Searchlight signals

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Tomnick

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Trying to think how best to explain it! Put simply - it means that rather than having three separate lights on a three-aspect signal, you'd have just the one on a searchlight signal, that's capable of displaying all three colours (red, yellow, green). This used to be achieved mechanically in the older installations by moving a disc with different coloured lenses in front of the light, but newer ones - as with the North Staffs resignalling, I suspect - use LED technology to achieve the same effect.

Note that the searchlights in question also have to have a second light mounted above, in order to display the second yellow required for the YY aspect!
 

nutter

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I know what you mean, and i think you are right. One lens can display Green, yellow and red using LED's and there is a second LED above which can only present Yellow. (I've seen this on another forum).
Thanks.

I've cheered up now, ATW had cancelled a train this morning which really wound me up because I was supposed to spend the day with the TA. BVE and simsig can work wonders sometimes
 

O L Leigh

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Perhaps in your neck of the woods...

The recently West Anglia re-signalling saw the introduction of LED ground position light signals, but we got standard 4 aspect signal heads for main aspect signals. Interestingly, these replaced the old style 4 aspect searchlight signals with rotating coloured filters.

one TN
 

Nick W

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Tomnick said:
This used to be achieved mechanically in the older installations by moving a disc with different coloured lenses in front of the light, but newer ones - as with the North Staffs resignalling, I suspect - use LED technology to achieve the same effect.

Oh I thought it was still done mechanically as I have seen the ones at colcheter flicker and go via yellow from green to red as if they are still the ones that one TN mentioned were replaced.
 

Z12XE

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Maybe because Colchester want resignalled as part of the WARM? (which is quite understandable.....!)

Colchester-Clacton resignalling is 2007+
 

andel

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I think they have searchlights between Leamington and Banbury too (well, they did yesterday when I went along there)
 
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