rotary switch

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English

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Noun

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rotary switch (plural rotary switches)

  1. (electrical engineering) A switch that is operated by turning a knob.
    • 1961 October, “More programme machines for L.T. Northern line”, in Trains Illustrated, page 625, photo caption:
      A close-up of the very compact desk unit for control of the East Finchley programme machine from Leicester Square; the rotary switches at the top are used to set up the train number of any service to be added or cancelled.

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