Good evening, it is not yet entirely clear to me whether those old electric block systems (Absolute block system, if I am not mistaken) with a wooden case were or were not influenced by the passage of trains for the purpose of occupying and freeing the section (block) towards to which and from which the train was respectively headed or from which the train came. Furthermore, it is not clear whether there is an electrical connection between the lever that controls the opening of the starting signal and the apparatus with wooden case. In other words, was it possible to pull the lever that activated the starting signal towards you without first having received electrical consent from the next station? Thank you very much for your availability and collaboration
A different answer from different places and at different periods, but from later and renewed absolute block installations, yes it is electrically controlled that you cannot clear the section signal without having received a positive acceptance from the next signal box. This is called Line Clear Release (LCR).
I remember it well, I attended there in 1965 to take on my first Signal Box.......Crystal Palace "C" Box towards Forest Hill.
Fantastic training aids! I would have love to have been trained this way!
Quite a period piece! Apart from the infrastructure changes, the lineside from Clapham junction has changed pretty dramatically since this was made.
Absolute block signalling we called it which gave way to Track circuit block later on.
Semaphore for ship yard engines too I reckon.
Good evening, it is not yet entirely clear to me whether those old electric block systems (Absolute block system, if I am not mistaken) with a wooden case were or were not influenced by the passage of trains for the purpose of occupying and freeing the section (block) towards to which and from which the train was respectively headed or from which the train came. Furthermore, it is not clear whether there is an electrical connection between the lever that controls the opening of the starting signal and the apparatus with wooden case. In other words, was it possible to pull the lever that activated the starting signal towards you without first having received electrical consent from the next station? Thank you very much for your availability and collaboration
A different answer from different places and at different periods, but from later and renewed absolute block installations, yes it is electrically controlled that you cannot clear the section signal without having received a positive acceptance from the next signal box. This is called Line Clear Release (LCR).