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Worcester Mechanical Boxes

Current and future British signalling (UK except Northern Ireland)

Re: Worcester Mechanical Boxes

Unread postby Tulyar15 » Sat Aug 1, 2015 6:34 pm

Adrian the Rock wrote:


(There is also, IMHO, a fair case for allowing TJ6/SH2 to show a green aspect, if SH has pulled off right through, eg for a non-stopping freight train! The only risk I can see in that situation is of a driver forgetting what the speed limit through SH is.)


..and of course, Cross Country Diversions.
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Re: Worcester Mechanical Boxes

Unread postby Fast Line Floyd » Mon Aug 3, 2015 7:46 am

I agree with you both but approach control is a requirement of any colourlight signal which reads towards a semaphore signal at danger.
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Re: Worcester Mechanical Boxes

Unread postby Mike Hodgson » Mon Aug 3, 2015 9:00 am

Fast Line Floyd wrote:I agree with you both but approach control is a requirement of any colourlight signal which reads towards a semaphore signal at danger.


Has this always been a requirement for colour lights, or were there historically some without, and if so, could there still be some out there with grandfather rights?
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Re: Worcester Mechanical Boxes

Unread postby Fast Line Floyd » Mon Aug 3, 2015 9:31 am

Mike Hodgson wrote:
Fast Line Floyd wrote:I agree with you both but approach control is a requirement of any colourlight signal which reads towards a semaphore signal at danger.


Has this always been a requirement for colour lights, or were there historically some without, and if so, could there still be some out there with grandfather rights?

I chased up some information partly on this vain officially whilst I worked for RSSB and the answer is definately yes they did exist and we could find none remaining now.
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Re: Worcester Mechanical Boxes

Unread postby John Hinson » Mon Aug 3, 2015 9:46 am

This sounds particularly extreme and I wonder if the statement should be qualified by more words.

I would be very surprised if an example couldn't be found. For instance, on the Settle & Carlisle there is the newish all colour-light box controlling McGhies Sidings, and several new IB signals along the route. Surely many of these lead to semaphore home signals?

It would be ridiculous to apply approach control in such circumstances.

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Re: Worcester Mechanical Boxes

Unread postby Fast Line Floyd » Mon Aug 3, 2015 9:51 am

John Hinson wrote:This sounds particularly extreme and I wonder if the statement should be qualified by "worked from the same signal box".

I would be surprised if an example couldn't be found of a box with a colour-light starter where the next box with a semaphore home was many miles away, with its distant in between, of course. It would be ridiculous to apply approach control in such circumstances.

John

Yes indeed it should be qualified as 'worked from the same box'.
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Re: Worcester Mechanical Boxes

Unread postby John Hinson » Mon Aug 3, 2015 9:53 am

Thanks, Graham - you were replying while I was still editing my post!

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Re: Worcester Mechanical Boxes

Unread postby Mike Hodgson » Mon Aug 3, 2015 7:44 pm

Thanks for that Graham. I thought there probably would have been. I suppose we now watch this space to see who comes up with the exception that got overlooked somehow!

Where a colour light leads to a semaphore home worked by another box, I assume either the colour light section signal would be able to show a single yellow at full braking distance or there would be an intervening semaphore distant for the home which would have a full 1/4 mile overlap in lieu of the need for approach control.
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Re: Worcester Mechanical Boxes

Unread postby Pete2320 » Mon Aug 3, 2015 10:29 pm

Mike Hodgson wrote:Thanks for that Graham. I thought there probably would have been. I suppose we now watch this space to see who comes up with the exception that got overlooked somehow!

Where a colour light leads to a semaphore home worked by another box, I assume either the colour light section signal would be able to show a single yellow at full braking distance or there would be an intervening semaphore distant for the home which would have a full 1/4 mile overlap in lieu of the need for approach control.

Not usually. It would be up to the signalman at the box in advance to refuse the train if the approriate overlap was not available.

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Re: Worcester Mechanical Boxes

Unread postby Stuart Johnson » Mon Aug 10, 2015 5:43 pm

Discussion of how things are done at Truro has been split off to a new thread.
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Re: Worcester Mechanical Boxes

Unread postby Mike Stone » Wed Feb 17, 2016 8:48 pm

While investigating the banbury blockade I came across a job 6 to 11 August at Worcester for Tunnel Jct. locking frame renewal .

amongst other bits it says " 25 AND
26 POINTS CLIPPED TO/FROM FOREGATE
STREET.

32A, 32B, 36A, 36B, 38A, 57A, AND 57B POINTS ALL
CLIPPED BUT CANNOT BE USED ANYWAY. 38B
POINTS CLIPPED NORMAL FOR DEPOT MOVES.
25 POINTS LEFT OPERATIONAL.
;
no mention of any signalling alteration. I'm not clear what the comment re cannot be used anyway means - are they some o/o/u already, or just not accessible with 25/26 clipped?
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Re: Worcester Mechanical Boxes

Unread postby Fosse Road » Sat Feb 20, 2016 7:37 pm

"Locking Frame Renewal" It's a VT 5-Bar isn't it? What do they intend renewing it with? Or is it really just a refurbishment?
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Re: Worcester Mechanical Boxes

Unread postby Tulyar15 » Mon Feb 29, 2016 9:56 am

An industry source tells me it is a simple like for like renewal.
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Re: Worcester Mechanical Boxes

Unread postby JRB » Mon Feb 29, 2016 2:53 pm

Simple? Nowadays? Just send an order to Reading Works? Hmm.
Last edited by JRB on Mon Feb 29, 2016 10:35 pm, edited 1 time in total.
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Re: Worcester Mechanical Boxes

Unread postby Romsey » Mon Feb 29, 2016 9:31 pm

Mike Stone wrote:While investigating the banbury blockade I came across a job 6 to 11 August at Worcester for Tunnel Jct. locking frame renewal .

amongst other bits it says " 25 AND
26 POINTS CLIPPED TO/FROM FOREGATE
STREET.

32A, 32B, 36A, 36B, 38A, 57A, AND 57B POINTS ALL
CLIPPED BUT CANNOT BE USED ANYWAY. 38B
POINTS CLIPPED NORMAL FOR DEPOT MOVES.
25 POINTS LEFT OPERATIONAL.
;
no mention of any signalling alteration. I'm not clear what the comment re cannot be used anyway means - are they some o/o/u already, or just not accessible with 25/26 clipped?


That sounds very much like a mechanical locking overhaul. They should be done every 5 years but it can be extended with approval of the Route Asset Manager - Signalling depending on the results of previous annual checks.

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