US Patent 7159365 System for making walls

In a system for making walls, at least two pairs of connector plates are provided, each including receptacle for receiving an end of a structural member. At least one spacer plate is located between and rotatably coupled to successively positioned connector plates. To form a wall, a pair of connector plates is coupled via the retaining means, one to each of a pair of generally opposing ends defined by structural members. The connector plates are rotatably movable relative to the spacer plates thereby allowing the structural members to be oriented relative to one another so as to form a surface having desired contours.