Patent Diagram of Y-Shaped Mechanical Support Structure - Engineering Blueprint #206090 (License: Personal Use)

This black-and-white technical illustration depicts a Y-shaped mechanical support or base structure, likely from an early 20th-century patent, featuring numbered annotations (1-13) identifying key elements such as the central hub (10-13), flanged arms (6, 7, 8), and reinforcing ribs (4). The cross-sectional view reveals internal contours and material thickness variations, suggesting use in heavy machinery or furniture bases. Hatching indicates solid material, while dashed lines denote hidden features or assembly interfaces.

Used on engineering history sites, patent archives, or industrial design blogs to illustrate vintage mechanical innovations; serves users researching historical manufacturing techniques, patent analysis, or structural engineering principles.