Combination for use in mounting a modular system

A combination for use in mounting a modular system, said combination comprising a plurality of tubular extrusions which are interconnected by means of a plurality of connectors to define said modular system,

• each said extrusion comprising
• a longitudinal member,
• a plurality of equal spaced radial first projections which extend from said longitudinal member and run along the entire length thereof,
• each first projection being formed with continuous independent engageable means extending throughout the longitudinal direction of said projection,
• each said connector comprising
• a rod,
• engaging means articulately mounted at both ends of said rod to engage said engageable means in sliding engagement therewith,
• said engaging means having adjustable means operable to be fixedly engaged by pressing over said independent engageable means,
• means to enable articulation of said engaging means with respect to said rod essentially along a plane which is parallel to said longitudinal member,
• means for joining together a plurality of tubular extrusions in end to end relationship unidirectionally or at right angle to one another, said joining means being adapted to connect up to six tubular extrusions, said joining means being ball shaped and having at least two stud members projecting therefrom unidirectionally or at right angle to one another, said stud members being press fittingly insertable in said tubular extrusions to hold same.