Polishing machine for ground disks
Belt-driven vertical spindle set in a cutaway housing
The e-Leo transcription notes only that the sheet bears no writing, but it carries a carefully drawn machine. Two oval belts pass around pulleys at the top and drive a vertical shaft that descends into a box-like housing shown in cutaway, where a head or valve sits at the base. The Codex Atlanticus catalogue identifies the device as a smoothing and polishing machine for ground (emery) disks.
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Belt-driven grinding and polishing machine
A tall vertical spindle is turned by two looped belts running over pulleys at the top of the frame. The shaft passes down into a rectangular housing, drawn open on one side to reveal the internal mechanism and a head resting at the bottom. The catalogue reads the device as a polisher for ground disks.