1905 12:00:00 AM
Firstpage :
56
fLanguage :
English
Journal_Title :
Telegraph-Engineers and Electricians, Journal of the Society of
