Two part portable chair construction

A chair construction of two separate yet cooperating structural elements comprising:

• a first element including:
• first and second symmetrical elongated side members spaced apart and parallel and having substantially parallel forward and rear major edges,
• a first series of parallel, slightly spaced apart slats aligned transversely and secured rigidly, to said forward edges of said first and second side members along an upper portion thereof to provide a backrest;
• a first single slat aligned transversely and secured rigidly to said forward edges of said first and second members at a location spaced away from the lowermost slat of said first series to define thereby a transverse gap therebetween of a dimension generally corresponding to the distance across said first and second members from said forward to said rear edges thereof;
• a second single slat secured transversely across even rear edges of said side members at a location defining the top boundary of said gap at the back of said first element;
• a third single slat aligned transversely and secured rigidly across even rear edges of said side members at a location defining the bottom boundary of said gap at the back of said first element;
• said side members, said first series of slats, and said first, second and third single slats collectively defining a recess in said first element, said recess being accessible at least at open upper and lower ends of said first element;
• and
• a second element including:
• third and fourth elongated side members substantially symmetrical with said first and second side members, said third and fourth side members having substantially parallel forward and rear major edges and being spaced apart for a distance sufficiently less than said first and second members so that said third and fourth members fit closely inside said first and second members and are free to slide therebetween;
• a second series of parallel, slightly spaced apart slats aligned transversely and secured rigidly to even upward edges of said third and fourth side members along a front portion of said second element to provide a seat;
• whereby said second element may be slipped substantially entirely within said recess of said first element with the second series of slats adjacent and facing oppositely the first series of slats to place said chair construction in an essentially flat storage and carrying configuration and whereby a rear portion of said second element may be slipped through said gap to place said chair construction in an occupiable chair configuration wherein said second seat providing element is held rigidly at a predetermined angle relative to said first backrest providing element by interaction of said lowermost slat, said first slat, said second slat, and said third slat with respect to said third and fourth elongated side members.