Historical Patent Diagram of Mechanical Filter Device with Mesh Screen and Crank #274650 (License: Personal Use)

This black-and-white technical drawing depicts a circular filtration or screening device from an early industrial patent, likely late 19th or early 20th century. Key components include a fine grid mesh (element 13), concentric sealing rings (6, 4), a central horizontal shaft (10-11) with adjustable or replaceable filtering segment (15), and a hand-crank (18) for manual rotation. Numerical callouts indicate precise assembly details for manufacturing or legal documentation purposes.

Used in historical engineering archives, patent databases, or educational resources on mechanical design evolution; serves users researching vintage filtration systems, industrial machinery patents, or technical illustration styles.