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Post by chris on Jul 19, 2005 14:56:30 GMT
How many signals are there on the whole tube system?
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Post by q8 on Jul 19, 2005 15:06:06 GMT
Cor blimey Chris you don't half pose 'em don't yer?
That is a question that will take time to answer as the guys will have to look at the operations books to tally them up. Maybe Mr Harsig or Citysig can answer a bit quicker but I doubt it.
But to give you an idea. Take as an average (average mind) 3 home signal, one starter and one advance starter for each station and you'll have a very rough estimate. Then double it.
Lightbulbs can be estimated by saying three for each signal and each bulb is double filamented. (not counting pigs ears)
That is only colour light signals. Disk signals NOT included. At a very rough geuss I would say over 5000
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Post by chris on Jul 19, 2005 15:16:13 GMT
I originally wanted to know how many lightbulbs are in use in all the signals, but I thought maybe that was too much to ask!
Me and my curious mind!
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Post by Deleted on Jul 19, 2005 15:50:59 GMT
some have one per aspect but the tunnel signals two per aspect not all signal bulbs have 2 filaments , theres only 1 bulb which has 2 filaments and that is a 100v 33 1/2 W .
they may get round and put LED type lenses in
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Post by russe on Jul 19, 2005 16:41:16 GMT
I don't want to be over-scaremongering, but there is a health and safety issue here. All LEDs are lasers, i.e. they emit narrow-band ('coherent') light. Whilst most common visible LEDs are classed as 'class 0' lasers, I'm not sure I'd be too chuffed if I was a driver at the prospect of having laser beams pointing directly at me all day long, particularly in tunnel environments. The occasional LED ground disc is one thing, but a wholescale change for mainbeam signals is quite another.
Filament bulbs are better for your eyes.
Russ
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Post by Deleted on Jul 19, 2005 17:02:03 GMT
I don't want to be over-scaremongering, but there is a health and safety issue here. All LEDs are lasers, i.e. they emit narrow-band ('coherent') light. Whilst most common visible LEDs are classed as 'class 0' lasers, I'm not sure I'd be too chuffed if I was a driver at the prospect of having laser beams pointing directly at me all day long, particularly in tunnel environments. Parts of the Jubilee line extension have had LED signals for some time now, as are most train tail lights. |
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Post by citysig on Jul 19, 2005 17:59:52 GMT
At a very rough geuss I would say over 5000 Very rough. Multiply that by a few more and you might come a bit closer. There are well over 1000 (maybe closer to 2000) on the Met line alone. This is adding in shunts, draw ups and the many many signals just within the confines of Neasden Depot. |
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Post by cajim on Jul 19, 2005 18:43:35 GMT
IN my area of California all the trafic signals are led now. They changed over Red first and the did the green and yellow. They have a very long life and many of the leds can go out before the signal fails
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Post by Colin D on Jul 19, 2005 19:38:53 GMT
I imagine there'd alot less now with the introduction of ATO, or are their just as many sticks between statons?
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Post by Christopher J on Jul 19, 2005 19:57:28 GMT
I imagine there'd alot less now with the introduction of ATO, or are their just as many sticks between statons? If you count the *Block Section Markers (part of the Central Line signalling, see www.davros.org/rail/signalling/articles/central.html for more info) as Signals, there's more. * = AFAIK Block Section Markers are really called Block Marker Boards...?  But the Central Line Signalling page suggests different... |
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Post by q8 on Jul 19, 2005 21:07:36 GMT
Talking of LED signals. Last week me and the landlord went to Hexham on the bus for market day. At Stocksfield they had the road up (again) and were using temporary traffic lights. These TTL's were LED ones!! First time I've ever seen them. Anyone else noticed them on their travels?
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Post by citysig on Jul 20, 2005 9:01:03 GMT
These TTL's were LED ones!! First time I've ever seen them. Anyone else noticed them on their travels? They seem to be all the rage in Devon. Saw lots of sets of them when I was down there (lots of blooming roadworks as well!) There's a new crossing they are putting in round my way and that appears to be LEDs. The lens looks flatter and more streamlined than "older" lights. |
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Phil
In memoriam
RIP 23-Oct-2018
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Post by Phil on Jul 20, 2005 9:36:37 GMT
These TTL's were LED ones!! First time I've ever seen them. Anyone else noticed them on their travels? Yes, but you can only use them in well-populated areas. I was involved in a road job in the middle of rural Wiltshire and they had to swap back coz the heads kept getting stolen overnight on the quiet road. They are several hundred quid a time, work off the mains and can be made to link up with disco lights...say no more!!!! |
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Tom
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Signalfel?
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Post by Tom on Jul 20, 2005 11:02:51 GMT
If you count the *Block Section Markers (part of the Central Line signalling, see www.davros.org/rail/signalling/articles/central.html for more info) as Signals, there's more. * = AFAIK Block Section Markers are really called Block Marker Boards...? But the Central Line Signalling page suggests different...You are correct, they are block marker boards. While Clive Feather may know a fair bit, it isn't the first time he's made (large) innacuracies with centrall line signalling matters. |
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Post by zman on Jul 29, 2005 18:15:37 GMT
Almost all of our signals are LED's, and they're super bright too (I hate them). Takes a bit of getting used to.
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Post by q8 on Jul 29, 2005 18:21:46 GMT
I don't want to be over-scaremongering, but there is a health and safety issue here. All LEDs are lasers, i.e. they emit narrow-band ('coherent') light. Whilst most common visible LEDs are classed as 'class 0' lasers, I'm not sure I'd be too chuffed if I was a driver at the prospect of having laser beams pointing directly at me all day long, particularly in tunnel environments. The occasional LED ground disk is one thing, but a wholescale change for main beam signals is quite another.
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I should think the answer to that is to angle the lens slightly downward. O r am I being naive?
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Post by Deleted on Jul 29, 2005 20:49:34 GMT
now all this fuss about led's i mean they are in everyday things now like cars,buses i can see the health and safety side of it though dont get me wrong
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Post by citysig on Jul 30, 2005 13:30:35 GMT
now all this fuss about led's i mean they are in everyday things now like cars,buses i can see the health and safety side of it though dont get me wrong I should think many people, like me, are staring a few in the face as they post here. I have a couple on my monitor, a couple on my keyboard, one on the stereo next to me, one flashes each time I change the TV channel. I am sure by now that those people more technical than me have worked out which lasers to stick where. Give the cutting-type lasers to people like James Bond, and give the little twinkly ones to people who make things that light up. Used in the wrong way, everything is dangerous. |
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Post by yellowsignal on Aug 2, 2005 10:56:49 GMT
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Post by Deleted on Aug 2, 2005 12:21:29 GMT
The Piccadilly Line has quite a lot of LED signals, that have been Incorporated into the existing Signal Heads, I must admit, the are much better, as they are brighter and much stronger.
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Post by Deleted on Aug 2, 2005 12:24:02 GMT
you sure they have the only ones i know about are at canning town on the jle
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But the Central Line Signalling page suggests different...
