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Tubular Steel Type Signal Assembly
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Tubular Steel Type Signal Assembly, result 1 of 1

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Tubular Steel Type Signal Assembly
Signal gantry ex Northolt Junction.
Work Type
Signalling & Telecommunications
Great Western Railway Tubular Steel Type Signal Assembly from High Wycombe, West Ruislip, Gerrards Cross & West Ealing Stores; This gantry represents the signals placed at Northolt Junction (near South Ruislip station) which opened in 1908 on the Great Western Railway. The signals controlled the approaches to the junction where the line for London Paddington divided from the line to London Marylebone.; The red signals show stop when horizontal and go when down (lower quadrant). The yellow distant signals provide a driver with a warning of what the next signal is showing, allowing him to slow down if necessary. Signal backs are painted white with a black band.; The gantry s walkway and ladders provided access for maintenance and to top up the oil lamps which illuminated the signal lenses. Oil lamps burn with a yellow flame and blue lenses were used for the signals, because of the fact that yellow mixed with blue makes green.; These Great Western Railway lower quadrant pattern signals which move down to show green/go work in the opposite way to most mechanical railway signals, which are upper quadrant and move up to show green/go.
National Railway Museum, Great Hall
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Image and original data from Science Museum Group -
The source metadata displayed in the Description field is released under a Creative Commons Attribution 4.0 license - All other source metadata is released under Creative Commons Zero - The image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License -
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