driving clock
noun
1
: a mechanism for turning an equatorial telescope or a coelostat around its polar axis at the proper rate to keep a celestial body in the field of view
2
: a driving mechanism for a chronograph or other recording mechanism
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“Driving clock.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/driving%20clock. Accessed 28 Nov. 2024.
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