Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-6-1320-4370-2 |
Объём: | 244 страниц |
Масса: | 393 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 2 |
High Quality Content by WIKIPEDIA articles! The railway block code is a system of bell rings used in Great Britain to communicate between manually operated Signal Boxes (the system is not used in modern power signal boxes). Each signal box would have a bell circuit to the box on either side of it along the line. The equipment would consist of a plunger or key (rather like a Morse key) which if pressed, rings the bell in the neighbouring box. The neighbouring box would have a key for communicating back, therefore each box has a key which rings the bell in the other box. Where a signal box communicates with more than one other box (in either direction along the line, and possibly along a branch line too), each bell would have a different tone, so that the signalman could tell them apart by ear.
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