Lateral motion chair arm mechanism for chair arm

A support arm for a chair includes a base component and a support body interconnected therewith wherein opposite ends of the support body are movable longitudinally and laterally. The opposite ends may be displaced simultaneously in opposite lateral directions to permit angular displacement of the support body. The connector arrangement which interconnects the support body to the base component includes two sets of locking formations wherein the first set include longitudinally elongate parallel slots and the second set include an array of lateral rows and longitudinal columns of openings. The holes define the lateral and longitudinal position of one end of the support body while the slots define the lateral position of the opposite end of the support body.