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

Pulling device

Dimensions:65x14x65 cm
Materials:durmast, iron, rope
Constructor:Nuova SARI, Firenze
Date:1995

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Working model after Leonardo da Vinci, Madrid Ms. I (BNM), fol. 44v

The external pulleys are fixed. The internal ones are driven by the crank toward the wheel's outer rim, moving the rods to which they are connected. As the rods straighten, they exert a traction force toward the center. Leonardo may have thought of using the machine for a textile-processing operation.

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