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G.W.R. backing signals

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G.W.R. backing signals

Unread postby South Western John » Sun Apr 19, 2015 1:09 pm

Can anybody please advise how to apply the "two holes in an arm" type GWR backing signals. If a backing signal is presented before a train and then pulled 'off', does the train retreat backwards away from the signal, or does the signal appear behind the loco which then reverses past it?
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Re: G.W.R. backing signals

Unread postby Danny252 » Sun Apr 19, 2015 1:20 pm

The latter option.

One is illustrated on Bewdley North's diagram (signal 20/23) here: https://www.flickr.com/photos/beerdave1 ... 88/sizes/l

The line through Platform 1 is the Down Main, running from right to left. 20 permits a train in the platform to proceed wrong direction along on that line (i.e. left to right), and 23 permits it to proceed into the Down Yard.
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Re: G.W.R. backing signals

Unread postby John Webb » Sun Apr 19, 2015 7:40 pm

Another good example can be seen at Yarnton, junction for the Fairford branch, as documented in "The Heart of the Great Western" by Adrian Vaughan. There was a backing signal 45 on the link from the Up GWR line to the LMS line, which allowed trains to reverse back across the GWR running lines into the down sidings and the exchange sidings.

I'd be inclined to think of these backing signals as having the same effect of a ground shunt signal, but used where the sighting of such a ground signal was not possible due to curvature of the line, length of train or the like.
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Re: G.W.R. backing signals

Unread postby S&TEngineer » Sun Apr 19, 2015 8:24 pm

GWR Circular No.1354 of January 1902 gives the official explanation of Backing Signals and Circular No.1510 of July 1904 gives a change to the 'ON' colour.

A copy of these for download can be found on the SRS Website but access is restricted to SRS members only. I cannot quote them here.
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Re: G.W.R. backing signals

Unread postby B.P.Mills » Tue May 31, 2016 8:52 am

Prior to 1964, Cadoxton South Junction signal box on the Cardiff-Barry line, operated a 3-route backing signal with route indicator which was mounted on its 'island' platform. It was eventually replaced by a triple disc ground signal between up & down main lines and authorised backing movements from the down main to the Cadoxton North Up sidings, Up main (Pontypridd line) or up main through to Cadoxton North down sidings. (Photo available on request).
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