Tom
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Signalfel?
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Post by Tom on Nov 8, 2005 9:43:39 GMT
Is this due to the cabinet and track linkages with Network Rail? No just because it's really old. |
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Colin
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My preserved fire engine!
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Post by Colin on Nov 8, 2005 20:05:23 GMT
How much is a mars bar these days? *blink* IDGI. Just me being sarcastic ;D ;D ;D ;D |
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Deleted
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Post by Deleted on Nov 13, 2005 17:17:23 GMT
BUMP.
I noticed today that RJB1/3 has got an auxiliary aspect too - but why? And what colour is it?
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Tom
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Signalfel?
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Post by Tom on Nov 13, 2005 18:24:41 GMT
Why? Because main line trains use the signal - the very reason Aux aspects were provided.
I think it could be an aux yellow on repeaters, but don't quote me on it.
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Post by Harsig on Nov 13, 2005 18:35:49 GMT
All repeaters (except Fog Repeaters and Platform Repeaters) on the main lines between Harrow and Amersham were equipped with yellow auxiliary aspects. Of course because the signalling on this stretch is Multi-Aspect the only repeaters that actually exist are RJB1/3 & RJW1.
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Deleted
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Post by Deleted on Nov 13, 2005 19:12:07 GMT
Why? Because main line trains use the signal - the very reason Aux aspects were provided. True - it just seemed unexpected, that's all. All repeaters (except Fog Repeaters and Platform Repeaters) on the main lines between Harrow and Amersham were equipped with yellow auxiliary aspects. I presume that a similar arrangement is used then, with the RECR substituted by the HECR of the bottom yellow aspect? Of course because the signalling on this stretch is Multi-Aspect the only repeaters that actually exist are RJB1/3 & RJW1. And even then, they follow the same sequence too. A quick check of Stanley Hall's book implies the following: RJB1.3: single yellow JB1: red RJB1.3: double yellow JB1: single yellow JB3: red RJB1.3: green JB1: double yellow JB3: yellow Since the signal is in an MAS area, if the aux yellow was lit by the failure of the repeater, would the driver be expected to treat it as an MAS caution and expect to stop at JB1? |
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Post by Harsig on Nov 14, 2005 11:16:12 GMT
Since the signal is in an MAS area, if the aux yellow was lit by the failure of the repeater, would the driver be expected to treat it as an MAS caution and expect to stop at JB1? Of course, since that is what a yellow aspect, no matter how displayed, means in MAS areas. |
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Deleted
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Post by Deleted on Nov 14, 2005 17:44:41 GMT
Since the signal is in an MAS area, if the aux yellow was lit by the failure of the repeater, would the driver be expected to treat it as an MAS caution and expect to stop at JB1? Of course, since that is what a yellow aspect, no matter how displayed, means in MAS areas. Thanks. Just making sure all my signals are in a row  Is it true that the aux aspects have a separate power supply, and that the failure of this supply was the primary impetus for decommisioning them? |
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Tom
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Signalfel?
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Post by Tom on Nov 14, 2005 17:49:52 GMT
Is it true that the aux aspects have a separate power supply, and that the failure of this supply was the primary impetus for decommisioning them? More likely the lack of spares for them. They were 6v flag cells mostly, which were needed more urgently for other functions including programme machines. |
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Deleted
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Post by Deleted on Nov 14, 2005 17:52:05 GMT
Is it true that the aux aspects have a separate power supply, and that the failure of this supply was the primary impetus for decommisioning them? More likely the lack of spares for them. They were 6v flag cells mostly, which were needed more urgently for other functions including programme machines. Why does this remind me of the stories regarding the 12v car batteries getting stolen from tube stock for running buses? ;D ;D ;D |
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Post by zcap on Apr 30, 2021 8:58:25 GMT
Hey all, been a while. Hope youre all doing well.
Had to take a Met up to Croxley today and I noticed that on the Fast lines, some of the signal heads had what appeared to be a smaller, well shrouded, fifth aspect below the main signal head. I remember that the Watford DC lines had calling on aspects and these sort of reminded me of those.
I guess my question is, what are those fifth aspects and are they still used or usable?
Thanks!
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Post by programmes1 on Apr 30, 2021 10:21:51 GMT
I think you will find that is the auxiliary aspect no longer used but I'm sure one of the experts will confirm and give more detail.
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Post by zcap on Apr 30, 2021 13:50:31 GMT
I think you will find that is the auxiliary aspect no longer used but I'm sure one of the experts will confirm and give more detail. Sweet, thanks. Any clue what it was used for? |
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Post by Dstock7080 on Apr 30, 2021 14:28:58 GMT
I think you will find that is the auxiliary aspect no longer used but I'm sure one of the experts will confirm and give more detail. specifically auxiliary red aspect |
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Post by tut on Apr 30, 2021 22:16:15 GMT
I think you will find that is the auxiliary aspect no longer used but I'm sure one of the experts will confirm and give more detail. Sweet, thanks. Any clue what it was used for?
