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1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

British signalling of the past (UK, excepting Northern Ireland)

Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby Richard Pike » Fri Oct 30, 2009 11:43 pm

i can account for the 29 machines to point ends. I wasn't sure if some trailing ends were driven from the facing end machine. Is it worth me scanning the booklet and putting it on my site?
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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby Pete2320 » Sat Oct 31, 2009 9:50 am

Richard Pike wrote:i can account for the 29 machines to point ends. I wasn't sure if some trailing ends were driven from the facing end machine. Is it worth me scanning the booklet and putting it on my site?

Yes, I would be very interested in seeing that.
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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby Richard Pike » Sat Oct 31, 2009 1:27 pm

I've scanned the booklet but it comes out at 29mb. I don't really want to upload that lot to my site so if anyone fancies a copy PM me with an email address and i'll send a copy over..
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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby S&TEngineer » Tue Jan 5, 2010 3:22 pm

Here is an interesting British Pathe film of the new Potters Bar SB:

http://www.britishpathe.com/record.php?id=65813

Its about half way in :lol:
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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby StevieG » Thu Jan 7, 2010 1:17 am

Chris Bellett wrote:Here is an interesting British Pathe film of the new Potters Bar SB:

http://www.britishpathe.com/record.php?id=65813

Its about half way in :lol:
Well found Chris.

Through that, also thought I recognised the still scene of one of the other 'related' items along the bottom of that webpage. - I was right :
http://www.britishpathe.com/record.php?id=510
(16 minutes of out-takes; certainly not all railway though. Haven't watched it right through yet, but the opening colour scenes are good for GN/LNER 'spot the location' fans.)
BZOH

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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby John Hinson » Fri Feb 26, 2010 10:39 am

A view of Potters Bar panel:
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Photo: Collection of John Hinson

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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby StevieG » Fri Feb 26, 2010 1:39 pm

V. nice, Sir; thanks.

Seen before, but this is a good sharp copy.
BZOH

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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby Frank » Fri Feb 26, 2010 4:49 pm

Hello,

nice Picture......thanks for that........

what a contrast.....modern Panel and old Handsets........ :)
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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby John Hinson » Fri Feb 26, 2010 7:37 pm

Hi-res photograph of diagram, showing the moving point indications on the panel, now uploaded to http://www.signalbox.org/diagrams.php?id=451 .

Note for StevieG, Richard Pike and others of us that get into minutests detail - I was surprised to see it worked TCB to Greenwood over the double line - I alsways assumed the box opened concurrently with the four tracking.

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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby StevieG » Sat Feb 27, 2010 12:15 am

Excellent John! Many thanks.

Presumably, as photographed from slightly above and with no lamps illuminated, a supplier's photo.
Interesting that 1959 is quoted though: This is the '1955' diagram, I would say.
But the quadrupling through to Greenwood was completed in '59 : Perhaps this photo was taken after this panel was taken out of use; supplanted by the 'through 4-tracked' version.

I've never seen this early version of the diagram in such detail.
The "interlaced sand drag" in the Down Fast was not known to me.
Interesting that the 'Permissive Freight' working of the Up Slow from Marshmoor's 'Hawkshead' signals was still catered for at that time ["MA" below M4, = calling-on facility (Marshmoor's Lever 'A' : I thought I'd seen that this signal was actually a 'Call-On' banner(?) ].
BZOH

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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby John Hinson » Sat Feb 27, 2010 4:02 am

Put no faith in the date - I just put that in from memory because I was a bit rushed. So are you saying the box controlled the double track layout for four years? I hadn't realised that, but of course it wouldn't be evident from Greenwood's diagram which Potters Bar box it worked to.

Yes it is an official photograph no doubt taken at the time of opening - it is backstamped Metropolitan Vickers and as you no doubt noticed (?) I did credit it as such.

The interior photograph may be from the same source but it is not marked.

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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby StevieG » Sun Feb 28, 2010 1:32 am

Sorry, failed to read the photo credit properly.

Well, I think the four years must be approximately right, as I understand that the station rebuilding and four-tracking was completed sometime in 1955, and the quadrupling fully opened through the three tunnels in 1959 (in May I think), though I believe Greenwod was abolished a little earlier (not least because it physically had to go for the laying of some of the new track).
BZOH

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Re: 1940/50/60s UK Power Boxes with 'GRS' 'NX' Panels

Unread postby StevieG » Sun Aug 27, 2017 2:25 pm

Principally for Richard Pike's possible benefit, while just reviewing this thread, I realise that I did not answer one minor question of RP's : -

Herein, on 30th October 2009 He and me wrote :-
StevieG wrote:
Richard Pike wrote:I've now finally located the official book of words on the Potters Bar resignalling.

Quote..
There are twelve crossovers including two double slip and one single slip, one triple ended and two single ended layouts comprising twenty-nine point machines in all.

I can't see two double slips anywhere so are they referring to two ends of the same slip?

I can't reconcile some of those figures either.
The only track layouts I know of are as shown on your original facia plate, plus the quadrupling-completion one that was the same except for the doing away with the superfluous 2-ended 54s and triple-ended 55s, plus, at some time, the south FLs trailing xover 51 disappeared, and a GF-operated FLs facing xover alongside signal PB6 arrived instead.
What I could also have mentioned was that I'm certain there were not two double slips : But there was certainly one (in the Reversing Siding); and I assume that the 'second' was an erroneous reference to the single slip in the Down Fast, not far north from (left of) the box.
BZOH

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