TEETEE:
The nice thing about copper or bronze blades and mating sockets from knife switches is that they use a concept called "wiping" which simply means that the clean themselves off every time they come together. Technically, they exhibit a concept known as "contact follow" which means that there is a bit of springiness (as you pointed out in your invention) that ensures that the mating surfaces bend a little when mated. This helps the wiping action.
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