Online Exhibits > Leonardo and the Engineers of the Renaissance > Models

Differential screw

Dimensions: 70x50x12 cm
Materials: ash, oak, metal
Constructor: Muséo Techni, Montréal
Date: 1987

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Working model after Leonardo da Vinci, Madrid Ms. I (BNM), fol. 33v

The invention of this type of screw was traditionally attributed to Hunter (1781). It is used to apply extreme pressure in machines such as hand and hydraulic presses.

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