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Even better than a cart of apples
(lemmy.world)
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this post was submitted on 24 Nov 2024
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Those are things that regulate the tension in the overhead cables on 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.
These are so simple and yet so clever. When i noticed them the first time i started noticing them everywhere (on all rail infrastructure).
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
Is it simple? It looks quite complicated, but maybe that's just me forgetting how to compute forces.
simple in that it's just a clever series of wires and pulleys, not some sort of digital adjustment device, i suppose
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.
There's a video about this that explains it pretty in depth.