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A very good site, with all sorts of technical descriptions about railway technology.
I started on the railway in Northallerton, here is a small page of some photos I took inside Northallerton SB
Between 1997 and early 2000 I worked on the signalling between Ribblehead and Carlisle, - or near enough. Then our company lost the contract and we had to come back to Teesside !
The main thing in railway signalling is that it has to have some form of primary control. This is the Track Circuit. There is a voltage passed down the two rails that the train runs on, and this keeps a relay energised. When a train comes along the track, it shorts out the voltage and the relay drops, basically this makes the signalling work. To make sure you can have separate TC's, there has to be some way of stopping the voltage making its way onto other bits of rail, this is called the Insulated Block Joint, - IBJ. When all of this started, blocks of wood were used, and the most up to date version is metal blocks that are premanufactured with Epoxy Resin. In between there have been many different types, including this which has survived at Blea Moor.
The interior of every signal box is different as you will see, this is the block shelf and diagram at Blea Moor.
The insides of the block instrument
This is the underneath of Alston SB, it has been built from the ground up under the direction of the last mechanical locking fitter to pass through his aprenticeship on BR. You can tell from its condition.
As a total contrast to the above, here's the panel in Tees SB
There's a gradient profile in all signal boxes, this is the one of the S&C |
This is the one for the hill from Middlesbrough to Battersby on the Whitby line
And the diagram for the Whitby branch, in two parts
This is not the real one I realise, but it's the best photo I have of it, yes it's the Sir Nigel Gresley :-)
Horden Signal box, - on the North East Coast of England, - was removed and the lever frame was salvaged for use on the North Yorks Moors Railway.
Whilst I'm on about lever frames, it's not often you'll see a lever frame looking like this ;-) The reason was, it was Glaisdale, - on the Whitby branch, - again just before it was removed !
Here's a very well kept mechanical box, - I don't know if it's still like this, - I found it on the Skegness line in about 1980, it's Wainfleet. The original reason I took the photograph was, this is a totally different configuration of gate wheel than I was used too.
This derailments was as you can see a Tamper that was being stored for the day on this small storage siding in Thornaby Marshalling Yard, the shunter had forgotten to change the hand points, and as the class 60 hauled a full load of steel flats out of the yard towards Lackanby, it pushed the tamper over the river which is a small tributary into the river Tees and is tidal. There was mass panic because the Diesel tanks leaked! It took three days and a 500 Ton mobile crane to recover it and the loco. The crane had to be so big because there was no way they could get close enough for a smaller one. It cost many many thousands of pounds! The Tamper stood on the storage siding for something like 18 months before it was decided who's fault it had been, and it was then scrapped I believe.
I know it's not a real train, it's the brick train at Darlington.
It's got bat bricks in it, you'll find more info on bats by visiting my bats pages
This is just for fun ! How old would the bush have to have been to have been shaped this way by the passage of trains? It's not the fact that it is that shape, it's the fact that the top is curved round the top of engines !
It was at Shell junction on the Middlesbrough to Saltburn line, where the goods line went off into Tod Point and Teesport. It disappeared a few months after I took this !
We sometimes in the summer find wildlife has managed to get into the equipment, - not always to the detriment.
Yes, it's a Bluetit nest in an electric lamp for a mechanical signal.
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