Difference between revisions of "Talk:List of signal boxes"

Revision as of 21:06, 13 December 2015

I got the diagrams from the SVRSevern Valley Railway S&TSignals & Telegraph web site and added them to each page while the wiki was still being tested in private.
It went public and I never got around to asking permission.
There's no credit or copyright notice on the images and no contact on the web site.
Who do I ask?
--Graham Phillips 110 (talk) 09:03, 16 January 2015 (UTC)

That's a bit awkward! I'll ask around and see if I can work out who runs it - I have a couple of names in mind that might be linked to it.

--Danny252 (talk) 10:58, 16 January 2015 (UTC)

Regarding the supposed groundframes for working the far end loop points at Coalport, Cressage, and Berrington until 1930, the situation doesn't seem to match Marshall's information...

Firstly, the Signalling Record Society diagram for Coalport shows the existence of the motor points at a later date, and given the distance to the signal box, I can believe that they were too far for manual control.

However, I can't find any evidence for a similar situation at Cressage and Berrington. A 1913 sketch of Cressage shows the points at either end of the loop being directly controlled from the signal box in standard fashion. The similar 1913 sketch of Berrington doesn't show lever numbers, but equally there's no sign of a ground frame or any other unusual feature.

On the other hand, I can't get the distances in question to match the supposed maximum distances for operating points. Using OSOrdnance Survey maps, I get the distance from the signal box to the far end points as 350 yards, which was only permitted for manual operation after 1925. For Berrington it's about 250 yards, which you can do from 1908, so possibly in the 1913 diagram but not the original date of the box.

An odd situation! --Danny252 (talk) 18:25, 13 December 2015 (UTC)

Looking in slightly more detail, I now question how accurate the 1913 date given for those sketches is - for example, the "1913" sketch for Buildwas appears to be the post-1923 layout... --Danny252 (talk) 18:40, 13 December 2015 (UTC)

Odd as you say. I believe Coalport was the longest of the three loops in question. MA Vanns also mentions the GFs at Berrington and Cressage, although he cites the Marshall book among his references. Marshall's reference for the installation of those two is to a document in the Shropshire County Records Office, which at least looks like original research. He also says that all 3 had GFs because ...the distance of the points from the signal box was regarded as too great for a run of rodding. Whether 'regarded as' means a practical decision or a legal requirement at the time, I can't say.

One other clue, the Mitchell and Smith book includes an old OSOrdnance Survey map of Cressage with S.B. (signal box) at the north end of the loop as well as the one by the road crossing. There are other provable instances of S.B indicating ground frames, such as the map of Kinlet & Billingsley which definitely had two GFs but only one box.--Robin (talk) 21:06, 13 December 2015 (UTC)