I actually work for a company that manufactures slip rings. The concept is deceptively simple – have a ring with a certain number of “channels”. This ring touches a “broom”. Each bristle of the broom touches one of the channels. This is your connection for power or data. As the ring spins. It always maintains contact with one of the bristles. It actually has less wear and tear than having a wire bundle twist and untwist over and over. It’s more expensive, but ultimately longer lasting and provides continuous rotation.
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