Louver for light distribution

Claim 1

In a lighting fixture assembly including an elongated lamp surmounting a louver unit which has first vertically orientated blades extending longitudinally of the axis of the elongated lamp and second vertically orientated blades extending transversely of the axis of the elongated lamp whereby said blades form a plurality of cells between opposed side surfaces of said blades and the cells are open from the upper surfaces of the blades to the lower surfaces thereof, the improvement comprising: a. in at least a substantial majority of the cells, the opposed side surfaces on said first blades each having at least a portion thereof curved about a horizontal axis, b. in said cells the opposed side surfaces on said second blades each having at least a portion thereof curved about a horizontal axis, c. the radius of curvature of said curved surface portion on each of said first longitudinally extending blades being smaller than the radius of curvature of said surface portion on each of said second transversely extending blades whereby light rays emitted from said elongated lamp longitudinally thereof strike said second transversely extending blades and are reflected at a greater angle to the vertical than light which is emitted transversely of said elongated lamp and strikes said side surfaces of said first longitudinally extending blades to provide a substantially uniform light effect.