US Patent 7712239 Overhead adjustable track support arrangement

A system for supporting display panels from an overhead support, comprising: two or more spaced-apart, elongated, hollow, extruded fixed rails which are attachable to an overhead support together with one or more spaced-apart, elongated, hollow, extruded moveable rails. A plurality of connectors are slidably disposed within the fixed rails, the connectors having a projection extending though an elongated gap in the moveable rail and into slidable receipt in the fixed rail. The moveable rails provide support for a display supporting clip.