The Oxford Electric Bell has been ringing almost continuously since 1840. Due to electrostatic force, the clapper is first attracted to and then repelled by each bell in turn, so it’s been ringing them alternately for 179 years.
The bell has produced about 10 billion rings to date. It holds the Guinness World Record as “the world’s most durable battery [delivering] ceaseless tintinnabulation.”
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