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Comment on Even better than a cart of apples

LegoBrickOnFire@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

Those are things that regulate the tension in the overhead cables in train tracks. With the variation of temperature cables tend to contract/expand and this systems allows the cables to do so freely with a constant tension provided by the weights.

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verstra@programming.dev ⁨4⁩ ⁨weeks⁩ ago
These are so simple and yet so clever. When i noticed them the first time i started noticing them everywhere (on all rail infrastructure).

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- RubberElectrons@lemmy.world ⁨4⁩ ⁨weeks⁩ ago
  I as well. Seattle transit, NEC Amtrak and NJ transit live off of these. If these systems work for them, they’ll work for us all
  
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- someacnt_@lemmy.world ⁨4⁩ ⁨weeks⁩ ago
  Is it simple? It looks quite complicated, but maybe that’s just me forgetting how to compute forces.
  
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  - Swedneck@discuss.tchncs.de ⁨4⁩ ⁨weeks⁩ ago
    simple in that it’s just a clever series of wires and pulleys, not some sort of digital adjustment device, i suppose
    
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    verstra@programming.dev ⁨4⁩ ⁨weeks⁩ ago
    Also, you are looking at a few different wires at once here. Each separate wire is tensioned with a mechanism with a few moving parts.
    
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drosophila@lemmy.blahaj.zone ⁨4⁩ ⁨weeks⁩ ago
There’s a video about this that explains it pretty in depth.

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