Rule-Joint Hinges

These solid brass hinges are widely used for drop-leaf tables., They perform the same basic function as a back-flap hinge, but one leaf is wider than

What kind of hinges are these?

Routing a drop leaf joint? - Canadian Woodworking and Home Improvement Forum

Table Extenders & Leaf Hinges - Lee Valley Tools

The Knuckle and Rule Joints with David Charlesworth The Knuckle and Rule joints are two articulated joints that serve as hinges for the drop leaves

The Knuckle and Rule Joints - Streaming Lie-Nielsen Toolworks

Routing a Rule Joint to Make a Drop Leaf Table

Rule Joint Folding Stay Pair 3

Smooth Black Iron Rule Joint Stay

Rule Joint With The Stanley 55 Plane

Drop Leaf Hinges, 1-1/2 x 3-3/16 - Paxton Hardware

Different Joint Types: ball and socket joint, universal Joint, hinge

Drop Leaf Rule Joint Hinges - Specialty Hinges - Hinges - Browse Hardware

Rule Joint for Drop-Leaf Tables

Master the Classic Rule Joint • WoodArchivist

Antique Cabinet & Furniture Hinges Tagged Finish: Natural Brass - Paxton Hardware

Rule Joint With The Stanley 55 Plane