Vintage Patinated Copper Victorian Drafting Pantograph Seed Feeder

Construct the base frame using mahogany, milling precise mortise and tenon joints to form the adjustable parallelograms found on a traditional pantograph. Ensure the pivot points are reinforced with brass hardware to allow for smooth articulation of the feeder arms.

Fabricate the seed reservoir using sheet copper, shaping it into an apothecary-style hopper that hangs from the primary extension arm. Apply a chemical patina treatment to the copper to achieve an aged, weathered aesthetic consistent with historical scientific instruments.

Integrate a gravity-fed aperture at the base of the hopper that aligns with a circular seed tray positioned on the lower arm. Install a fine-mesh brass screen at the bottom of the tray to allow for proper drainage and to prevent debris from accumulating.

Finalize the assembly by mounting a counterweight mechanism to the rear arm to maintain balance regardless of seed volume. Apply a protective satin wax finish to the wood and a clear lacquer to the copper to preserve the intricate mechanics against outdoor elements.