Leonardo' sketch of an automatic bobbin winder with an exploded view to illustrate the component parts. The crankshaft rotates the bobbin and the conn

---

Leonardo' sketch of an automatic bobbin winder with an exploded view to illustrate the component parts. The crankshaft rotates the bobbin and the connecting rod moves the bobbin back and forth continuously so that the thread is would evenly round the bobbin

---

Size: 3428px × 5099px
Photo credit: © SHEILA TERRY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1100s, 1200s, 12th, 13th, adult, ages, artwork, bleed, bleeding, blood, bloodlet, bloodletting, caucasian, century, coloured, doctor, engraving, false-coloured, female, harington, healthcare, historical, history, human, illustration, image, john, male, man, mediaeval, medica, medical, medicine, medieval, middle, patient, people, person, poem, regimen, salernitana, salernitanum, salerno, sanitatis, schola, school, science, sir, treating, treatment, white, woman, woodcut