In the event of a lamp failure of the red or single yellow aspect of a signal the auxiliary aspect would illuminate red.
A signal displaying an auxiliary red aspect was required to be treated as a signal at danger.
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Post by jimbo on May 1, 2021 5:01:22 GMT
When do these auxiliary aspects date from? And when / why was their use abandoned? Were they interlocked with the train stops?
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Post by Dstock7080 on May 1, 2021 7:19:08 GMT
When do these auxiliary aspects date from? And when / why was their use abandoned? Were they interlocked with the train stops? Our own Harsig excellent signalling pages show they were present at the MET 4-tracking 1962: Metropolitan Line |
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Post by tut on May 1, 2021 7:52:06 GMT
When do these auxiliary aspects date from? And when / why was their use abandoned? Were they interlocked with the train stops? Our own Harsig excellent signalling pages show they were present at the MET 4-tracking 1962: Metropolitan LineAs far as I know that's when they went in. They were also installed to and north of Rickmansworth with the conversion to colour light signalling. Interestingly RJW1 at Amersham (repeating signal for the southbound home signal from Aylesbury (BR)) was provided with an auxiliary yellow light. The distants at Chesham and Chalfont & Latimer were similarly equipped. |
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metman
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Post by metman on May 1, 2021 21:05:37 GMT
I believe most of these have been decommissioned.
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Post by jimbo on May 1, 2021 23:00:47 GMT
When / why were they decommissioned? Was the trainstop linked to these? Has anyone a photo of what we are talking about?
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Post by Dstock7080 on May 2, 2021 4:44:18 GMT
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Post by jimbo on May 2, 2021 5:31:33 GMT
I can't recall mention of these aspects when I worked out on the Met, and I wonder if they had been discontinued by then. I didn't recall Chiltern route trains operating without tripcocks, which seems to be the reason for these aspects, since trainstops would stop LU trains in such failure conditions. Perhaps they were discontinued when all NR trains operating on the route were required to be tripcock fitted, so when was that? Can anyone help?
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rincew1nd
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Post by rincew1nd on May 2, 2021 16:09:34 GMT
Does anyone have a picture of these things?
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Post by Dstock7080 on May 2, 2021 16:47:37 GMT
Does anyone have a picture of these things?  ©LURS/Brian Hardy UndergrounD News 203 November 1978: |
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rincew1nd
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Post by rincew1nd on May 2, 2021 17:12:11 GMT
Thanks, I see what the earlier poster means by "heavily hooded".
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Post by jimbo on May 3, 2021 4:40:32 GMT
That photo is not in the online Underground News! Thanks. I would not have seen that as an auxiliary signal aspect. I always assumed they were A signs which illuminated when the signal box was unoccupied, and the signal was working automatically. My memory is still not jogged, so I believe these were not part of Met staff training around the time of the Underground News item. But I could be getting old!
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Post by Dstock7080 on May 3, 2021 5:56:28 GMT
That photo is not in the online Underground News! Thanks. My memory is still not jogged, so I believe these were not part of Met staff training around the time of the Underground News item. But I could be getting old! I eventually found it here: www.lurs.org.uk/UN206%20FEB%201979.pdfI can remember being told about them before being posted to Rayners Lane and Harrow cabins, but like you my memory faded over time so I didn’t contribute to this thread until I could find the evidence! |
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Post by zcap on May 4, 2021 21:28:38 GMT
Does anyone have a picture of these things? ©LURS/Brian Hardy UndergrounD News 203 November 1978: Well that explains why they're only fitted on the fast lines! Wonderful, well, thanks everyone for this wealth of information. And sorry for the thread duplication! |
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Post by MoreToJack on May 5, 2021 12:44:17 GMT
Well that explains why they're only fitted on the fast lines! Wonderful, well, thanks everyone for this wealth of information. And sorry for the thread duplication! Being pedantic, they’re only on the main lines. The fast lines are those south of Harrow. |
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Post by zcap on May 5, 2021 19:56:48 GMT
Well that explains why they're only fitted on the fast lines! Wonderful, well, thanks everyone for this wealth of information. And sorry for the thread duplication! Being pedantic, they’re only on the main lines. The fast lines are those south of Harrow. Nothing wrong with a bit of pedantry.  I didnt know that actually, I just assumed it was fast lines straight up to Watford South junction (I *think* that is the junctions' name, please correct me if I am wrong!) |
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