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Post by railtechnician on Jan 7, 2011 3:46:54 GMT
Guys, as promissed I have been trawling through photo sites looking for images to illustrate the comments I made in the recent '4-rail without tears' thread. Unfortunately most photographers are more interested in rolling stock and stations than trackside kit but I have found some images that you may wish to peruse to see the detail. I have put brief comments below each but feel free to ask questions. www.flickr.com/photos/markhillary/2538535862/sizes/l/in/photostream/Picc line kiosks www.flickr.com/photos/billyhill/52937544/Cows udder link boxes www.flickr.com/photos/13725713@N03/2550383007/sizes/z/in/photostream/signal location of 4 cases www.flickr.com/photos/alexisn/3247661357/in/photostream/fibre optic joint box and 'remake' frame www.flickr.com/photos/mmmmnl190709/3739594768/signal location, cases and 600v link box above www.flickr.com/photos/jvk/130774707/signal cable runs, telephone cable MDF kiosk in background www.flickr.com/photos/mitchelljp/4011195710/sizes/l/in/photostream/BR and LT type (rusty) kiosks www.flickr.com/photos/doyoumindthegap/2843136314/sizes/l/in/photostream/new type point heater kiosk in centre, relay case on retaining wall to left www.flickr.com/photos/fray_bentos/418648208/sizes/o/in/photostream/EC34 signal location, 600v link boxes, transformer, condenser & relay cases www.flickr.com/photos/45704384@N06/4424583001/HT, Signal & Comms cable runs www.flickr.com/photos/24772733@N05/3528779201/sizes/l/in/photostream/Signal location, signal kiosk with signal head directly mounted above, a pair of relay cases on straps between two posts www.flickr.com/photos/version-3-point-1/2456407097/signal cable runs old, furthest away, and new www.flickr.com/photos/version-3-point-1/464545603/a pair of signal locations in the background, 600v link boxes above transformer cases, other cases are condenser & relay cases www.flickr.com/photos/version-3-point-1/140525372/cable bridges, also known as radii (a single cable bridge is a radius) |
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Post by metroland on Jan 7, 2011 11:59:41 GMT
Thanks railtechnician, very informative.
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metman
Global Moderator
5056 05/12/1961-23/04/2012 RIP
Posts: 7,400
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Post by metman on Jan 7, 2011 18:05:16 GMT
Thank you, love the one at Queens Park!
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Post by railtechnician on Jan 7, 2011 22:56:03 GMT
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Post by railtechnician on Jan 8, 2011 6:03:12 GMT
A further trawl through Flickr albums has produced the following. www.flickr.com/photos/tompagenet/2233599092/sizes/l/in/photostream/A decent view of an LT signal relay kiosk with signal mounted above, also to the left is the new type 600v signal main link box, also a good close up view of a typical signal 4 way bracket run and 11KV 4 way bearer run behind farm1.static.flickr.com/112/306851410_88c00b7593_b.jpgA decent view of a three foot location in the six foot, 3 aspect dwarf signal behind which is the glass enclosed (GE) electro pneumatic (EP) valve for the J type trainstop in the foreground. Below the valve is the 10 core box for the signal and valve circuits, this would be connected via 3 or 5 screen 'snake' cable to a combined termination box (CTB) like the one on the brickwork behind. I can't actually see the10 core box 'snake'. www.flickr.com/photos/33034078@N00/4200125770/A better image of a dwarf signal and its 10 core box in which the 3 screen ribbed 'snake' can clearly be seen www.flickr.com/photos/nicksignal/3401826055/sizes/l/in/photostream/4 aspect signal head mounted on parapet wall, in the background original 8 way signal bracket run with new two way bracket run piggybacked above and brackets on the reverse bearing what I guess to be the new train radio radiating cable clipped to bracket lips and another cable in the run. www.flickr.com/photos/dgbalancesrocks/360069656/wall mounted post, access platform and hooped ladder to two aspect signal head www.flickr.com/photos/24772733@N05/4927044583/sizes/l/in/photostream/2 aspect signal location, HO type trainstop, 10 core box with 'snakes' mounted on single post then trainstop GE valve, relay case, condenser case and two more relay cases on dwarf location with track circuit disconnection boxes (TDBs also known as 'diddy' boxes) mounted back to back above. Heston red air hose from GE valve to air main and trainstop, track hoses snaking away to rail pigtail connections, lead cables from location disappear into troughing beneath the ballast crossing under the track to the signal bracket run. Nice new aluminium current rails, in the foreground a 630v 'jumper' cable bridging current rails around trainstop. www.flickr.com/photos/juliang2006/300270769/sizes/l/in/photostream/looking towards Northfields leaving Boston Manor, three kiosks on the left hand side. The nearest is painted green and is the main telephone cable main distribution frame (MDF), bolted on the near side is a grey 2 megabit PCM transmission system repeater. The two signal kiosks are painted silver, first is the repeating signal kiosk and IIRC