Silk-doubling machine

Silk-doubling machine

Silk-doubling machine

Inv. 6636
Interpretation by Guido Gallese, 1939

Doubling is the operation of combining more than one thread string by twisting in order to obtain a thread that is stronger and more stable and elastic. Leonardo studied the spindles for silk utilized in Milan and proposed certain improvements, so as to be able to realize, with a single movement by the operator, the combining and twisting of two threads. The models is constituted of a vertical structure on which two spools are positioned above, with the two starting threads. The thread passes through two eyelets in an arm that stretches them taut, before twisting and wrapping them onto the spindle.

The model is based on the drawing:

  • Codex Atlanticus f. 103a r. (1497)
    Milano, Biblioteca Ambrosiana