🛠️ Invention or technique

Al-Muradi's epicyclic and segmental gears

Engranajes epicicloidales y de sector de al-Muradi

Date
c. 1050 · confidence medium
Place
Cordoba, Andalusia, Spain
Credited to
Ibn Khalaf al-Muradi
People
👤 Ibn Jalaf al-Muradí
Field
Tools

⚠️ Disputed: the sources disagree.

What it is

His Kitab al-Asrar fi Nata'ij al-Afkar describes water clocks and automata with complex gear trains, including epicyclic and segmental gears. It is the oldest treatise on mechanical engineering from al-Andalus.

The only manuscript (Florence, Biblioteca Laurenziana) is badly damaged and its technical interpretation is partial; his exact place of work in al-Andalus is unknown.

What it led to

  • monumental Andalusi water clocks
  • segmental gears of al-Jazari
  • transmission of mechanical clockwork to Latin Europe
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Sources✓ verified 2026-09-25