Constant module system

Claim 1

A hollow generally rectangular modular construction unit constructed with a plurality of generally similar end frames which are joined together to form the generally rectangular modular construction unit, said modular construction unit comprising: a. a first pair of opposed spaced-apart generally parallel end frame segments, b. a second pair of opposed spaced-apart generally parallel end frame segments, c. each of the end frame segments in said first pair of segments being substantially identical in construction to the end frame segments in said second pair of end frame segments, d. each of said end frame segments comprising; 1. a first limb, a. said first limb having a pair of spaced-apart plates, b. extension means connecting said plates together in said spaced-apart relationship, c. means forming an elongated slot at one end of said first limb between said plate, d. one of said spaced-apart plates having an outwardly presented first connecting end wall, e. the other of said second-apart plates having an outwardly presented second end wall, 2. a second limb at a mutually angled relationship with respect to said first limb, a. said second limb having a plurality of angularly located side walls forming a hollow tubular member, b. projection means extending outwardly from the plane of one of said side walls and being sized for snug fitting disposition within the slot in said first limb, e. said first pair of said end frame segments being capable of being joined together to form a first end frame, f. first connecting means for connecting the first pair of end frame segments together to form the first end frame, g. said second pair of end frame segments being capable of being joined together to form a second end frame, h. second connecting means for connecting the second pair of end frame segments together to form the second end frame, i. said first and second end frames capable of being joined together to form a generally rectangular modular unit, j. third connecting means for connecting the first end frame to the second end frame to thereby form said generally rectangular modular unit, k. a first generally rectangular base member for use with said first end frame, l. a second generally rectangular base member for use with said second end frame, m. each of said base members being substantially identical in construction and 1. each said base member having first and second pairs opposed and generally side margins, 2. each said base member also having a first generally planar major surface, 3. each said base member further having a second generally planar major surface opposed to said first major surface, n. first securement means for connecting each of the first pair of side margins of the first base member to the respective connecting end walls of the first pair of end frame segments in the first end frame, o. second securement means for connecting each of the first pair of margins of the second base member to the respective connecting end walls of the second pAir of end frame segments in the second end frame, p. the connecting walls of the end frame segments in each said pair of end frames being located in abutting engagement with each of the respective first pair of side margins of the associated base members, q. the end frame segments in each of said pair of end frames extending outwardly and in generally perpendicular relationship to the opposed planar major surfaces of the associated base members, r. said first and second base members each having one of their margins in the second pair of parallel side margins in juxtaposed abutting engagement when the first and second end frames are connected together, and s. the first generally planar surface of each of said first and second base members are coplanar and generally coextensive when the first and second end frames are connected together.