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50.0 MB (50.0 MB compressed)
3428 x 5099 pixels
29.0 x 43.2 cm ⏐ 11.4 x 17.0 in (300dpi)
SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
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.
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