|
|
| Re: Fourth Rails and Safety (832978) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: Fourth Rails and Safety |
|
|
Posted by Fytton on Sun Sep 13 12:27:46 2009, in response to Re: Fourth Rails and Safety, posted by Subterranean Railway on Sat Sep 12 02:53:42 2009. 'IINM, the fourth rail was implemented in the 1890s'The only deep tube line opened before 1900 was the City and South London Railway (now part of the Northern Line). The Central London Railway (now Central Line) opened in 1900. Neither of these became part of the Yerkes (London Electric Railways. or 'UndergrounD') empire until later, after Yerkes' death. Neither of these two early tubes used fourth-rail return: both had overrunning conductor rails between the running rails, with return through the running rails. This contrasts with the system still used on the former Southern Railway suburban lines, which have overruning third rails outside the running rails, the present Underground system with a central fourth rail for return, and the DLR system which has underrunning conductor rails! |
|
|
|