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A Good website for mechanical boxes

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Tomnick

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Joined
10 Jun 2005
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5,876
Signalman said:
Its a fail-safe design. If a bulb blows we have to assume a train is there. What do you have?
All the boxes I sign - and, as far as I'm aware, it's standard on all non-LU lines! - have exactly the opposite. There's usually a pair of lamps (or more) per track circuit (rather than the track itself lighting up!) - so two would have to blow before a train would 'disappear'. I assume (though I can't be totally sure) that the interlocking's fail safe though - even if the lamps did fail to light, the locking would still prevent us pulling off for one.
 
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RailUK Forums

DavyCrocket

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Joined
27 Oct 2006
Messages
636
Its not standard in LUL Boxes, though I can only think of Rayners.

All the new signalling and control centres work in the "normal" (BR) way
 
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