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Post by programmes1 on Aug 26, 2017 9:21:27 GMT
I don't have any information such as line or location but does anyone know anything about Isolation levers, never heard of them before. TIA
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Deleted
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Post by Deleted on Aug 26, 2017 11:49:44 GMT
Only on Air Cocks
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Post by programmes1 on Aug 26, 2017 13:05:16 GMT
Now that is something to consider, but as I understood it signal levers were what was meant. |
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DWS
every second count's
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Post by DWS on Aug 26, 2017 13:21:38 GMT
I don't have any information such as line or location but does anyone know anything about Isolation levers, never heard of them before. TIA So how did you hear of them ? |
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Post by programmes1 on Aug 26, 2017 13:41:53 GMT
I don't have any information such as line or location but does anyone know anything about Isolation levers, never heard of them before. TIA So how did you hear of them ? Well it was not from you so have another guess. |
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Post by MoreToJack on Aug 26, 2017 14:30:01 GMT
So how did you hear of them ? Well it was not from you so have another guess.
Elaborating on the context and where you heard the term will assist in answering your query. There's no need to snap at a perfectly reasonable question. |
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Post by programmes1 on Aug 26, 2017 15:34:49 GMT
Well it was not from you so have another guess.
Elaborating on the context and where you heard the term will assist in answering your query. There's no need to snap at a perfectly reasonable question.Not helpful well sorry Jack but what else can one say, I was asking a question which is obvious hence the thread but I did not see it on the web otherwise I would have stated that. It was not DWS but it must have been when I was talking to someone but that person did not know they mentioned it and I was trying to find out more. I did not snap at anyone that is not how I am so please be more understanding. |
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Post by superteacher on Aug 26, 2017 15:47:07 GMT
Not helpful.
Elaborating on the context and where you heard the term will assist in answering your query. There's no need to snap at a perfectly reasonable question. Not helpful well sorry Jack but what else can one say, I was asking a question which is obvious hence the thread but I did not see it on the web otherwise I would have stated that. It was not DWS but it must have been when I was talking to someone but that person did not know they mentioned it and I was trying to find out more. I did not snap at anyone that is not how I am so please be more understanding.
Can we draw this to a close now please.
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Post by programmes1 on Aug 26, 2017 15:53:56 GMT
Not helpful well sorry Jack but what else can one say, I was asking a question which is obvious hence the thread but I did not see it on the web otherwise I would have stated that. It was not DWS but it must have been when I was talking to someone but that person did not know they mentioned it and I was trying to find out more. I did not snap at anyone that is not how I am so please be more understanding.
Can we draw this to a close now please.
ST yes we can close but had DWS read my OP I stated that I did not know what line or location, so I thought it was obvious that it had come up in a conversation with someone and that it was not DWS. |
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Deleted
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Post by Deleted on Aug 26, 2017 15:58:21 GMT
Not on SSL then or Bakerloo
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Post by programmes1 on Aug 26, 2017 16:01:27 GMT
Not on SSL then or Bakerloo I wish I had the line as it would help. |
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Deleted
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Post by Deleted on Aug 27, 2017 7:39:26 GMT
Do you mean isolation cocks as in what is fitted to the trains to isolate air equipment or air main isolation cocks to isolate the air supply to signal equipment?
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Post by nickf on Aug 27, 2017 8:20:05 GMT
I'm wondering if it could possibly refer to a lever pulled in a signal cabin to switch it out; in other words to by pass the cabin and to make it one signal section between the two cabins on either side. I have a vague recollection of King Levers connected with this, but my memory is not good!
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Post by rummer on Aug 27, 2017 10:02:53 GMT
Could it be current rail isolation switches...https://www.youtube.com/watch?v=xumonIs52Lk forward to 10 mins
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Post by MoreToJack on Aug 27, 2017 12:51:58 GMT
I'm wondering if it could possibly refer to a lever pulled in a signal cabin to switch it out; in other words to by pass the cabin and to make it one signal section between the two cabins on either side. I have a vague recollection of King Levers connected with this, but my memory is not good! This is indeed what 'King Levers' do but I've never heard the term 'Isolation lever' used in conjunction with them. Since the closure of the East London line and track rationalisation in the area, Whitechapel cabin now tends to spend a majority of the time in 'King'. All the signals operate as though they were 'automatics', with an illuminated 'A' appearing alongside the aspects. The various point work is effectively secured normal when this is the case. |
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Post by MoreToJack on Aug 27, 2017 14:41:11 GMT
Could it be current rail isolation switches...https://www.youtube.com/watch?v=xumonIs52Lk forward to 10 mins This could definitely be a possibility, although without more context from programmes1 it really is hard to be sure. As the video shows, inside the cabinets are knife switches which I suppose could be reasonably referred to as levers. However, their 'common' name across the combine is a 'section switch'. A sight slowly disappearing from the railway - particularly on the sub-surface lines at the moment - as motorised replacements are installed, better equipped to deal with the traction current voltage increase. Incidentally, that's one of my 'favourite' training videos... a shame it doesn't get shown in classes any more! They don't make them like they used to... |
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Deleted
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Post by Deleted on Aug 27, 2017 14:42:08 GMT
The points are only secured as the mechanical locking of the levers prevents movement they are not physically secured outside
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Post by MoreToJack on Aug 27, 2017 14:50:29 GMT
The points are only secured as the mechanical locking of the levers prevents movement they are not physically secured outside Indeed! In my aim to keep things simple I perhaps over-simplified.  For completeness it's also worth mentioning that in some areas that aren't controlled by a local Cabin a variation on 'King' working can be implemented - auto-through working. It effectively does exactly the same thing by operating all the signals automatically by the passage of trains, locking out (better phrase...!) any points and crossings and removing control from the signalling centre. |
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Deleted
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Post by Deleted on Aug 27, 2017 16:05:23 GMT
On a remote site the feed to the air motors which operate the levers is removed when King / Auto is selected so the levers stay Reverse and thus the site becomes an auto area
On a manual frame I.e Whitechapel once the switch is operated this bypasses the relay which makes the signaller re stroke the lever
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Post by rummer on Aug 27, 2017 18:32:48 GMT
King lever if I remember from my cabin days was a blue lever, mostly used when no reversers or when we needed a PNR (personal needs relieve)
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Deleted
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Post by Deleted on Aug 27, 2017 19:06:19 GMT
King Levers were indeed Blue
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