the second signal kiosk is the speed control (inductor rail frequency relay and amplifier) kiosk for the approach of WR1A outer home signal. The inductor rail can be seen to the right of the 4th and 5th cars. www.flickr.com/photos/25347284@N04/5285316224/sizes/l/in/photostream/Brand spanking new cable run supported on I girders and literally dwarfing the existing runs in the area, lots of modelling scope for cable runs, almost anything goes nowadays. The brackets themselves could be a challenge but basic girder, angle and strap has been available as a scale modelling material for as long as I can recall. www.flickr.com/photos/glediator/219217655/Vane type signal relays, only one such relay can fit in a trackside relay case, as many as four or six may be accommodated in a trackside kiosk although trackside kiosks more usually contain the smaller more modern Q type relays as they also accommodate track transformers and condensers and incorporate the 600v signal main link box. www.flickr.com/photos/glediator/219220945/sizes/l/in/photostream/massive double sided cable bridge with walkway between the two bracket runs, in the foreground a small double cable radius to allow staff access to the relay room/IMR. Lots of modelling scope here for those interested in cable runs. www.flickr.com/photos/jasonyates07/3470881669/sizes/l/in/photostream/old 4 way signal bracket run, new 5 way signal bracket run and connect radio cable, vertical comms 'admiralty tray' run well populated with cables. |
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Post by phillw48 on Jan 8, 2011 9:56:34 GMT
The Goldhawk Road photograph also shows details of the ends of the current rails, both 'leading' and 'trailing' also the ramp protecting the rail, very useful for any one who wants to model 4 rail. Also there is what looks like a piece of stray timber with a charred end touching the end of the live rail!
In the following photograph is shown fencing topped with either barbed or razor wire, if you want to model something similar both are available from military modelling suppliers (ask for 1/72 scale).
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Post by railtechnician on Jan 8, 2011 10:21:48 GMT
The Goldhawk Road photograph also shows details of the ends of the current rails, both 'leading' and 'trailing' also the ramp protecting the rail, very useful for any one who wants to model 4 rail. Also there is what looks like a piece of stray timber with a charred end touching the end of the live rail! In the following photograph is shown fencing topped with either barbed or razor wire, if you want to model something similar both are available from military modelling suppliers (ask for 1/72 scale). When I looked carefully at that image I refrained from commenting on the lump of wood, however, I do believe it was deliberately placed to support the traction jumper so as not to compress the air hose feeding the trainstop valve and potentially causing a trainstop failure through air starvation. It is not unknown for careless placement of heavy feeders, spare rails and sleepers to cause such a failure and though I would expect the aluminium traction jumper to be lighter than the older 935mm2 ribbed copper version I think it still has plenty of weight to it. |
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Post by railtechnician on Jan 8, 2011 10:30:35 GMT
Today's quiz pic is interesting showing J type trainstop and wooden ramp as well as what appears to be a bolt-on pozzi ramp. Spot the trainstop GE valve across the track behind the fence and in front of the cable run on its own post, the hose passes through tamper duct to half inch GI pipe through the platform en route to the valve. www.sucs.org/~cmckenna/photos/quizes/tq2011/January/Jan08.jpg |
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Tom
Administrator
Signalfel?
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Post by Tom on Jan 9, 2011 8:14:37 GMT
I would expect the aluminium traction jumper to be lighter than the older 935mm2 ribbed copper version I think it still has plenty of weight to it. I believe that we still use the 935mm 2 cable for traction current, though it isn't ribbed any more. |
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Post by railtechnician on Jan 9, 2011 14:12:30 GMT
I would expect the aluminium traction jumper to be lighter than the older 935mm2 ribbed copper version I think it still has plenty of weight to it. I believe that we still use the 935mm 2 cable for traction current, though it isn't ribbed any more. I had wondered about the csa assuming the jumper to be aluminium as well, back in the 1970s when I was a young PO telephone engineer and there was a world copper shortage we installed aluminium distribution cables for a year or two but there were problems in that the resistance for the same csa is higher for aluminium. I first saw the unribbed traction jumpers when Liverpool Street Central line substation was being replaced during the Central line resignalling and the sub gaps were bridged out for several months, however, I believe those jumpers were copper. I watched the contractors recover the scrap and cut it into one metre lengths when it was eventually lifted circa 1995. |
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