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Left to right: up loop; up main (where the first collision occurred); down main; down loop. The signal box was on the outside of the up loop. The disaster occurred at Quintinshill signal box, which was an intermediate box in a remote location, sited to control two passing loops, one on each side of the double-track main line of the Caledonian ...
On 17 December 1915, in the early morning in fog, a goods train ran out onto the main line past St Bedes signal box having been banked in the rear up the incline by a six-coupled tank engine. The banking engine, uncoupled, dropped away from the goods train and came to a stand on the up main line, but was not seen by the signalman.
Elsewhere someone has listed 9 deficiencies in the way the work was carried out at the signal box. A proper inspection would have found at least one - the lack of the use of the collar. See Quintinshill Conspiracy for theories as to why these inspections were carried out and why they failed to find one of the root causes of the accident.
Hebden Bridge signal box A number of signal boxes in England are on the Statutory List of Buildings of Special Architectural or Historic Interest. Signal boxes house the signalman and equipment that control the railway points and signals. Originally, railway signals were controlled from a hut on a platform at junctions. In the 1850s, a raised building with a glazed upper storey containing ...
Stirling North signal box A number of signal boxes in Scotland are on the Statutory List of Buildings of Special Architectural or Historic Interest. Signal boxes house the signalman and equipment that control the railway points and signals. Originally railway signals were controlled from a hut on a platform at junctions, but by the 1860s this had developed into a raised building with a glazed ...
The point machine (in this case an electric motor) and associated mechanism used to operate this switch can be seen to the right in the picture. A point machine (also known as a point motor, switch machine or switch motor) is a device for operating railway turnouts especially at a distance.
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