RMweb Premium jamie92208 Posted February 14, 2017 RMweb Premium Share Posted February 14, 2017 I dunno why they didn't just use solenoids, like we do....... The quotes about speed of operation ring true, is that why there are so many one footed pigeons hopping around New Street. Jamie Link to post Share on other sites More sharing options...
RMweb Gold TheSignalEngineer Posted February 14, 2017 RMweb Gold Share Posted February 14, 2017 I dunno why they didn't just use solenoids, like we do....... They did actually. The solenoid opened the valve for the air to go to the piston. This made operation very fast on hump points as withouit any locking it was just a direct acting ram with an approx 6" diameter piston which at normal working pressure would give a force of about 1400lb. Link to post Share on other sites More sharing options...
jim.snowdon Posted February 14, 2017 Share Posted February 14, 2017 The quotes about speed of operation ring true, is that why there are so many one footed pigeons hopping around New Street. Jamie It is also why they were virtually standard on the London Underground until quite recently. Jim Link to post Share on other sites More sharing options...
RMweb Gold tom shaw Posted February 17, 2017 Author RMweb Gold Share Posted February 17, 2017 Following the receipt of all the good information I re-examined some pictures I had of Tyne Dock and found the following which I have zoomed in on to show some point motors, this seems to agree with what people have been saying. Also shown is some unusual trough which I haven't seen before. Is it concrete and what is the pattern on the lid ? Regards, Tom Link to post Share on other sites More sharing options...
Trog Posted February 19, 2017 Share Posted February 19, 2017 Is it just damp/water sitting on the lids as their top surface is slightly dished? Link to post Share on other sites More sharing options...
RMweb Gold TheSignalEngineer Posted February 19, 2017 RMweb Gold Share Posted February 19, 2017 More likely oily footprints where the PWay has walked on them. Link to post Share on other sites More sharing options...
Trog Posted February 19, 2017 Share Posted February 19, 2017 More likely oily footprints where the PWay has walked on them. Bit of a mystery the spacing is not right for the PW who would have walked at sleeper spacing length steps, and the S&T would not have got their boots that dirty sleeping in their van. Link to post Share on other sites More sharing options...
Mark Saunders Posted February 19, 2017 Share Posted February 19, 2017 Bit of a mystery the spacing is not right for the PW who would have walked at sleeper spacing length steps, and the S&T would not have got their boots that dirty sleeping in their van. I seem to recall troughing with holes in the top like this, there must be some left lying down the bankside somewhere? Mark Saunders Link to post Share on other sites More sharing options...
Trog Posted February 19, 2017 Share Posted February 19, 2017 What looked like troughing with holes in the top was generally channel drainage, usually found in the cess in cuttings. Link to post Share on other sites More sharing options...
RMweb Premium kevinlms Posted February 19, 2017 RMweb Premium Share Posted February 19, 2017 I dunno why they didn't just use solenoids, like we do....... Ah but there was pioneer installations that did! IIRC correctly the 2 original installations, back in the distant past, at Crewe used a solenoid based system. It wasn't extend beyond the 2 installations & didn't last long. Perhaps the problem was getting big enough capacitors for the CDU? Link to post Share on other sites More sharing options...
micknich2003 Posted February 20, 2017 Share Posted February 20, 2017 I have numerius pictures of Hull Paragon, but all show "Boxed in Point Motors" and therefore no use. I suggest treating yourself to this tome. Link to post Share on other sites More sharing options...
Mark Saunders Posted February 20, 2017 Share Posted February 20, 2017 Following the receipt of all the good information I re-examined some pictures I had of Tyne Dock and found the following which I have zoomed in on to show some point motors, this seems to agree with what people have been saying. Also shown is some unusual trough which I haven't seen before. Is it concrete and what is the pattern on the lid ? tyne dock point motors.jpg Regards, Tom It should also be remembered that the Propane pipes for the point heaters were in the same troughing! Is the photo Tyne Dock or Tyne Yard? Mark Saunders Link to post Share on other sites More sharing options...
RMweb Gold tom shaw Posted February 20, 2017 Author RMweb Gold Share Posted February 20, 2017 It should also be remembered that the Propane pipes for the point heaters were in the same troughing! Is the photo Tyne Dock or Tyne Yard? Mark Saunders Mark, The photo is Tyne Dock near to Green Lane signal box and looks to have been taken around 1960 to 62 Regards, Tom Link to post Share on other sites More sharing options...
Mark Saunders Posted February 20, 2017 Share Posted February 20, 2017 Mark, The photo is Tyne Dock near to Green Lane signal box and looks to have been taken around 1960 to 62 Regards, Tom Tom Thanks, alas I never saw Green Lane till after it had been decimated and the new Tyne Coal Terminal had been built in the mid 1980's! Mark Link to post Share on other sites More sharing options...
RMweb Gold tom shaw Posted February 21, 2017 Author RMweb Gold Share Posted February 21, 2017 Tom Thanks, alas I never saw Green Lane till after it had been decimated and the new Tyne Coal Terminal had been built in the mid 1980's! Mark See link for a splendid photo https://www.flickr.com/photos/geoffsimages/9111029566 Tom Link to post Share on other sites More sharing options...
cheesysmith Posted February 22, 2017 Share Posted February 22, 2017 Could the troughing lids be bolted down? It looks just like the square plates that the bolts pass through when they bolt the lids down to prevent theft of the cables. Link to post Share on other sites More sharing options...
EL-3A Posted March 6, 2017 Share Posted March 6, 2017 Does anyone know when the SR started using power operated point motors and concrete concrete boxing for lineside traction cabling ? Link to post Share on other sites More sharing options...
jim.snowdon Posted March 6, 2017 Share Posted March 6, 2017 Looking at the dates for the Westinghouse miniature lever frames, which could only work with power operated points, June 1926 would be a good start, when the first K lever frames were installed at Charing Cross and Cannon Street, with Borough Market Junctin and London Bridge the following year. Concrete "boxing" is a more difficult question. The DC traction feeder cables of that era were normally laid in wooden trunking on the ground, and the high voltage AC cables usually on elevated post routes, although there may have been locations where this may not have been practicable and they may have been laid in, most likely, asbestos cement troughing. Otherwise, the obvious candidate would be the signalling cables, of which there would have been a lot in the areas that were converted to colour light signalling. Jim Link to post Share on other sites More sharing options...
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