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Post by programmes1 on Apr 16, 2017 19:27:20 GMT
On the east at West Ken the shunt signal (WB31) that takes you into Lillie Bridge was changed to a fibre optic just wondering if anyone can point me in the right direction where there is a good photo or video showing it as this video at 3.34 you can't make it out very clear. TIA |
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Post by programmes1 on Apr 17, 2017 16:20:19 GMT
It's okay I found one on this site. WB31 |
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Deleted
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Post by Deleted on Apr 17, 2017 18:51:58 GMT
On the east at West Ken the shunt signal (WB31) that takes you into Lillie Bridge was changed to a fibre optic just wondering if anyone can point me in the right direction where there is a good photo or video showing it as this video at 3.34 you can't make it out very clear. TIA It's blank in the video. It only displays an aspect when cleared. |
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Post by MoreToJack on Apr 17, 2017 19:01:00 GMT
This is typical of most shunt signals of this variety on the Underground that are co-located with running signals. At Hammersmith we have almost identical ones on each platform (OZ25/26/27), as well as others providing access to and from the siding and depot (variously OZ17/18/24/28/29). Once the route is cleared the signal will be illuminated as shown in your picture, extinguishing after the passage of a train and being superseded by the red aspect on the running signal. Where no running signal is provided (in the case of Hammersmith, this includes OZ17/18/24) the shunt signal will display a horizontal red bar in white circle, meaning stop/danger.
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Post by Deleted on Apr 17, 2017 19:47:24 GMT
On the east at West Ken the shunt signal (WB31) that takes you into Lillie Bridge was changed to a fibre optic just wondering if anyone can point me in the right direction where there is a good photo or video showing it as this video at 3.34 you can't make it out very clear. TIA It's blank in the video. It only displays an aspect when cleared. Suppressed |
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Post by programmes1 on Apr 21, 2017 18:49:43 GMT
On the east at West Ken the shunt signal (WB31) that takes you into Lillie Bridge was changed to a fibre optic just wondering if anyone can point me in the right direction where there is a good photo or video showing it as this video at 3.34 you can't make it out very clear. TIA It's blank in the video. It only displays an aspect when cleared. Thanks I think this is the only fibre optic on the main as all the other ones I am aware of are in sidings or reception roads. |
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Post by programmes1 on Apr 21, 2017 18:51:28 GMT
This is typical of most shunt signals of this variety on the Underground that are co-located with running signals. At Hammersmith we have almost identical ones on each platform (OZ25/26/27), as well as others providing access to and from the siding and depot (variously OZ17/18/24/28/29). Once the route is cleared the signal will be illuminated as shown in your picture, extinguishing after the passage of a train and being superseded by the red aspect on the running signal. Where no running signal is provided (in the case of Hammersmith, this includes OZ17/18/24) the shunt signal will display a horizontal red bar in white circle, meaning stop/danger. Jack so there are fibre optic shunts on the main at Hammersmith as the last time I went through there they were normal ones. |
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Post by MoreToJack on Apr 21, 2017 19:12:44 GMT
This is typical of most shunt signals of this variety on the Underground that are co-located with running signals. At Hammersmith we have almost identical ones on each platform (OZ25/26/27), as well as others providing access to and from the siding and depot (variously OZ17/18/24/28/29). Once the route is cleared the signal will be illuminated as shown in your picture, extinguishing after the passage of a train and being superseded by the red aspect on the running signal. Where no running signal is provided (in the case of Hammersmith, this includes OZ17/18/24) the shunt signal will display a horizontal red bar in white circle, meaning stop/danger. Jack so there are fibre optic shunts on the main at Hammersmith as the last time I went through there they were normal ones. I confess I have to pass on that one - you could be right. My memory is hazy and I was looking at other things the last time I was up front. I see the same at my end of the lever whatever the head is! 😉 |
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rincew1nd
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Post by rincew1nd on Apr 21, 2017 19:27:10 GMT
What makes fibre signals 'abnormal'? Unconventional perhaps.
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Post by Deleted on Apr 21, 2017 19:28:49 GMT
What makes fibre signals 'abnormal'? Unconventional perhaps. They use car fog lamps  |
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Post by Deleted on Apr 22, 2017 1:07:32 GMT
It's blank in the video. It only displays an aspect when cleared. Thanks I think this is the only fibre optic on the main as all the other ones I am aware of are in sidings or reception roads. The inlet into Heathrow Terminal 5 sidings from the platform is fibre-optic. All of the Central's shunts on the main line are fibre-optic. There are fibre-optic shunts on the main at Whitechapel as well, or at least, EN7 certainly is. I'm sure that's not all =) |
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Post by Deleted on Apr 22, 2017 1:10:29 GMT
Jack so there are fibre optic shunts on the main at Hammersmith as the last time I went through there they were normal ones. I confess I have to pass on that one - you could be right. My memory is hazy and I was looking at other things the last time I was up front. I see the same at my end of the lever whatever the head is! 😉 Pretty sure 25, 26 & 27 are all fibre-optic. I guess this must be 27 and it certainly is  www.flickr.com/photos/tompagenet/12159454663/ |
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Post by bruce on Apr 22, 2017 8:26:50 GMT
Queens Park South Shed has fibre optic shunt signals
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Post by MoreToJack on Apr 22, 2017 10:36:35 GMT
I confess I have to pass on that one - you could be right. My memory is hazy and I was looking at other things the last time I was up front. I see the same at my end of the lever whatever the head is! 😉 Pretty sure 25, 26 & 27 are all fibre-optic. I guess this must be 27 and it certainly is www.flickr.com/photos/tompagenet/12159454663/24/25/26/27 definitely are - it's 28/29 ("on the main" that I'm not sure about. |
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Post by Deleted on Apr 22, 2017 11:48:10 GMT
24/25/26/27 definitely are - it's 28/29 ("on the main" that I'm not sure about. Those two are of the traditional type. |
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cso
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Post by cso on Apr 22, 2017 14:03:30 GMT
I'm slightly confused by this discussion on Fibre-Optic signalling... is it being implied that what's being seen is fibre-optics because it just looks like LEDs to me?
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Post by Deleted on Apr 22, 2017 14:33:31 GMT
Internally they are fibre optic lit by normal lamps
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Post by Deleted on Apr 22, 2017 16:47:07 GMT
24/25/26/27 definitely are - it's 28/29 ("on the main" that I'm not sure about. Ahhh fair enough, I always assumed that platform roads would count as the main line? |
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roythebus
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Post by roythebus on Apr 24, 2017 14:26:56 GMT
An amusing aside about the old disc type shunt signals, on the w/b at Parsons Green, 1970's. W/B train terminates, shunt clears, it goes into the siding. Next w/b arrives, gets green, goes on to Wimbledon. Next one appears, has to go into sidings. Points change, shunt signal does not. The lineman is called out, there is some delay. It was winter, there was a blackboard resting on the shunt signal with D ON written on it. Eventually the lineman checked the signal. First time the disc cleared, the blackboard was resting on the signal. when it went back to danger, blackboard got dislodged under on of the bolt heads, preventing the disc from moving from danger to clear! Maybe there's something to be said for fibre optic signals. We all had a laugh and went home, having booked a bit of overtime. |
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