Historical Mechanical Device Diagram - Labeled Engineering Sketch #3469302 (License: Personal Use)

This black-and-white technical illustration depicts a mechanical assembly featuring a threaded rod (3), a U-shaped bracket (2, 4), securing screws (12, 13, 14), and flat mounting plates (10, 15, 18) with oval holes (20). The drawing uses hatching and perspective to convey depth and component relationships, typical of patent or instructional schematics from the late 1800s. Each part is numerically referenced, suggesting its use in a formal specification or manual.

Commonly used in historical engineering archives, patent documentation, or educational resources on mechanical design evolution; serves users seeking primary-source technical drawings for research, restoration, or academic study.