time ball meaning

  "time ball" in a sentence
  A ball mounted on a vertical pole, eg on top of a high building, that drops at a regular point in each day as an indication of mean time


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  1. time balls were used in many ports during the nineteenth century
  2. its use diminished in 1907 when the time ball apparatus was removed to signal hill
  3. but the tradition of dropping a time ball reportedly began in the eighteen hundreds in england
  4. three years later, officials added a time ball to count down the seconds to the new year
  5. The first American time ball went into service in 1845.

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