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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.
There's a video about this that explains it pretty in depth.
These are so simple and yet so clever. When i noticed them the first time i started noticing them everywhere (on all rail infrastructure).
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.
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