Templot Club Archive 2007-2020
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posted: 8 Nov 2012 18:01 from: ian espiner
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I am currently building a GW scissors crossover with old type loose heeled switches. Any bodu built any of these and how did they manage the pivot at the heel? I 've got an approach that I'm trying but if anybody has any experience or thought I'd be happy to hear them. |
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posted: 8 Nov 2012 18:55 from: Paul Boyd
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Hi Ian My latest attempt at this is shown on the appropriate page on my website at this link here. Near the bottom, photo 44. Basically, I've used a tinned copper wire omega loop soldered to the underside of the rail with high melting point solder. This gives electrical conductivity, the pivoting movement and reasonable alignment. The actual amount of movement is tiny so hopefully it won't fatigue, which is what seems to happen with PB strip soldered to the rail sides. Or maybe I did something wrong! I've also tried cast brass fishplates and plastic fishplates but these are not really satisfactory. What you could try is the omega loop combined with a loose cast brass fishplate to give more positive location. I've not tried that... ...yet  105_081350_480000000.jpg  105_081353_220000000.jpg |
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posted: 8 Nov 2012 20:05 from: Nigel Brown click the date to link to this post click member name to view archived images |
I simply shoved the rail through a single plastic chair, relying on the flexibility in the chair and rail to provide the very small amount of movement necessary. 6 turnouts done this way, and so far none have given trouble. If trouble did occur, it should be pretty easy to remedy. I'd suggest trying a simple lash-up and see what you think. |
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posted: 8 Nov 2012 20:59 from: Paul Boyd
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Hi NigelI simply shoved the rail through a single plastic chairHow do you provided electrical continuity to the switch blade? In the past I've resorted to droppers, and wire links, which felt wrong. |
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posted: 9 Nov 2012 12:00 from: Nigel Brown click the date to link to this post click member name to view archived images |
Paul Boyd wrote: Hi NigelHi Paul Droppers. All my bits of rail, except for very short bits, use droppers. Cheers Nigel |
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