A grain mill has a mechanical bolter, or cylindrical sieve. Leonardo's drawing is the first of its kind. When the handle of the lens grinder is turned, both grindstone and lens revolve, at different speeds. The screw being made on the thread-cutting machine (bottom) is in the centre. The gauge of the thread is altered by changing the size of the gears. A set of gear-wheels is shown.
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Details
Creative#:
TOP18415424
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
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